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what you should be familiar with before this lesson the gcf ( greatest common factor ) of two or more monomials is the product of all their common prime factors . for example , the gcf of $ 6x $ and $ 4x^2 $ is $ 2x $ . if this is new to you , you 'll want to check out our greatest common factors of monomials article .... | what you should be familiar with before this lesson the gcf ( greatest common factor ) of two or more monomials is the product of all their common prime factors . for example , the gcf of $ 6x $ and $ 4x^2 $ is $ 2x $ . | in the last question , the length i put in was marked as wrong , so i went to the `` help '' button and followed my calculations , and the answer was the same as the answer i wrote , so why was it marked wrong ? |
what you should be familiar with before this lesson the gcf ( greatest common factor ) of two or more monomials is the product of all their common prime factors . for example , the gcf of $ 6x $ and $ 4x^2 $ is $ 2x $ . if this is new to you , you 'll want to check out our greatest common factors of monomials article .... | the resulting expression is in factored form because it is written as a product of two polynomials , whereas the original expression is a two-termed sum . check your understanding factoring out the greatest common factor ( gcf ) to factor the gcf out of a polynomial , we do the following : find the gcf of all the terms... | how to find gcd of a polynomial ? |
what you should be familiar with before this lesson the gcf ( greatest common factor ) of two or more monomials is the product of all their common prime factors . for example , the gcf of $ 6x $ and $ 4x^2 $ is $ 2x $ . if this is new to you , you 'll want to check out our greatest common factors of monomials article .... | if we start with $ 3x^2 ( 4x ) +3x^2 ( 3 ) $ , we can use the distributive property to factor out $ ~\teald { 3x^2 } $ and obtain $ 3x^2 ( 4x+3 ) $ . the resulting expression is in factored form because it is written as a product of two polynomials , whereas the original expression is a two-termed sum . check your unde... | why do i divide the gcf from the length of the two rectangles ? |
what you should be familiar with before this lesson the gcf ( greatest common factor ) of two or more monomials is the product of all their common prime factors . for example , the gcf of $ 6x $ and $ 4x^2 $ is $ 2x $ . if this is new to you , you 'll want to check out our greatest common factors of monomials article .... | step 1 : find the gcf $ 2x^3=\maroond2\cdot \goldd { x } \cdot \goldd { x } \cdot x $ $ 6x^2=\maroond2\cdot 3\cdot \goldd { x } \cdot \goldd { x } $ so the gcf of $ 2x^3-6x^2 $ is $ \maroond2 \cdot \goldd x \cdot \goldd x=\teald { 2x^2 } $ . step 2 : express each term as a product of $ \teald { 2x^2 } $ and another fac... | so the 14x^4 and the 6x^2 represent square meters and we have to find the lengths of the two rectangles to find the length of the bigger rectangle ? |
what you should be familiar with before this lesson the gcf ( greatest common factor ) of two or more monomials is the product of all their common prime factors . for example , the gcf of $ 6x $ and $ 4x^2 $ is $ 2x $ . if this is new to you , you 'll want to check out our greatest common factors of monomials article .... | step 1 : find the gcf $ 2x^3=\maroond2\cdot \goldd { x } \cdot \goldd { x } \cdot x $ $ 6x^2=\maroond2\cdot 3\cdot \goldd { x } \cdot \goldd { x } $ so the gcf of $ 2x^3-6x^2 $ is $ \maroond2 \cdot \goldd x \cdot \goldd x=\teald { 2x^2 } $ . step 2 : express each term as a product of $ \teald { 2x^2 } $ and another fac... | then we go on to find the width of the rectangle using area=length times width but i 'm confused with the part were we used gcf to get 2x^2 why would we do that and how do we get length ? |
what you should be familiar with before this lesson the gcf ( greatest common factor ) of two or more monomials is the product of all their common prime factors . for example , the gcf of $ 6x $ and $ 4x^2 $ is $ 2x $ . if this is new to you , you 'll want to check out our greatest common factors of monomials article .... | we factored out common binomial factors which resulted in an expression equal to the product of two binomials . for example $ x ( x+1 ) +2 ( x+1 ) = ( x+1 ) ( x+2 ) $ . while we may have used different techniques , in each case we are writing the polynomial as a product of two or more factors . | i am doing a math assignment where i have to factor x^4+4x^2 and the answer choices have imaginary numbers ? |
background multivariable functions the idea of transformations in all of our methods for visualizing multivariable functions , the goal is to somehow see the connection between the input and the output of a function . with graphs , this means plotting points whose coordinates include both input and output information .... | background multivariable functions the idea of transformations in all of our methods for visualizing multivariable functions , the goal is to somehow see the connection between the input and the output of a function . with graphs , this means plotting points whose coordinates include both input and output information . | what test book do you recommend ? |
background multivariable functions the idea of transformations in all of our methods for visualizing multivariable functions , the goal is to somehow see the connection between the input and the output of a function . with graphs , this means plotting points whose coordinates include both input and output information .... | $ f ( x , y ) = x^2 + y^2 $ , the corresponding transformation will squish the $ xy $ -plane onto the number line . such squishification can make it hard to follow everything that 's going on , so for the sake of a precise and clear description , you would be better off using a graph or a contour map . nevertheless , i... | what software are you using to make all these neat visualization ? |
background multivariable functions the idea of transformations in all of our methods for visualizing multivariable functions , the goal is to somehow see the connection between the input and the output of a function . with graphs , this means plotting points whose coordinates include both input and output information .... | $ f ( x , y ) = x^2 + y^2 $ , the corresponding transformation will squish the $ xy $ -plane onto the number line . such squishification can make it hard to follow everything that 's going on , so for the sake of a precise and clear description , you would be better off using a graph or a contour map . nevertheless , i... | can someone explain to me better what exactly the reflection question is ? |
background multivariable functions the idea of transformations in all of our methods for visualizing multivariable functions , the goal is to somehow see the connection between the input and the output of a function . with graphs , this means plotting points whose coordinates include both input and output information .... | why ? this transformation moves points in two-dimensional space to other points in two-dimensional space . for example , the point that starts at $ ( 1 , 0 ) $ ends at $ ( 0 , 1 ) $ . | is there a way of following the space to space transformation ? |
we know that $ i=\sqrt { -1 } $ and that $ i^2=-1 $ . but what about $ i^3 $ ? $ i^4 $ ? other integer powers of $ i $ ? how can we evaluate these ? finding $ i^3 $ and $ i^4 $ the properties of exponents can help us here ! in fact , when calculating powers of $ i $ , we can apply the properties of exponents that we kn... | it 's just the quotient ( without the remainder ) times $ 4 $ . let 's practice some problems problem 1 problem 2 problem 3 challenge problem | how to solve the problem i^x when x is a very huge prime number ? |
we know that $ i=\sqrt { -1 } $ and that $ i^2=-1 $ . but what about $ i^3 $ ? $ i^4 $ ? other integer powers of $ i $ ? how can we evaluate these ? finding $ i^3 $ and $ i^4 $ the properties of exponents can help us here ! in fact , when calculating powers of $ i $ , we can apply the properties of exponents that we kn... | again , using the fact that $ { i^2=-1 } $ , we have the following : $ \begin { align } i^4 & amp ; = { { i^2\cdot i^2 } } \ \ & amp ; = ( { -1 } ) \cdot ( { -1 } ) \ \ & amp ; = \goldd { 1 } \end { align } $ more powers of $ i $ let 's keep this going ! let 's find the next $ 4 $ powers of $ i $ using a similar method... | do you have to use powers of 4 to find the solution ? |
we know that $ i=\sqrt { -1 } $ and that $ i^2=-1 $ . but what about $ i^3 $ ? $ i^4 $ ? other integer powers of $ i $ ? how can we evaluate these ? finding $ i^3 $ and $ i^4 $ the properties of exponents can help us here ! in fact , when calculating powers of $ i $ , we can apply the properties of exponents that we kn... | larger powers of $ i $ suppose we now wanted to find $ i^ { 138 } $ . we could list the sequence $ \blued i $ , $ \greend { -1 } $ , $ \purpled { -i } $ , $ \goldd 1 $ , ... out to the $ 138^\text { th } $ term , but this would take too much time ! notice , however , that $ i^4=1 $ , $ i^8=1 $ , $ i^ { 12 } =1 $ , etc.... | how would i be used ? |
we know that $ i=\sqrt { -1 } $ and that $ i^2=-1 $ . but what about $ i^3 $ ? $ i^4 $ ? other integer powers of $ i $ ? how can we evaluate these ? finding $ i^3 $ and $ i^4 $ the properties of exponents can help us here ! in fact , when calculating powers of $ i $ , we can apply the properties of exponents that we kn... | but what about $ i^3 $ ? $ i^4 $ ? other integer powers of $ i $ ? | with larger exponents , do i always have to find a multiple of 4 in the exponent or can i use numbers less than 4 ? |
we know that $ i=\sqrt { -1 } $ and that $ i^2=-1 $ . but what about $ i^3 $ ? $ i^4 $ ? other integer powers of $ i $ ? how can we evaluate these ? finding $ i^3 $ and $ i^4 $ the properties of exponents can help us here ! in fact , when calculating powers of $ i $ , we can apply the properties of exponents that we kn... | we know that $ i=\sqrt { -1 } $ and that $ i^2=-1 $ . but what about $ i^3 $ ? | if we know that imaginary unit is square root of -1 , then why is it called imaginary unit ? |
röttgen pietà , c. 1300-25 , painted wood , 34 1/2 inches high ( rheinisches landesmuseum , bonn ) ( photo : ralf heinz , with permission ) an emotional response it is hard to look at the röttgen pietà and not feel something—perhaps revulsion , horror , or distaste . it is terrifying and the more you look at it , the m... | röttgen pietà , c. 1300-25 , painted wood , 34 1/2 inches high ( rheinisches landesmuseum , bonn ) ( photo : ralf heinz , with permission ) an emotional response it is hard to look at the röttgen pietà and not feel something—perhaps revulsion , horror , or distaste . it is terrifying and the more you look at it , the m... | could the artist have depicted jesus in this manner for other reasons ? |
what you should be familiar with before this lesson a monomial is an expression that is the product of constants and nonnegative integer powers of $ x $ , like $ 3x^2 $ . a polynomial is a sum of monomials . you can write the complete factorization of a monomial by writing the prime factorization of the coefficient and... | therefore , their greatest common factor is $ \blued2\cdot \goldd { x } $ or $ 2x $ . check your understanding a note on the variable part of the gcf in general , the variable part of the gcf for any two or more monomials will be equal to the variable part of the monomial with the lowest power of $ x $ . for example , ... | can a2 ( variable 'a ' square ) - 400 be factored ? |
what you should be familiar with before this lesson a monomial is an expression that is the product of constants and nonnegative integer powers of $ x $ , like $ 3x^2 $ . a polynomial is a sum of monomials . you can write the complete factorization of a monomial by writing the prime factorization of the coefficient and... | the product of all the common factors will be the gcf . for example , let 's find the greatest common factor of $ 10x^3 $ and $ 4x $ : $ 10x^3=\blued { 2 } \cdot 5\cdot \goldd { x } \cdot x\cdot x $ $ 4x=\blued { 2 } \cdot 2\cdot \goldd { x } $ notice that $ 10x^3 $ and $ 4x $ have one factor of $ \blued { 2 } $ and on... | in the last two problems , why could n't the solutions be 2x^76 and 4x^2y^2 ? |
what you should be familiar with before this lesson a monomial is an expression that is the product of constants and nonnegative integer powers of $ x $ , like $ 3x^2 $ . a polynomial is a sum of monomials . you can write the complete factorization of a monomial by writing the prime factorization of the coefficient and... | check your understanding a note on the variable part of the gcf in general , the variable part of the gcf for any two or more monomials will be equal to the variable part of the monomial with the lowest power of $ x $ . for example , consider the monomials $ \blued { 6 } \goldd { x^5 } $ and $ \blued { 4 } \goldd { x^2... | at number 5 ) it says that 4x ( to the power of 2 ) y ( to the power of 2 ) is not correct , why is it not since 4 fits into both 40 and 32 and x ( to the power of 2 ) and y ( to the power of 2 ) are both at there highest ? |
what you should be familiar with before this lesson a monomial is an expression that is the product of constants and nonnegative integer powers of $ x $ , like $ 3x^2 $ . a polynomial is a sum of monomials . you can write the complete factorization of a monomial by writing the prime factorization of the coefficient and... | for example , the gcf of $ 12 $ and $ 18 $ is $ 6 $ . we can find the gcf for any two numbers by examining their prime factorizations : $ 12=\blued { 2 } \cdot 2\cdot \goldd { 3 } $ $ 18=\blued { 2 } \cdot \goldd3\cdot 3 $ notice that $ 12 $ and $ 18 $ have a factor of $ \blued { 2 } $ and a factor of $ \goldd { 3 } $ ... | what is the greatest common factor of 20a^ { 2 } 20a 2 20 , a , start superscript , 2 , end superscript , 12a^ { 2 } 12a 2 12 , a , start superscript , 2 , end superscript , and 8a8a8 , a ? |
ancestor portraits we all know portraits can be made of ancestors , but can a portrait be an ancestor ? in te ao māori , the māori world , they can . paintings like this one—and even photographs—do two important things . they record likenesses and bring ancestral presence into the world of the living . in other words ,... | this portrait has been published in the google art project , which is why we can look at it here . tamati waka nene māori are the indigenous people of new zealand . the subject of this portrait , tamati waka nene , was a rangatira or chief of the ngāti hao people in hokianga , of the ngāpuhi iwi or tribe , and an impor... | how was new zealand made ? |
ancestor portraits we all know portraits can be made of ancestors , but can a portrait be an ancestor ? in te ao māori , the māori world , they can . paintings like this one—and even photographs—do two important things . they record likenesses and bring ancestral presence into the world of the living . in other words ,... | this portrait has been published in the google art project , which is why we can look at it here . tamati waka nene māori are the indigenous people of new zealand . the subject of this portrait , tamati waka nene , was a rangatira or chief of the ngāti hao people in hokianga , of the ngāpuhi iwi or tribe , and an impor... | did the influence of the chief 's with their people begin to wane during this period ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | however , regardless of its original use , here we have the first version of the walls joshua so ably conquered some six thousand years later . plastered human skulls the pre-pottery neolithic a period is followed by the pre-pottery neolithic b ( 7000-5200 bce ) , which was different from its predecessor in important w... | what are the mentioned a and b levels is that a different time period in the neolithic , or is it a reference to the level of the excavation ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | however , regardless of its original use , here we have the first version of the walls joshua so ably conquered some six thousand years later . plastered human skulls the pre-pottery neolithic a period is followed by the pre-pottery neolithic b ( 7000-5200 bce ) , which was different from its predecessor in important w... | what is the most widely excepted theroy surronding these skulls ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | shells were used for eyes and traces of paint revealed that skin and hair were also included in the representations . the largest group found together were nine examples , buried in the fill below the plastered floor of one house . jericho isn ’ t the only site at which plastered skulls have been found in pre-pottery n... | could the plastered skulls possibly be akin to sumerian votive figures like the ones found at tell asmar ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | this resource , which drew its first visitors between 10,000 and 9000 b.c.e. , still has descendants that live there today . biblical reference the site of jericho is best known for its identity in the bible and this has drawn pilgrims and explorers to it as early as the 4th century c.e . ; serious archaeological explo... | how respectable is it for a modern archaeologist to go looking for proof of something in the bible ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | archaeologists found remains of a very large settlement of circular homes made with mud brick and topped with domed roofs . as the name of this era implies , these early people at jericho had not yet figured out how to make pottery , but they made vessels out of stone , wove cloth and for tools were trading for a parti... | why was obsidian a `` particularly useful kind of stone '' ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | specifically , in the pre-pottery neolithic a levels at jericho ( 8500-7000 b.c.e . ) archaeologists found remains of a very large settlement of circular homes made with mud brick and topped with domed roofs . as the name of this era implies , these early people at jericho had not yet figured out how to make pottery , ... | do archaeologists think that the plaster covering the skulls was simply for adornment purposes , or were people trying to preserve or mummify them ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | what continues to draw archaeologists to jericho today is the hope of finding some evidence of the warrior joshua , who lead the israelites to an unlikely victory against the canaanites ( `` the walls of the city fell when joshua and his men marched around them blowing horns '' joshua 6:1-27 ) . although unequivocal ev... | what kinds of non-human predators were common during this time ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | as the name of this era implies , these early people at jericho had not yet figured out how to make pottery , but they made vessels out of stone , wove cloth and for tools were trading for a particularly useful kind of stone , obsidian , from as far away as çiftlik , in eastern turkey . the settlement grew quickly and ... | are there extinct kinds of animals that preyed on humans that the inhabitants of jericho would need to construct a wall to keep out ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | as the name of this era implies , these early people at jericho had not yet figured out how to make pottery , but they made vessels out of stone , wove cloth and for tools were trading for a particularly useful kind of stone , obsidian , from as far away as çiftlik , in eastern turkey . the settlement grew quickly and ... | despite having no proof of joshuah 's existence , is there archaeological evidence that proves the wall had a major collapse whilst under a major siege ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | houses in this era were uniformly rectangular and constructed with a new kind of rectangular mud bricks which were decorated with herringbone thumb impressions , and always laid lengthwise in thick mud mortar . this mortar , like a plaster , was also used to create a smooth surface on the interior walls , extending dow... | or is the supposed siege a metaphor like the majority of the christian bible ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | ; serious archaeological exploration didn ’ t begin until the latter half of the 19th century . what continues to draw archaeologists to jericho today is the hope of finding some evidence of the warrior joshua , who lead the israelites to an unlikely victory against the canaanites ( `` the walls of the city fell when j... | if it is believed that jericho existed during joshua 's time in the bible then why is there not any evidence to support such claims ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | ; serious archaeological exploration didn ’ t begin until the latter half of the 19th century . what continues to draw archaeologists to jericho today is the hope of finding some evidence of the warrior joshua , who lead the israelites to an unlikely victory against the canaanites ( `` the walls of the city fell when j... | was jericho part of an ancient civilization before joshua 's conquest ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | what continues to draw archaeologists to jericho today is the hope of finding some evidence of the warrior joshua , who lead the israelites to an unlikely victory against the canaanites ( `` the walls of the city fell when joshua and his men marched around them blowing horns '' joshua 6:1-27 ) . although unequivocal ev... | i ca n't imagine the people were looking hundreds of years in advance to avoid the formation of tells , so does this theory have to do with dust storms in the area piling sediment ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | but the first settlement at the site , around the ein as-sultan spring , dates to the early neolithic era , and these people , who built homes , grew plants , and kept animals , were among the earliest to do such anywhere in the world . specifically , in the pre-pottery neolithic a levels at jericho ( 8500-7000 b.c.e .... | how many levels of excavation are there in jericho ? |
a natural oasis the site of jericho , just north of the dead sea and due west of the jordan river , is one of the oldest continuously lived-in cities in the world . the reason for this may be found in its arabic name , ārīḥā , which means fragrant ; jericho is a natural oasis in the desert where countless fresh water s... | but the first settlement at the site , around the ein as-sultan spring , dates to the early neolithic era , and these people , who built homes , grew plants , and kept animals , were among the earliest to do such anywhere in the world . specifically , in the pre-pottery neolithic a levels at jericho ( 8500-7000 b.c.e .... | what kind of jobs could you get in ancient jericho ? |
overview herbert hoover was the 31st president of the united states . he served one term , from 1929 to 1933 . before becoming president , hoover directed relief efforts to supply war-torn europe and russia during and after the first world war . after the 1929 stock market crash , the hoover administration attempted to... | what were his most consequential shortcomings ? how would you characterize the hoover administration ’ s response to the great depression ? | why did the people in the great depression blame hoover for everything ? |
overview herbert hoover was the 31st president of the united states . he served one term , from 1929 to 1933 . before becoming president , hoover directed relief efforts to supply war-torn europe and russia during and after the first world war . after the 1929 stock market crash , the hoover administration attempted to... | what were his most consequential shortcomings ? how would you characterize the hoover administration ’ s response to the great depression ? | how would hoover 's presidency been different had he been able to help mitigate the effects of the great depression ? |
overview herbert hoover was the 31st president of the united states . he served one term , from 1929 to 1933 . before becoming president , hoover directed relief efforts to supply war-torn europe and russia during and after the first world war . after the 1929 stock market crash , the hoover administration attempted to... | hoover went on to serve as secretary of commerce in the administration of warren g. harding . the presidency of herbert hoover hoover won the republican nomination in the 1928 presidential election after republican president calvin coolidge announced that he would not be running for reelection . hoover campaigned on co... | who did hoover run against in the 1928 election ? |
overview herbert hoover was the 31st president of the united states . he served one term , from 1929 to 1933 . before becoming president , hoover directed relief efforts to supply war-torn europe and russia during and after the first world war . after the 1929 stock market crash , the hoover administration attempted to... | however , many of these policies were not immediately effective , and some of the administration ’ s actions actually worsened the effects of the depression . the smoot-hawley tariff act , for instance , which hoover signed reluctantly , raised tariffs on thousands of imported goods and initiated a trade war between th... | if tariffs caused a trade war , then it caused further damage to the economy , is that is why jobs were lost and the depression grew deeper ? |
overview herbert hoover was the 31st president of the united states . he served one term , from 1929 to 1933 . before becoming president , hoover directed relief efforts to supply war-torn europe and russia during and after the first world war . after the 1929 stock market crash , the hoover administration attempted to... | what were his most consequential shortcomings ? how would you characterize the hoover administration ’ s response to the great depression ? | or is that the ball ( depression ) was sliding down the hillside and just kept growing until millions were out of work ? |
overview herbert hoover was the 31st president of the united states . he served one term , from 1929 to 1933 . before becoming president , hoover directed relief efforts to supply war-torn europe and russia during and after the first world war . after the 1929 stock market crash , the hoover administration attempted to... | however , many of these policies were not immediately effective , and some of the administration ’ s actions actually worsened the effects of the depression . the smoot-hawley tariff act , for instance , which hoover signed reluctantly , raised tariffs on thousands of imported goods and initiated a trade war between th... | is it true then that by placing tariffs we bought less of their goods , put their workers out of a job and the same happened here ? |
introduction just as a journey of a thousand miles begins with a single step , so a complex signaling pathway inside of a cell begins with a single key event – the binding of a signaling molecule , or ligand , to its receiving molecule , or receptor . receptors and ligands come in many forms , but they all have one thi... | some are proteins , others are hydrophobic molecules like steroids , and others yet are gases like nitric oxide . here , we ’ ll look at some examples of different types of ligands . ligands that can enter the cell small , hydrophobic ligands can pass through the plasma membrane and bind to intracellular receptors in t... | would n't lipid ligands generally be hydrophobic ? |
introduction just as a journey of a thousand miles begins with a single step , so a complex signaling pathway inside of a cell begins with a single key event – the binding of a signaling molecule , or ligand , to its receiving molecule , or receptor . receptors and ligands come in many forms , but they all have one thi... | some are proteins , others are hydrophobic molecules like steroids , and others yet are gases like nitric oxide . here , we ’ ll look at some examples of different types of ligands . ligands that can enter the cell small , hydrophobic ligands can pass through the plasma membrane and bind to intracellular receptors in t... | why do n't hydrophobic ligands get stuck in the membrane ? |
introduction just as a journey of a thousand miles begins with a single step , so a complex signaling pathway inside of a cell begins with a single key event – the binding of a signaling molecule , or ligand , to its receiving molecule , or receptor . receptors and ligands come in many forms , but they all have one thi... | a kinase is just a name for an enzyme that transfers phosphate groups to a protein or other target , and an receptor tyrosine kinase transfers phosphate groups to specifically to the amino acid tyrosine . how does rtk signaling work ? in a typical example , signaling molecules first bind to the extracellular domains of... | what are considered kinases : an rtk receptor or an rtk 's specialized ligand ? |
introduction just as a journey of a thousand miles begins with a single step , so a complex signaling pathway inside of a cell begins with a single key event – the binding of a signaling molecule , or ligand , to its receiving molecule , or receptor . receptors and ligands come in many forms , but they all have one thi... | vitamin d , a molecule synthesized in the skin using energy from light , is another example of a steroid hormone . because they are hydrophobic , these hormones don ’ t have trouble crossing the plasma membrane , but they must bind to carrier proteins in order to travel through the ( watery ) bloodstream . nitric oxide... | why do they [ hormones ] need to bind to carrier proteins ? |
introduction just as a journey of a thousand miles begins with a single step , so a complex signaling pathway inside of a cell begins with a single key event – the binding of a signaling molecule , or ligand , to its receiving molecule , or receptor . receptors and ligands come in many forms , but they all have one thi... | hormone binding exposes regions of the receptor that have dna-binding activity , meaning they can attach to specific sequences of dna . these sequences are found next to certain genes in the dna of the cell , and when the receptor binds next to these genes , it alters their level of transcription . many signaling pathw... | is it also via genes - > rna - > codes for proteins to `` make '' the receptor in a ribosome ? |
introduction just as a journey of a thousand miles begins with a single step , so a complex signaling pathway inside of a cell begins with a single key event – the binding of a signaling molecule , or ligand , to its receiving molecule , or receptor . receptors and ligands come in many forms , but they all have one thi... | peptide ligands can range from just a few amino acids long , as in the pain-suppressing enkephalins , to a hundred or more amino acids in length $ ^9 $ . as mentioned above , some neurotransmitters are proteins . many other neurotransmitters , however , are small , hydrophilic ( water-loving ) organic molecules . | is it just that a chain of proteins is brought to the membrane via vesicles ? |
introduction just as a journey of a thousand miles begins with a single step , so a complex signaling pathway inside of a cell begins with a single key event – the binding of a signaling molecule , or ligand , to its receiving molecule , or receptor . receptors and ligands come in many forms , but they all have one thi... | a kinase is just a name for an enzyme that transfers phosphate groups to a protein or other target , and an receptor tyrosine kinase transfers phosphate groups to specifically to the amino acid tyrosine . how does rtk signaling work ? in a typical example , signaling molecules first bind to the extracellular domains of... | where does the energy come from to create signaling cascades from an extracellular signal ? |
introduction just as a journey of a thousand miles begins with a single step , so a complex signaling pathway inside of a cell begins with a single key event – the binding of a signaling molecule , or ligand , to its receiving molecule , or receptor . receptors and ligands come in many forms , but they all have one thi... | the size and structure of these regions can vary a lot depending on the type of receptor , and the hydrophobic region may consist of multiple stretches of amino acids that criss-cross the membrane . there are many kinds of cell-surface receptors , but here we ’ ll look at three common types : ligand-gated ion channels ... | are hydrophobicity and receptors affinity towards the ligand indirectly proportional ? |
introduction just as a journey of a thousand miles begins with a single step , so a complex signaling pathway inside of a cell begins with a single key event – the binding of a signaling molecule , or ligand , to its receiving molecule , or receptor . receptors and ligands come in many forms , but they all have one thi... | for at least some types of gpcrs , the inactive receptor is already docked to its signaling target , a g protein $ ^4 $ . g proteins come in different types , but they all bind the nucleotide guanosine triphosphate ( gtp ) , which they can break down ( hydrolyze ) to form gdp . a g protein attached to gtp is active , o... | do g proteins bind to gtp which will be turned naturally into gdp after a period of time by the g protein and then have it 's gdp returned to a gtp when the gpcr is activated ? |
introduction just as a journey of a thousand miles begins with a single step , so a complex signaling pathway inside of a cell begins with a single key event – the binding of a signaling molecule , or ligand , to its receiving molecule , or receptor . receptors and ligands come in many forms , but they all have one thi... | binding of a ligand to a receptor changes its shape or activity , allowing it to transmit a signal or directly produce a change inside of the cell in this section , we ’ ll look at different types of receptors and ligands , seeing how they interact to turn information from outside the cell into a change inside the cell... | what types of signal molecule that are likely to use intracellular receptors ? |
introduction just as a journey of a thousand miles begins with a single step , so a complex signaling pathway inside of a cell begins with a single key event – the binding of a signaling molecule , or ligand , to its receiving molecule , or receptor . receptors and ligands come in many forms , but they all have one thi... | however , intracellular receptors are unique because they cause these changes very directly , binding to the dna and altering transcription themselves . cell-surface receptors cell-surface receptors are membrane-anchored proteins that bind to ligands on the outside surface of the cell . in this type of signaling , the ... | are cell surface receptors also called 'extra cellular receptors '' ? |
introduction just as a journey of a thousand miles begins with a single step , so a complex signaling pathway inside of a cell begins with a single key event – the binding of a signaling molecule , or ligand , to its receiving molecule , or receptor . receptors and ligands come in many forms , but they all have one thi... | intracellular receptors intracellular receptors are receptor proteins found on the inside of the cell , typically in the cytoplasm or nucleus . in most cases , the ligands of intracellular receptors are small , hydrophobic ( water-hating ) molecules , since they must be able to cross the plasma membrane in order to rea... | `` the ligands of intracellular receptors are small , hydrophobic ( water-hating ) molecules , since they must be able to cross the plasma membrane '' how would that get past the phosphorate heads of the phospholipds ? |
introduction just as a journey of a thousand miles begins with a single step , so a complex signaling pathway inside of a cell begins with a single key event – the binding of a signaling molecule , or ligand , to its receiving molecule , or receptor . receptors and ligands come in many forms , but they all have one thi... | neurons , or nerve cells , have ligand-gated channels that are bound by neurotransmitters . g protein-coupled receptors g protein-coupled receptors ( gpcrs ) are a large family of cell surface receptors that share a common structure and method of signaling . the members of the gpcr family all have seven different prote... | how does the structure of the chemical relate to the effect ? |
background partial derivatives gradient what we 're building to if you have some multivariable function , $ f ( x , y ) $ and some vector in the function 's input space , $ \vec { \textbf { v } } $ , the directional derivative of $ f $ along $ \vec { \textbf { v } } $ tells you the rate at which $ f $ will change while... | alternate definition of directional derivative : $ \begin { align } \quad \nabla_ { \vec { \textbf { v } } } f ( \textbf { x } ) = \lim_ { h \to 0 } \dfrac { f ( \textbf { x } + h\vec { \textbf { v } } ) - f ( \textbf { x } ) } { h\bluee { ||\vec { \textbf { v } } || } } \end { align } $ personally , i think this defin... | in example 3 , is there an error ? |
background partial derivatives gradient what we 're building to if you have some multivariable function , $ f ( x , y ) $ and some vector in the function 's input space , $ \vec { \textbf { v } } $ , the directional derivative of $ f $ along $ \vec { \textbf { v } } $ tells you the rate at which $ f $ will change while... | we can express such a nudge as an addition of $ h\vec { \textbf { v } } $ to an input point $ \textbf { x } _0 $ , where $ h $ is thought of as some small number . the magnitude of this nudge is $ h ||\vec { \textbf { v } } || $ . the resulting change in the output of $ f $ can be approximated by multiplying this littl... | if h is an infinitsimal why does the magnitude of v matter ? |
background partial derivatives gradient what we 're building to if you have some multivariable function , $ f ( x , y ) $ and some vector in the function 's input space , $ \vec { \textbf { v } } $ , the directional derivative of $ f $ along $ \vec { \textbf { v } } $ tells you the rate at which $ f $ will change while... | the directional derivative of $ f $ along $ \vec { \textbf { v } } $ is the resulting rate of change in the output of the function . so , for example , multiplying the vector $ \vec { \textbf { v } } $ by two would double the value of the directional derivative since all changes would be happening twice as fast . notat... | even if it would matter would n't it be better to aproach the vector 's magnitude to zero too ? |
background partial derivatives gradient what we 're building to if you have some multivariable function , $ f ( x , y ) $ and some vector in the function 's input space , $ \vec { \textbf { v } } $ , the directional derivative of $ f $ along $ \vec { \textbf { v } } $ tells you the rate at which $ f $ will change while... | is there an operation which tells us how the height of the graph above the tip of $ \vec { \textbf { v } } $ compares to the height of the graph above its tail ? as you have probably guessed , there is a new type of derivative , called the directional derivative , which answers this question . just as the partial deriv... | whats the difference between directional derivative and slope ? |
background partial derivatives gradient what we 're building to if you have some multivariable function , $ f ( x , y ) $ and some vector in the function 's input space , $ \vec { \textbf { v } } $ , the directional derivative of $ f $ along $ \vec { \textbf { v } } $ tells you the rate at which $ f $ will change while... | background partial derivatives gradient what we 're building to if you have some multivariable function , $ f ( x , y ) $ and some vector in the function 's input space , $ \vec { \textbf { v } } $ , the directional derivative of $ f $ along $ \vec { \textbf { v } } $ tells you the rate at which $ f $ will change while... | is n't the directional derivative just computing the rate at which f will change while the input moves along v , which is a lengthier way of describing the slope ? |
background partial derivatives gradient what we 're building to if you have some multivariable function , $ f ( x , y ) $ and some vector in the function 's input space , $ \vec { \textbf { v } } $ , the directional derivative of $ f $ along $ \vec { \textbf { v } } $ tells you the rate at which $ f $ will change while... | player 1 , the function : $ f ( x , y ) = \sin ( xy ) $ player 2 , the point : $ ( x_0 , y_0 ) = \left ( \dfrac { \pi } { 3 } , \dfrac { 1 } { 2 } \right ) $ player 3 , the vector : $ \vec { \textbf { v } } = 2 \hat { \textbf { i } } + 3 \hat { \textbf { j } } $ what is the slope of the graph of $ f $ at the point $ ( ... | what does it mean to `` normalize '' a vector ? |
background partial derivatives gradient what we 're building to if you have some multivariable function , $ f ( x , y ) $ and some vector in the function 's input space , $ \vec { \textbf { v } } $ , the directional derivative of $ f $ along $ \vec { \textbf { v } } $ tells you the rate at which $ f $ will change while... | $ \begin { align } \nabla f ( 2 , -3 ) = \left [ \begin { array } { c } 2 ( 2 ) - ( -3 ) \ - ( 2 ) \end { array } \right ] = \left [ \begin { array } { c } 7 \ -2 \end { array } \right ] \end { align } $ to get the desired directional derivative , we take the dot product between this gradient and $ \textbf { v } $ : fi... | are there any mathematical prove of the directional derivatives ? |
background partial derivatives gradient what we 're building to if you have some multivariable function , $ f ( x , y ) $ and some vector in the function 's input space , $ \vec { \textbf { v } } $ , the directional derivative of $ f $ along $ \vec { \textbf { v } } $ tells you the rate at which $ f $ will change while... | answer : since we are finding slope , we must first normalize the vector in question . the magnitude $ ||\textbf { v } || $ is $ \sqrt { 2^2 + 3^2 } = \sqrt { 13 } $ , so we divide each term by $ \sqrt { 13 } $ to get the resulting unit vector $ \hat { \textbf { u } } $ in the direction of $ \textbf { v } $ : next , fi... | in example 3 , should n't the unit vector u in the direction of v be 2/ ( 13 ) ^ ( 1/2 ) i + 3/ ( 13 ) ^ ( 1/2 ) j ? |
background partial derivatives gradient what we 're building to if you have some multivariable function , $ f ( x , y ) $ and some vector in the function 's input space , $ \vec { \textbf { v } } $ , the directional derivative of $ f $ along $ \vec { \textbf { v } } $ tells you the rate at which $ f $ will change while... | however , this might not always be what you want . the slope of a graph in the direction of $ \vec { \textbf { v } } $ , for example , depends only on the direction of $ \vec { \textbf { v } } $ , not the magnitude $ |\vec { \textbf { v } } | $ . let 's see why . | can you cite an example where i can find the rate of change of a certain temperature in the direction towards a point if the direction of a vector is not given ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | let 's write the half-reactions for another example reaction : $ \text { al } ( s ) + \text { cu } ^ { 2+ } ( aq ) \rightarrow \text { al } ^ { 3+ } ( aq ) + \text { cu } ( s ) $ is the above reaction balanced ? our atoms appear to be balanced : we have $ 1\ , \text { al } $ atom and $ 1\ , \text { cu } $ atom on each ... | what is the `` aq '' in the parentheses on problem 1 ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | for each of these examples , take a minute to figure out what is getting reduced and oxidized ! $ 1.~ $ combustion reactions a combustion reaction is a redox reaction between a compound and molecular oxygen ( $ \text o_2 $ ) to form oxygen-containing products . when one of the reactants is a hydrocarbon , the products ... | where does the water from the combustion example go ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | the following reaction is for the disproportionation of hypochlorite , $ \text { clo } ^- $ : $ 3\text { clo } ^- ( aq ) \rightarrow \text { clo } _3^- ( aq ) + 2\text { cl } ^- ( aq ) $ if we analyze the oxidation numbers for chlorine , we see that the reactant $ \text { clo } ^- $ is being oxidized to $ \text { clo }... | can a oxidation number be +1.6667 or decimal of some sort as with 3clo- o= -2 therefore 3xo = -6 therefore 3xcl must = +5 so 1cl equals 1.6666667 or +5 divided by the 3cl or have i lost the plot ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | $ 1.~ $ combustion reactions a combustion reaction is a redox reaction between a compound and molecular oxygen ( $ \text o_2 $ ) to form oxygen-containing products . when one of the reactants is a hydrocarbon , the products include carbon dioxide and water . the following reaction is the combustion of octane , a hydroc... | what do you mean by saying `` we can check to see if any reactants and products appear on both side '' ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | $ 2.~ $ if this is a redox reaction , what is being reduced and oxidized ? $ 3.~ $ what is the reducing agent in this reaction ? $ 4.~ $ what is the oxidizing agent in this reaction ? | how 2fe2o3 is oxidising agent it gaining electrons it should reducing agent ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | we can balance the charges by including the electrons being transferred , and then we will get our reduction half-reaction : $ \text { cu } ^ { 2+ } ( aq ) +2e^-\rightarrow \text { cu } ( s ) ~~~~~~~~~~~~~~~~~~\blued { \text { reduction half-reaction } } $ the balanced half-reaction tells us that $ \text { cu } ^ { 2+ ... | problem 1 - on the oxidation half-reaction , how did the electrons become 2 ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | there is a net charge of $ 2+ $ on the reactant side and $ 0 $ on the product side . we can balance the charges by including the electrons being transferred , and then we will get our reduction half-reaction : $ \text { cu } ^ { 2+ } ( aq ) +2e^-\rightarrow \text { cu } ( s ) ~~~~~~~~~~~~~~~~~~\blued { \text { reductio... | ( ex : 2h+ + 2e- - > h2 ) - i understand why h+ became 2 to balance the h2 in products but are n't the electrons only to balance the oxidation state ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are everywhere ! your body uses redox reactions to convert food and oxygen to energy plus water and $ \text { co } _2 $ , which we then exhale . | can someone please explain redox reactions in photosynthesis ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | we can balance the charges by including the electrons being transferred , and then we will get our reduction half-reaction : $ \text { cu } ^ { 2+ } ( aq ) +2e^-\rightarrow \text { cu } ( s ) ~~~~~~~~~~~~~~~~~~\blued { \text { reduction half-reaction } } $ the balanced half-reaction tells us that $ \text { cu } ^ { 2+ ... | how can electrons be shared within an atom ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | we can follow the trail of electrons to the oxidation half-reaction . oxidation half-reaction : the oxidation half-reaction shows the reactants and products participating in the oxidation step . this reaction will include the oxidation of $ \text { al } ( s ) $ to $ \text { al } ^ { 3+ } $ , and we will also want to ma... | how come the oxidation agent is not simply fe aswell ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | our reaction is balanced for both mass and charge . summary we can identify redox reactions by checking for changes in oxidation number . redox reactions can be split into oxidation and reduction half-reactions . | is there a way of finding the oxidation number of a constituent without having to remember the oxidation number of oxygen , florine or other elements ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | we can follow the trail of electrons to the oxidation half-reaction . oxidation half-reaction : the oxidation half-reaction shows the reactants and products participating in the oxidation step . this reaction will include the oxidation of $ \text { al } ( s ) $ to $ \text { al } ^ { 3+ } $ , and we will also want to ma... | how do you find the oxidation numbers on the c8h18 in the combustion reaction ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | the following reaction is for the disproportionation of hypochlorite , $ \text { clo } ^- $ : $ 3\text { clo } ^- ( aq ) \rightarrow \text { clo } _3^- ( aq ) + 2\text { cl } ^- ( aq ) $ if we analyze the oxidation numbers for chlorine , we see that the reactant $ \text { clo } ^- $ is being oxidized to $ \text { clo }... | should n't 1 electron be added to the 2h^+ because the oxidation number is 1 ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | another way to think of this that we want to make sure that any electrons that are released in the oxidation half-reaction get used up in the reduction half-reaction . otherwise we would have stray electrons floating around ! that means we need the number of electrons being transferred in each half-reaction to be equal... | electrons can not be transferred in fractions right ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | we can follow the trail of electrons to the oxidation half-reaction . oxidation half-reaction : the oxidation half-reaction shows the reactants and products participating in the oxidation step . this reaction will include the oxidation of $ \text { al } ( s ) $ to $ \text { al } ^ { 3+ } $ , and we will also want to ma... | so would the oxidation half reaction be co- > co2+ +2e ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | if we find the oxidation numbers for each atom in the reactants and products , we get the following : $ 2 \text { fe } _2 \text o_3 ( s ) + 3 \text c ( s ) \rightarrow 4 \text { fe } ( s ) + 3 \text { co } _2 ( g ) $ $ \purplec { ~~~\downarrow~~~~\downarrow ~~~~~~~~~~~~~~\downarrow~~~~~~~~~~~~~~~\downarrow~~~~~~~~~~~~~... | is oxidation number of o always 2- ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | when one of the reactants is a hydrocarbon , the products include carbon dioxide and water . the following reaction is the combustion of octane , a hydrocarbon . octane is a component of gasoline , and this combustion reaction occurs in the engine of most cars : $ 2\text c_8 \text h_ { 18 } + 25 \text o_2 \rightarrow 1... | for the combustion of octane , what is the oxidation number of carbon in octane ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | our reaction is balanced for both mass and charge . summary we can identify redox reactions by checking for changes in oxidation number . redox reactions can be split into oxidation and reduction half-reactions . | can an oxidation number be a fraction ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | our reaction is balanced for both mass and charge . summary we can identify redox reactions by checking for changes in oxidation number . redox reactions can be split into oxidation and reduction half-reactions . | so you do n't consider the coefficient in a molecule when finding an oxidation number and only think about the ratio of subscripts ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | can you find other examples of redox reactions happening around you ? an example and important terms redox reactions have some associated terms you should be comfortable using . we will go over these terms using the following example reaction : $ 2 \text { fe } _2 \text o_3 ( s ) + 3 \text c ( s ) \rightarrow 4 \text {... | how to calculate ph of a solution without using log ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | that means we need the number of electrons being transferred in each half-reaction to be equal . we can multiply the reduction half-reaction by $ 3 $ and multiply the oxidation half-reaction by $ 2 $ so both reactions involve the transfer of $ 6 $ electrons : $ \redd { 3 } \times [ \text { cu } ^ { 2+ } ( aq ) + { 2e^-... | it 's been mentioned a few times now , and i have a vague idea of what it is , but what does it actually mean by species ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are everywhere ! your body uses redox reactions to convert food and oxygen to energy plus water and $ \text { co } _2 $ , which we then exhale . | what is the significance of balancing redox reactions ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | our reaction is balanced for both mass and charge . summary we can identify redox reactions by checking for changes in oxidation number . redox reactions can be split into oxidation and reduction half-reactions . | when do you multiply by the subscript to find the oxidation number ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . | could someone explain why the combustion of octane is a redox reaction ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | let 's write the half-reactions for another example reaction : $ \text { al } ( s ) + \text { cu } ^ { 2+ } ( aq ) \rightarrow \text { al } ^ { 3+ } ( aq ) + \text { cu } ( s ) $ is the above reaction balanced ? our atoms appear to be balanced : we have $ 1\ , \text { al } $ atom and $ 1\ , \text { cu } $ atom on each ... | is loss of electrons from one atom in a compound only possible if the other atom is more electronegative ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | $ 1.~ $ combustion reactions a combustion reaction is a redox reaction between a compound and molecular oxygen ( $ \text o_2 $ ) to form oxygen-containing products . when one of the reactants is a hydrocarbon , the products include carbon dioxide and water . the following reaction is the combustion of octane , a hydroc... | how to certain reactants and certain products have these charges and others do n't ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | however , when we add up the charges on the reactant side we get a $ 2+ $ charge , which is not the same as the $ 3+ $ charge on the product side . we need to make sure both the atoms and the charges are balanced ! we will use the half-reaction method to balance the reaction . | can we calculate these charges ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | at the same time , the chlorine in some other molecules of $ \text { clo } ^- $ are being reduced to $ \text { cl } ^- $ ( where the oxidation number decreases from $ +1 $ to $ -1 $ ) . oxygen has an oxidation number of $ -2 $ in both $ \text { clo } ^- $ and $ \text { clo } _3^- $ , so it does not get oxidized or redu... | how does oxygen always have an oxidation number of -2 ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | we can balance the charges by including the electrons being transferred , and then we will get our reduction half-reaction : $ \text { cu } ^ { 2+ } ( aq ) +2e^-\rightarrow \text { cu } ( s ) ~~~~~~~~~~~~~~~~~~\blued { \text { reduction half-reaction } } $ the balanced half-reaction tells us that $ \text { cu } ^ { 2+ ... | is it not possible that in a compound it gains only one electron or gives away its electrons ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | if we find the oxidation numbers for each atom in the reactants and products , we get the following : $ 2 \text { fe } _2 \text o_3 ( s ) + 3 \text c ( s ) \rightarrow 4 \text { fe } ( s ) + 3 \text { co } _2 ( g ) $ $ \purplec { ~~~\downarrow~~~~\downarrow ~~~~~~~~~~~~~~\downarrow~~~~~~~~~~~~~~~\downarrow~~~~~~~~~~~~~... | does it always have to gain 2 electrons ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | when one of the reactants is a hydrocarbon , the products include carbon dioxide and water . the following reaction is the combustion of octane , a hydrocarbon . octane is a component of gasoline , and this combustion reaction occurs in the engine of most cars : $ 2\text c_8 \text h_ { 18 } + 25 \text o_2 \rightarrow 1... | in the combustion reaction of octane does the carbon atom in the octane molecule have an oxidation number of -2.25 to neutralize the hyrdrogen ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | since $ \text { cu } ^ { 2+ } $ is being reduced to $ \text { cu } ( s ) $ , we might start by writing out that step : $ \text { cu } ^ { 2+ } ( aq ) \rightarrow \text { cu } ( s ) $ however , this is not the correct half-reaction , because it is not charge-balanced . there is a net charge of $ 2+ $ on the reactant sid... | in the above example h has a charge of 1+ why are 2 electrons added to the half reaction of h to get a charge of 0 ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . | how can it be used to predict if a reaction is redox or not ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | we can follow the trail of electrons to the oxidation half-reaction . oxidation half-reaction : the oxidation half-reaction shows the reactants and products participating in the oxidation step . this reaction will include the oxidation of $ \text { al } ( s ) $ to $ \text { al } ^ { 3+ } $ , and we will also want to ma... | can oxidation number be decimal , in the above combustion reaction example oxidation number of carbon is -2.25 in c8h18 if so then what does it means since oxidation number shows transfer of electrons ? |
what is a redox reaction ? a redox ( or oxidation-reduction ) reaction is a type of chemical reaction that involves a transfer of electrons between two species . we can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products . redox reactions are... | summary we can identify redox reactions by checking for changes in oxidation number . redox reactions can be split into oxidation and reduction half-reactions . we can use the half-reaction method to balance redox reactions , which requires that both mass and charge are balanced . | what are the examples of oxidation and reduction in daily life ? |
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