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200 | aae1433e-6ddd-11ea-8416-ccda262736ce | https://socratic.org/questions/a-12-0-l-sample-of-argon-gas-has-a-pressure-of-28-0-atm-what-volume-would-this-g | 34.64 L | start physical_unit 16 17 volume l qc_end physical_unit 3 6 1 2 volume qc_end physical_unit 3 6 11 12 pressure qc_end physical_unit 3 6 20 21 pressure qc_end end | [{"type":"physical unit","value":"Volume2 [OF] this gas [IN] L"}] | [{"type":"physical unit","value":"34.64 L"}] | [{"type":"physical unit","value":"Volume1 [OF] argon gas sample [=] \\pu{12.0 L}"},{"type":"physical unit","value":"Pressure1 [OF] argon gas sample [=] \\pu{28.0 atm}"},{"type":"physical unit","value":"Pressure2 [OF] argon gas sample [=] \\pu{9.70 atm}"}] | <h1 class="questionTitle" itemprop="name">A 12.0 L sample of argon gas has a pressure of 28.0 atm. What volume would this gas occupy at 9.70 atm? </h1> | null | 34.64 L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Let's start off with identifying our known and unknown variables. <br/>
The first volume we have is 12.0 L, the first pressure is 28.0 atm, and the second pressure is 9.70 atm. Our only unknown is the second volume... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The volume that this gas occupies is <mathjax>#34.6 L#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Let's start off with iden... | <article>
<h1 class="questionTitle" itemprop="name">A 12.0 L sample of argon gas has a pressure of 28.0 atm. What volume would this gas occupy at 9.70 atm? </h1>
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<a href="/chemistry" itemprop=... | A 12.0 L sample of argon gas has a pressure of 28.0 atm. What volume would this gas occupy at 9.70 atm? | null |
201 | ac876e8e-6ddd-11ea-9ccd-ccda262736ce | https://socratic.org/questions/57b671367c014948ffb15435 | 4.17 | start physical_unit 5 5 ph none qc_end physical_unit 5 5 9 12 [h3o+] qc_end end | [{"type":"physical unit","value":"pH [OF] the solution"}] | [{"type":"physical unit","value":"4.17"}] | [{"type":"physical unit","value":"[H3O+] [OF] the solution [=] \\pu{6.7 × 10^(-5) mol/L}"}] | <h1 class="questionTitle" itemprop="name">What is #pH# for a solution whose #[H_3O^+]=6.7xx10^-5*mol*L^-1#?</h1> | null | 4.17 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#pH=log_10[H_3O^+]#</mathjax> (equivalently <mathjax>#pH=log_10[H^+]#</mathjax>).</p>
<p>Thus <mathjax>#pH=log_10(6.7xx10^-5)#</mathjax> <mathjax>#=#</mathjax> <mathjax>#-(-4.17)#</mathjax></p>
<p>Note tha... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#pH=4.17#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#pH=log_10[H_3O^+]#</mathjax> (equivalently <mathjax... | <article>
<h1 class="questionTitle" itemprop="name">What is #pH# for a solution whose #[H_3O^+]=6.7xx10^-5*mol*L^-1#?</h1>
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<span class="breadcrumb" itempro... | What is #pH# for a solution whose #[H_3O^+]=6.7xx10^-5*mol*L^-1#? | null |
202 | ac3b2d79-6ddd-11ea-899d-ccda262736ce | https://socratic.org/questions/how-many-grams-of-sulfur-are-needed-to-produce-1-40-moles-of-sodium-sulfide | 44.80 grams | start physical_unit 4 4 mass g qc_end physical_unit 12 13 9 10 mole qc_end end | [{"type":"physical unit","value":"Mass [OF] sulfur [IN] grams"}] | [{"type":"physical unit","value":"44.80 grams"}] | [{"type":"physical unit","value":"Mole [OF] sodium sulfide [=] \\pu{1.40 moles}"}] | <h1 class="questionTitle" itemprop="name">How many grams of sulfur are needed to produce 1.40 moles of sodium sulfide?</h1> | null | 44.80 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Formula of sodium sulfide is <mathjax>#Na_2S#</mathjax> ,This means 1 mole sulfide will contain 1 mole or 32g sulfur . Hence 1.4 mole sulfide salt requires 1.4x32=44.8 g sulfur</p></div>
</div>
</div> | <div class="answerText" itemprop="text">
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<div>
<div class="markdown"><p>44.8 g of sulfur is needed</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Formula of sodium sulfide is <mathjax>#Na_2S#</mathjax> ,This ... | <article>
<h1 class="questionTitle" itemprop="name">How many grams of sulfur are needed to produce 1.40 moles of sodium sulfide?</h1>
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<span class="breadcru... | How many grams of sulfur are needed to produce 1.40 moles of sodium sulfide? | null |
203 | abc67754-6ddd-11ea-a0ec-ccda262736ce | https://socratic.org/questions/how-many-grams-of-nacl-are-present-in-350-ml-of-0-020-m-nacl-solution-remember-t | 0.41 grams | start physical_unit 4 4 mass g qc_end physical_unit 13 14 8 9 volume qc_end physical_unit 13 14 11 12 molarity qc_end physical_unit 4 4 19 20 molar_mass qc_end end | [{"type":"physical unit","value":"Mass [OF] NaCl [IN] grams"}] | [{"type":"physical unit","value":"0.41 grams"}] | [{"type":"physical unit","value":"Volume [OF] NaCl solution [=] \\pu{350 mL}"},{"type":"physical unit","value":"Molarity [OF] NaCl solution [=] \\pu{0.020 M}"},{"type":"physical unit","value":"Molar mass [OF] NaCl [=] \\pu{58.44 g/mole}"}] | <h1 class="questionTitle" itemprop="name">How many grams of NaCl are present in 350 mL of 0.020 M NaCL solution? (Remember that 1 mole NaCL = 58.44 grams g/mole.)?</h1> | null | 0.41 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>As stated, 1 mole of NaCl weighs 58.44 g.</p>
<p>A 0.02 M solution contains 0.02 moles per liter.</p>
<p>Hence, 1 litre would contain:</p>
<p>58.44 x 0.02 = 1.1688 g</p>
<p>However, there are only 350 ml, which is ... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>0.409 g</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>As stated, 1 mole of NaCl weighs 58.44 g.</p>
<p>A 0.02 M solution contains 0.02 m... | <article>
<h1 class="questionTitle" itemprop="name">How many grams of NaCl are present in 350 mL of 0.020 M NaCL solution? (Remember that 1 mole NaCL = 58.44 grams g/mole.)?</h1>
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<a href="/che... | How many grams of NaCl are present in 350 mL of 0.020 M NaCL solution? (Remember that 1 mole NaCL = 58.44 grams g/mole.)? | null |
204 | ad1fc9bf-6ddd-11ea-a24c-ccda262736ce | https://socratic.org/questions/5616baf3581e2a51d0aadac7 | 24.00 mol/L | start physical_unit 5 6 concentration mol/l qc_end physical_unit 12 12 9 10 concentration qc_end end | [{"type":"physical unit","value":"Concentration [OF] sulfate ion [IN] mol/L"}] | [{"type":"physical unit","value":"24.00 mol/L"}] | [{"type":"physical unit","value":"Concentration [OF] Mn(SO4)2 [=] \\pu{12 mol/L}"}] | <h1 class="questionTitle" itemprop="name">What is the concentration of sulfate ion in a #12*mol*L^-1# of #Mn(SO_4)_2#?</h1> | null | 24.00 mol/L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>If it is indeed <mathjax>#Mn(IV)#</mathjax> sulfate, the concentration is <mathjax>#2xx#</mathjax> the stated concentration.</p></div>
</div>
</div> | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>Concentration of <mathjax>#Mn(SO_4)_2#</mathjax> in a <mathjax>#12*mol*L^(-1)#</mathjax> solution? Are you sure it's <mathjax>#Mn(IV)#</mathjax>? </p></div>
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<h4 class="answ... | <article>
<h1 class="questionTitle" itemprop="name">What is the concentration of sulfate ion in a #12*mol*L^-1# of #Mn(SO_4)_2#?</h1>
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<span class="breadcru... | What is the concentration of sulfate ion in a #12*mol*L^-1# of #Mn(SO_4)_2#? | null |
205 | a9480294-6ddd-11ea-82a4-ccda262736ce | https://socratic.org/questions/if-the-heat-of-combustion-for-a-specific-compound-is-1110-0-kj-mol-and-its-molar | 67.22 grams | start physical_unit 23 24 mass g qc_end physical_unit 23 24 10 11 enthalpy_of_combustion qc_end physical_unit 23 24 17 18 molar_mass qc_end physical_unit 23 24 30 31 heat_energy qc_end end | [{"type":"physical unit","value":"Mass [OF] this compound [IN] grams"}] | [{"type":"physical unit","value":"67.22 grams"}] | [{"type":"physical unit","value":"Heat of combustion [OF] this compound [=] \\pu{-1110.0 kJ/mol}"},{"type":"physical unit","value":"Molar mass [OF] this compound [=] \\pu{89.45 g/mol}"},{"type":"physical unit","value":"Released heat [OF] this compound [=] \\pu{834.20 kJ}"}] | <h1 class="questionTitle" itemprop="name">If the heat of combustion for a specific compound is -1110.0 kJ/mol and its molar mass is 89.45 g/mol, how many grams of this compound must you burn to release 834.20 kJ of heat? </h1> | null | 67.22 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#834.20kJ((mol)/(1110.0kJ))((89.45g)/(mol)) = 67.22g#</mathjax></p>
<p>The reason the sign was changed is because "releasing" heat in the question implies an exothermic system. That's exactly what this sub... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#67.22g#</mathjax> of the substance must be burned to release that much heat.</p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><ma... | <article>
<h1 class="questionTitle" itemprop="name">If the heat of combustion for a specific compound is -1110.0 kJ/mol and its molar mass is 89.45 g/mol, how many grams of this compound must you burn to release 834.20 kJ of heat? </h1>
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<span itemscope="" itemt... | If the heat of combustion for a specific compound is -1110.0 kJ/mol and its molar mass is 89.45 g/mol, how many grams of this compound must you burn to release 834.20 kJ of heat? | null |
206 | ad0eccca-6ddd-11ea-954c-ccda262736ce | https://socratic.org/questions/given-the-balanced-equation-representing-a-reaction-mg-s-ni-2-aq-mg-2-aq-ni-s-wh | 2.00 moles | start physical_unit 22 25 mole mol qc_end chemical_equation 7 13 qc_end end | [{"type":"physical unit","value":"Mole [OF] electrons lost by Mg(s) [IN] moles"}] | [{"type":"physical unit","value":"2.00 moles"}] | [{"type":"physical unit","value":"Mole [OF] electrons gained by Ni^2+(aq) [=] \\pu{2.0 moles}"},{"type":"chemical equation","value":"Mg(s) + Ni^2+(aq) -> Mg^2+(aq) + Ni(s)"}] | <h1 class="questionTitle" itemprop="name">Given the balanced equation representing a reaction: #Mg(s) + Ni^(2+)(aq) -> Mg^(2+)(aq) + Ni(s)# What is the total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by #Ni^(2+)#(aq)?</h1> | null | 2.00 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Since the equation is balanced, the reactants (and their total charge) must equal the products and their overall charge. </p>
<p>In other words, nothing is lost during the reaction. </p>
<p>In this reaction, magne... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>There are also 2.0 moles of electrons lost from Mg.</p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Since the equation is balanced, the re... | <article>
<h1 class="questionTitle" itemprop="name">Given the balanced equation representing a reaction: #Mg(s) + Ni^(2+)(aq) -> Mg^(2+)(aq) + Ni(s)# What is the total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by #Ni^(2+)#(aq)?</h1>
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<div class="breadcrum... | Given the balanced equation representing a reaction: #Mg(s) + Ni^(2+)(aq) -> Mg^(2+)(aq) + Ni(s)# What is the total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by #Ni^(2+)#(aq)? | null |
207 | aaabf524-6ddd-11ea-bcb2-ccda262736ce | https://socratic.org/questions/what-is-the-ph-of-a-solution-whose-h-3o-concentration-is-1-10-9 | 9.00 | start physical_unit 6 6 ph none qc_end physical_unit 8 8 11 13 concentration qc_end end | [{"type":"physical unit","value":"pH [OF] the solution"}] | [{"type":"physical unit","value":"9.00"}] | [{"type":"physical unit","value":"Concentration [OF] H3O+ [=] \\pu{1 × 10^(-9)}"}] | <h1 class="questionTitle" itemprop="name">What is the pH of a solution whose #H_3O^+# concentration is #1*10^-9#?</h1> | null | 9.00 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><a href="https://socratic.org/chemistry/acids-and-bases/the-ph-concept">pH</a> of an acid is given by <mathjax>#-log[H_3O]#</mathjax></p>
<p>Where <mathjax>#[H_3O]#</mathjax> is concentration of <mathjax>#[H_3O]#</... | <div class="answerText" itemprop="text">
<div class="answerSummary">
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<div class="markdown"><p>9</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><a href="https://socratic.org/chemistry/acids-and-bases/the-ph-concept">pH</a> of an aci... | <article>
<h1 class="questionTitle" itemprop="name">What is the pH of a solution whose #H_3O^+# concentration is #1*10^-9#?</h1>
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<span class="breadcrumb" i... | What is the pH of a solution whose #H_3O^+# concentration is #1*10^-9#? | null |
208 | a9cde81a-6ddd-11ea-b0c7-ccda262736ce | https://socratic.org/questions/a-mass-of-18-gram-of-compound-m-2-co-3-x-h-2-o-molar-mass-of-m-24-g-mol-is-disso | 2 | start physical_unit 41 41 value none qc_end physical_unit 8 8 3 4 mass qc_end physical_unit 9 10 12 13 molar_mass qc_end physical_unit 20 20 17 18 volume qc_end physical_unit 27 28 25 26 molarity qc_end physical_unit 27 28 17 18 volume qc_end end | [{"type":"physical unit","value":"Value [OF] x"}] | [{"type":"physical unit","value":"2"}] | [{"type":"physical unit","value":"Mass [OF] M2CO3.xH2O [=] \\pu{18 g}"},{"type":"physical unit","value":"M [OF] M metal [=] \\pu{24 g/mol}"},{"type":"physical unit","value":"Volume [OF] water [=] \\pu{500 mL}"},{"type":"physical unit","value":"Molarity [OF] HCl solution [=] \\pu{0.5 M}"},{"type":"physical unit","value"... | <h1 class="questionTitle" itemprop="name">A mass of #"18 g"# of a compound #"M"_2"CO"_3 * x"H"_2"O"# #(M_ "M metal" = "24 g/mol")# is dissolved in #"500 mL"# of water and titrated against a #"0.5-M"# #"HCl"# solution. If the volume of #"HCl"# consumed is #"500 mL"#, the value of #x# is?</h1> | null | 2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The idea here is that you can use the number of moles of <em>anhydrous metal carbonate</em> that took place in the reaction to figure out the number of moles of water present in the hydrate. </p>
<p>You know that y... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#x = 2#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The idea here is that you can use the number of moles of <em>an... | <article>
<h1 class="questionTitle" itemprop="name">A mass of #"18 g"# of a compound #"M"_2"CO"_3 * x"H"_2"O"# #(M_ "M metal" = "24 g/mol")# is dissolved in #"500 mL"# of water and titrated against a #"0.5-M"# #"HCl"# solution. If the volume of #"HCl"# consumed is #"500 mL"#, the value of #x# is?</h1>
<div class="clear... | A mass of #"18 g"# of a compound #"M"_2"CO"_3 * x"H"_2"O"# #(M_ "M metal" = "24 g/mol")# is dissolved in #"500 mL"# of water and titrated against a #"0.5-M"# #"HCl"# solution. If the volume of #"HCl"# consumed is #"500 mL"#, the value of #x# is? | null |
209 | ac243d50-6ddd-11ea-8f89-ccda262736ce | https://socratic.org/questions/58c816707c0149606678cb5e | MgCO3(s) ->[\delta] MgO(s) + CO2(g) | start chemical_equation qc_end substance 2 3 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the equation"}] | [{"type":"chemical equation","value":"MgCO3(s) ->[\\delta] MgO(s) + CO2(g)"}] | [{"type":"substance name","value":"Magnesium carbonate"}] | <h1 class="questionTitle" itemprop="name">How does magnesium carbonate decompose under heating?</h1> | null | MgCO3(s) ->[\delta] MgO(s) + CO2(g) | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Most metal carbonates decompose according to this scheme to give the metal oxide and carbon dioxide gas. I leave it to you to calculate the percentage loss with respect to the magnesium salt. The <a href="https:/... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#MgCO_3(s) + Delta rarr MgO(s) + CO_2(g)uarr#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Most metal carbonates dec... | <article>
<h1 class="questionTitle" itemprop="name">How does magnesium carbonate decompose under heating?</h1>
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210 | aac939d0-6ddd-11ea-9555-ccda262736ce | https://socratic.org/questions/how-many-grams-of-nacl-equal-a-mole-of-naci | 58.44 grams | start physical_unit 4 4 mass g qc_end end | [{"type":"physical unit","value":"Mass [OF] NaCl [IN] grams"}] | [{"type":"physical unit","value":"58.44 grams"}] | [{"type":"physical unit","value":"Mole [OF] NaCl [=] \\pu{1 mole}"}] | <h1 class="questionTitle" itemprop="name">How many grams of NaCl equal a mole of NaCI? </h1> | null | 58.44 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The problem essentially wants you to find the <strong>molar mass</strong> of sodium chloride, <mathjax>#"NaCl"#</mathjax>. As you know, the <em>molar mass</em> of an ionic compound gives you the mass of <strong>one... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#"58.44247 g"#</mathjax></p></div>
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<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The problem essentially wants you to find the <strong>mo... | <article>
<h1 class="questionTitle" itemprop="name">How many grams of NaCl equal a mole of NaCI? </h1>
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<span class="breadcrumb" itemprop="title">Chemistry<... | How many grams of NaCl equal a mole of NaCI? | null |
211 | a8fe0006-6ddd-11ea-9373-ccda262736ce | https://socratic.org/questions/how-do-you-calculate-the-molarity-of-0-060-moles-nahco-3-in-1500-ml-of-solution | 0.04 M | start physical_unit 9 9 molarity mol/l qc_end physical_unit 9 9 7 8 mole qc_end physical_unit 14 14 11 12 volume qc_end end | [{"type":"physical unit","value":"Molarity [OF] NaHCO3 solution [IN] M"}] | [{"type":"physical unit","value":"0.04 M"}] | [{"type":"physical unit","value":"Mole [OF] NaHCO3 [=] \\pu{0.060 moles}"},{"type":"physical unit","value":"Volume [OF] NaHCO3 solution [=] \\pu{1500 mL}"}] | <h1 class="questionTitle" itemprop="name">How do you calculate the molarity of 0.060 moles #NaHCO_3# in 1500. mL of solution?</h1> | null | 0.04 M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#M = {"moles solute"}/{"litres solution"} = 0.060/{1500 cdot 10^-3} "mol"/L = 0.04 M#</mathjax></p></div>
</div>
</div> | <div class="answerText" itemprop="text">
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<div>
<div class="markdown"><p><mathjax>#[NaHCO_3] = 0.04 M#</mathjax>.</p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#M = {"moles solute"}/{"litres solution"... | <article>
<h1 class="questionTitle" itemprop="name">How do you calculate the molarity of 0.060 moles #NaHCO_3# in 1500. mL of solution?</h1>
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<span class="b... | How do you calculate the molarity of 0.060 moles #NaHCO_3# in 1500. mL of solution? | null |
212 | abf53648-6ddd-11ea-9c0b-ccda262736ce | https://socratic.org/questions/what-is-the-equilibrium-concentration-of-cl2in-a-100-liter-vessel-containing-o-2 | 3.03 × 10^(-3) M | start physical_unit 6 6 equilibrium_concentration mol/l qc_end physical_unit 11 11 9 10 volume qc_end physical_unit 16 16 13 14 mole qc_end physical_unit 21 21 18 19 mole qc_end chemical_equation 33 37 qc_end end | [{"type":"physical unit","value":"Equilibrium concentration [OF] Cl2 [IN] M"}] | [{"type":"physical unit","value":"3.03 × 10^(-3) M"}] | [{"type":"physical unit","value":"Volume [OF] vessel [=] \\pu{100 liters}"},{"type":"physical unit","value":"Mole [OF] PCI5 [=] \\pu{0.235 mole}"},{"type":"physical unit","value":"Mole [OF] PCI3 [=] \\pu{0.174 mole}"},{"type":"chemical equation","value":"PCI5(g) <=> Cl2(g) + PCI3(g)"},{"type":"physical unit","value":"K... | <h1 class="questionTitle" itemprop="name">What is the equilibrium concentration of Cl2in a 100 liter vessel containing o.235 mole of PCI5 and 0.174 mole of PCI3? </h1> | <div class="questionDetailsContainer">
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<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p>The compound <mathjax>#PCI_5#</mathjax> decomposes into <mathjax>#Cl_2#</mathjax> and <mathjax>#PCI_3#</mathjax>. The equilibrium of <mathjax>#PCI_5(g) rightleftharpoons Cl... | 3.03 × 10^(-3) M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We're asked to find the <strong>equilibrium concentration</strong> of <mathjax>#"Cl"_2#</mathjax> in a given reaction.</p>
<blockquote></blockquote>
<p>Let's first write the <strong>chemical equation</strong> for t... | <div class="answerText" itemprop="text">
<div class="answerSummary">
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<div class="markdown"><p><mathjax>#["Cl"_2] = 0.00303#</mathjax> <mathjax>#M#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We're asked to find the <st... | <article>
<h1 class="questionTitle" itemprop="name">What is the equilibrium concentration of Cl2in a 100 liter vessel containing o.235 mole of PCI5 and 0.174 mole of PCI3? </h1>
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<div class="markdow... | What is the equilibrium concentration of Cl2in a 100 liter vessel containing o.235 mole of PCI5 and 0.174 mole of PCI3? |
The compound #PCI_5# decomposes into #Cl_2# and #PCI_3#. The equilibrium of #PCI_5(g) rightleftharpoons Cl_2 (g) + PCI_3(g)# has a #K_(eq)# of #2.24 x 10^-2# at 327 #"^o#C.
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213 | a999c94a-6ddd-11ea-8663-ccda262736ce | https://socratic.org/questions/if-the-heat-of-combustion-for-a-specific-compound-is-1220-kj-mol-and-its-molar-m | 41.74 grams | start physical_unit 23 24 mass g qc_end physical_unit 8 8 10 11 enthalpy_of_combustion qc_end physical_unit 8 8 17 18 molar_mass qc_end physical_unit 23 24 30 31 heat_energy qc_end end | [{"type":"physical unit","value":"Mass [OF] this compound [IN] grams"}] | [{"type":"physical unit","value":"41.74 grams"}] | [{"type":"physical unit","value":"Heat of combustion [OF] the compound [=] \\pu{-1220 kJ/mol}"},{"type":"physical unit","value":"Molar mass [OF] the compound [=] \\pu{78.35 g/mol}"},{"type":"physical unit","value":"Released heat [OF] this compound [=] \\pu{649.90 kJ}"}] | <h1 class="questionTitle" itemprop="name">If the heat of combustion for a specific compound is -1220 kJ/mol and its molar mass is 78.35 g/mol, how many grams of this compound must you burn to release 649.90 kJ of heat?</h1> | null | 41.74 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Before doing anything else, make sure that you understand what a compound's <em>heat of combustion</em> tells you. </p>
<p>The heat of combustion, also referred to as the <em><a href="http://socratic.org/chemistry/... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#"41.7 g"#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Before doing anything else, make sure that you understand wh... | <article>
<h1 class="questionTitle" itemprop="name">If the heat of combustion for a specific compound is -1220 kJ/mol and its molar mass is 78.35 g/mol, how many grams of this compound must you burn to release 649.90 kJ of heat?</h1>
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<span itemscope="" itemtype... | If the heat of combustion for a specific compound is -1220 kJ/mol and its molar mass is 78.35 g/mol, how many grams of this compound must you burn to release 649.90 kJ of heat? | null |
214 | aaefeeb1-6ddd-11ea-a741-ccda262736ce | https://socratic.org/questions/how-many-moles-are-in-sodium-chloride-in-150-ml-of-a-2-mm-nacl-solution | 3.00 × 10^(-4) moles | start physical_unit 4 5 mole mol qc_end physical_unit 13 14 7 8 volume qc_end physical_unit 13 14 11 12 molarity qc_end end | [{"type":"physical unit","value":"Mole [OF] sodium chloride [IN] moles"}] | [{"type":"physical unit","value":"3.00 × 10^(-4) moles"}] | [{"type":"physical unit","value":"Volume [OF] NaCl solution [=] \\pu{150 mL}"},{"type":"physical unit","value":"Molarity [OF] NaCl solution [=] \\pu{2 mM}"}] | <h1 class="questionTitle" itemprop="name">How many moles are in sodium chloride in 150 mL of a 2 mM NaCl solution?</h1> | null | 3.00 × 10^(-4) moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#"Concentration"="Moles of solute"/"Volume of solution"#</mathjax></p>
<p>And thus <mathjax>#"moles of solute"="volume"xx"concentration"#</mathjax></p>
<p>And here, for this product we have:</p>
<p><mathja... | <div class="answerText" itemprop="text">
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<div>
<div class="markdown"><p><mathjax>#"Concentration"="Moles of solute"/"Volume of solution"#</mathjax>. And here there are:<br/>
<mathjax>#150xx10^-3cancelLxx2xx10^-3*mol*cancel(L^-1)=3.00xx10^-4*mol#</mathjax> of <a href="https://socratic.org/ch... | <article>
<h1 class="questionTitle" itemprop="name">How many moles are in sodium chloride in 150 mL of a 2 mM NaCl solution?</h1>
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<span class="breadcrumb" ... | How many moles are in sodium chloride in 150 mL of a 2 mM NaCl solution? | null |
215 | abb1db82-6ddd-11ea-afc5-ccda262736ce | https://socratic.org/questions/how-many-grams-of-cuso-4-are-present-in-652-ml-of-250-m-cuso-4-solution | 26.00 grams | start physical_unit 4 4 mass g qc_end physical_unit 13 14 8 9 volume qc_end physical_unit 13 14 11 12 molarity qc_end end | [{"type":"physical unit","value":"Mass [OF] CuSO4 [IN] grams"}] | [{"type":"physical unit","value":"26.00 grams"}] | [{"type":"physical unit","value":"Volume [OF] CuSO4 solution [=] \\pu{652 mL}"},{"type":"physical unit","value":"Molarity [OF] CuSO4 solution [=] \\pu{0.250 M}"}] | <h1 class="questionTitle" itemprop="name">How many grams of #CuSO_4# are present in 652 mL of .250 M #CuSO_4# solution?</h1> | null | 26.00 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We use the defining quotient....</p>
<p><mathjax>#"concentration"="moles of solute"/"volume of solution"#</mathjax></p>
<p>And thus <mathjax>#"moles of solute"="volume"xx"concentraion"#</mathjax></p>
<p>And for <ma... | <div class="answerText" itemprop="text">
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<div class="markdown"><p>Approx. <mathjax>#26*g#</mathjax> of salt.....</p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We use the defining quotient....</p>
<p><ma... | <article>
<h1 class="questionTitle" itemprop="name">How many grams of #CuSO_4# are present in 652 mL of .250 M #CuSO_4# solution?</h1>
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<span class="breadcr... | How many grams of #CuSO_4# are present in 652 mL of .250 M #CuSO_4# solution? | null |
216 | ad0d2334-6ddd-11ea-a373-ccda262736ce | https://socratic.org/questions/when-the-equation-fe-cl-2-fecl-3-is-balanced-what-is-the-coefficient-for-cl-2 | 3 | start physical_unit 5 5 coefficient none qc_end chemical_equation 3 7 qc_end end | [{"type":"physical unit","value":"Coefficient [OF] Cl2"}] | [{"type":"physical unit","value":"3"}] | [{"type":"chemical equation","value":"Fe + Cl2 -> FeCl3"}] | <h1 class="questionTitle" itemprop="name">When the equation #Fe + Cl_2 -> FeCl_3# is balanced, what is the coefficient for #Cl_2#?</h1> | null | 3 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>2Fe + 3Cl2 -> 2FeCl3</p></div>
</div>
</div> | <div class="answerText" itemprop="text">
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<div class="markdown"><p>3</p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>2Fe + 3Cl2 -> 2FeCl3</p></div>
</div>
</div>
</div> | <article>
<h1 class="questionTitle" itemprop="name">When the equation #Fe + Cl_2 -> FeCl_3# is balanced, what is the coefficient for #Cl_2#?</h1>
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<span ... | When the equation #Fe + Cl_2 -> FeCl_3# is balanced, what is the coefficient for #Cl_2#? | null |
217 | aa2198a2-6ddd-11ea-87f0-ccda262736ce | https://socratic.org/questions/58f992fa11ef6b5262ea1cd6 | 2.00 × 10^(-3) mol/L | start physical_unit 5 6 solubility mol/l qc_end physical_unit 13 14 9 10 molarity qc_end physical_unit 15 15 17 19 equilibrium_constant_k qc_end physical_unit 20 20 22 24 kf qc_end end | [{"type":"physical unit","value":"Solubility [OF] silver bromide [IN] mol/L"}] | [{"type":"physical unit","value":"2.00 × 10^(-3) mol/L"}] | [{"type":"physical unit","value":"Molarity [OF] potassium cyanide [=] \\pu{0.1 mol/L}"},{"type":"physical unit","value":"Ksp [OF] AgBr [=] \\pu{7.7 × 10^(-13)}"},{"type":"physical unit","value":"Kf [OF] Ag(CN)^2- [=] \\pu{5.6 × 10^8}"}] | <h1 class="questionTitle" itemprop="name">What is the solubility of silver bromide in a 0.1 mol/L solution of potassium cyanide?</h1> | <div class="questionDetailsContainer">
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<div class="markdown"><p>For <mathjax>#"AgBr", K_text(sp) = 7.7 × 10^"-13"#</mathjax>.</p>
<p>For <mathjax>#"Ag(CN)"_2^"-", K_text(f) = 5.6 ×
10^8#</mathjax>.</p></div>
</h2>
</div>
</div> | 2.00 × 10^(-3) mol/L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>We have the two equilibria:</p>
<p><mathjax>#"AgBr(s)" ⇌ "Ag"^"+""(aq)" + "Br"^"-""(aq)"; color(white)(mmml)K_text(sp) = 7.7 × 10^"-13"#</mathjax><br/>
<mathjax>#"Ag"^"+""(aq)" + "2CN"^"-"... | <div class="answerText" itemprop="text">
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<div class="markdown"><p>The solubility is 0.002 mol/L.</p></div>
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</div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>We have the two equilibria:</p>
<... | <article>
<h1 class="questionTitle" itemprop="name">What is the solubility of silver bromide in a 0.1 mol/L solution of potassium cyanide?</h1>
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<div class="markdown"><p>For <mathjax>#"AgBr", K_text... | What is the solubility of silver bromide in a 0.1 mol/L solution of potassium cyanide? |
For #"AgBr", K_text(sp) = 7.7 × 10^"-13"#.
For #"Ag(CN)"_2^"-", K_text(f) = 5.6 ×
10^8#.
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218 | ab44b708-6ddd-11ea-8b6a-ccda262736ce | https://socratic.org/questions/what-is-the-volume-of-5-0-grams-of-co-2-at-stp | 2.58 L | start physical_unit 8 8 volume l qc_end physical_unit 8 8 5 6 mass qc_end c_other STP qc_end end | [{"type":"physical unit","value":"Volume [OF] CO2 [IN] L"}] | [{"type":"physical unit","value":"2.58 L"}] | [{"type":"physical unit","value":"Mass [OF] CO2 [=] \\pu{5.0 grams}"},{"type":"other","value":"STP"}] | <h1 class="questionTitle" itemprop="name">What is the volume of 5.0 grams of #CO_2# at STP?</h1> | null | 2.58 L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#color(blue)("STP"#</mathjax></p>
<p>STP is currently <mathjax>#0^@"C"#</mathjax> or <mathjax>#"273.15 K"#</mathjax>, which are equal, though the Kelvin temperature scale is used for <a href="https://socra... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The volume of <mathjax>#"5.0 g CO"_2"#</mathjax> is <mathjax>#"2.6 L CO"_2"#</mathjax> at STP.</p></div>
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</div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown... | <article>
<h1 class="questionTitle" itemprop="name">What is the volume of 5.0 grams of #CO_2# at STP?</h1>
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<span class="breadcrumb" itemprop="title">Chemis... | What is the volume of 5.0 grams of #CO_2# at STP? | null |
219 | aaf0b23a-6ddd-11ea-b8a3-ccda262736ce | https://socratic.org/questions/57e95c2911ef6b3672700174 | 0.12 M | start physical_unit 11 13 concentration mol/l qc_end physical_unit 11 13 8 9 volume qc_end physical_unit 13 13 0 1 volume qc_end physical_unit 5 6 3 4 concentration qc_end end | [{"type":"physical unit","value":"Concentration [OF] sodium hydroxide solution [IN] M"}] | [{"type":"physical unit","value":"0.12 M"}] | [{"type":"physical unit","value":"Volume [OF] sodium hydroxide solution [=] \\pu{18.65 ml}"},{"type":"physical unit","value":"Volume [OF] oxalic acid solution [=] \\pu{10.00 ml}"},{"type":"physical unit","value":"Concentration [OF] oxalic acid solution [=] \\pu{0.1089 M}"}] | <h1 class="questionTitle" itemprop="name">10.00 ml of 0.1089 M oxalic acid neutralises 18.65 ml of sodium hydroxide solution. What is the concentration of the sodium hydroxide ?</h1> | null | 0.12 M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#sf(H_2C_2O_(4(aq))+2NaOH_((aq))rarrNa_2C_2O_(4(aq))+2H_2O_((l)))#</mathjax></p>
<p><mathjax>#sf(n_(H_2C_2O_4)=cxxv=0.1089xx10.00/1000=0.001089)#</mathjax></p>
<p><mathjax>#:.#</mathjax><mathjax>#sf(n_(NaO... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#sf([NaOH]=0.1168color(white)(x)"mol/l")#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#sf(H_2C_2O_(4(aq))+... | <article>
<h1 class="questionTitle" itemprop="name">10.00 ml of 0.1089 M oxalic acid neutralises 18.65 ml of sodium hydroxide solution. What is the concentration of the sodium hydroxide ?</h1>
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220 | a8d51149-6ddd-11ea-9323-ccda262736ce | https://socratic.org/questions/a-280-ml-solution-is-20-salt-how-much-water-should-be-added-to-make-the-solution | 120 mL | start physical_unit 9 9 volume ml qc_end physical_unit 3 3 1 2 volume qc_end physical_unit 6 6 5 5 percent qc_end physical_unit 6 6 17 17 percent qc_end end | [{"type":"physical unit","value":"Volume [OF] water [IN] mL"}] | [{"type":"physical unit","value":"120 mL"}] | [{"type":"physical unit","value":"Volume [OF] salt solution [=] \\pu{280 mL}"},{"type":"physical unit","value":"Percent1 [OF] salt in solution [=] \\pu{20%}"},{"type":"physical unit","value":"Percent2 [OF] salt in solution [=] \\pu{14%}"}] | <h1 class="questionTitle" itemprop="name">A 280 mL solution is 20% salt. How much water should be added to make the solution 14% salt?
</h1> | null | 120 mL | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The key to this problem is to realize that the amount of <a href="http://socratic.org/chemistry/solutions-and-their-behavior/solute">solute</a> you started with <strong>remains unchanged</strong> after the solution... | <div class="answerText" itemprop="text">
<div class="answerSummary">
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<div class="markdown"><p>You need to add <strong>120 mL</strong> of water. </p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The key to this problem is to realize t... | <article>
<h1 class="questionTitle" itemprop="name">A 280 mL solution is 20% salt. How much water should be added to make the solution 14% salt?
</h1>
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<spa... | A 280 mL solution is 20% salt. How much water should be added to make the solution 14% salt?
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221 | a93bcca6-6ddd-11ea-a8c1-ccda262736ce | https://socratic.org/questions/how-many-milliliters-of-0-200m-naoh-solution-are-needed-to-react-with-22-0-ml-of | 108.00 milliliters | start physical_unit 6 7 volume ml qc_end physical_unit 6 7 4 5 molarity qc_end physical_unit 19 20 17 18 molarity qc_end physical_unit 19 20 13 14 volume qc_end end | [{"type":"physical unit","value":"Volume [OF] NaOH solution [IN] milliliters"}] | [{"type":"physical unit","value":"108.00 milliliters"}] | [{"type":"physical unit","value":"Molarity [OF] NaOH solution [=] \\pu{0.200 M}"},{"type":"physical unit","value":"Molarity [OF] NiCl2 solution [=] \\pu{0.490 M}"},{"type":"physical unit","value":"Volume [OF] NiCl2 solution [=] \\pu{22.0 mL}"}] | <h1 class="questionTitle" itemprop="name">How many milliliters of 0.200M #NaOH# solution are needed to react with 22.0 mL of a 0.490 M #NiCl_2# solution?</h1> | null | 108.00 milliliters | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#NiCl_2(aq) + 2NaOH(aq) rarr Ni(OH)_2(s)darr + 2NaCl(aq)#</mathjax></p>
<p>There are <mathjax>#0.0108#</mathjax> <mathjax>#mol#</mathjax> <mathjax>#NiCl_2#</mathjax> (<mathjax>#22.0xx10^(-3)cancelLxx0.490*... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>There are <mathjax>#0.0108#</mathjax> <mathjax>#mol#</mathjax> <mathjax>#NiCl_2#</mathjax>. <mathjax>#0.0216#</mathjax> <mathjax>#mol#</mathjax> <mathjax>#NaOH#</mathjax> are required, given <mathjax>#0.200#</mathjax> <... | <article>
<h1 class="questionTitle" itemprop="name">How many milliliters of 0.200M #NaOH# solution are needed to react with 22.0 mL of a 0.490 M #NiCl_2# solution?</h1>
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222 | ac8c9180-6ddd-11ea-8036-ccda262736ce | https://socratic.org/questions/how-do-you-convert-1-35-10-24-atoms-of-carbon-to-moles-of-carbon | 2.24 moles | start physical_unit 9 9 mole mol qc_end end | [{"type":"physical unit","value":"Mole [OF] carbon [IN] moles"}] | [{"type":"physical unit","value":"2.24 moles"}] | [{"type":"physical unit","value":"Number [OF] carbon atoms [=] \\pu{1.35 × 10^24}"}] | <h1 class="questionTitle" itemprop="name">How do you convert #1.35 * 10^24# atoms of carbon to moles of carbon?</h1> | null | 2.24 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>And thus we take the quotient.......</p>
<p><mathjax>#(1.35xx10^24*C*"atoms")/(6.022xx10^23*C *"atoms"*mol^-1)=2.24*mol#</mathjax></p>
<p>And what mass of carbon does this molar quantity represent? You should be a... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>Well one mole of carbon specifies <mathjax>#6.022xx10^23#</mathjax> INDIVIDUAL carbon atoms, i.e. a mole of carbon.........</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h... | <article>
<h1 class="questionTitle" itemprop="name">How do you convert #1.35 * 10^24# atoms of carbon to moles of carbon?</h1>
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<span class="breadcrumb" ite... | How do you convert #1.35 * 10^24# atoms of carbon to moles of carbon? | null |
223 | ab452c9c-6ddd-11ea-987a-ccda262736ce | https://socratic.org/questions/what-is-the-boiling-point-of-a-solution-containing-2-33-g-of-caffeine-c-8h-10n-4 | 82.12 ℃ | start physical_unit 7 7 boiling_point_temperature °c qc_end physical_unit 13 13 9 10 mass qc_end physical_unit 19 19 16 17 mass qc_end physical_unit 24 25 27 28 boiling_point_temperature qc_end physical_unit 24 25 37 38 kbp qc_end end | [{"type":"physical unit","value":"Boiling point [OF] the solution [IN] ℃"}] | [{"type":"physical unit","value":"82.12 ℃"}] | [{"type":"physical unit","value":"Mass [OF] C8H10N4O2 [=] \\pu{2.33 g}"},{"type":"physical unit","value":"Mass [OF] benzene [=] \\pu{15.0 g}"},{"type":"physical unit","value":"Boiling point [OF] pure benzene [=] \\pu{80.1 ℃}"},{"type":"physical unit","value":"Kbp [OF] pure benzene [=] \\pu{2.53 ℃/m}"}] | <h1 class="questionTitle" itemprop="name">What is the boiling point of a solution containing 2.33 g of caffeine, #C_8H_10N_4O_2#, dissolved in 15.0 g of benzene? The boiling point of pure benzene is 80.1 °C and the boiling point elevation constant, Kbp, is 2.53 °C/m.</h1> | null | 82.12 ℃ | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>The formulae for <strong>boiling point elevation</strong> is</p>
<blockquote>
<blockquote>
<p><mathjax>#color(blue)(|bar(ul(ΔT_"b" = K_"b"m)|)#</mathjax></p>
</blockquote>
</blockquote>
<p... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The boiling point of the solution is 82.1 °C.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>The formulae for <... | <article>
<h1 class="questionTitle" itemprop="name">What is the boiling point of a solution containing 2.33 g of caffeine, #C_8H_10N_4O_2#, dissolved in 15.0 g of benzene? The boiling point of pure benzene is 80.1 °C and the boiling point elevation constant, Kbp, is 2.53 °C/m.</h1>
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<div class="br... | What is the boiling point of a solution containing 2.33 g of caffeine, #C_8H_10N_4O_2#, dissolved in 15.0 g of benzene? The boiling point of pure benzene is 80.1 °C and the boiling point elevation constant, Kbp, is 2.53 °C/m. | null |
224 | a92833a4-6ddd-11ea-a5ed-ccda262736ce | https://socratic.org/questions/how-many-grams-of-hydrogen-are-necessary-to-react-completely-with-50-0-g-of-nitr | 10.80 grams | start physical_unit 4 4 mass g qc_end physical_unit 14 14 11 12 mass qc_end chemical_equation 18 24 qc_end c_other OTHER qc_end end | [{"type":"physical unit","value":"Mass [OF] hydrogen [IN] grams"}] | [{"type":"physical unit","value":"10.80 grams"}] | [{"type":"physical unit","value":"Mass [OF] nitrogen [=] \\pu{50.0 g}"},{"type":"chemical equation","value":"N2 + 3 H2 -> 2 NH3"},{"type":"other","value":"React completely."}] | <h1 class="questionTitle" itemprop="name"> How many grams of hydrogen are necessary to react completely with 50.0 g of nitrogen in the reaction #N_2+3H_2->2NH_3#?</h1> | null | 10.80 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>As per the equation, let us calculate the mole ratio. </p>
<p><mathjax>#N_2 + 3H_2 → 2NH_3#</mathjax> </p>
<p>As per the equation one mole of nitrogen reacts with 1 mol of hydrogen. </p... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>10.80 g of <mathjax>#H_2#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>As per the equation, let us ... | <article>
<h1 class="questionTitle" itemprop="name"> How many grams of hydrogen are necessary to react completely with 50.0 g of nitrogen in the reaction #N_2+3H_2->2NH_3#?</h1>
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<a href="/c... | How many grams of hydrogen are necessary to react completely with 50.0 g of nitrogen in the reaction #N_2+3H_2->2NH_3#? | null |
225 | ac04ebc0-6ddd-11ea-b55e-ccda262736ce | https://socratic.org/questions/the-ph-of-a-2m-solution-of-naoh-is-please-include-the-complete-solution-of-the-p | 14.30 | start physical_unit 6 6 ph none qc_end physical_unit 8 8 4 5 molarity qc_end end | [{"type":"physical unit","value":"pH [OF] NaOH solution"}] | [{"type":"physical unit","value":"14.30"}] | [{"type":"physical unit","value":"Molarity [OF] NaOH solution [=] \\pu{2 M}"}] | <h1 class="questionTitle" itemprop="name">The pH of a 2M solution of NaOH is...? (please include the complete solution of the problem)</h1> | null | 14.30 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>For starters, you should know that an aqueous solution at room temperature has</p>
<blockquote>
<p><mathjax>#color(blue)(ul(color(black)("pH + pOH = 14")))#</mathjax></p>
</blockquote>
<p>This means that you expres... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"pH" = 14.3#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>For starters, you should know that an aqueous solution at... | <article>
<h1 class="questionTitle" itemprop="name">The pH of a 2M solution of NaOH is...? (please include the complete solution of the problem)</h1>
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<span... | The pH of a 2M solution of NaOH is...? (please include the complete solution of the problem) | null |
226 | aa3a7e12-6ddd-11ea-82c5-ccda262736ce | https://socratic.org/questions/how-many-moles-of-h-2so-4-are-present-in-0-500-l-of-a-0-150-m-h-2so-4-solution | 0.08 moles | start physical_unit 4 4 mole mol qc_end physical_unit 14 15 8 9 volume qc_end physical_unit 14 15 12 13 molarity qc_end end | [{"type":"physical unit","value":"Mole [OF] H2SO4 [IN] moles"}] | [{"type":"physical unit","value":"0.08 moles"}] | [{"type":"physical unit","value":"Volume [OF] H2SO4 solution [=] \\pu{0.500 L}"},{"type":"physical unit","value":"Molarity [OF] H2SO4 solution [=] \\pu{0.150 M}"}] | <h1 class="questionTitle" itemprop="name">How many moles of #H_2SO_4# are present in 0.500 L of a 0.150 M #H_2SO_4# solution? </h1> | null | 0.08 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Numer of moles of <mathjax>#H_2SO_4#</mathjax> are present in 0.500 L of a 0.150 M <mathjax>#H_2SO_4#</mathjax> solution is <br/>
<mathjax>#="concentration in molarity"xx "Volume in liter" #</mathjax><br/>
<mathjax... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#0.075mol#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Numer of moles of <mathjax>#H_2SO_4#</mathjax> are present i... | <article>
<h1 class="questionTitle" itemprop="name">How many moles of #H_2SO_4# are present in 0.500 L of a 0.150 M #H_2SO_4# solution? </h1>
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<span class="... | How many moles of #H_2SO_4# are present in 0.500 L of a 0.150 M #H_2SO_4# solution? | null |
227 | abc5e128-6ddd-11ea-830a-ccda262736ce | https://socratic.org/questions/a-775-ml-sample-of-nitrogen-gas-is-cooled-from-67-c-to-42-c-what-is-the-new-volu | 718.01 mL | start physical_unit 3 6 volume ml qc_end physical_unit 3 6 1 2 volume qc_end physical_unit 3 6 10 11 temperature qc_end physical_unit 3 6 13 14 temperature qc_end c_other OTHER qc_end end | [{"type":"physical unit","value":"Volume2 [OF] nitrogen gas sample [IN] mL"}] | [{"type":"physical unit","value":"718.01 mL"}] | [{"type":"physical unit","value":"Volume1 [OF] nitrogen gas sample [=] \\pu{775 mL}"},{"type":"physical unit","value":"Temperature1 [OF] nitrogen gas sample [=] \\pu{67 ℃}"},{"type":"physical unit","value":"Temperature2 [OF] nitrogen gas sample [=] \\pu{42 ℃}"},{"type":"other","value":"The pressure remains the same."}] | <h1 class="questionTitle" itemprop="name">A 775 ml sample of nitrogen gas is cooled from 67#"^@#C to 42#"^@#C. What is the new volume if the pressure remains the same?</h1> | null | 718.01 mL | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We apply <a href="https://socratic.org/chemistry/the-behavior-of-gases/charles-law">Charles' Law</a></p>
<p><mathjax>#V_1/T_1=V_2/T_2#</mathjax></p>
<p>Volume, <mathjax>#V_1=0.775L#</mathjax></p>
<p>Temperature, <m... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The new volume is <mathjax>#=718mL#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We apply <a href="https://socratic.org/chemi... | <article>
<h1 class="questionTitle" itemprop="name">A 775 ml sample of nitrogen gas is cooled from 67#"^@#C to 42#"^@#C. What is the new volume if the pressure remains the same?</h1>
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<a href="... | A 775 ml sample of nitrogen gas is cooled from 67#"^@#C to 42#"^@#C. What is the new volume if the pressure remains the same? | null |
228 | a8ca8a1a-6ddd-11ea-889c-ccda262736ce | https://socratic.org/questions/how-much-heat-does-it-take-to-raise-the-temperature-of-2-5-kg-of-plastic-from-15 | 390 kJ | start physical_unit 14 14 heat_energy kj qc_end physical_unit 14 14 16 17 temperature qc_end physical_unit 14 14 19 20 temperature qc_end physical_unit 14 14 11 12 mass qc_end end | [{"type":"physical unit","value":"Taken heat [OF] plastic [IN] kJ"}] | [{"type":"physical unit","value":"390 kJ"}] | [{"type":"physical unit","value":"Temperature1 [OF] plastic [=] \\pu{15 ℃}"},{"type":"physical unit","value":"Temperature2 [OF] plastic [=] \\pu{75 ℃}"},{"type":"physical unit","value":"Mass [OF] plastic [=] \\pu{2.5 kg}"}] | <h1 class="questionTitle" itemprop="name">How much heat does it take to raise the temperature of 2.5 kg of plastic from 15°C to 75°C?</h1> | <div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p>The specific heat of plastic is 2.60 kJ/(kg•°C)</p></div>
</h2>
</div>
</div> | 390 kJ | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>The energy <mathjax>#q#</mathjax> required to heat an object is given by the formula</p>
<blockquote>
<blockquote>
<p><mathjax>#color(blue)(bar(ul(|color(white)(a/a)q = mcΔTcolor(white)(a... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>It will take 390 kJ of heat.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>The energy <mathjax>#q#</mathjax> ... | <article>
<h1 class="questionTitle" itemprop="name">How much heat does it take to raise the temperature of 2.5 kg of plastic from 15°C to 75°C?</h1>
<div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p>The specific heat of pl... | How much heat does it take to raise the temperature of 2.5 kg of plastic from 15°C to 75°C? |
The specific heat of plastic is 2.60 kJ/(kg•°C)
|
229 | aa147e22-6ddd-11ea-a6ec-ccda262736ce | https://socratic.org/questions/if-i-add-75-ml-of-water-to-125-ml-of-a-0-15-m-naoh-solution-what-will-the-molari | 0.09 M | start physical_unit 22 23 molarity mol/l qc_end physical_unit 14 15 12 13 molarity qc_end physical_unit 6 6 3 4 volume qc_end physical_unit 14 15 8 9 volume qc_end end | [{"type":"physical unit","value":"Molarity2 [OF] diluted solution [IN] M"}] | [{"type":"physical unit","value":"0.09 M"}] | [{"type":"physical unit","value":"Molarity1 [OF] NaOH solution [=] \\pu{0.15 M}"},{"type":"physical unit","value":"Volume1 [OF] water [=] \\pu{75 mL}"},{"type":"physical unit","value":"Volume [OF] NaOH solution [=] \\pu{125 mL}"}] | <h1 class="questionTitle" itemprop="name">If I add 75 mL of water to 125 mL of a 0.15 M #NaOH# solution, what will the molarity of the diluted solution be?</h1> | null | 0.09 M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><a href="https://socratic.org/chemistry/solutions-and-their-behavior/molarity">Molarity</a> refers to the number of moles of a substance per litre of substance.</p>
<p>125/1000=0.125 (This is the proportion of 1 li... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>0.09375 mol <mathjax>#dm^-3#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><a href="https://socratic.org/chemistry/solutions-a... | <article>
<h1 class="questionTitle" itemprop="name">If I add 75 mL of water to 125 mL of a 0.15 M #NaOH# solution, what will the molarity of the diluted solution be?</h1>
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<a href="/chemistry" ... | If I add 75 mL of water to 125 mL of a 0.15 M #NaOH# solution, what will the molarity of the diluted solution be? | null |
230 | ace8b201-6ddd-11ea-85e3-ccda262736ce | https://socratic.org/questions/if-100-00-j-are-added-to-20-0-g-water-at-30-0-c-what-will-be-the-final-temperatu | 31.20 ℃ | start physical_unit 8 8 temperature °c qc_end physical_unit 8 8 10 11 temperature qc_end physical_unit 8 8 1 2 energy qc_end physical_unit 8 8 6 7 mass qc_end end | [{"type":"physical unit","value":"Temperature2 [OF] water [IN] ℃"}] | [{"type":"physical unit","value":"31.20 ℃"}] | [{"type":"physical unit","value":"Temperature1 [OF] water [=] \\pu{30.0 ℃}"},{"type":"physical unit","value":"Added energy [OF] water [=] \\pu{100.00 J}"},{"type":"physical unit","value":"Mass [OF] water [=] \\pu{20.0 g}"}] | <h1 class="questionTitle" itemprop="name">If 100.00 J are added to 20.0 g water at 30.0°C, what will be the final temperature of the water?</h1> | null | 31.20 ℃ | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>The formula for the heat gained or lost by a substance is</p>
<blockquote>
<blockquote>
<p><mathjax>#color(blue)(bar(ul(|color(white)(a/a)q = mcΔTcolor(white)(a/a)|)))" "#</mathjax></p>
</... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The final temperature of the water will be 31.2 °C.</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>The formula ... | <article>
<h1 class="questionTitle" itemprop="name">If 100.00 J are added to 20.0 g water at 30.0°C, what will be the final temperature of the water?</h1>
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... | If 100.00 J are added to 20.0 g water at 30.0°C, what will be the final temperature of the water? | null |
231 | a956d42d-6ddd-11ea-8e72-ccda262736ce | https://socratic.org/questions/the-ksp-of-manganese-ii-carbonate-mnco-3-is-2-42-10-11-what-is-the-solubility-of | 5.65 × 10^(-5) g/L | start physical_unit 15 16 solubility g/l qc_end physical_unit 5 5 7 9 equilibrium_constant_k qc_end end | [{"type":"physical unit","value":"Solubility [OF] this compound [IN] g/L"}] | [{"type":"physical unit","value":"5.65 × 10^(-5) g/L"}] | [{"type":"physical unit","value":"Ksp [OF] MnCO3 [=] \\pu{2.42 × 10^(-11)}"}] | <h1 class="questionTitle" itemprop="name">The Ksp of manganese(II) carbonate, #MnCO_3#, is #2.42 * 10^-11#. What is the solubility of this compound in g/L?</h1> | null | 5.65 × 10^(-5) g/L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Manganese(II) carbonate dissociate in water according to the following equation:</p>
<p><mathjax>#MnCO_3(s)rightleftharpoonsMn^(2+)(aq)+CO_3^(2-)(aq)" " "K_(sp)=2.42xx10^(-11)#</mathjax></p>
<p>The expression of ... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#s=5.65xx10^(-5)g/L#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Manganese(II) carbonate dissociate in water accord... | <article>
<h1 class="questionTitle" itemprop="name">The Ksp of manganese(II) carbonate, #MnCO_3#, is #2.42 * 10^-11#. What is the solubility of this compound in g/L?</h1>
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<a href="/chemistry" ... | The Ksp of manganese(II) carbonate, #MnCO_3#, is #2.42 * 10^-11#. What is the solubility of this compound in g/L? | null |
232 | a8fe9c06-6ddd-11ea-a76f-ccda262736ce | https://socratic.org/questions/a-gas-sample-weighing-3-78-grams-occupies-a-volume-of-2-28-l-at-stp-what-is-the- | 37.6 g/mol | start physical_unit 20 21 molecular_weight g/mol qc_end physical_unit 1 2 4 5 mass qc_end physical_unit 1 2 10 11 volume qc_end c_other STP qc_end end | [{"type":"physical unit","value":"Molecular mass [OF] the sample [IN] g/mol"}] | [{"type":"physical unit","value":"37.6 g/mol"}] | [{"type":"physical unit","value":"Mass [OF] the gas sample [=] \\pu{3.78 grams}"},{"type":"physical unit","value":"Volume [OF] the gas sample [=] \\pu{2.28 L}"},{"type":"other","value":"STP"}] | <h1 class="questionTitle" itemprop="name">A gas sample weighing 3.78 grams occupies a volume of 2.28 L at STP. What is the molecular mass of the sample? </h1> | null | 37.6 g/mol | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The trick here is to realize that if you know the <em>volume</em> of a gas at <strong>STP</strong>, you can use the fact that <mathjax>#1#</mathjax> <strong>mole</strong> of any ideal gas occupies <mathjax>#"22.7 L... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"37.6 g mol"^(-1)#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The trick here is to realize that if you know the <... | <article>
<h1 class="questionTitle" itemprop="name">A gas sample weighing 3.78 grams occupies a volume of 2.28 L at STP. What is the molecular mass of the sample? </h1>
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<a href="/chemistry" it... | A gas sample weighing 3.78 grams occupies a volume of 2.28 L at STP. What is the molecular mass of the sample? | null |
233 | aa346325-6ddd-11ea-80d1-ccda262736ce | https://socratic.org/questions/what-is-the-ph-of-a-1-10-5-m-solution-of-sulfuric-acid | 4.73 | start physical_unit 10 10 ph none qc_end physical_unit 12 13 6 9 molarity qc_end end | [{"type":"physical unit","value":"pH [OF] sulfuric acid solution"}] | [{"type":"physical unit","value":"4.73"}] | [{"type":"physical unit","value":"Molarity [OF] sulfuric acid solution [=] \\pu{1 × 10^(-5) M}"}] | <h1 class="questionTitle" itemprop="name">What is the pH of a #1*10^-5# #M# solution of sulfuric acid?</h1> | null | 4.73 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Sulphuric acid is diprotic, and it dissociates in two steps: </p>
<p><mathjax>#H_2SO_4 --> H^+ + HSO_4^- #</mathjax></p>
<p>This has equilibrium constant that is very large and can be assumed to be "total dissoc... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>I make it 4.73</p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Sulphuric acid is diprotic, and it dissociates in two steps: </p>
<p><mathj... | <article>
<h1 class="questionTitle" itemprop="name">What is the pH of a #1*10^-5# #M# solution of sulfuric acid?</h1>
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<span class="breadcrumb" itemprop="ti... | What is the pH of a #1*10^-5# #M# solution of sulfuric acid? | null |
234 | a8bfb4a4-6ddd-11ea-8cd0-ccda262736ce | https://socratic.org/questions/what-concentration-of-no-3-results-when-697-ml-of-0-515-m-nano-3-is-mixed-with-6 | 1.02 M | start physical_unit 3 3 concentration mol/l qc_end physical_unit 11 11 6 7 volume qc_end physical_unit 11 11 9 10 concentration qc_end physical_unit 20 20 15 16 volume qc_end physical_unit 20 20 18 19 concentration qc_end end | [{"type":"physical unit","value":"Concentration [OF] NO3- [IN] M"}] | [{"type":"physical unit","value":"1.02 M"}] | [{"type":"physical unit","value":"Volume [OF] NaNO3 [=] \\pu{697 mL}"},{"type":"physical unit","value":"Concentration [OF] NaNO3 [=] \\pu{0.515 M}"},{"type":"physical unit","value":"Volume [OF] Ca(NO3)2 [=] \\pu{635 mL}"},{"type":"physical unit","value":"Concentration [OF] Ca(NO3)2 [=] \\pu{0.785 M}"}] | <h1 class="questionTitle" itemprop="name">What concentration of #NO_3^(-)# results when 697 mL of 0.515 M #NaNO_3# is mixed with 635 mL of 0.785 M #Ca(NO_3)_2#?</h1> | null | 1.02 M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>As you know, <em>sodium nitrate</em>, <mathjax>#"NaNO"_3#</mathjax>, and <em>calcium nitrate</em>, <mathjax>#"Ca"("NO"_3)_2#</mathjax>, are both <strong>soluble</strong> in aqueous solution.</p>
<p>This means that ... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#["NO"_3^(-)] = "1.02 M"#</mathjax></p></div>
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<div class="markdown"><p>As you know, <em>sodium nitrate</em>, <mathja... | <article>
<h1 class="questionTitle" itemprop="name">What concentration of #NO_3^(-)# results when 697 mL of 0.515 M #NaNO_3# is mixed with 635 mL of 0.785 M #Ca(NO_3)_2#?</h1>
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<a href="/chemis... | What concentration of #NO_3^(-)# results when 697 mL of 0.515 M #NaNO_3# is mixed with 635 mL of 0.785 M #Ca(NO_3)_2#? | null |
235 | acab9265-6ddd-11ea-b95a-ccda262736ce | https://socratic.org/questions/9-50g-of-a-sample-of-hydrated-mgso4-are-heated-and-4-85g-of-h20-are-lost-how-wou | MgSO4.7H2O | start chemical_formula qc_end physical_unit 4 7 0 1 mass qc_end physical_unit 14 14 11 12 mass qc_end end | [{"type":"other","value":"Chemical Formula [OF] this hydrated salt [IN] empirical"}] | [{"type":"chemical equation","value":"MgSO4.7H2O"}] | [{"type":"physical unit","value":"Mass [OF] hydrated MgSO4 sample [=] \\pu{9.50 g}"},{"type":"physical unit","value":"Mass [OF] H2O [=] \\pu{4.85 g}"}] | <h1 class="questionTitle" itemprop="name">9.50g of a sample of hydrated MgSO4 are heated and 4.85g of H20 are lost, how would you calculate the empirical formula of this hydrated salt?
</h1> | null | MgSO4.7H2O | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>The idea here is that you will use the mass of evaporated water and the mass of the initial hydrated sample to find the formula of the hydrate, <mathjax>#"MgSO"_4 * color(blue)(n)"H"_2"O"#</mathjax>.</p>
<p>So, if ... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#"MgSO"_4 * 7"H"_2"O"#</mathjax></p></div>
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<div class="markdown"><p>The idea here is that you will use the mass of e... | <article>
<h1 class="questionTitle" itemprop="name">9.50g of a sample of hydrated MgSO4 are heated and 4.85g of H20 are lost, how would you calculate the empirical formula of this hydrated salt?
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<span itemscope="" itemtype="http://data-vocabulary.org/Brea... | 9.50g of a sample of hydrated MgSO4 are heated and 4.85g of H20 are lost, how would you calculate the empirical formula of this hydrated salt?
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236 | ac0ee146-6ddd-11ea-b068-ccda262736ce | https://socratic.org/questions/the-ka-value-of-a-weak-acid-ha-is-10-6-an-initial-solution-containing-1-0-m-of-h | 3.00 | start physical_unit 26 27 ph none qc_end physical_unit 7 7 9 9 ka qc_end physical_unit 7 7 14 15 molarity qc_end c_other Equilibrium qc_end end | [{"type":"physical unit","value":"pH [OF] final solution"}] | [{"type":"physical unit","value":"3.00"}] | [{"type":"physical unit","value":"Ka [OF] HA [=] \\pu{10^(-6)}"},{"type":"physical unit","value":"Molarity [OF] HA solution [=] \\pu{1.0 M}"},{"type":"other","value":"Equilibrium."}] | <h1 class="questionTitle" itemprop="name">The Ka value of a weak acid, HA, is 10-6. An initial solution containing 1.0 M of HA is prepared. What is the pH of the final solution at equilibrium?</h1> | null | 3.00 | <div class="answerDescription">
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<div class="markdown"><p>For a weak acid you can use the expression:</p>
<p><mathjax>#sf(pH=1/2[pK_a-log[acid])#</mathjax></p>
<p><mathjax>#:.#</mathjax><mathjax>#sf(pH=1/2[6-log(1)]#</mathjax></p>
<p><mathjax>#sf(pH=3)#</mathjax></p></div... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#sf(pH=3)#</mathjax></p></div>
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<div class="markdown"><p>For a weak acid you can use the expression:</p>
<p><mathjax>... | <article>
<h1 class="questionTitle" itemprop="name">The Ka value of a weak acid, HA, is 10-6. An initial solution containing 1.0 M of HA is prepared. What is the pH of the final solution at equilibrium?</h1>
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<span itemscope="" itemtype="http://data-vocabulary.o... | The Ka value of a weak acid, HA, is 10-6. An initial solution containing 1.0 M of HA is prepared. What is the pH of the final solution at equilibrium? | null |
237 | aa36fbdc-6ddd-11ea-bff9-ccda262736ce | https://socratic.org/questions/the-following-chemical-equation-is-not-balanced-fe-2o-3-h-2so-4-fe-2-so-4-3-h-2o | 3 | start physical_unit 27 28 coefficient none qc_end chemical_equation 7 13 qc_end end | [{"type":"physical unit","value":"Coefficient [OF] water molecule"}] | [{"type":"physical unit","value":"3"}] | [{"type":"chemical equation","value":"Fe2O3 + H2SO4 -> Fe2(SO4)3 + H2O"}] | <h1 class="questionTitle" itemprop="name">The following chemical equation is not balanced: #Fe_2O_3 + H_2SO_4 -> Fe_2(SO_4)_3 + H_2O#. When this chemical equation is correctly balanced, what is the coefficient of the water molecule? </h1> | null | 3 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>Water has a <mathjax>#3#</mathjax> coeeficient. Is the equation stoichiometrically balanced? If not, then it should be.</p>
<p>The oxide ion is dibasic, and reacts with 2 equiv <mathjax>#H^+#</mathjax> to give th... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#Fe_2O_3(s) + 3H_2SO_4(aq)rarrFe_2(SO_4)_3 + 3H_2O#</mathjax></p></div>
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<div class="markdown"><p>Water has a <mathja... | <article>
<h1 class="questionTitle" itemprop="name">The following chemical equation is not balanced: #Fe_2O_3 + H_2SO_4 -> Fe_2(SO_4)_3 + H_2O#. When this chemical equation is correctly balanced, what is the coefficient of the water molecule? </h1>
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<span it... | The following chemical equation is not balanced: #Fe_2O_3 + H_2SO_4 -> Fe_2(SO_4)_3 + H_2O#. When this chemical equation is correctly balanced, what is the coefficient of the water molecule? | null |
238 | a8b50b89-6ddd-11ea-b9ce-ccda262736ce | https://socratic.org/questions/what-is-the-volume-occupied-by-one-mole-of-helium-at-0-c-and-1-atm-pressure | 22.4 L | start physical_unit 9 9 volume l qc_end physical_unit 9 9 11 12 temperature qc_end physical_unit 9 9 14 15 pressure qc_end physical_unit 9 9 6 7 mole qc_end end | [{"type":"physical unit","value":"Volume [OF] helium [IN] L"}] | [{"type":"physical unit","value":"22.4 L"}] | [{"type":"physical unit","value":"Temperature [OF] helium [=] \\pu{0 ℃}"},{"type":"physical unit","value":"Pressure [OF] helium [=] \\pu{1 atm}"},{"type":"physical unit","value":"Mole [OF] helium [=] \\pu{1 mole}"}] | <h1 class="questionTitle" itemprop="name">What is the volume occupied by one mole of helium at 0 C and 1 atm pressure? </h1> | null | 22.4 L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The conditions for temperature and pressure provided to you actually correspond to the <em><strong>old</strong></em> definition of <strong>STP</strong> (Standard Pressure and Temperature).</p>
<p>Under these specif... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#"22.4 L"#</mathjax></p></div>
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<div class="markdown"><p>The conditions for temperature and pressure provided to you ... | <article>
<h1 class="questionTitle" itemprop="name">What is the volume occupied by one mole of helium at 0 C and 1 atm pressure? </h1>
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<span class="breadcr... | What is the volume occupied by one mole of helium at 0 C and 1 atm pressure? | null |
239 | a911d3da-6ddd-11ea-bf6b-ccda262736ce | https://socratic.org/questions/how-many-moles-of-water-are-in-0-34g-of-water | 0.02 moles | start physical_unit 4 4 mole mol qc_end physical_unit 4 4 7 8 mass qc_end end | [{"type":"physical unit","value":"Mole [OF] water [IN] moles"}] | [{"type":"physical unit","value":"0.02 moles"}] | [{"type":"physical unit","value":"Mass [OF] water [=] \\pu{0.34 g}"}] | <h1 class="questionTitle" itemprop="name">How many moles of water are in 0.34g of water? </h1> | null | 0.02 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>And thus, <mathjax>#(0.34*cancelg)/(18.01*cancelg*mol^-1)#</mathjax> <mathjax>#=#</mathjax> <mathjax>#(??)/(mol^-1)#</mathjax> <mathjax>#=#</mathjax> <mathjax>#??mol#</mathjax></p>
<p>Note that all I have done here... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#"Number of moles"#</mathjax> <mathjax>#=#</mathjax> <mathjax>#"Mass"/"Molar mass"#</mathjax> <mathjax>#~=#</mathjax> <mathjax>#0.02*mol#</mathjax></p></div>
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<h4 cla... | <article>
<h1 class="questionTitle" itemprop="name">How many moles of water are in 0.34g of water? </h1>
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<span class="breadcrumb" itemprop="title">Chemistr... | How many moles of water are in 0.34g of water? | null |
240 | a997ee10-6ddd-11ea-aa16-ccda262736ce | https://socratic.org/questions/a-sample-of-gas-has-a-mass-of-0-565-g-its-volume-is-117-ml-at-a-temperature-of-9 | 148.04 g/mol | start physical_unit 35 36 molar_mass g/mol qc_end physical_unit 1 3 8 9 mass qc_end physical_unit 1 3 13 14 volume qc_end physical_unit 1 3 19 20 temperature qc_end physical_unit 1 3 25 26 pressure qc_end end | [{"type":"physical unit","value":"Molar mass [OF] the gas [IN] g/mol"}] | [{"type":"physical unit","value":"148.04 g/mol"}] | [{"type":"physical unit","value":"Mass [OF] the gas sample [=] \\pu{0.565 g}"},{"type":"physical unit","value":"Volume [OF] the gas sample [=] \\pu{117 mL}"},{"type":"physical unit","value":"Temperature [OF] the gas sample [=] \\pu{95 ℃}"},{"type":"physical unit","value":"Pressure [OF] the gas sample [=] \\pu{749 mmHg}... | <h1 class="questionTitle" itemprop="name">A sample of gas has a mass of 0.565 g. Its volume is 117 mL at a temperature of 95 C and a pressure of 749 mm Hg. How would you find the molar mass of the gas?</h1> | null | 148.04 g/mol | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>From the Ideal Gas equation, <mathjax>#n=(PV)/(RT)#</mathjax>, where, <mathjax>#n="Mass"/"Molar mass"#</mathjax>.</p>
<p>And thus <mathjax>#"Molar mass "=("Mass"xxRT)/(PV)#</mathjax></p>
<p><mathjax>#=(0.565*gxx0.0... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#"Molar mass"#</mathjax> <mathjax>#~=#</mathjax> <mathjax>#150*g*mol^-1#</mathjax>.</p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown">... | <article>
<h1 class="questionTitle" itemprop="name">A sample of gas has a mass of 0.565 g. Its volume is 117 mL at a temperature of 95 C and a pressure of 749 mm Hg. How would you find the molar mass of the gas?</h1>
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<span itemscope="" itemtype="http://data-vo... | A sample of gas has a mass of 0.565 g. Its volume is 117 mL at a temperature of 95 C and a pressure of 749 mm Hg. How would you find the molar mass of the gas? | null |
241 | ad1b8dce-6ddd-11ea-a158-ccda262736ce | https://socratic.org/questions/574079387c01494d69bb1a62 | 8.48 moles | start physical_unit 3 3 mole mol qc_end physical_unit 10 10 8 9 mole qc_end chemical_equation 11 17 qc_end end | [{"type":"physical unit","value":"Mole [OF] Ag2O [IN] moles"}] | [{"type":"physical unit","value":"8.48 moles"}] | [{"type":"physical unit","value":"Mole [OF] O2 [=] \\pu{4.24 mol}"},{"type":"chemical equation","value":"2 Ag2O -> 4 Ag + O2"}] | <h1 class="questionTitle" itemprop="name">How many moles #"Ag"_2"O"# are needed to produce #"4.24 mol O"_2"#?</h1> | <div class="questionDetailsContainer">
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<div class="markdown"><p><mathjax>#"2Ag"_2"O"#</mathjax><mathjax>#rarr#</mathjax><mathjax>#"4Ag + O"_2"#</mathjax></p></div>
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</div> | 8.48 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p><strong>Balanced Equation</strong></p>
<p><mathjax>#"2Ag"_2"O"#</mathjax><mathjax>#rarr#</mathjax><mathjax>#"4Ag"+"O"_2"#</mathjax></p>
<p>Multiply the given moles of <mathjax>#"O"_2"#</mathjax> times <a href="http... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#"8.50 mol Ag"_2"O"#</mathjax> are needed to produce <mathjax>#"4.25 mol O"_2"#</mathjax>.</p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="mar... | <article>
<h1 class="questionTitle" itemprop="name">How many moles #"Ag"_2"O"# are needed to produce #"4.24 mol O"_2"#?</h1>
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<div class="markdown"><p><mathjax>#"2Ag"_2"O"#</mathjax><mathjax>#rarr#<... | How many moles #"Ag"_2"O"# are needed to produce #"4.24 mol O"_2"#? |
#"2Ag"_2"O"##rarr##"4Ag + O"_2"#
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242 | aca33a68-6ddd-11ea-be1c-ccda262736ce | https://socratic.org/questions/according-to-this-reaction-2al-6hbr-2albr-3-3h-2-if-4-moles-of-al-reacts-with-8- | 6.00 mioles | start physical_unit 14 14 mole mol qc_end physical_unit 5 5 16 17 mole qc_end physical_unit 8 8 22 23 mole qc_end chemical_equation 4 14 qc_end end | [{"type":"physical unit","value":"Mole [OF] H2 [IN] moles"}] | [{"type":"physical unit","value":"6.00 mioles"}] | [{"type":"physical unit","value":"Mole [OF] Al [=] \\pu{4 moles}"},{"type":"physical unit","value":"Mole [OF] HBr [=] \\pu{8 moles}"},{"type":"chemical equation","value":"2 Al + 6 HBr -> 2 AlBr3 + 3 H2"}] | <h1 class="questionTitle" itemprop="name">According to this reaction: #2Al+6HBr -> 2AlBr_3 + 3H_2#
If 4 moles of #Al# react with 8 moles of #HBr#, how many moles of #H_2# are formed?</h1> | null | 6.00 mioles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p><mathjax>#2Al(s) + 6HBr(aq) rarr 2AlBr_3(aq) + 3H_2(g)uarr#</mathjax></p>
<p>You have the chemical equation, it tells you EXPLICITLY, that 2 moles of aluminum metal give 3 moles of dihydrogen gas upon reaction. Yo... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#6#</mathjax> <mathjax>#"moles"#</mathjax> of <mathjax>#H_2(g)#</mathjax> are formed. </p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdo... | <article>
<h1 class="questionTitle" itemprop="name">According to this reaction: #2Al+6HBr -> 2AlBr_3 + 3H_2#
If 4 moles of #Al# react with 8 moles of #HBr#, how many moles of #H_2# are formed?</h1>
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<span itemscope="" itemtype="http://data-vocabulary.org/Brea... | According to this reaction: #2Al+6HBr -> 2AlBr_3 + 3H_2#
If 4 moles of #Al# react with 8 moles of #HBr#, how many moles of #H_2# are formed? | null |
243 | a8d40030-6ddd-11ea-9a48-ccda262736ce | https://socratic.org/questions/calculate-the-heat-required-to-raise-the-temperature-of-2-0-kg-of-ice-at-25-c-to | 4.0 × 10^5 J | start physical_unit 12 12 heat_energy j qc_end physical_unit 12 12 9 10 mass qc_end physical_unit 12 12 14 15 temperature qc_end physical_unit 12 12 17 18 temperature qc_end end | [{"type":"physical unit","value":"Required heat [OF] ice [IN] J"}] | [{"type":"physical unit","value":"4.0 × 10^5 J"}] | [{"type":"physical unit","value":"Temperature1 [OF] ice [=] \\pu{-25 ℃}"},{"type":"physical unit","value":"Temperature2 [OF] ice [=] \\pu{70 ℃}"},{"type":"physical unit","value":"Mass [OF] ice [=] \\pu{2.0 kg}"}] | <h1 class="questionTitle" itemprop="name">Calculate the heat required to raise the temperature of 2.0 kg of ice at -25˚C to 70.˚C? </h1> | <div class="questionDetailsContainer">
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<div class="markdown"><p>(I keep on getting a value of <mathjax>#4.0 * 10^5#</mathjax> but the answer key says, <mathjax>#1.4 * 10^6 J#</mathjax>.</p></div>
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</div> | 4.0 × 10^5 J | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#q = mC_sDeltaT#</mathjax></p>
<p><mathjax>#q = (2.0*10^3g) * (2.06J/(g*°C)) * 95°C#</mathjax><br/>
<mathjax>#q = 4.0*10^5J#</mathjax></p>
<p><mathjax>#1.4*10^6J = (2.0*10^3g) * C_s * 95°C#</mathjax></p>
<... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#q = 4.0*10^5J#</mathjax></p>
<p>I have a feeling you're right.</p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p><mathjax>#q = mC_... | <article>
<h1 class="questionTitle" itemprop="name">Calculate the heat required to raise the temperature of 2.0 kg of ice at -25˚C to 70.˚C? </h1>
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<div class="markdown"><p>(I keep on getting a valu... | Calculate the heat required to raise the temperature of 2.0 kg of ice at -25˚C to 70.˚C? |
(I keep on getting a value of #4.0 * 10^5# but the answer key says, #1.4 * 10^6 J#.
|
244 | a8a6d289-6ddd-11ea-88d4-ccda262736ce | https://socratic.org/questions/what-is-the-formula-of-the-compound-formed-when-ammonium-ions-nh-4-and-phosphate | (NH4)3PO4 | start chemical_formula qc_end chemical_equation 11 11 qc_end chemical_equation 15 15 qc_end end | [{"type":"other","value":"Chemical Formula [OF] the compound [IN] default"}] | [{"type":"chemical equation","value":"(NH4)3PO4"}] | [{"type":"chemical equation","value":"NH4+"},{"type":"chemical equation","value":"PO4^(3-)"}] | <h1 class="questionTitle" itemprop="name">What is the formula of the compound formed when ammonium ions, #NH_4 ^+#, and phosphate ions, #PO_4^(3-)# combine?</h1> | null | (NH4)3PO4 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>This is because <mathjax>#NH_4^(+)#</mathjax> has a charge of 1+, and <mathjax>#PO_4^(3-)#</mathjax> has a charge of 3-. The compound should have a neutral charge, so it takes three <mathjax>#NH_4^+#</mathjax> to b... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#(NH_4)_3PO_4#</mathjax></p></div>
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<div class="markdown"><p>This is because <mathjax>#NH_4^(+)#</mathjax> has a char... | <article>
<h1 class="questionTitle" itemprop="name">What is the formula of the compound formed when ammonium ions, #NH_4 ^+#, and phosphate ions, #PO_4^(3-)# combine?</h1>
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<a href="/chemistry"... | What is the formula of the compound formed when ammonium ions, #NH_4 ^+#, and phosphate ions, #PO_4^(3-)# combine? | null |
245 | ac894f13-6ddd-11ea-918c-ccda262736ce | https://socratic.org/questions/5906c120b72cff522389b12c | 3 Ca^2+ + 2 PO4^3- -> Ca3(PO4)2(s) | start chemical_equation qc_end substance 2 3 qc_end substance 5 6 qc_end substance 9 9 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the equation"}] | [{"type":"chemical equation","value":"3 Ca^2+ + 2 PO4^3- -> Ca3(PO4)2(s)"}] | [{"type":"substance name","value":"Calcium ion"},{"type":"substance name","value":"Phosphate ion"},{"type":"substance name","value":"Water"}] | <h1 class="questionTitle" itemprop="name">How do calcium ion and phosphate ion react in water?</h1> | null | 3 Ca^2+ + 2 PO4^3- -> Ca3(PO4)2(s) | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Phosphates are usually as soluble as a brick, and all except the alkali metal salts come a crashing out of solution. In fact, the phosphate species in aqueous solution is probably, <mathjax>#HPO_4^(2-)#</mathjax>,... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#3Ca^(2+) + 2PO_4^(3-) rarr Ca_3(PO_4)_2(s)darr#</mathjax></p></div>
</div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Phosphates are usually... | <article>
<h1 class="questionTitle" itemprop="name">How do calcium ion and phosphate ion react in water?</h1>
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<span class="breadcrumb" itemprop="title">Che... | How do calcium ion and phosphate ion react in water? | null |
246 | ab168c00-6ddd-11ea-a89a-ccda262736ce | https://socratic.org/questions/599c35a87c01495b806fba3e | 90 | start physical_unit 6 7 equilibrium_constant_k none qc_end chemical_equation 8 13 qc_end end | [{"type":"physical unit","value":"Equilibrium constant [OF] the reaction"}] | [{"type":"physical unit","value":"90"}] | [{"type":"chemical equation","value":"2 CH2Cl2(g) <=> CH4(g) + CCl4(g)"},{"type":"physical unit","value":"[CH2Cl2] [OF] solution [=] \\pu{0.021 M}"},{"type":"physical unit","value":"[CH4] [OF] solution [=] \\pu{0.2 M}"},{"type":"physical unit","value":"[CCl4] [OF] solution [=] \\pu{0.2 M}"}] | <h1 class="questionTitle" itemprop="name">What is the equilibrium constant for the reaction #2"CH"_ 2"Cl" _ (2(g)) rightleftharpoons "CH"_ (4(g)) + "CCl"_ (4(g))# ?</h1> | <div class="questionDetailsContainer">
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<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p>Given that, at equilibrium, the vessel contains: </p>
<p><mathjax>#["CH"_2"Cl"_2] = "0.021 M"#</mathjax><br/>
<mathjax>#["CH"_4] = "0.2 M"#</mathjax><br/>
<mathjax>#["CCl"_... | 90 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The equilibrium reaction given to you looks like this</p>
<blockquote>
<p><mathjax>#2"CH"_ 2"Cl" _ (2(g)) rightleftharpoons "CH"_ (4(g)) + "CCl"_ (4(g))#</mathjax></p>
</blockquote>
<p>Now, the equilibrium constant... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#K_c = 90#</mathjax></p></div>
</div>
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<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The equilibrium reaction given to you looks like this</p>
<b... | <article>
<h1 class="questionTitle" itemprop="name">What is the equilibrium constant for the reaction #2"CH"_ 2"Cl" _ (2(g)) rightleftharpoons "CH"_ (4(g)) + "CCl"_ (4(g))# ?</h1>
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<div class="markd... | What is the equilibrium constant for the reaction #2"CH"_ 2"Cl" _ (2(g)) rightleftharpoons "CH"_ (4(g)) + "CCl"_ (4(g))# ? |
Given that, at equilibrium, the vessel contains:
#["CH"_2"Cl"_2] = "0.021 M"#
#["CH"_4] = "0.2 M"#
#["CCl"_4] = "0.2 M"#
|
247 | ab3c96ed-6ddd-11ea-8b4f-ccda262736ce | https://socratic.org/questions/how-many-moles-of-solute-are-contained-in-200-milliliters-of-a-1-m-solution | 0.20 moles | start physical_unit 4 4 mole mol qc_end physical_unit 14 14 8 9 volume qc_end physical_unit 14 14 12 13 molarity qc_end end | [{"type":"physical unit","value":"Mole [OF] solute [IN] moles"}] | [{"type":"physical unit","value":"0.20 moles"}] | [{"type":"physical unit","value":"Volume [OF] solution [=] \\pu{200 milliliters}"},{"type":"physical unit","value":"Molarity [OF] solution [=] \\pu{1 M}"}] | <h1 class="questionTitle" itemprop="name">How many moles of solute are contained in 200 milliliters of a 1 M solution?</h1> | null | 0.20 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#"Concentration"#</mathjax> <mathjax>#=#</mathjax> <mathjax>#"Moles of solute"/"Volume of solution"#</mathjax>.</p>
<p>Typically, we perform the calculation: <mathjax>#C=n/V#</mathjax>, where <mathjax>#n#<... | <div class="answerText" itemprop="text">
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<div class="markdown"><p>Such a volume contains <mathjax>#0.200#</mathjax> <mathjax>#mol#</mathjax> of <a href="https://socratic.org/chemistry/solutions-and-their-behavior/solute">solute</a>.</p></div>
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<div class="answerDescription... | <article>
<h1 class="questionTitle" itemprop="name">How many moles of solute are contained in 200 milliliters of a 1 M solution?</h1>
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<span class="breadcru... | How many moles of solute are contained in 200 milliliters of a 1 M solution? | null |
248 | ab64f058-6ddd-11ea-90aa-ccda262736ce | https://socratic.org/questions/56edba7f11ef6b5cfb709278 | +2 | start physical_unit 2 3 oxidation_number none qc_end chemical_equation 10 10 qc_end end | [{"type":"physical unit","value":"Oxidation number [OF] the metal"}] | [{"type":"physical unit","value":"+2"}] | [{"type":"chemical equation","value":"[Zn(OH)4]^2-"}] | <h1 class="questionTitle" itemprop="name">What is the metal oxidation number in the complex ion, #[Zn(OH)_4]^(2-)#?</h1> | null | +2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>How do we know this? Well, look at its formation reaction:</p>
<p><mathjax>#Zn^(2+) + 4HO^(-) rarr [Zn(OH)_4]^(2-)#</mathjax></p>
<p>Charge and mass are conserved, as in every chemical equation. The <mathjax>#[Zn... | <div class="answerText" itemprop="text">
<div class="answerSummary">
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<div class="markdown"><p><mathjax>#Zn(OH)_4^(2-)#</mathjax> is a complex ion in which the oxidation number of <mathjax>#Zn#</mathjax> is <mathjax>#+II#</mathjax>. <a href="http://socratic.org/chemistry/electrochemistry/oxidation-numbers">Oxidat... | <article>
<h1 class="questionTitle" itemprop="name">What is the metal oxidation number in the complex ion, #[Zn(OH)_4]^(2-)#?</h1>
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<span class="breadcrumb"... | What is the metal oxidation number in the complex ion, #[Zn(OH)_4]^(2-)#? | null |
249 | a9338f30-6ddd-11ea-88b1-ccda262736ce | https://socratic.org/questions/q-i-how-many-moles-of-sulphur-will-be-produced-when-2-moles-of-h2s-reacts-with-1 | 0.19 moles | start physical_unit 4 4 mole mol qc_end physical_unit 12 12 9 10 mole qc_end physical_unit 18 18 15 16 volume qc_end c_other NTP qc_end end | [{"type":"physical unit","value":"Mole [OF] sulphur [IN] moles"}] | [{"type":"physical unit","value":"0.19 moles"}] | [{"type":"physical unit","value":"Mole [OF] H2S [=] \\pu{2 moles}"},{"type":"physical unit","value":"Volume [OF] SO2 [=] \\pu{11.2 L}"},{"type":"other","value":"NTP"}] | <h1 class="questionTitle" itemprop="name">Q.)(i) How many moles of sulphur will be produced when 2 moles of H2S reacts with 11.2L of SO2at NTP?</h1> | null | 0.19 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The sulfide in <mathjax>#"hydrogen sulfide"#</mathjax> is OXIDIZED <mathjax>#(i)#</mathjax> to elemental sulfur, and the <mathjax>#"sulfur dioxide"#</mathjax> is REDUCED to elemental sulfur......<mathjax>#(ii)#</ma... | <div class="answerText" itemprop="text">
<div class="answerSummary">
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<div class="markdown"><p>I think you refer to the so-called <mathjax>#"comproportionation reaction"#</mathjax>....</p></div>
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</div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>... | <article>
<h1 class="questionTitle" itemprop="name">Q.)(i) How many moles of sulphur will be produced when 2 moles of H2S reacts with 11.2L of SO2at NTP?</h1>
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<a href="/chemistry" itemprop="ur... | Q.)(i) How many moles of sulphur will be produced when 2 moles of H2S reacts with 11.2L of SO2at NTP? | null |
250 | ac9a3556-6ddd-11ea-a0b6-ccda262736ce | https://socratic.org/questions/how-would-you-balance-the-following-equation-s-hno3-h2so4-no2-h2o | S + 6 HNO3 -> H2SO4 + 6 NO2 + 2 H2O | start chemical_equation qc_end chemical_equation 7 15 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the equation"}] | [{"type":"chemical equation","value":"S + 6 HNO3 -> H2SO4 + 6 NO2 + 2 H2O"}] | [{"type":"chemical equation","value":"S + HNO3 -> H2SO4 + NO2 + H2O"}] | <h1 class="questionTitle" itemprop="name">How would you balance the following equation:
#"S" + "HNO"_3 -> "H"_2"SO"_4 + "NO"_2 + "H"_2"O"# ?</h1> | null | S + 6 HNO3 -> H2SO4 + 6 NO2 + 2 H2O | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Use the standard method for <strong>redox reactions</strong>.</p>
<p>Oxidation:</p>
<p>Sulfur goes from 0 oxidation state in the element to +6 in sulfuric acid, so it gives off six (moles of) electrons per (mole of... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>By the standard method for <a href="https://socratic.org/chemistry/chemical-reactions/redox-reactions">redox reactions</a> we get:</p>
<p><mathjax>#"S"+6"HNO"_3 \rarr "H"_2"SO"_4+6"NO"_2+2"H"_2"O"#</mathjax></p></div>
</... | <article>
<h1 class="questionTitle" itemprop="name">How would you balance the following equation:
#"S" + "HNO"_3 -> "H"_2"SO"_4 + "NO"_2 + "H"_2"O"# ?</h1>
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<a href="/chemistry" itemprop="ur... | How would you balance the following equation:
#"S" + "HNO"_3 -> "H"_2"SO"_4 + "NO"_2 + "H"_2"O"# ? | null |
251 | a9d0f915-6ddd-11ea-a766-ccda262736ce | https://socratic.org/questions/how-many-nitrogen-molecules-are-in-2-4-moles-of-n-2 | 1.44 × 10^24 | start physical_unit 2 3 number none qc_end physical_unit 9 9 6 7 mole qc_end end | [{"type":"physical unit","value":"Number [OF] nitrogen molecules"}] | [{"type":"physical unit","value":"1.44 × 10^24"}] | [{"type":"physical unit","value":"Mole [OF] N2 [=] \\pu{2.4 moles}"}] | <h1 class="questionTitle" itemprop="name">How many nitrogen molecules are in 2.4 moles of #N_2#?</h1> | null | 1.44 × 10^24 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Using Avogadro's constant of 1 mole is equal to <mathjax>#6.02810^23#</mathjax>molecules, we can convert moles to molecules. </p>
<p><mathjax>#2.4 mol N_2 * (6.02810^23 mlcsN_2)/(1 mol N_2)#</mathjax></p>
<p><mathj... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#1.44*10^24#</mathjax>molecules<mathjax>#N_2#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Using Avogadro's constant... | <article>
<h1 class="questionTitle" itemprop="name">How many nitrogen molecules are in 2.4 moles of #N_2#?</h1>
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252 | ab666014-6ddd-11ea-b98b-ccda262736ce | https://socratic.org/questions/560648e711ef6b340e584d26 | 1.81 × 10^21 | start physical_unit 2 3 number none qc_end physical_unit 12 13 7 8 volume qc_end physical_unit 12 13 10 11 molarity qc_end end | [{"type":"physical unit","value":"Number [OF] OH- ions"}] | [{"type":"physical unit","value":"1.81 × 10^21"}] | [{"type":"physical unit","value":"Volume [OF] Ba(OH)2 solution [=] \\pu{5.0 mL}"},{"type":"physical unit","value":"Molarity [OF] Ba(OH)2 solution [=] \\pu{0.3 M}"}] | <h1 class="questionTitle" itemprop="name">How many #sf(OH^-)# ions are present in 5.0 ml of 0.3M #sf(Ba(OH)_2)# solution ?</h1> | null | 1.81 × 10^21 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>1 mole barium hydroxide produces 2 moles hydroxide ions:</p>
<p><mathjax>#rarrBa_((aq))^(2+)+2OH_((aq))^-#</mathjax></p>
<p><mathjax>#c=n/v#</mathjax></p>
<p><mathjax>#n=cxxv#</mathjax></p>
<p>so no. moles <mathjax... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#1.8xx10^21#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>1 mole barium hydroxide produces 2 moles hydroxide ions:</... | <article>
<h1 class="questionTitle" itemprop="name">How many #sf(OH^-)# ions are present in 5.0 ml of 0.3M #sf(Ba(OH)_2)# solution ?</h1>
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<span class="brea... | How many #sf(OH^-)# ions are present in 5.0 ml of 0.3M #sf(Ba(OH)_2)# solution ? | null |
253 | ac3a9074-6ddd-11ea-bf18-ccda262736ce | https://socratic.org/questions/what-is-the-hydrogen-ion-concentration-of-a-solution-with-ph-3-75 | 10^(-3.75) M | start physical_unit 3 4 concentration mol/l qc_end physical_unit 8 8 12 12 ph qc_end end | [{"type":"physical unit","value":"Concentration [OF] hydrogen ion [IN] M"}] | [{"type":"physical unit","value":"10^(-3.75) M"}] | [{"type":"physical unit","value":"pH [OF] the solution [=] \\pu{3.75}"}] | <h1 class="questionTitle" itemprop="name">What is the hydrogen ion concentration of a solution with pH = 3.75?</h1> | null | 10^(-3.75) M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#pH#</mathjax> <mathjax>#=#</mathjax> <mathjax>#-log_10[H_3O^+]#</mathjax> by definition.</p>
<p>So we take antilogs, <mathjax>#[H_3O^+] = 10^(-3.75)#</mathjax> <mathjax>#=#</mathjax> <mathjax>#??#</mathja... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#[H_3O^+]#</mathjax> <mathjax>#=#</mathjax> <mathjax>#10^(-3.75)*mol*L^-1#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"... | <article>
<h1 class="questionTitle" itemprop="name">What is the hydrogen ion concentration of a solution with pH = 3.75?</h1>
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<span class="breadcrumb" item... | What is the hydrogen ion concentration of a solution with pH = 3.75? | null |
254 | a8a72a34-6ddd-11ea-8a99-ccda262736ce | https://socratic.org/questions/how-many-moles-of-s-are-in-25-g-of-s | 0.78 moles | start physical_unit 4 4 mole mol qc_end physical_unit 4 4 7 8 mass qc_end end | [{"type":"physical unit","value":"Mole [OF] S [IN] moles"}] | [{"type":"physical unit","value":"0.78 moles"}] | [{"type":"physical unit","value":"Mass [OF] S [=] \\pu{25 g}"}] | <h1 class="questionTitle" itemprop="name">How many moles of #S# are in 25 g of #S#?</h1> | null | 0.78 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>From <a href="https://socratic.org/chemistry/the-periodic-table/the-periodic-table">the periodic table</a>, the <a href="https://socratic.org/chemistry/a-first-introduction-to-matter/atomic-mass-and-isotope-abundan... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>0.78 mols</p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>From <a href="https://socratic.org/chemistry/the-periodic-table/the-periodic-tab... | <article>
<h1 class="questionTitle" itemprop="name">How many moles of #S# are in 25 g of #S#?</h1>
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255 | aae78aa6-6ddd-11ea-964d-ccda262736ce | https://socratic.org/questions/how-many-calories-are-absorbed-by-a-pot-of-water-with-a-mass-of-500-g-in-order-t | 5000 calories | start physical_unit 9 9 heat_energy cal qc_end physical_unit 9 9 14 15 mass qc_end physical_unit 9 9 23 24 temperature qc_end physical_unit 9 9 26 27 temperature qc_end end | [{"type":"physical unit","value":"Absorbed energy [OF] water [IN] calories"}] | [{"type":"physical unit","value":"5000 calories"}] | [{"type":"physical unit","value":"Mass [OF] water [=] \\pu{500 g}"},{"type":"physical unit","value":"Temperature1 [OF] water [=] \\pu{20 ℃}"},{"type":"physical unit","value":"Temperature2 [OF] water [=] \\pu{30 ℃}"}] | <h1 class="questionTitle" itemprop="name">How many calories are absorbed by a pot of water with a mass of 500 g in order to raise the temperature from 20° C to 30° C?</h1> | null | 5000 calories | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>I assume that the pot itself absorbs no heat.</p>
<p>The formula for the heat absorbed by the water is</p>
<p><mathjax>#q = mcΔt#</mathjax>, where</p>
<p><mathjax>#m = "500 g"#</mathjax><b... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The water absorbs 5000 cal.</p></div>
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</div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p>I assume that the pot itself absorbs... | <article>
<h1 class="questionTitle" itemprop="name">How many calories are absorbed by a pot of water with a mass of 500 g in order to raise the temperature from 20° C to 30° C?</h1>
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<a href="/... | How many calories are absorbed by a pot of water with a mass of 500 g in order to raise the temperature from 20° C to 30° C? | null |
256 | abcc2c4f-6ddd-11ea-9a10-ccda262736ce | https://socratic.org/questions/570d40a87c014941f945b1d0 | 3.08 × 10^(-14) M | start physical_unit 5 6 concentration mol/l qc_end physical_unit 10 11 16 17 [h3o+] qc_end physical_unit 10 11 21 22 kw qc_end end | [{"type":"physical unit","value":"Concentration [OF] hydroxide anions [IN] M"}] | [{"type":"physical unit","value":"3.08 × 10^(-14) M"}] | [{"type":"physical unit","value":"[H3O+] [OF] the aqueous solution [=] \\pu{0.325 M}"},{"type":"physical unit","value":"Kw [OF] the aqueous solution [=] \\pu{10^(-14) mol^2L^2}"}] | <h1 class="questionTitle" itemprop="name">What would the concentration of hydroxide anions be in an aqueous solution that has #["H"_3"O"^(+)] = "0.325 M"# ? Given: #K_w = 10^(-14)# #"mol"^2"L"^2#</h1> | null | 3.08 × 10^(-14) M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>At <mathjax>#25^@"C"#</mathjax> the ionic product of water is given by:</p>
<p><mathjax>#K_w=[H_3O_((aq))^(+)][OH_((aq))^(-)]=10^(-14)" ""mol"^(2)."l"^(-2)#</mathjax></p>
<p><mathjax>#:.[OH_((aq))^(-)]=K_w/[[H_3O_(... | <div class="answerText" itemprop="text">
<div class="answerSummary">
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<div class="markdown"><p><mathjax>#3.08xx10^(-14)" ""mol""/""l"#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>At <mathjax>#25^@"C"#</mathjax> the ioni... | <article>
<h1 class="questionTitle" itemprop="name">What would the concentration of hydroxide anions be in an aqueous solution that has #["H"_3"O"^(+)] = "0.325 M"# ? Given: #K_w = 10^(-14)# #"mol"^2"L"^2#</h1>
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<span itemscope="" itemtype="http://data-vocabular... | What would the concentration of hydroxide anions be in an aqueous solution that has #["H"_3"O"^(+)] = "0.325 M"# ? Given: #K_w = 10^(-14)# #"mol"^2"L"^2# | null |
257 | aa175fdb-6ddd-11ea-88c7-ccda262736ce | https://socratic.org/questions/what-is-the-formula-for-mercury-ii-nitride | Hg3N2 | start chemical_formula qc_end substance 5 7 qc_end end | [{"type":"other","value":"Chemical Formula [OF] mercury (II) nitride [IN] default"}] | [{"type":"chemical equation","value":"Hg3N2"}] | [{"type":"substance name","value":"Mercury (II) nitride"}] | <h1 class="questionTitle" itemprop="name">What is the formula for mercury (II) nitride? </h1> | null | Hg3N2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>With <mathjax>#Hg^(2+)#</mathjax> it forms the <mathjax>#Hg_3N_2#</mathjax> salt, <mathjax>#"mercuric nitride"#</mathjax>. </p></div>
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</div> | <div class="answerText" itemprop="text">
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<div class="markdown"><p>Nitrogen may be reduced to the <mathjax>#"nitride anion, "N^(3-)#</mathjax>, so.....</p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>With ... | <article>
<h1 class="questionTitle" itemprop="name">What is the formula for mercury (II) nitride? </h1>
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<span class="breadcrumb" itemprop="title">Chemistry... | What is the formula for mercury (II) nitride? | null |
258 | a95701c6-6ddd-11ea-a6d8-ccda262736ce | https://socratic.org/questions/what-is-the-formula-for-nickel-ii-phosphate | Ni3(PO4)2 | start chemical_formula qc_end substance 5 7 qc_end end | [{"type":"other","value":"Chemical Formula [OF] nickel (II) phosphate [IN] default"}] | [{"type":"chemical equation","value":"Ni3(PO4)2"}] | [{"type":"substance name","value":"Nickel (II) phosphate"}] | <h1 class="questionTitle" itemprop="name">What is the formula for nickel (II) phosphate?</h1> | null | Ni3(PO4)2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>From aqueous solution, we are more likely to isolate...</p>
<p><mathjax>#Ni(HPO_4)(s)#</mathjax>...i.e. <mathjax>#"nickel biphosphate…."#</mathjax> </p></div>
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</div> | <div class="answerText" itemprop="text">
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<div class="markdown"><p>Well, <mathjax>#Ni_3(PO_4)_2#</mathjax>....</p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>From aqueous solution, we are more likely to i... | <article>
<h1 class="questionTitle" itemprop="name">What is the formula for nickel (II) phosphate?</h1>
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<span class="breadcrumb" itemprop="title">Chemistry... | What is the formula for nickel (II) phosphate? | null |
259 | a90e035c-6ddd-11ea-84b4-ccda262736ce | https://socratic.org/questions/the-pressure-acting-on-60-cubic-meters-of-gas-is-raised-from-236-kpa-to-354-kpa- | 40 cubic meters | start physical_unit 26 27 volume m^3 qc_end physical_unit 26 27 4 6 volume qc_end physical_unit 26 27 12 13 pressure qc_end physical_unit 26 27 15 16 pressure qc_end c_other constant_temperature qc_end end | [{"type":"physical unit","value":"Volume2 [OF] the gas [IN] cubic meters"}] | [{"type":"physical unit","value":"40 cubic meters"}] | [{"type":"physical unit","value":"Volume1 [OF] the gas [=] \\pu{60 cubic meters}"},{"type":"physical unit","value":"Pressure1 [OF] the gas [=] \\pu{236 kPa}"},{"type":"physical unit","value":"Pressure2 [OF] the gas [=] \\pu{354 kPa}"},{"type":"other","value":"ConstantTemperature"}] | <h1 class="questionTitle" itemprop="name">The pressure acting on 60 cubic meters of gas is raised from 236 kPa to 354 kPa. The temperature is kept constant. What new volume does the gas occupy?</h1> | null | 40 cubic meters | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><a href="http://socratic.org/chemistry/the-behavior-of-gases/boyle-s-law">Boyle's Law</a> states that the volume of an enclosed gas is inversely proportional tot he pressure exerted on it, provided the temperature ... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#40m^3#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p><a href="http://socratic.org/chemistry/the-behavior-of-gases/bo... | <article>
<h1 class="questionTitle" itemprop="name">The pressure acting on 60 cubic meters of gas is raised from 236 kPa to 354 kPa. The temperature is kept constant. What new volume does the gas occupy?</h1>
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<span itemscope="" itemtype="http://data-vocabulary.... | The pressure acting on 60 cubic meters of gas is raised from 236 kPa to 354 kPa. The temperature is kept constant. What new volume does the gas occupy? | null |
260 | ac5e3ce4-6ddd-11ea-9f38-ccda262736ce | https://socratic.org/questions/if-1-35-g-of-aluminum-is-mixed-with-6-0-moles-of-copper-ii-chloride-what-mass-of | 4.77 g | start physical_unit 11 11 mass g qc_end physical_unit 4 4 1 2 mass qc_end physical_unit 11 13 8 9 mole qc_end end | [{"type":"physical unit","value":"Mass [OF] copper [IN] g"}] | [{"type":"physical unit","value":"4.77 g"}] | [{"type":"physical unit","value":"Mass [OF] aluminum [=] \\pu{1.35 g}"},{"type":"physical unit","value":"Mole [OF] copper (II) chloride [=] \\pu{6.0 moles}"}] | <h1 class="questionTitle" itemprop="name">If 1.35 g of aluminum is mixed with 6.0 moles of copper (II) chloride, what mass of copper would be produced?</h1> | null | 4.77 g | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Start with a balanced equation.</p>
<p><mathjax>#"2Al + 3CuCl"_2#</mathjax><mathjax>#rarr#</mathjax><mathjax>#"2AlCl"_3 + "3Cu"#</mathjax></p>
<p>Convert <mathjax>#"1.35 g Al"#</mathjax> to moles by dividing by its... | <div class="answerText" itemprop="text">
<div class="answerSummary">
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<div class="markdown"><p>Since aluminum is the limiting reactant, so the reaction will produce <mathjax>#"4.77 g Cu"#</mathjax>.</p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class=... | <article>
<h1 class="questionTitle" itemprop="name">If 1.35 g of aluminum is mixed with 6.0 moles of copper (II) chloride, what mass of copper would be produced?</h1>
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<a href="/chemistry" item... | If 1.35 g of aluminum is mixed with 6.0 moles of copper (II) chloride, what mass of copper would be produced? | null |
261 | ac9615e6-6ddd-11ea-862d-ccda262736ce | https://socratic.org/questions/how-would-you-balance-na-h2o-naoh-h2 | 2 Na + 2 H2O -> 2 NaOH + H2 | start chemical_equation qc_end chemical_equation 4 10 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the equation"}] | [{"type":"chemical equation","value":"2 Na + 2 H2O -> 2 NaOH + H2"}] | [{"type":"chemical equation","value":"Na + H2O -> NaOH + H2"}] | <h1 class="questionTitle" itemprop="name">How would you balance: Na + H2O --> NaOH + H2?
</h1> | null | 2 Na + 2 H2O -> 2 NaOH + H2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>You have to count the number of atoms in both sides of the reaction to be equal, to make it a little easier you can make a list. So in the equation <mathjax>#Na+H_2O->NaOH+H_2#</mathjax>, there are<br/>
<mathjax... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#2Na + 2H_2O -> 2NaOH +H_2#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>You have to count the number of atoms in... | <article>
<h1 class="questionTitle" itemprop="name">How would you balance: Na + H2O --> NaOH + H2?
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<span class="breadcrumb" itemprop="title">Chemi... | How would you balance: Na + H2O --> NaOH + H2?
| null |
262 | a8c2ec58-6ddd-11ea-b559-ccda262736ce | https://socratic.org/questions/how-do-i-find-the-percentage-composition-of-chlorine-in-cocl-2 | 54.61% | start physical_unit 8 10 percent_composition none qc_end chemical_equation 10 10 qc_end end | [{"type":"physical unit","value":"Percentage composition [OF] Chlorine in COCl2"}] | [{"type":"physical unit","value":"54.61%"}] | [{"type":"chemical equation","value":"COCl2"}] | <h1 class="questionTitle" itemprop="name">How do I find the percentage composition of Chlorine in #CoCl_2#?</h1> | null | 54.61% | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>First determine the molar mass of cobalt chloride <mathjax>#("CoCl"_2")#</mathjax> and the mass of chlorine in the compound. Divide the mass of chlorine by the molar mass of cobalt chloride, then multiply by 100.</... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>The <a href="http://socratic.org/chemistry/the-mole-concept/percent-composition">percent composition</a> of chlorine in <mathjax>#"CoCl"_2"#</mathjax> is <mathjax>#54.611%#</mathjax>.</p></div>
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<div class="... | <article>
<h1 class="questionTitle" itemprop="name">How do I find the percentage composition of Chlorine in #CoCl_2#?</h1>
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<span class="breadcrumb" itempro... | How do I find the percentage composition of Chlorine in #CoCl_2#? | null |
263 | a997c766-6ddd-11ea-a85f-ccda262736ce | https://socratic.org/questions/a-sample-of-argon-gas-occupies-a-volume-of-950-ml-at-25-c-what-volume-will-the-g | 1029.70 mL | start physical_unit 1 4 volume ml qc_end physical_unit 1 4 9 10 volume qc_end physical_unit 1 4 12 13 temperature qc_end physical_unit 1 4 21 22 temperature qc_end c_other OTHER qc_end end | [{"type":"physical unit","value":"Volume2 [OF] argon gas sample [IN] mL"}] | [{"type":"physical unit","value":"1029.70 mL"}] | [{"type":"physical unit","value":"Volume1 [OF] argon gas sample [=] \\pu{950 mL}"},{"type":"physical unit","value":"Temperature1 [OF] argon gas sample [=] \\pu{25 ℃}"},{"type":"physical unit","value":"Temperature2 [OF] argon gas sample [=] \\pu{50 ℃}"},{"type":"other","value":"The pressure remains constant."}] | <h1 class="questionTitle" itemprop="name">A sample of argon gas occupies a volume of 950 mL at 25°C. What volume will the gas occupy at 50°C if the pressure remains constant?</h1> | null | 1029.70 mL | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Considering the gas as ideal we can use:<br/>
<mathjax>#PV=nRT#</mathjax><br/>
Where:<br/>
<mathjax>#P=#</mathjax> pressure;<br/>
<mathjax>#V=#</mathjax> volume;<br/>
<mathjax>#n=#</mathjax> number of moles;<br/>
<... | <div class="answerText" itemprop="text">
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<div class="markdown"><p>I fond: <mathjax>#1029.7ml#</mathjax></p></div>
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</div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Considering the gas as ideal we can use:<br/>
<mathj... | <article>
<h1 class="questionTitle" itemprop="name">A sample of argon gas occupies a volume of 950 mL at 25°C. What volume will the gas occupy at 50°C if the pressure remains constant?</h1>
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<a... | A sample of argon gas occupies a volume of 950 mL at 25°C. What volume will the gas occupy at 50°C if the pressure remains constant? | null |
264 | a9a65846-6ddd-11ea-b771-ccda262736ce | https://socratic.org/questions/what-is-the-molarity-of-a-sample-of-phosphoric-acid-if-15-00-ml-of-2-m-koh-was-r | 1.25 M | start physical_unit 6 9 molarity mol/l qc_end physical_unit 25 26 21 22 volume qc_end physical_unit 16 16 14 15 molarity qc_end end | [{"type":"physical unit","value":"Molarity [OF] phosphoric acid sample [IN] M"}] | [{"type":"physical unit","value":"1.25 M"}] | [{"type":"physical unit","value":"Volume [OF] H3PO4 sample [=] \\pu{12 ml}"},{"type":"physical unit","value":"Volume [OF] KOH solution [=] \\pu{15.00 ml}"},{"type":"physical unit","value":"Molarity [OF] KOH solution [=] \\pu{2 M}"}] | <h1 class="questionTitle" itemprop="name">What is the molarity of a sample of phosphoric acid if 15.00 ml of 2 M #KOH# was required to titrate 12 ml of the #H_3PO_4# sample? </h1> | null | 1.25 M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>This one is not so straightforward, and requires specialist knowledge.</p>
<p>It is a fact that phosphoric acid is a DIACID in aqueous solution, and reaches a stoichiometric endpoint at <mathjax>#HPO_4^(2-)#</mathj... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#[H_3PO_4]=1.25*mol*L^-1#</mathjax></p>
<p>Of course, there is a catch.............</p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown">... | <article>
<h1 class="questionTitle" itemprop="name">What is the molarity of a sample of phosphoric acid if 15.00 ml of 2 M #KOH# was required to titrate 12 ml of the #H_3PO_4# sample? </h1>
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<a... | What is the molarity of a sample of phosphoric acid if 15.00 ml of 2 M #KOH# was required to titrate 12 ml of the #H_3PO_4# sample? | null |
265 | abd6f840-6ddd-11ea-b00a-ccda262736ce | https://socratic.org/questions/if-1-93-10-3-mol-of-argon-occupies-a-65-8-ml-container-at-20-degrees-celsius-wha | 536.56 torr | start physical_unit 6 6 pressure torr qc_end physical_unit 6 6 1 4 mole qc_end physical_unit 6 6 9 10 volume qc_end physical_unit 6 6 13 15 temperature qc_end end | [{"type":"physical unit","value":"Pressure [OF] argon [IN] torr"}] | [{"type":"physical unit","value":"536.56 torr"}] | [{"type":"physical unit","value":"Mole [OF] argon [=] \\pu{1.93 × 10^(-3) mol}"},{"type":"physical unit","value":"Volume [OF] argon [=] \\pu{65.8 mL}"},{"type":"physical unit","value":"Temperature [OF] argon [=] \\pu{20 degrees Celsius}"}] | <h1 class="questionTitle" itemprop="name">If 1.93 * 10^-3 mol of argon occupies a 65.8-mL container at 20 degrees Celsius, what is the pressure (in torr)?</h1> | null | 536.56 torr | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>From the Ideal Gas equation, which you must be getting sick of.......</p>
<p><mathjax>#P=(nRT)/V=(1.93xx10^-3*molxx0.0821*(L*atm)/(K*mol)xx293*K)/(65.8*mLxx10^-3*L*mL^-1)#</mathjax></p>
<p><mathjax>#-=0.706*atm#</m... | <div class="answerText" itemprop="text">
<div class="answerSummary">
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<div class="markdown"><p><mathjax>#P~=0.706*atm-=??"Torr"#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>From the Ideal Gas equation, which you must be... | <article>
<h1 class="questionTitle" itemprop="name">If 1.93 * 10^-3 mol of argon occupies a 65.8-mL container at 20 degrees Celsius, what is the pressure (in torr)?</h1>
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<a href="/chemistry" i... | If 1.93 * 10^-3 mol of argon occupies a 65.8-mL container at 20 degrees Celsius, what is the pressure (in torr)? | null |
266 | a8ff8608-6ddd-11ea-bae1-ccda262736ce | https://socratic.org/questions/to-sterilize-a-50-0-g-glass-baby-battle-we-must-raise-its-temperature-from-22-c- | 3066 J | start physical_unit 5 7 heat_energy j qc_end physical_unit 5 7 3 4 mass qc_end physical_unit 5 7 14 15 temperature qc_end physical_unit 5 7 17 18 temperature qc_end end | [{"type":"physical unit","value":"Required heat [OF] glass baby battle [IN] J"}] | [{"type":"physical unit","value":"3066 J"}] | [{"type":"physical unit","value":"Mass [OF] glass baby battle [=] \\pu{50.0 g}"},{"type":"physical unit","value":"Temperature1 [OF] glass baby battle [=] \\pu{22 ℃}"},{"type":"physical unit","value":"Temperature2 [OF] glass baby battle [=] \\pu{95.0 ℃}"}] | <h1 class="questionTitle" itemprop="name">To sterilize a 50.0 g glass baby battle, we must raise its temperature from 22°C to 95.0°C. How much heat is required?</h1> | null | 3066 J | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>We use the <a href="https://socratic.org/chemistry/thermochemistry/specific-heat">specific heat</a> equation, which states that,</p>
<p><mathjax>#q=mcDeltaT#</mathjax></p>
<p>where:</p>
<blockquote>
<ul>
<li>
<p><m... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#3066#</mathjax> joules</p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>We use the <a href="https://socratic.org/chemistry/thermo... | <article>
<h1 class="questionTitle" itemprop="name">To sterilize a 50.0 g glass baby battle, we must raise its temperature from 22°C to 95.0°C. How much heat is required?</h1>
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<a href="/chemis... | To sterilize a 50.0 g glass baby battle, we must raise its temperature from 22°C to 95.0°C. How much heat is required? | null |
267 | a95e5e8c-6ddd-11ea-8cef-ccda262736ce | https://socratic.org/questions/the-reaction-of-iron-with-hydrochloric-acid-is-represented-by-the-following-ther | 1.90 L | start physical_unit 31 31 volume l qc_end physical_unit 0 1 19 20 heat_energy qc_end c_other OTHER qc_end c_other STP qc_end chemical_equation 37 44 qc_end physical_unit 0 1 47 48 deltah qc_end physical_unit 0 1 51 56 constant_r qc_end end | [{"type":"physical unit","value":"volume [OF] H2(g) [IN] L"}] | [{"type":"physical unit","value":"1.90 L"}] | [{"type":"physical unit","value":"Released heat [OF] the reaction [=] \\pu{7.36 kJ}"},{"type":"other","value":"Constant pressure."},{"type":"other","value":"STP"},{"type":"chemical equation","value":"Fe(s) + 2 HCl(aq) -> FeCl2(aq) + H2(g)"},{"type":"physical unit","value":"deltaH [OF] the reaction [=] \\pu{-87.9 kJ}"},... | <h1 class="questionTitle" itemprop="name">The reaction of iron with hydrochloric acid is represented by the following thermochemical equation. If, in a particular experiment, 7.36 kJ of heat was released at constant pressure, what volume of #H_2(g)#, measured at STP, was produced?</h1> | <div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p><mathjax>#Fe(s) + 2HCl(aq) -> FeCl_2(aq) + H_2(g)#</mathjax>;<br/>
<mathjax>#DeltaH = -"87.9 kJ"#</mathjax> </p>
<p><mathjax>#R = 0.0821 (L * atm)/(K* mol)#</mathjax></p... | 1.90 L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The idea here is that you need to use the <a href="https://socratic.org/chemistry/thermochemistry/enthalpy">enthalpy</a> change of reaction, <mathjax>#DeltaH#</mathjax>, to figure out the <strong>number of moles</s... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"1.90 L"#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The idea here is that you need to use the <a href="https://s... | <article>
<h1 class="questionTitle" itemprop="name">The reaction of iron with hydrochloric acid is represented by the following thermochemical equation. If, in a particular experiment, 7.36 kJ of heat was released at constant pressure, what volume of #H_2(g)#, measured at STP, was produced?</h1>
<div class="questionDet... | The reaction of iron with hydrochloric acid is represented by the following thermochemical equation. If, in a particular experiment, 7.36 kJ of heat was released at constant pressure, what volume of #H_2(g)#, measured at STP, was produced? |
#Fe(s) + 2HCl(aq) -> FeCl_2(aq) + H_2(g)#;
#DeltaH = -"87.9 kJ"#
#R = 0.0821 (L * atm)/(K* mol)#
|
268 | a8cff694-6ddd-11ea-8bb4-ccda262736ce | https://socratic.org/questions/5a1a74bb7c01496a7da17519 | 4.9 | start physical_unit 5 6 ph none qc_end physical_unit 15 15 10 11 volume qc_end physical_unit 15 15 13 14 molarity qc_end physical_unit 22 23 17 18 volume qc_end physical_unit 22 23 20 21 molarity qc_end physical_unit 15 15 28 28 pka qc_end end | [{"type":"physical unit","value":"pH [OF] the solution"}] | [{"type":"physical unit","value":"4.9"}] | [{"type":"physical unit","value":"Volume [OF] ammonia [=] \\pu{100 mL}"},{"type":"physical unit","value":"Molarity [OF] ammonia [=] \\pu{0.5 mol/L}"},{"type":"physical unit","value":"Volume [OF] hydrochloric acid [=] \\pu{50 mL}"},{"type":"physical unit","value":"Molarity [OF] hydrochloric acid [=] \\pu{1 M}"},{"type":... | <h1 class="questionTitle" itemprop="name">What is the pH of the solution formed by mixing 100 mL of 0.5 mol/L ammonia with 50 mL of 1 M hydrochloric acid?</h1> | <div class="questionDetailsContainer">
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<div class="markdown"><p>For ammonia. <mathjax>#"p"K_text(a) = 9.25#</mathjax>.</p></div>
</h2>
</div>
</div> | 4.9 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p><strong>Step 1. Figure out what is happening</strong></p>
<p>The <mathjax>#"p"K_text(a)#</mathjax> values tell you that <mathjax>#"HCl"#</mathjax> is a strong acid, that <mathjax>#"NH"_4^"... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><a href="https://socratic.org/chemistry/acids-and-bases/the-ph-concept">pH</a> = 4.9</p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><blockqu... | <article>
<h1 class="questionTitle" itemprop="name">What is the pH of the solution formed by mixing 100 mL of 0.5 mol/L ammonia with 50 mL of 1 M hydrochloric acid?</h1>
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<div class="markdown"><p>Fo... | What is the pH of the solution formed by mixing 100 mL of 0.5 mol/L ammonia with 50 mL of 1 M hydrochloric acid? |
For ammonia. #"p"K_text(a) = 9.25#.
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269 | ac765f12-6ddd-11ea-80da-ccda262736ce | https://socratic.org/questions/a-flask-contains-methane-chlorine-and-carbon-monoxide-gases-the-partial-pressure | 1.11 atm | start physical_unit 29 30 total_pressure atm qc_end end | [{"type":"physical unit","value":"Total pressure [OF] the flask [IN] atm"}] | [{"type":"physical unit","value":"1.11 atm"}] | [{"type":"physical unit","value":"Partial pressure [OF] methane gas [=] \\pu{0.215 atm}"},{"type":"physical unit","value":"Partial pressure [OF] chlorine gas [=] \\pu{50 torr}"},{"type":"physical unit","value":"Partial pressure [OF] carbon monoxide gas [=] \\pu{0.826 atm}"}] | <h1 class="questionTitle" itemprop="name">A flask contains methane, chlorine, and carbon monoxide gases. The partial pressures of each are 0.215 atm, 50 torr, and 0.826 respectively. What is the total pressure in the flask?</h1> | null | 1.11 atm | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>According to Raoul's law of <a href="https://socratic.org/chemistry/the-behavior-of-gases/partial-pressure">partial pressure</a>, the total pressure of a mixture of gases is equal to the sum of the partial pressure... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#P_("total")=1.11atm#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>According to Raoul's law of <a href="https://socr... | <article>
<h1 class="questionTitle" itemprop="name">A flask contains methane, chlorine, and carbon monoxide gases. The partial pressures of each are 0.215 atm, 50 torr, and 0.826 respectively. What is the total pressure in the flask?</h1>
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<span itemscope="" ite... | A flask contains methane, chlorine, and carbon monoxide gases. The partial pressures of each are 0.215 atm, 50 torr, and 0.826 respectively. What is the total pressure in the flask? | null |
270 | a8e7c764-6ddd-11ea-a64c-ccda262736ce | https://socratic.org/questions/a-sample-of-hydrogen-gas-h-2-has-a-volume-of-8-56-l-at-a-temperature-of-0-oc-and | 0.6 moles | start physical_unit 31 32 mole mol qc_end end | [{"type":"physical unit","value":"Mole [OF] H2 molecules [IN] moles"}] | [{"type":"physical unit","value":"0.6 moles"}] | [{"type":"physical unit","value":"Volume [OF] H2 gas [=] \\pu{8.56 L}"},{"type":"physical unit","value":"Temperature [OF] H2 gas [=] \\pu{0 ℃}"},{"type":"physical unit","value":"Pressure [OF] H2 gas [=] \\pu{1.5 atm}"}] | <h1 class="questionTitle" itemprop="name">A sample of hydrogen gas (#H_2#) has a volume of 8.56 L at a temperature of 0#"^oC# and a pressure of 1.5 atm. How do you calculate the moles of #H_2# molecules present in this gas sample?</h1> | null | 0.6 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#n=(PV)/(RT)#</mathjax> <mathjax>#=#</mathjax> <mathjax>#(1.5*atmxx8.56*L)/(0.0821*L*atm*mol^-1*K^-1xx273*K)#</mathjax></p>
<p>If we have set up this problem right, the answer should give units of moles. ... | <div class="answerText" itemprop="text">
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<div class="markdown"><p>We use the ideal gas equation.......<mathjax>#PV=nRT#</mathjax>, to get <mathjax>#n~=0.6*mol#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class=... | <article>
<h1 class="questionTitle" itemprop="name">A sample of hydrogen gas (#H_2#) has a volume of 8.56 L at a temperature of 0#"^oC# and a pressure of 1.5 atm. How do you calculate the moles of #H_2# molecules present in this gas sample?</h1>
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<span itemscope... | A sample of hydrogen gas (#H_2#) has a volume of 8.56 L at a temperature of 0#"^oC# and a pressure of 1.5 atm. How do you calculate the moles of #H_2# molecules present in this gas sample? | null |
271 | a9ac43a2-6ddd-11ea-b684-ccda262736ce | https://socratic.org/questions/how-much-heat-is-absorbed-by-a-2000-kg-granite-boulder-as-energy-from-the-sun-ca | 3.00 MJ | start physical_unit 9 10 heat_energy mj qc_end physical_unit 9 10 7 8 mass qc_end physical_unit 9 10 22 23 temperature qc_end physical_unit 9 10 25 26 temperature qc_end end | [{"type":"physical unit","value":"Absorbed heat [OF] granite boulder [IN] MJ"}] | [{"type":"physical unit","value":"3.00 MJ"}] | [{"type":"physical unit","value":"Mass [OF] granite boulder [=] \\pu{2000 kg}"},{"type":"physical unit","value":"Temperature1 [OF] granite boulder [=] \\pu{10 ℃}"},{"type":"physical unit","value":"Temperature2 [OF] granite boulder [=] \\pu{29 ℃}"}] | <h1 class="questionTitle" itemprop="name">How much heat is absorbed by a 2000 kg granite boulder as energy from the sun causes its temperature to change from 10°C to 29°C?</h1> | null | 3.00 MJ | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>Heat absorbed,<br/>
<mathjax>#H= m.c. del(theta)#</mathjax><br/>
Where, m= mass,<br/>
C= specific heat capacity. Assume <mathjax>#c=790 J/(kg)/K#</mathjax> for granite.<br/>
<mathjax>#del(theta)#</mathjax> is the c... | <div class="answerText" itemprop="text">
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<div class="markdown"><p>3.002 MJ</p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>Heat absorbed,<br/>
<mathjax>#H= m.c. del(theta)#</mathjax><br/>
Where, m= mass,<... | <article>
<h1 class="questionTitle" itemprop="name">How much heat is absorbed by a 2000 kg granite boulder as energy from the sun causes its temperature to change from 10°C to 29°C?</h1>
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<a hr... | How much heat is absorbed by a 2000 kg granite boulder as energy from the sun causes its temperature to change from 10°C to 29°C? | null |
272 | a97cb7fa-6ddd-11ea-8125-ccda262736ce | https://socratic.org/questions/what-is-the-molar-concentration-of-hydrogen-ions-if-12-drops-of-a-benzoic-acid-h | 1.3 × 10^(-9) M | start physical_unit 6 7 molarity mol/l qc_end physical_unit 26 27 24 25 molarity qc_end end | [{"type":"physical unit","value":"Molar concentration [OF] hydrogen ions [IN] M"}] | [{"type":"physical unit","value":"1.3 × 10^(-9) M"}] | [{"type":"physical unit","value":"Number [OF] HC7H5O2 solution drops [=] \\pu{12}"},{"type":"physical unit","value":"Number [OF] KOH solution drops [=] \\pu{26}"},{"type":"physical unit","value":"Molar concentration [OF] KOH solution [=] \\pu{0.40 M}"}] | <h1 class="questionTitle" itemprop="name">What is the molar concentration of hydrogen ions if 12 drops of a benzoic acid #HC_7H_5O_2# solution are titrated with 26 drops of a .40 M #KOH# solution?</h1> | null | 1.3 × 10^(-9) M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><blockquote></blockquote>
<p><strong>Warning! Long Answer.</strong></p>
<p>I assume that you have titrated to the end point.</p>
<blockquote></blockquote>
<p>The equation for the reaction is</p>
<p><mathjax>#"HA" + "K... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#["H"^+] = 1.3 × 10^"-9" color(white)(l)"mol/L"#</mathjax></p></div>
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<div class="markdown"><blockquote></blockquote>... | <article>
<h1 class="questionTitle" itemprop="name">What is the molar concentration of hydrogen ions if 12 drops of a benzoic acid #HC_7H_5O_2# solution are titrated with 26 drops of a .40 M #KOH# solution?</h1>
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<span itemscope="" itemtype="http://data-vocabula... | What is the molar concentration of hydrogen ions if 12 drops of a benzoic acid #HC_7H_5O_2# solution are titrated with 26 drops of a .40 M #KOH# solution? | null |
273 | ab441ad2-6ddd-11ea-a70d-ccda262736ce | https://socratic.org/questions/if-5-00-l-of-hydrogen-gas-measured-at-20-0-c-and-80-1-kpa-is-burned-in-an-excess | 0.33 grams | start physical_unit 4 5 mass g qc_end physical_unit 4 5 1 2 volume qc_end physical_unit 4 5 8 9 temperature qc_end physical_unit 4 5 11 12 pressure qc_end c_other OTHER qc_end end | [{"type":"physical unit","value":"Mass [OF] hydrogen gas [IN] grams"}] | [{"type":"physical unit","value":"0.33 grams"}] | [{"type":"physical unit","value":"Volume [OF] hydrogen gas [=] \\pu{5.00 L}"},{"type":"physical unit","value":"Temperature [OF] hydrogen gas [=] \\pu{20.0 ℃}"},{"type":"physical unit","value":"Pressure [OF] hydrogen gas [=] \\pu{80.1 kPa}"},{"type":"other","value":"Excess oxygen."}] | <h1 class="questionTitle" itemprop="name"> If 5.00 L of hydrogen gas measured at 20.0*C and 80.1 kPa is burned in an excess of oxygen, what mass under the same conditions, would be consumed? </h1> | null | 0.33 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Use the equation for the <a href="https://socratic.org/chemistry/the-behavior-of-gases/ideal-gas-law">ideal gas law</a> to find the moles of hydrogen gas. Then determine the mass by multiplying the moles by its mol... | <div class="answerText" itemprop="text">
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<div class="markdown"><p>The mass of <mathjax>#"H"_2"#</mathjax> consumed is <mathjax>#"0.331 g H"_2"#</mathjax>.</p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>U... | <article>
<h1 class="questionTitle" itemprop="name"> If 5.00 L of hydrogen gas measured at 20.0*C and 80.1 kPa is burned in an excess of oxygen, what mass under the same conditions, would be consumed? </h1>
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<span itemscope="" itemtype="http://data-vocabulary.or... | If 5.00 L of hydrogen gas measured at 20.0*C and 80.1 kPa is burned in an excess of oxygen, what mass under the same conditions, would be consumed? | null |
274 | acb533e4-6ddd-11ea-86ca-ccda262736ce | https://socratic.org/questions/a-common-laboratory-preparation-for-small-for-quantities-of-o-2-is-to-decompose- | 91.91% | start physical_unit 43 44 percent_yield none qc_end chemical_equation 16 23 qc_end physical_unit 31 31 28 29 mass qc_end physical_unit 9 9 33 34 mass qc_end end | [{"type":"physical unit","value":"Percent yield [OF] the reaction"}] | [{"type":"physical unit","value":"91.91%"}] | [{"type":"chemical equation","value":"2 KClO3(s) -> 2 KCl(s) + 3 O2(g)"},{"type":"physical unit","value":"Mass [OF] KCIO3 [=] \\pu{2.00 g}"},{"type":"physical unit","value":"Mass [OF] O2 [=] \\pu{0.720 g}"}] | <h1 class="questionTitle" itemprop="name">A common laboratory preparation for small for quantities of #O_2# is to decompose #KClO_3# by heating: #2KClO_3 (s) -> 2KCl (s) + 3O_2 (g)#. If the decomposition of 2.00 g of #KCIO_3# gives 0.720 g of #O_2#, what is the percent yield for the reaction?</h1> | null | 91.91% | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Start by examining the balanced chemical equation that describes this <strong><a href="https://socratic.org/chemistry/chemical-reactions/decomposition-reactions">decomposition reaction</a></strong></p>
<blockquote>... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#91.9%#</mathjax></p></div>
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<div class="markdown"><p>Start by examining the balanced chemical equation that describe... | <article>
<h1 class="questionTitle" itemprop="name">A common laboratory preparation for small for quantities of #O_2# is to decompose #KClO_3# by heating: #2KClO_3 (s) -> 2KCl (s) + 3O_2 (g)#. If the decomposition of 2.00 g of #KCIO_3# gives 0.720 g of #O_2#, what is the percent yield for the reaction?</h1>
<div cla... | A common laboratory preparation for small for quantities of #O_2# is to decompose #KClO_3# by heating: #2KClO_3 (s) -> 2KCl (s) + 3O_2 (g)#. If the decomposition of 2.00 g of #KCIO_3# gives 0.720 g of #O_2#, what is the percent yield for the reaction? | null |
275 | a911d3db-6ddd-11ea-a62a-ccda262736ce | https://socratic.org/questions/how-do-you-balance-nh3-o2-no2-h2o-the-number-in-the-parenthasis-are-subscribts-t | 4 NH3 + 7 O2 -> 4 NO2 + 6 H2O | start chemical_equation qc_end chemical_equation 4 10 qc_end end | [{"type":"other","value":"Chemical Equation [OF] the equation"}] | [{"type":"chemical equation","value":"4 NH3 + 7 O2 -> 4 NO2 + 6 H2O"}] | [{"type":"chemical equation","value":"NH3 + O2 -> NO2 + H2O"}] | <h1 class="questionTitle" itemprop="name">How do you balance __ NH3 + __O2--> __NO2 + __H2O?
The number in the parenthasis are subscribts, thank you all so much!!!?</h1> | null | 4 NH3 + 7 O2 -> 4 NO2 + 6 H2O | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>There is no fixed method actually. You have to take a random number as the number of molecules for <mathjax>#NH_3#</mathjax>, then calculate result. </p>
<p>As for here, I have taken <mathjax>#4#</mathjax> as the n... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#4NH_3 + 7O_2 -> 4NO_2 + 6H_2O#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>There is no fixed method actually. Y... | <article>
<h1 class="questionTitle" itemprop="name">How do you balance __ NH3 + __O2--> __NO2 + __H2O?
The number in the parenthasis are subscribts, thank you all so much!!!?</h1>
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<a hr... | How do you balance __ NH3 + __O2--> __NO2 + __H2O?
The number in the parenthasis are subscribts, thank you all so much!!!? | null |
276 | a83d4c34-6ddd-11ea-8d5e-ccda262736ce | https://socratic.org/questions/58e54ff97c0149694e54e5e4 | 0.05 mol/L | start physical_unit 19 19 volume mol/l qc_end physical_unit 10 12 6 7 mass qc_end physical_unit 19 19 15 16 volume qc_end end | [{"type":"physical unit","value":"Volume [OF] copper sulfate pentahydrate solution [IN] mol/L"}] | [{"type":"physical unit","value":"0.05 mol/L"}] | [{"type":"physical unit","value":"Mass [OF] copper sulfate pentahydrate [=] \\pu{1.24 g}"},{"type":"physical unit","value":"Volume [OF] solution [=] \\pu{100 cm^3}"}] | <h1 class="questionTitle" itemprop="name">What is the formality of a #1.24*g# mass of #"copper sulfate pentahydrate"# in a #100*cm^3# volume of solution?</h1> | null | 0.05 mol/L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p><mathjax>#"Concentration of sodium thiosulfate pentahydrate:"#</mathjax></p>
<p><mathjax>#-=#</mathjax> <mathjax>#((1.24*g)/(248.18*g*mol^-1))/(100*cm^3xx10^-3*cm^-3*L)#</mathjax></p>
<p><mathjax>#=0.0500*mol*L^-1#... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#"Formality"#</mathjax> <mathjax>#=#</mathjax> <mathjax>#"Moles of solute"/"Volume of solution (L)"=0.05*mol*L^-1#</mathjax>.</p></div>
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<h4 class="answerHeader">Expl... | <article>
<h1 class="questionTitle" itemprop="name">What is the formality of a #1.24*g# mass of #"copper sulfate pentahydrate"# in a #100*cm^3# volume of solution?</h1>
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<a href="/chemistry" it... | What is the formality of a #1.24*g# mass of #"copper sulfate pentahydrate"# in a #100*cm^3# volume of solution? | null |
277 | ac30dc58-6ddd-11ea-898e-ccda262736ce | https://socratic.org/questions/a-250-ml-sample-of-oxygen-is-collected-over-water-at-25-c-and-760-0-torr-pressur | 736.20 mmHg | start physical_unit 22 24 pressure mmhg qc_end physical_unit 3 5 1 2 volume qc_end physical_unit 3 5 11 12 temperature qc_end physical_unit 3 5 14 15 pressure qc_end end | [{"type":"physical unit","value":"Pressure [OF] the dry gas [IN] mmHg"}] | [{"type":"physical unit","value":"736.20 mmHg"}] | [{"type":"physical unit","value":"Volume [OF] oxygen sample [=] \\pu{250 mL}"},{"type":"physical unit","value":"Temperature [OF] oxygen sample [=] \\pu{25 ℃}"},{"type":"physical unit","value":"Pressure [OF] oxygen sample [=] \\pu{760.0 torr}"},{"type":"substance name","value":"Water "}] | <h1 class="questionTitle" itemprop="name">A 250 mL sample of oxygen is collected over water at 25°C and 760.0 torr pressure. What is the pressure of the dry gas alone? </h1> | null | 736.20 mmHg | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The gas collected over water consists of (i) whatever the gas is, and (ii) the saturated vapour pressure. At <mathjax>#25#</mathjax> <mathjax>#""^@C#</mathjax>, <mathjax>#"SVP"#</mathjax> <mathjax>#=#</mathjax> <m... | <div class="answerText" itemprop="text">
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<div class="markdown"><p>You need to know the <mathjax>#"saturated vapour pressure"#</mathjax> of water at <mathjax>#25#</mathjax> <mathjax>#""^@C#</mathjax>.</p></div>
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<h4 class="answerHeader">Expla... | <article>
<h1 class="questionTitle" itemprop="name">A 250 mL sample of oxygen is collected over water at 25°C and 760.0 torr pressure. What is the pressure of the dry gas alone? </h1>
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<a href=... | A 250 mL sample of oxygen is collected over water at 25°C and 760.0 torr pressure. What is the pressure of the dry gas alone? | null |
278 | aad5d492-6ddd-11ea-b8c4-ccda262736ce | https://socratic.org/questions/when-4-22-moles-of-al-reacts-with-5-0-moles-of-hbr-how-many-moles-of-h-2-are-for | 2.5 moles | start physical_unit 15 15 mole mol qc_end physical_unit 4 4 1 2 mole qc_end physical_unit 10 10 7 8 mole qc_end end | [{"type":"physical unit","value":"Mole [OF] H2 [IN] moles"}] | [{"type":"physical unit","value":"2.5 moles"}] | [{"type":"physical unit","value":"Mole [OF] Al [=] \\pu{4.22 moles}"},{"type":"physical unit","value":"Mole [OF] HBr [=] \\pu{5.0 moles}"}] | <h1 class="questionTitle" itemprop="name">When 4.22 moles of #Al# reacts with 5.0 moles of #HBr#, how many moles of #H_2# are formed?</h1> | null | 2.5 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>First write a balanced chemical equation for the reaction of the metal with the acid :</p>
<p><mathjax>#2Al+6HBr->2AlBr_3+3H_2#</mathjax>.</p>
<p>This represents <a href="http://socratic.org/chemistry/the-mole-c... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#2.5mol#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>First write a balanced chemical equation for the reaction of t... | <article>
<h1 class="questionTitle" itemprop="name">When 4.22 moles of #Al# reacts with 5.0 moles of #HBr#, how many moles of #H_2# are formed?</h1>
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<span ... | When 4.22 moles of #Al# reacts with 5.0 moles of #HBr#, how many moles of #H_2# are formed? | null |
279 | aacac046-6ddd-11ea-84ba-ccda262736ce | https://socratic.org/questions/if-you-have-3-mol-of-glucose-in-6-l-of-solution-what-is-the-molarity-of-the-solu | 0.50 M | start physical_unit 17 18 molarity mol/l qc_end physical_unit 6 6 3 4 mole qc_end physical_unit 11 11 8 9 volume qc_end end | [{"type":"physical unit","value":"Molarity [OF] the solution [IN] M"}] | [{"type":"physical unit","value":"0.50 M"}] | [{"type":"physical unit","value":"Mole [OF] glucose [=] \\pu{3 mol}"},{"type":"physical unit","value":"Volume [OF] glucose solution [=] \\pu{6 L}"}] | <h1 class="questionTitle" itemprop="name">If you have 3 mol of glucose in 6 L of solution, what is the molarity of the solution? </h1> | null | 0.50 M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#"Molarity"="Moles of solute"/"Volume of solution"#</mathjax></p>
<p>And here, this quotient is <mathjax>#(3*mol)/(6*L)=0.5*mol*L^-1#</mathjax> WITH RESPECT to GLUCOSE.............</p>
<p>Given that glucos... | <div class="answerText" itemprop="text">
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<div class="markdown"><p>Why <mathjax>#0.5*mol*L^-1#</mathjax>..............</p></div>
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<div class="markdown"><p><mathjax>#"Molarity"="Moles of solute"... | <article>
<h1 class="questionTitle" itemprop="name">If you have 3 mol of glucose in 6 L of solution, what is the molarity of the solution? </h1>
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<span clas... | If you have 3 mol of glucose in 6 L of solution, what is the molarity of the solution? | null |
280 | a96c988b-6ddd-11ea-811c-ccda262736ce | https://socratic.org/questions/if-i-inhale-2-20-l-of-gas-at-a-temperature-of-18-c-at-a-pressure-of-1-50-atm-how | 0.14 moles | start physical_unit 6 6 mole mol qc_end physical_unit 6 6 3 4 volume qc_end physical_unit 6 6 11 12 temperature qc_end physical_unit 6 6 17 18 pressure qc_end end | [{"type":"physical unit","value":"Mole [OF] gas [IN] moles"}] | [{"type":"physical unit","value":"0.14 moles"}] | [{"type":"physical unit","value":"Volume [OF] gas [=] \\pu{2.20 L}"},{"type":"physical unit","value":"Temperature [OF] gas [=] \\pu{18 ℃}"},{"type":"physical unit","value":"Pressure [OF] gas [=] \\pu{1.50 atm}"}] | <h1 class="questionTitle" itemprop="name">If I inhale 2.20 L of gas at a temperature of 18°C at a pressure of 1.50 atm, how many moles of gas were inhaled?</h1> | null | 0.14 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>You will need the <a href="https://socratic.org/chemistry/the-behavior-of-gases/ideal-gas-law">ideal gas law</a> to answer this question. The formula for the ideal gas law is:<br/>
<img alt="https://jahschem.wikisp... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#n="0.138 mol"#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>You will need the <a href="https://socratic.org/chemist... | <article>
<h1 class="questionTitle" itemprop="name">If I inhale 2.20 L of gas at a temperature of 18°C at a pressure of 1.50 atm, how many moles of gas were inhaled?</h1>
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<a href="/chemistry" ... | If I inhale 2.20 L of gas at a temperature of 18°C at a pressure of 1.50 atm, how many moles of gas were inhaled? | null |
281 | ac21bfa2-6ddd-11ea-9c0b-ccda262736ce | https://socratic.org/questions/a-gas-has-a-volume-of-2-00-l-at-323-k-and-3-00-atm-what-will-be-the-new-volume-i | 5.07 L | start physical_unit 1 1 volume l qc_end physical_unit 1 1 6 7 volume qc_end physical_unit 1 1 12 13 pressure qc_end physical_unit 1 1 34 35 pressure qc_end physical_unit 1 1 9 10 temperature qc_end physical_unit 1 1 26 27 temperature qc_end end | [{"type":"physical unit","value":"Volume2 [OF] the gas [IN] L"}] | [{"type":"physical unit","value":"5.07 L"}] | [{"type":"physical unit","value":"Volume1 [OF] the gas [=] \\pu{2.00 L}"},{"type":"physical unit","value":"Pressure1 [OF] the gas [=] \\pu{3.00 atm}"},{"type":"physical unit","value":"Pressure2 [OF] the gas [=] \\pu{1 atm}"},{"type":"physical unit","value":"Temperature1 [OF] the gas [=] \\pu{323 K}"},{"type":"physical ... | <h1 class="questionTitle" itemprop="name">A gas has a volume of 2.00 L at 323 K and 3.00 atm. What will be the new volume if the temperature is changed to 273 K and the pressure is changed to 1 atm?</h1> | null | 5.07 L | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>So <mathjax>#V_2 =(P_1V_1T_2)/(P_2T_1)#</mathjax> <mathjax>#=#</mathjax> <mathjax>#(1.00*cancel(atm)xx2.00*L*273*cancelK)/(3.00*cancel(atm)xx323*cancelK)#</mathjax> <mathjax>#=#</mathjax> <mathjax>#??L#</mathjax>.<... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>We use the <a href="http://socratic.org/chemistry/the-behavior-of-gases/combined-gas-law">combined gas law</a>: <mathjax>#(P_1V_1)/T_1 =(P_2V_2)/T_2 #</mathjax>. The volume should reasonably REDUCE on compression and co... | <article>
<h1 class="questionTitle" itemprop="name">A gas has a volume of 2.00 L at 323 K and 3.00 atm. What will be the new volume if the temperature is changed to 273 K and the pressure is changed to 1 atm?</h1>
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<span itemscope="" itemtype="http://data-vocabu... | A gas has a volume of 2.00 L at 323 K and 3.00 atm. What will be the new volume if the temperature is changed to 273 K and the pressure is changed to 1 atm? | null |
282 | a9ce3548-6ddd-11ea-94ce-ccda262736ce | https://socratic.org/questions/what-is-the-molecular-mass-of-a-compound-if-560ml-have-a-mass-of-1-10g-at-stp | 44.59 g/mol | start physical_unit 6 7 molecular_weight g/mol qc_end physical_unit 6 7 9 10 volume qc_end physical_unit 6 7 15 16 mass qc_end c_other STP qc_end end | [{"type":"physical unit","value":"Molecular mass [OF] a compound [IN] g/mol"}] | [{"type":"physical unit","value":"44.59 g/mol"}] | [{"type":"physical unit","value":"Volume [OF] a compound [=] \\pu{560 mL}"},{"type":"physical unit","value":"Mass [OF] a compound [=] \\pu{1.10 g}"},{"type":"other","value":"STP"}] | <h1 class="questionTitle" itemprop="name">What is the molecular mass of a compound if 560mL have a mass of 1.10g at STP?
</h1> | null | 44.59 g/mol | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Note: This is going to be a long answer.</p>
<p><strong>First determine the number of moles.</strong></p>
<p><mathjax>#"STP=273.15 K and 100 kPa"#</mathjax></p>
<p><strong>Use the <a href="http://socratic.org/chemi... | <div class="answerText" itemprop="text">
<div class="answerSummary">
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<div class="markdown"><p>The molar mass (molecular mass in grams) is <mathjax>#"45 g"#</mathjax>.</p></div>
</div>
</div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>Note: This is goi... | <article>
<h1 class="questionTitle" itemprop="name">What is the molecular mass of a compound if 560mL have a mass of 1.10g at STP?
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<span class="bread... | What is the molecular mass of a compound if 560mL have a mass of 1.10g at STP?
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283 | a8d5114b-6ddd-11ea-b81d-ccda262736ce | https://socratic.org/questions/c-2h-4-3o-2-2co-2-2h-2o-if-you-start-with-45-grams-of-ethylene-c-2h-4-how-many-g | 141.42 grams | start physical_unit 23 24 mass g qc_end chemical_equation 0 9 qc_end physical_unit 0 0 14 15 mass qc_end end | [{"type":"physical unit","value":"Mass [OF] carbon dioxide [IN] grams"}] | [{"type":"physical unit","value":"141.42 grams"}] | [{"type":"chemical equation","value":"C2H4 + 3 O2 -> 2 CO2 + 2 H2O"},{"type":"physical unit","value":"Mass [OF] C2H4 [=] \\pu{45 grams}"}] | <h1 class="questionTitle" itemprop="name">#C_2H_4 + 3O_2 -> 2CO_2 +2H_2O#. If you start with 45 grams of ethylene (#C_2H_4#), how many grams of carbon dioxide will be produced?</h1> | null | 141.42 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#"No. of mol of ethylene"=45/(2*12+4*1)~~1.607mol#</mathjax></p>
<p><mathjax>#"No. of mol of "CO_2" produced"=2*1.607=3.214mol#</mathjax></p>
<p><mathjax>#"Mass of "CO_2"=3.214*(12+2*16)=141.416g#</mathjax... | <div class="answerText" itemprop="text">
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<div class="markdown"><p>141.416g</p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p><mathjax>#"No. of mol of ethylene"=45/(2*12+4*1)~~1.607mol#</mathjax></p>
<p><mat... | <article>
<h1 class="questionTitle" itemprop="name">#C_2H_4 + 3O_2 -> 2CO_2 +2H_2O#. If you start with 45 grams of ethylene (#C_2H_4#), how many grams of carbon dioxide will be produced?</h1>
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<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrum... | #C_2H_4 + 3O_2 -> 2CO_2 +2H_2O#. If you start with 45 grams of ethylene (#C_2H_4#), how many grams of carbon dioxide will be produced? | null |
284 | ace52fb8-6ddd-11ea-b033-ccda262736ce | https://socratic.org/questions/how-many-copper-atoms-are-in-5-6-moles-of-cu-2o | 6.74 × 10^24 | start physical_unit 2 3 number none qc_end physical_unit 9 9 6 7 mole qc_end end | [{"type":"physical unit","value":"Number [OF] copper atoms"}] | [{"type":"physical unit","value":"6.74 × 10^24"}] | [{"type":"physical unit","value":"Mole [OF] Cu2O [=] \\pu{5.6 moles}"}] | <h1 class="questionTitle" itemprop="name">How many copper atoms are in 5.6 moles of #Cu_2O#?</h1> | null | 6.74 × 10^24 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>In one mole you have Avogadro's number (<mathjax>#6.022×10^(23)#</mathjax>) of objects, in this case 'formula units' of <mathjax>#Cu_2O#</mathjax>.</p>
<p>So, in <mathjax>#5.6#</mathjax> moles we have:</p>
<p><math... | <div class="answerText" itemprop="text">
<div class="answerSummary">
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<div class="markdown"><p>I found <mathjax>#6.74×10^(24)#</mathjax> Cu atoms.</p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>In one mole you have Avogadro's number... | <article>
<h1 class="questionTitle" itemprop="name">How many copper atoms are in 5.6 moles of #Cu_2O#?</h1>
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<span class="breadcrumb" itemprop="title">Chemi... | How many copper atoms are in 5.6 moles of #Cu_2O#? | null |
285 | a8e50837-6ddd-11ea-b3f7-ccda262736ce | https://socratic.org/questions/how-many-grams-of-sodium-fluoride-naf-are-needed-to-prepare-a-0-400-m-naf-soluti | 12.60 g | start physical_unit 6 6 mass g qc_end physical_unit 14 15 12 13 molarity qc_end physical_unit 20 20 18 19 mass qc_end end | [{"type":"physical unit","value":"Mass [OF] NaF [IN] grams"}] | [{"type":"physical unit","value":"12.60 g"}] | [{"type":"physical unit","value":"Molarity [OF] NaF solution [=] \\pu{0.400 M}"},{"type":"physical unit","value":"Mass [OF] water [=] \\pu{750 g}"}] | <h1 class="questionTitle" itemprop="name">How many grams of sodium fluoride (NaF) are needed to prepare a 0.400 m NaF solution that contains 750 g water?</h1> | null | 12.60 g | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>As you know, the <strong><a href="https://socratic.org/chemistry/solutions-and-their-behavior/molality">molality</a></strong> of a solution represents the number of moles of <a href="https://socratic.org/chemistry/... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#"13 g NaF"#</mathjax></p></div>
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</div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>As you know, the <strong><a href="https://socratic.org/che... | <article>
<h1 class="questionTitle" itemprop="name">How many grams of sodium fluoride (NaF) are needed to prepare a 0.400 m NaF solution that contains 750 g water?</h1>
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<a href="/chemistry" it... | How many grams of sodium fluoride (NaF) are needed to prepare a 0.400 m NaF solution that contains 750 g water? | null |
286 | aab5d5ae-6ddd-11ea-bfa3-ccda262736ce | https://socratic.org/questions/what-is-the-actual-formula-for-iron-rust | Fe2O3 | start chemical_formula qc_end substance 6 7 qc_end end | [{"type":"other","value":"Chemical Formula [OF] iron rust [IN] default"}] | [{"type":"chemical equation","value":"Fe2O3"}] | [{"type":"substance name","value":"Iron rust"}] | <h1 class="questionTitle" itemprop="name">What is the actual formula for iron rust ?? </h1> | null | Fe2O3 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Rust is just iron oxide, so it is made up of iron and oxygen. We can find the empirical formula (simplest ratio of a compound's components) by looking at the ions each element forms.<br/>
Oxygen forms <mathjax>#O^(... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#Fe_2O_3#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>Rust is just iron oxide, so it is made up of iron and oxygen.... | <article>
<h1 class="questionTitle" itemprop="name">What is the actual formula for iron rust ?? </h1>
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<span class="breadcrumb" itemprop="title">Chemistry</... | What is the actual formula for iron rust ?? | null |
287 | a8aa7bc6-6ddd-11ea-a877-ccda262736ce | https://socratic.org/questions/in-the-equation-2c-2h-6-7o-2-4co-2-6h-2o-if-15-g-of-c-2h-6-react-with-45-g-of-o- | 27 grams | start physical_unit 29 29 mass g qc_end chemical_equation 3 13 qc_end physical_unit 4 4 15 16 mass qc_end physical_unit 7 7 21 22 mass qc_end end | [{"type":"physical unit","value":"Mass [OF] water [IN] grams"}] | [{"type":"physical unit","value":"27 grams"}] | [{"type":"chemical equation","value":"2 C2H6 + 7 O2 -> 4 CO2 + 6 H2O"},{"type":"physical unit","value":"Mass [OF] C2H6 [=] \\pu{15 g}"},{"type":"physical unit","value":"Mass [OF] O2 [=] \\pu{45 g}"}] | <h1 class="questionTitle" itemprop="name">In the equation #2C_2H_6 + 7O_2 -> 4CO_2 + 6H_2O#, if 15 g of #C_2H_6# react with 45 g of #O_2#, how many grams of water will be produced?</h1> | null | 27 grams | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#"Moles of dioxygen"#</mathjax> <mathjax>#=#</mathjax> <mathjax>#(45*g)/(32.00*g*mol^-1)=1.41*mol#</mathjax>.</p>
<p>Clearly, there is insufficient dioxygen for complete combustion; i.e. complete combustio... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#"Moles of ethane"#</mathjax> <mathjax>#=#</mathjax> <mathjax>#(15*g)/(30.07*g*mol^-1)=0.499*mol#</mathjax>.</p>
<p>I gets <mathjax>#27*g#</mathjax> water product............</p></div>
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<div class="... | <article>
<h1 class="questionTitle" itemprop="name">In the equation #2C_2H_6 + 7O_2 -> 4CO_2 + 6H_2O#, if 15 g of #C_2H_6# react with 45 g of #O_2#, how many grams of water will be produced?</h1>
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<span itemscope="" itemtype="http://data-vocabulary.org/Breadc... | In the equation #2C_2H_6 + 7O_2 -> 4CO_2 + 6H_2O#, if 15 g of #C_2H_6# react with 45 g of #O_2#, how many grams of water will be produced? | null |
288 | aab51264-6ddd-11ea-a2f3-ccda262736ce | https://socratic.org/questions/how-do-you-calculate-the-molarity-m-of-157-6-g-of-h-2so-4-in-1-170-l-of-solution | 1.37 M | start physical_unit 11 11 molarity mol/l qc_end physical_unit 11 11 8 9 mass qc_end physical_unit 16 16 13 14 volume qc_end end | [{"type":"physical unit","value":"Molarity [OF] H2SO4 solution [IN] M"}] | [{"type":"physical unit","value":"1.37 M"}] | [{"type":"physical unit","value":"Mass [OF] H2SO4 [=] \\pu{157.6 g}"},{"type":"physical unit","value":"Volume [OF] H2SO4 solution [=] \\pu{1.170 L}"}] | <h1 class="questionTitle" itemprop="name">How do you calculate the molarity (M) of 157.6 g of #H_2SO_4# in 1.170 L of solution?</h1> | null | 1.37 M | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>An interesting approach to try here is to calculate the number of <em>grams</em> of sulfuric acid present in <mathjax>#"1 L"#</mathjax> of solution first, then convert this to <em>moles</em> present in <mathjax>#"1... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#"1.373 mol L"^(-1)#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>An interesting approach to try here is to calculat... | <article>
<h1 class="questionTitle" itemprop="name">How do you calculate the molarity (M) of 157.6 g of #H_2SO_4# in 1.170 L of solution?</h1>
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<span class=... | How do you calculate the molarity (M) of 157.6 g of #H_2SO_4# in 1.170 L of solution? | null |
289 | ac0eb495-6ddd-11ea-a643-ccda262736ce | https://socratic.org/questions/how-many-moles-of-c-are-needed-to-react-with-0-480-mole-so-2 | 0.480 moles | start physical_unit 4 4 mole mol qc_end physical_unit 12 12 10 11 mole qc_end end | [{"type":"physical unit","value":"Mole [OF] C [IN] moles"}] | [{"type":"physical unit","value":"0.480 moles"}] | [{"type":"physical unit","value":"Mole [OF] SO2 [=] \\pu{0.480 moles}"}] | <h1 class="questionTitle" itemprop="name">How many moles of #C# are needed to react with 0.480 mole #SO_2#?</h1> | null | 0.480 moles | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The equation is stoichiometrically balanced. Clearly, if 0.480 mol sulfure are reduced, 0.480 mol of carbon are required. What are the masses of each reactant given these molar quantities.</p></div>
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<div class="markdown"><p><mathjax>#C(s)+SO_2(g) rarrS(s) + CO_2(g)#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>The equation is stoichiometrically ba... | <article>
<h1 class="questionTitle" itemprop="name">How many moles of #C# are needed to react with 0.480 mole #SO_2#?</h1>
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<span class="breadcrumb" itempro... | How many moles of #C# are needed to react with 0.480 mole #SO_2#? | null |
290 | ac8f84a8-6ddd-11ea-b44d-ccda262736ce | https://socratic.org/questions/how-much-heat-is-required-to-convert-5-88-g-of-ice-at-12-0-c-to-water-at-25-0-c- | 2.73 kJ | start physical_unit 10 10 heat_energy kj qc_end physical_unit 10 10 7 8 mass qc_end physical_unit 10 10 12 13 temperature qc_end physical_unit 15 15 17 18 temperature qc_end physical_unit 10 10 26 27 heat_capacity qc_end end | [{"type":"physical unit","value":"Required heat [OF] ice [IN] kJ"}] | [{"type":"physical unit","value":"2.73 kJ"}] | [{"type":"physical unit","value":"Mass [OF] ice [=] \\pu{5.88 g}"},{"type":"physical unit","value":"Temperature1 [OF] ice [=] \\pu{-12.0 ℃}"},{"type":"physical unit","value":"Temperature2 [OF] water [=] \\pu{25.0 ℃}"},{"type":"physical unit","value":"Heat capacity [OF] ice [=] \\pu{2.09 J/℃}"}] | <h1 class="questionTitle" itemprop="name">How much heat is required to convert 5.88 g of ice at -12.0°C to water at 25.0°C, if the heat capacity of ice is 2.09 J/°C?</h1> | null | 2.73 kJ | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Your strategy here will be to determine </p>
<ul>
<li>
<p><em>how much heat is required to convert that sample of ice from <strong>solid</strong> at</em> <mathjax>#-12.0^@"C"#</mathjax> <em>to <strong>solid</strong... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#q_"total" = "2.73 kJ"#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Your strategy here will be to determine </p>
<u... | <article>
<h1 class="questionTitle" itemprop="name">How much heat is required to convert 5.88 g of ice at -12.0°C to water at 25.0°C, if the heat capacity of ice is 2.09 J/°C?</h1>
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<a href="/c... | How much heat is required to convert 5.88 g of ice at -12.0°C to water at 25.0°C, if the heat capacity of ice is 2.09 J/°C? | null |
291 | a837a702-6ddd-11ea-bbc3-ccda262736ce | https://socratic.org/questions/what-is-the-covalent-compound-formula-for-nitric-acid | NO2OH | start chemical_formula qc_end substance 7 8 qc_end end | [{"type":"other","value":"Chemical Formula [OF] the covalent compound [IN] default"}] | [{"type":"chemical equation","value":"NO2OH"}] | [{"type":"substance name","value":"Nitric Acid"}] | <h1 class="questionTitle" itemprop="name">What is the covalent compound formula for Nitric Acid?</h1> | null | NO2OH | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Imagine the <mathjax>#N#</mathjax> with 5 valencies, in the centre. Four of those are taken by two double-bonded <mathjax>#O#</mathjax>, and the fifth is taken by an <mathjax>#OH#</mathjax></p>
<p>In a watery envir... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>It would be <mathjax>#NO_2OH#</mathjax></p></div>
</div>
</div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Imagine the <mathjax>#N#</mathjax> with 5 valencie... | <article>
<h1 class="questionTitle" itemprop="name">What is the covalent compound formula for Nitric Acid?</h1>
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<span class="breadcrumb" itemprop="title">C... | What is the covalent compound formula for Nitric Acid? | null |
292 | a9cda212-6ddd-11ea-a486-ccda262736ce | https://socratic.org/questions/how-do-you-write-the-formula-for-calcium-fluoride | CaF2 | start chemical_formula qc_end substance 7 8 qc_end end | [{"type":"other","value":"Chemical Formula [OF] calcium fluoride [IN] default"}] | [{"type":"chemical equation","value":"CaF2"}] | [{"type":"substance name","value":"Calcium fluoride"}] | <h1 class="questionTitle" itemprop="name">How do you write the formula for calcium fluoride?</h1> | null | CaF2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>An ionic compound is neutral, which means its overall charge is zero. Therefore, the sum of the charges of each ion in the compound must equal zero.</p>
<p>In calcium fluoride, the calcium ion <mathjax>#"Ca"^(2+)"#... | <div class="answerText" itemprop="text">
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<div class="markdown"><p>The formula for calcium fluoride is <mathjax>#"CaF"_2"#</mathjax>.</p></div>
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<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>An ionic compound is ne... | <article>
<h1 class="questionTitle" itemprop="name">How do you write the formula for calcium fluoride?</h1>
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<span class="breadcrumb" itemprop="title">Chemi... | How do you write the formula for calcium fluoride? | null |
293 | a9217876-6ddd-11ea-8c49-ccda262736ce | https://socratic.org/questions/the-volume-v-of-gas-varies-inversely-as-the-pressure-p-on-it-the-volume-of-a-gas | 140 cm^3 | start physical_unit 4 4 volume cm^3 qc_end physical_unit 4 4 19 20 volume qc_end physical_unit 4 4 25 26 pressure qc_end physical_unit 4 4 35 36 pressure qc_end c_other OTHER qc_end end | [{"type":"physical unit","value":"Volume2 [OF] the gas [IN] cm^3"}] | [{"type":"physical unit","value":"140 cm^3"}] | [{"type":"physical unit","value":"Volume1 [OF] the gas [=] \\pu{200 cm^3}"},{"type":"physical unit","value":"Pressure1 [OF] the gas [=] \\pu{21 kg/cm^2}"},{"type":"physical unit","value":"Pressure2 [OF] the gas [=] \\pu{30 kg/cm^2}"},{"type":"other","value":"The volume V of gas varies inversely as the pressure P on it.... | <h1 class="questionTitle" itemprop="name">The volume V of gas varies inversely as the pressure P on it. The volume of a gas is 200 cm^3 under a pressure of 21 kg/cm^2. What will it's volume under a pressure of 30/kg/cm^2?</h1> | null | 140 cm^3 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
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<div class="markdown"><p>Boyle's law states that for a fixed mass of gas at constant temperature, the absolute pressure and the volume of a gas are inversely proportional.<br/>
<mathjax>#p1*v1 =p2*v2#</mathjax></p>
<p>So,<br/>
<mathjax>#p1... | <div class="answerText" itemprop="text">
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<div class="markdown"><p>140 <mathjax>#cm^2#</mathjax></p></div>
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<div class="markdown"><p>Boyle's law states that for a fixed mass of gas at constant ... | <article>
<h1 class="questionTitle" itemprop="name">The volume V of gas varies inversely as the pressure P on it. The volume of a gas is 200 cm^3 under a pressure of 21 kg/cm^2. What will it's volume under a pressure of 30/kg/cm^2?</h1>
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<span itemscope="" itemt... | The volume V of gas varies inversely as the pressure P on it. The volume of a gas is 200 cm^3 under a pressure of 21 kg/cm^2. What will it's volume under a pressure of 30/kg/cm^2? | null |
294 | ac3d28cb-6ddd-11ea-9c09-ccda262736ce | https://socratic.org/questions/what-is-the-formula-of-the-conjugate-acid-of-hso-4 | H2SO4 | start chemical_formula qc_end chemical_equation 9 9 qc_end end | [{"type":"other","value":"Chemical Formula [OF] the conjugate acid [IN] default"}] | [{"type":"chemical equation","value":"H2SO4"}] | [{"type":"chemical equation","value":"HSO4-"}] | <h1 class="questionTitle" itemprop="name">What is the formula of the conjugate acid of #HSO_4^-#?</h1> | null | H2SO4 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The conjugate acid of a species is simply the original species PLUS a proton, <mathjax>#H^+#</mathjax>. As with all such exercises, both mass and charge are CONSERVED. What do I mean here?</p>
<p>Can you tell the... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#H_2SO_4#</mathjax>.</p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The conjugate acid of a species is simply the original speci... | <article>
<h1 class="questionTitle" itemprop="name">What is the formula of the conjugate acid of #HSO_4^-#?</h1>
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<span class="breadcrumb" itemprop="title">... | What is the formula of the conjugate acid of #HSO_4^-#? | null |
295 | a8e49e4e-6ddd-11ea-a91c-ccda262736ce | https://socratic.org/questions/how-do-you-find-the-molecular-formula-of-nicotine-cxhynz-when-0-438-grams-of-nic | C10H14N2 | start chemical_formula qc_end physical_unit 20 20 18 19 mass qc_end physical_unit 24 24 22 23 mass qc_end physical_unit 8 8 11 12 mass qc_end physical_unit 8 8 32 35 molecular_weight qc_end end | [{"type":"other","value":"Chemical Formula [OF] CxHyNz [IN] molecular"}] | [{"type":"chemical equation","value":"C10H14N2"}] | [{"type":"physical unit","value":"Mass [OF] CO2 [=] \\pu{1.188 g}"},{"type":"physical unit","value":"Mass [OF] H2O [=] \\pu{0.341 g}"},{"type":"physical unit","value":"Mass [OF] nicotine [=] \\pu{0.438 grams}"},{"type":"physical unit","value":"Molecular weight [OF] nicotine [=] \\pu{162.2 g per mole}"}] | <h1 class="questionTitle" itemprop="name">How do you find the molecular formula of nicotine (CxHyNz), when
0.438 grams of nicotine burns to make 1.188 g CO2 and 0.341 g H2O? The molecular weight of the nicotine is 162.2g per mole. </h1> | null | C10H14N2 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><strong>!! LONG ANSWER !!</strong></p>
<p>Notice that despite the fact that nicotine is said to contain carbon, hydrogen, <strong>and</strong> nitrogen, the problem only provides you with information about how much... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#"C"_10"H"_14"N"_2#</mathjax></p></div>
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</div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><strong>!! LONG ANSWER !!</strong></p>
<p>Notice th... | <article>
<h1 class="questionTitle" itemprop="name">How do you find the molecular formula of nicotine (CxHyNz), when
0.438 grams of nicotine burns to make 1.188 g CO2 and 0.341 g H2O? The molecular weight of the nicotine is 162.2g per mole. </h1>
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<span itemscop... | How do you find the molecular formula of nicotine (CxHyNz), when
0.438 grams of nicotine burns to make 1.188 g CO2 and 0.341 g H2O? The molecular weight of the nicotine is 162.2g per mole. | null |
296 | aca9241e-6ddd-11ea-bccb-ccda262736ce | https://socratic.org/questions/if-the-specific-heat-of-mercury-is-0-14-j-g-c-how-much-heat-is-required-to-raise | 1.8 kJ | start physical_unit 5 5 heat_energy kj qc_end physical_unit 5 5 7 10 specific_heat qc_end physical_unit 5 5 21 22 mass qc_end physical_unit 5 5 26 27 temperature qc_end physical_unit 5 5 29 30 temperature qc_end end | [{"type":"physical unit","value":"Required heat [OF] mercury [IN] kJ"}] | [{"type":"physical unit","value":"1.8 kJ"}] | [{"type":"physical unit","value":"Specific heat [OF] mercury [=] \\pu{0.14 J/(g * ℃)}"},{"type":"physical unit","value":"Mass [OF] mercury [=] \\pu{250.0 g}"},{"type":"physical unit","value":"Temperature1 [OF] mercury [=] \\pu{10 ℃}"},{"type":"physical unit","value":"Temperature2 [OF] mercury [=] \\pu{62 ℃}"}] | <h1 class="questionTitle" itemprop="name">If the specific heat of mercury is 0.14 J/g°C, how much heat is required to raise the temperature of 250.0g of mercury from 10°C to 62°C?</h1> | null | 1.8 kJ | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>A substance's <a href="http://socratic.org/chemistry/thermochemistry/specific-heat">specific heat</a> tells you how much heat is required to increase the mass of <mathjax>#"1 g"#</mathjax> of that substance by <mat... | <div class="answerText" itemprop="text">
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<div class="markdown"><p><mathjax>#"1.8 kJ"#</mathjax></p></div>
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</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>A substance's <a href="http://socratic.org/chemistry/thermoc... | <article>
<h1 class="questionTitle" itemprop="name">If the specific heat of mercury is 0.14 J/g°C, how much heat is required to raise the temperature of 250.0g of mercury from 10°C to 62°C?</h1>
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<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb... | If the specific heat of mercury is 0.14 J/g°C, how much heat is required to raise the temperature of 250.0g of mercury from 10°C to 62°C? | null |
297 | a8ecfe3b-6ddd-11ea-ad49-ccda262736ce | https://socratic.org/questions/what-is-the-formula-for-vanadium-v-phosphate | V3(PO4)5 | start chemical_formula qc_end substance 5 6 qc_end end | [{"type":"other","value":"Chemical Formula [OF] vanadium(V) phosphate [IN] default"}] | [{"type":"chemical equation","value":"V3(PO4)5"}] | [{"type":"substance name","value":"Vanadium(V) phosphate"}] | <h1 class="questionTitle" itemprop="name">What is the formula for vanadium(V) phosphate?</h1> | null | V3(PO4)5 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Vanadium(V) phosphate is an <strong>ionic compound</strong> made up of vanadium(V) cations and phosphate anions. </p>
<p>The <strong>(V)</strong> Roman numeral used to name the cation indicates that vanadium, a <em... | <div class="answerText" itemprop="text">
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<div>
<div class="markdown"><p><mathjax>#"V"_3("PO"_4)_5#</mathjax></p></div>
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<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>Vanadium(V) phosphate is an <strong>ionic compound</s... | <article>
<h1 class="questionTitle" itemprop="name">What is the formula for vanadium(V) phosphate?</h1>
<div class="clearfix">
<div class="breadcrumbs weak-text">
<span itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb">
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<span class="breadcrumb" itemprop="title">Chemistry... | What is the formula for vanadium(V) phosphate? | null |
298 | aa86c4a2-6ddd-11ea-9c91-ccda262736ce | https://socratic.org/questions/when-0-72-g-of-a-liquid-is-vaporized-at-110-c-and-0-967-atm-the-gas-occupies-a-v | C3H6 | start chemical_formula qc_end physical_unit 5 5 1 2 mass qc_end physical_unit 5 5 12 13 pressure qc_end physical_unit 5 5 9 10 temperature qc_end physical_unit 14 15 20 21 volume qc_end c_other OTHER qc_end end | [{"type":"other","value":"Chemical Formula [OF] the gas [IN] molecular"}] | [{"type":"chemical equation","value":"C3H6"}] | [{"type":"physical unit","value":"Mass [OF] the liquid [=] \\pu{0.72 g}"},{"type":"physical unit","value":"Pressure [OF] the liquid [=] \\pu{0.967 atm}"},{"type":"physical unit","value":"Temperature [OF] the liquid [=] \\pu{110 ℃}"},{"type":"physical unit","value":"Volume [OF] the gas [=] \\pu{0.559 L}"},{"type":"other... | <h1 class="questionTitle" itemprop="name">When 0.72 g of a liquid is vaporized at 110 C and 0.967 atm, the gas occupies a volume of 0.559 L. The empirical formula of the gas is CH2. What is the molecular formula of the gas?
Please give easy to follow, step by step instruction and the answer.?</h1> | null | C3H6 | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The idea here is that you need to use the <a href="http://socratic.org/chemistry/the-behavior-of-gases/ideal-gas-law">ideal gas law</a> equation to determine how many <strong>moles</strong> of gas you have in that ... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p><mathjax>#"C"_3"H"_6#</mathjax></p></div>
</div>
</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p>The idea here is that you need to use the <a href="http://... | <article>
<h1 class="questionTitle" itemprop="name">When 0.72 g of a liquid is vaporized at 110 C and 0.967 atm, the gas occupies a volume of 0.559 L. The empirical formula of the gas is CH2. What is the molecular formula of the gas?
Please give easy to follow, step by step instruction and the answer.?</h1>
<div cla... | When 0.72 g of a liquid is vaporized at 110 C and 0.967 atm, the gas occupies a volume of 0.559 L. The empirical formula of the gas is CH2. What is the molecular formula of the gas?
Please give easy to follow, step by step instruction and the answer.? | null |
299 | ab463db8-6ddd-11ea-8c4e-ccda262736ce | https://socratic.org/questions/58e5d06911ef6b52b5d7887d | 88259.01 g | start physical_unit 3 4 mass g qc_end physical_unit 16 16 20 21 concentration qc_end end | [{"type":"physical unit","value":"Mass [OF] sodium chloride [IN] g"}] | [{"type":"physical unit","value":"88259.01 g"}] | [{"type":"physical unit","value":"Volume [OF] NaCl(aq) solution [=] \\pu{350.00 L}"},{"type":"physical unit","value":"Concentration [OF] NaCl(aq) solution [=] \\pu{4.315 mol/L}"}] | <h1 class="questionTitle" itemprop="name">What mass of sodium chloride is required in the following scenario?</h1> | <div class="questionDetailsContainer">
<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p>A <mathjax>#350.00*L#</mathjax> volume of <mathjax>#NaCl(aq)#</mathjax> is required at <mathjax>#4.315*mol*L^-1#</mathjax> concentration. What mass of solute is required?<... | 88259.01 g | <div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#"Concentration"#</mathjax> <mathjax>#=#</mathjax> <mathjax>#"Moles of solute"/"Volume of solution"#</mathjax>.</p>
<p>And thus <mathjax>#"moles of solute"="concentration"xx"volume of solution"#</mathjax><... | <div class="answerText" itemprop="text">
<div class="answerSummary">
<div>
<div class="markdown"><p>You would need over <mathjax>#88*kg#</mathjax> of salt........</p></div>
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</div>
<div class="answerDescription">
<h4 class="answerHeader">Explanation:</h4>
<div>
<div class="markdown"><p><mathjax>#"Concentration"#<... | <article>
<h1 class="questionTitle" itemprop="name">What mass of sodium chloride is required in the following scenario?</h1>
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<div class="collapsedQuestionDetails">
<h2 class="questionDetails" itemprop="text">
<div class="markdown"><p>A <mathjax>#350.00*L#</mathjax> volume of <math... | What mass of sodium chloride is required in the following scenario? |
A #350.00*L# volume of #NaCl(aq)# is required at #4.315*mol*L^-1# concentration. What mass of solute is required?
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