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what should i know before starting biology ? if you are curious about biology or plan to study it in the future , you may be wondering what `` prerequisites '' it has – that is , what other knowledge will give you a solid foundation to learn biology . if so , big kudos for thinking ahead ! in my opinion , the only stri... | what should i know before starting biology ? if you are curious about biology or plan to study it in the future , you may be wondering what `` prerequisites '' it has – that is , what other knowledge will give you a solid foundation to learn biology . | what is meiosis and where the sperms of male are deposit ? |
what should i know before starting biology ? if you are curious about biology or plan to study it in the future , you may be wondering what `` prerequisites '' it has – that is , what other knowledge will give you a solid foundation to learn biology . if so , big kudos for thinking ahead ! in my opinion , the only stri... | what should i know before starting biology ? if you are curious about biology or plan to study it in the future , you may be wondering what `` prerequisites '' it has – that is , what other knowledge will give you a solid foundation to learn biology . | what is eukaryotic and prokaryotic ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | this regulation makes sure that cells do n't divide under unfavorable conditions ( for instance , when their dna is damaged , or when there is n't room for more cells in a tissue or organ ) . cell cycle checkpoints a checkpoint is a stage in the eukaryotic cell cycle at which at which the cell examines internal and ext... | for each of the three main checkpoints in the cell cycle , indicates what could happen if the checkpoint did n't function ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | if the checkpoint mechanisms detect problems with the dna , the cell cycle is halted , and the cell attempts to either complete dna replication or repair the damaged dna . if the damage is irreparable , the cell may undergo apoptosis , or programmed cell death $ ^2 $ . this self-destruction mechanism ensures that damag... | so g1 and g2 checkpoints both check for cell damage ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | because the separation of the sister chromatids during anaphase is an irreversible step , the cycle will not proceed until all the chromosomes are firmly attached to at least two spindle fibers from opposite poles of the cell . how does this checkpoint work ? it seems that cells do n't actually scan the metaphase plate... | do the lines in the diagrams symbolize where in the cycle the checkpoint is occurring ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | some cells stay permanently in g $ _0 $ , while others resume dividing if conditions improve . # # the g $ _2 $ checkpoint to make sure that cell division goes smoothly ( produces healthy daughter cells with complete , undamaged dna ) , the cell has an additional checkpoint before m phase , called the g $ _2 $ checkpoi... | if so , is n't the g1 checkpoint supposed to occur before the g0 phase ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . | what happens to those cells who has not satisfied the checking that is made during the g1 phase ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | this self-destruction mechanism ensures that damaged dna is not passed on to daughter cells and is important in preventing cancer . the spindle checkpoint the m checkpoint is also known as the spindle checkpoint : here , the cell examines whether all the sister chromatids are correctly attached to the spindle microtubu... | does the spindle checkpoint play a role in inducing mitotic catastrophe ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | how do the checkpoints actually work ? this article gives a high-level overview of cell cycle control , outlining the factors that influence a cell ’ s decision to pause or progress at each checkpoint . however , you may be wondering what these factors actually do to the cell , or change inside of it , to cause ( or bl... | or does it only serve to pause the cell cycle ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . | can cells go through apoptosis in g0 phase ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | here are some of the factors a cell might assess : size . is the cell large enough to divide ? nutrients . | for cells that normally do not divide ( such as neurones ) , is it possible to purposefully induce cell division ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | some cells stay permanently in g $ _0 $ , while others resume dividing if conditions improve . # # the g $ _2 $ checkpoint to make sure that cell division goes smoothly ( produces healthy daughter cells with complete , undamaged dna ) , the cell has an additional checkpoint before m phase , called the g $ _2 $ checkpoi... | if a cell becomes cancerous , what is the checkpoint it will bypass ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | this self-destruction mechanism ensures that damaged dna is not passed on to daughter cells and is important in preventing cancer . the spindle checkpoint the m checkpoint is also known as the spindle checkpoint : here , the cell examines whether all the sister chromatids are correctly attached to the spindle microtubu... | are spindle fibers the same thing as spindle microtubules ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | they use information about their own internal state and cues from the environment around them to decide whether to proceed with cell division . this regulation makes sure that cells do n't divide under unfavorable conditions ( for instance , when their dna is damaged , or when there is n't room for more cells in a tiss... | what happens if the cell ca n't pass the checkpoints ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | some cells stay permanently in g $ _0 $ , while others resume dividing if conditions improve . # # the g $ _2 $ checkpoint to make sure that cell division goes smoothly ( produces healthy daughter cells with complete , undamaged dna ) , the cell has an additional checkpoint before m phase , called the g $ _2 $ checkpoi... | what would happen if a cell bypasses a checkpoint ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | here are some of the factors a cell might assess : size . is the cell large enough to divide ? nutrients . | what happens when cytokinesis does not undergo ... does the cell not divide and have two nuclei ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | dna replication . was the dna completely copied during s phase ? if errors or damage are detected , the cell will pause at the g $ _2 $ checkpoint to allow for repairs . | what happens in the g2 phase ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | if the checkpoint mechanisms detect problems with the dna , the cell cycle is halted , and the cell attempts to either complete dna replication or repair the damaged dna . if the damage is irreparable , the cell may undergo apoptosis , or programmed cell death $ ^2 $ . this self-destruction mechanism ensures that damag... | why is it important for the cell to produce proteins before dividing ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around them to decide whether to proceed with cell division . | what occurs when they ( the cells ) miss checkpoints in the cell cycle ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | this regulation makes sure that cells do n't divide under unfavorable conditions ( for instance , when their dna is damaged , or when there is n't room for more cells in a tissue or organ ) . cell cycle checkpoints a checkpoint is a stage in the eukaryotic cell cycle at which at which the cell examines internal and ext... | what happens when a cell ignores the checkpoints ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | they use information about their own internal state and cues from the environment around them to decide whether to proceed with cell division . this regulation makes sure that cells do n't divide under unfavorable conditions ( for instance , when their dna is damaged , or when there is n't room for more cells in a tiss... | what happens to the polar bodies that do n't become gametes ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | dna replication . was the dna completely copied during s phase ? if errors or damage are detected , the cell will pause at the g $ _2 $ checkpoint to allow for repairs . | what are the number of chromosomes in g1 phase ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | this regulation makes sure that cells do n't divide under unfavorable conditions ( for instance , when their dna is damaged , or when there is n't room for more cells in a tissue or organ ) . cell cycle checkpoints a checkpoint is a stage in the eukaryotic cell cycle at which at which the cell examines internal and ext... | whether cell is in diploid condition or haploid ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | this regulation makes sure that cells do n't divide under unfavorable conditions ( for instance , when their dna is damaged , or when there is n't room for more cells in a tissue or organ ) . cell cycle checkpoints a checkpoint is a stage in the eukaryotic cell cycle at which at which the cell examines internal and ext... | what would be the evolutionary advantages of cell checkpoints ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | if the checkpoint mechanisms detect problems with the dna , the cell cycle is halted , and the cell attempts to either complete dna replication or repair the damaged dna . if the damage is irreparable , the cell may undergo apoptosis , or programmed cell death $ ^2 $ . this self-destruction mechanism ensures that damag... | would a cell undergo apoptosis if it was a single celled organism ? |
introduction as cells move through the cell cycle , do they breeze through from one phase to the next ? if they 're cancer cells , the answer might be yes . normal cells , however , move through the cell cycle in a regulated way . they use information about their own internal state and cues from the environment around ... | if the checkpoint mechanisms detect problems with the dna , the cell cycle is halted , and the cell attempts to either complete dna replication or repair the damaged dna . if the damage is irreparable , the cell may undergo apoptosis , or programmed cell death $ ^2 $ . this self-destruction mechanism ensures that damag... | because the only reason i see for a cell to `` kill itself '' is if it was for the greater good for the organism , but how would that be good if itself was the organism ? |
key points : a multicellular organism develops from a single cell ( the zygote ) into a collection of many different cell types , organized into tissues and organs . development involves cell division , body axis formation , tissue and organ development , and cell differentiation ( gaining a final cell type identity ) ... | key points : a multicellular organism develops from a single cell ( the zygote ) into a collection of many different cell types , organized into tissues and organs . development involves cell division , body axis formation , tissue and organ development , and cell differentiation ( gaining a final cell type identity ) ... | how a does cell know what function to perform ? |
key points unexpected inflation tends to hurt those whose money received—in terms of wages and interest payments—does not rise with inflation . inflation can help those who owe money that can be paid back in less valuable , inflated dollars . low rates of inflation have relatively little economic impact over the short ... | high rates of inflation can muddle price signals in the short term and prevent market forces from operating efficiently . self-check question if inflation rises unexpectedly by 5 % , would a state government that had recently borrowed money to pay for a new highway benefit or lose ? review question identify several par... | does the government really benefit from increased tax returns , because would n't those returns be worth less ? |
key points unexpected inflation tends to hurt those whose money received—in terms of wages and interest payments—does not rise with inflation . inflation can help those who owe money that can be paid back in less valuable , inflated dollars . low rates of inflation have relatively little economic impact over the short ... | critical-thinking questions if , over time , wages and salaries on average rise at least as fast as inflation , why do people worry about how inflation affects incomes ? who in an economy is the big winner from inflation ? | who in an economy is the big winner from inflation really ? |
key points unexpected inflation tends to hurt those whose money received—in terms of wages and interest payments—does not rise with inflation . inflation can help those who owe money that can be paid back in less valuable , inflated dollars . low rates of inflation have relatively little economic impact over the short ... | an annual inflation rate of 2 % , 3 % , or 4 % , however , is a long way from a national crisis . low inflation is also better than deflation which occurs with severe recessions . second , an argument is sometimes made that moderate inflation may help the economy by making wages in labor markets more flexible . | theoretically would n't deflation potentially be better if it was accompanied by higher efficiency and production and allowed companies to produce more and lower costs , thus allowing them to lower prices and be more competitive in the open market ? |
key points : bacterial genes are often found in operons . genes in an operon are transcribed as a group and have a single promoter . each operon contains regulatory dna sequences , which act as binding sites for regulatory proteins that promote or inhibit transcription . regulatory proteins often bind to small molecule... | for instance , an activator may only become active ( able to bind dna ) when it 's attached to a certain small molecule . operons may be inducible or repressible some operons are usually `` off , '' but can be turned `` on '' by a small molecule . the molecule is called an inducer , and the operon is said to be inducib... | how would the lac and trp operons be affected by a mistake in the system ? |
key points : bacterial genes are often found in operons . genes in an operon are transcribed as a group and have a single promoter . each operon contains regulatory dna sequences , which act as binding sites for regulatory proteins that promote or inhibit transcription . regulatory proteins often bind to small molecule... | the molecule is called an inducer , and the operon is said to be inducible . for example , the lac operon is an inducible operon that encodes enzymes for metabolism of the sugar lactose . it turns on only when the sugar lactose is present ( and other , preferred sugars are absent ) . | more specifically , what would happen to the organism if the operon systems did not run properly due to mutation or other sources of error ? |
key points : bacterial genes are often found in operons . genes in an operon are transcribed as a group and have a single promoter . each operon contains regulatory dna sequences , which act as binding sites for regulatory proteins that promote or inhibit transcription . regulatory proteins often bind to small molecule... | the cell will only use the recipes ( express the genes ) that fit its current needs . how is gene expression regulated ? there are various forms of gene regulation , that is , mechanisms for controlling which genes get expressed and at what levels . | what is the evolutionary advantage of regulation of prokaryotic gene expression ? |
key points : bacterial genes are often found in operons . genes in an operon are transcribed as a group and have a single promoter . each operon contains regulatory dna sequences , which act as binding sites for regulatory proteins that promote or inhibit transcription . regulatory proteins often bind to small molecule... | key points : bacterial genes are often found in operons . genes in an operon are transcribed as a group and have a single promoter . | which of the following discoveries is most crucial to explaining why all organisms share the same genetic code ? |
key points : bacterial genes are often found in operons . genes in an operon are transcribed as a group and have a single promoter . each operon contains regulatory dna sequences , which act as binding sites for regulatory proteins that promote or inhibit transcription . regulatory proteins often bind to small molecule... | operons are common in bacteria , but they are rare in eukaryotes such as humans . in general , an operon will contain genes that function in the same process . for instance , a well-studied operon called the lac operon contains genes that encode proteins involved in uptake and metabolism of a particular sugar , lactose... | is it possible that genes of the same operon up- and down-regulates at the same time ? |
while there is no one text or creed that forms the basis of all hindu beliefs , several texts are considered fundamental to all branches of hinduism . these texts are generally divided into two main groups : eternal , revealed texts , and those based upon what humanity has learned and written down . the vedas are an ex... | they are collectively known as tantras or agamas , and refer to religious observances , yoga , behavior , and the proper selection and design of temple sites . some aspects of the tantras concern the harnessing of physical energies as a means to achieve spiritual breakthrough . tantric practices cross religious boundar... | what energies are considered possible to harness in the tantras ? |
while there is no one text or creed that forms the basis of all hindu beliefs , several texts are considered fundamental to all branches of hinduism . these texts are generally divided into two main groups : eternal , revealed texts , and those based upon what humanity has learned and written down . the vedas are an ex... | the couple returns to ayodhya and are crowned , and from that point the story has evolved to acquire different endings . episodes of the ramayana are frequently illustrated in hindu art . the puranas the puranas are the primary source of stories about the hindu deities . | why ca n't there be any pages on the history of the tantras and tantric art in india and tibet ? |
overview virginian and revolutionary war general george washington became the united states 's first president in 1789 . his actions in office set a precedent for a strong executive branch and a strong central government . the major political questions and conflicts during the 1790s concerned foreign policy , economic ... | newly-minted treasury secretary alexander hamilton proposed a two-part solution : the federal government would assume the states ’ debt and create a national bank . hamilton believed a national bank would help to promote business by printing federally-backed money . there was just one problem : the constitution said no... | was this statement adjusted for inflation or was it this amount of money back in 1789 ? |
what is celiac disease ? wheat has been a basic staple of the human diet for around 10,000 years . its success as a food source is largely due to its adaptability to growing conditions in temperate countries , its high yield and nutritional value , and because of gluten , a mixture of proteins contained within the whea... | what is celiac disease ? wheat has been a basic staple of the human diet for around 10,000 years . | what happened if you keep eating wheat after you been diagnosed with celiac disease ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : just as you can put tinkertoy® wheels together in different ways using different stick connectors , you can also put atoms together in a different ways by forming different sets of chemical bo... | so a chemical reaction changes wood into fire ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | the process of reorganizing atoms by breaking one set of chemical bonds and forming a new set is known as a chemical reaction . chemical reactions chemical reactions occur when chemical bonds between atoms are formed or broken . the substances that go into a chemical reaction are called the reactants , and the substanc... | questions : 1 ) why do you always need two sets of reactants to form chemical reactions ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | an arrow is drawn between the reactants and products to indicate the direction of the chemical reaction , though a chemical reaction is not always a `` one-way street , '' as we 'll explore further in the next section . for example , the reaction for breakdown of hydrogen peroxide ( $ \text { h } { 2 } $ $ \text { o } ... | when forming a bond with oxygen come about ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | when a reaction is classified as reversible , it is usually written with paired forward and backward arrows to show it can go both ways . for example , in human blood , excess hydrogen ions ( $ \text h^+ $ ) bind to bicarbonate ions ( $ \text { hco } { 3 } $ $ ^ { - } $ ) , forming carbonic acid ( $ \text { h } { 2 } $... | would n't making the solute smaller decrease the surface area ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . | are all hidrogen atoms equal to each other ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | reversibility and equilibrium some chemical reactions simply run in one direction until the reactants are used up . these reactions are said to be irreversible . other reactions , however , are classified as reversible . | so , there are revirsible and irreversible ions and atoms ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | reversible reactions can go in both the forward and backward directions . in a reversible reaction , reactants turn into products , but products also turn back into reactants . in fact , both the forward reaction and its opposite will take place at the same time . | how much energy would be required to make an irreversible reaction go the other way , such as to turn water back into its reactants ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : just as you can put tinkertoy® wheels together in different ways using different stick connectors , you can also put atoms together in a different ways by forming different sets of chemical bo... | when we make chemical reaction , is the energy produce will only be in the form of heat or is there any kind of energy that it produce during the chemical reaction takes place ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | the process of reorganizing atoms by breaking one set of chemical bonds and forming a new set is known as a chemical reaction . chemical reactions chemical reactions occur when chemical bonds between atoms are formed or broken . the substances that go into a chemical reaction are called the reactants , and the substanc... | how many combinations of chemical reactions are there ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : just as you can put tinkertoy® wheels together in different ways using different stick connectors , you can also put atoms together in a different ways by forming different sets of chemical bo... | can radioactive elements set on fire ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | the substances that go into a chemical reaction are called the reactants , and the substances produced at the end of the reaction are known as the products . an arrow is drawn between the reactants and products to indicate the direction of the chemical reaction , though a chemical reaction is not always a `` one-way st... | why does there always have to be two sets of reactments to form a proper chemical reaction ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | reversibility and equilibrium some chemical reactions simply run in one direction until the reactants are used up . these reactions are said to be irreversible . other reactions , however , are classified as reversible . reversible reactions can go in both the forward and backward directions . in a reversible reaction ... | how can we tell which reactions are reversible or irreversible ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : just as you can put tinkertoy® wheels together in different ways using different stick connectors , you can also put atoms together in a different ways by forming different sets of chemical bo... | what 's the difference between a chemical bond and a chemical reaction ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | for example , the reaction for breakdown of hydrogen peroxide ( $ \text { h } { 2 } $ $ \text { o } { 2 } $ ) into water and oxygen can be written as : $ 2 \text { h } { 2 } $ $ \text { o } { 2 } \text { ( hydrogen peroxide ) } $ $ \rightarrow $ $ 2\text { h } { 2 } \text o \text { ( water ) } $ + $ \text { o } { 2 } \... | where are hydrogen and oxygen atoms found as single atoms ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . | where do atoms get their energy from ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | the process of reorganizing atoms by breaking one set of chemical bonds and forming a new set is known as a chemical reaction . chemical reactions chemical reactions occur when chemical bonds between atoms are formed or broken . the substances that go into a chemical reaction are called the reactants , and the substanc... | how do multiple chemical reactions occur simultaneously ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : just as you can put tinkertoy® wheels together in different ways using different stick connectors , you can also put atoms together in a different ways by forming different sets of chemical bo... | when water gets boiled by fire that is an example of a chemical reaction ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | the process of reorganizing atoms by breaking one set of chemical bonds and forming a new set is known as a chemical reaction . chemical reactions chemical reactions occur when chemical bonds between atoms are formed or broken . the substances that go into a chemical reaction are called the reactants , and the substanc... | how can i calculate the entropy just by looking at the chemical equations ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | when a reaction is classified as reversible , it is usually written with paired forward and backward arrows to show it can go both ways . for example , in human blood , excess hydrogen ions ( $ \text h^+ $ ) bind to bicarbonate ions ( $ \text { hco } { 3 } $ $ ^ { - } $ ) , forming carbonic acid ( $ \text { h } { 2 } $... | what is hco3 , h+ and h2co3 ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . | what is the difference between h2o and o2 ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | reversible reactions can go in both the forward and backward directions . in a reversible reaction , reactants turn into products , but products also turn back into reactants . in fact , both the forward reaction and its opposite will take place at the same time . | i get that the products can be turned into reactants and that after the reactants can be turned into products , but is the reaction that fast that to us it looks like the molecules are being converted one into another at the same time ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . | why and how does carbon- 12 become carbom-14 which is radioactive ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | reversible reactions can go in both the forward and backward directions . in a reversible reaction , reactants turn into products , but products also turn back into reactants . in fact , both the forward reaction and its opposite will take place at the same time . | what would be the singular form of reactants , reactor or reactant ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | you can learn more about balancing reactions in the balancing chemical equations tutorial . reversibility and equilibrium some chemical reactions simply run in one direction until the reactants are used up . these reactions are said to be irreversible . | concerning the reversibility and equilibrium paragraph : if i were to introduce salt water to , to a glass of water , would the reactions that occur ( establishing equilibrium ) be in line with the concept of this paragraph ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | the process of reorganizing atoms by breaking one set of chemical bonds and forming a new set is known as a chemical reaction . chemical reactions chemical reactions occur when chemical bonds between atoms are formed or broken . the substances that go into a chemical reaction are called the reactants , and the substanc... | so what is the difference between chemical reactions and non-chemical reactions ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | an arrow is drawn between the reactants and products to indicate the direction of the chemical reaction , though a chemical reaction is not always a `` one-way street , '' as we 'll explore further in the next section . for example , the reaction for breakdown of hydrogen peroxide ( $ \text { h } { 2 } $ $ \text { o } ... | can this energy be used to break water molecule into hydrogen and oxygen and the hydrogen be used as fuel for cars ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | these numbers are called coefficients , and they tell us how many of each molecule participate in the reaction . they must be included in order to make our equation balanced , meaning that the number of atoms of each element is the same on the two sides of the equation . equations must be balanced to reflect the law of... | why is the equation written 2h2 + o2 ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | the process of reorganizing atoms by breaking one set of chemical bonds and forming a new set is known as a chemical reaction . chemical reactions chemical reactions occur when chemical bonds between atoms are formed or broken . the substances that go into a chemical reaction are called the reactants , and the substanc... | if most reactions are actually reversable , how would you reverse co2 ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . | how are the charges of radicals determined ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | when a reaction is classified as reversible , it is usually written with paired forward and backward arrows to show it can go both ways . for example , in human blood , excess hydrogen ions ( $ \text h^+ $ ) bind to bicarbonate ions ( $ \text { hco } { 3 } $ $ ^ { - } $ ) , forming carbonic acid ( $ \text { h } { 2 } $... | can somebody tell me what the equation for ( hco3- +3+ < > h2co3 ) would be if carbonic acid would be ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . | how do biological chemicals react to acids ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | these reactions are said to be irreversible . other reactions , however , are classified as reversible . reversible reactions can go in both the forward and backward directions . in a reversible reaction , reactants turn into products , but products also turn back into reactants . in fact , both the forward reaction an... | if reversible reactions reach equilibrium , does that mean that the concentration of reactants in the system is equal to the concentration of the products ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | for example , the reaction for breakdown of hydrogen peroxide ( $ \text { h } { 2 } $ $ \text { o } { 2 } $ ) into water and oxygen can be written as : $ 2 \text { h } { 2 } $ $ \text { o } { 2 } \text { ( hydrogen peroxide ) } $ $ \rightarrow $ $ 2\text { h } { 2 } \text o \text { ( water ) } $ + $ \text { o } { 2 } \... | how does water factor into dehydration synthesis during weight lifting ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | the process of reorganizing atoms by breaking one set of chemical bonds and forming a new set is known as a chemical reaction . chemical reactions chemical reactions occur when chemical bonds between atoms are formed or broken . the substances that go into a chemical reaction are called the reactants , and the substanc... | can chemical reactions changes everything ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | an arrow is drawn between the reactants and products to indicate the direction of the chemical reaction , though a chemical reaction is not always a `` one-way street , '' as we 'll explore further in the next section . for example , the reaction for breakdown of hydrogen peroxide ( $ \text { h } { 2 } $ $ \text { o } ... | will the collision of an electron and proton produce a lot of energy because of opposite charges annihilating each other and because of the equation'e=mc^2 ' ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : just as you can put tinkertoy® wheels together in different ways using different stick connectors , you can also put atoms together in a different ways by forming different sets of chemical bo... | how do you know when a chemical reaction has occurred ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | the process of reorganizing atoms by breaking one set of chemical bonds and forming a new set is known as a chemical reaction . chemical reactions chemical reactions occur when chemical bonds between atoms are formed or broken . the substances that go into a chemical reaction are called the reactants , and the substanc... | the third paragraph says that a chemical reaction has occured when `` chemical bonds between atoms are formed or broken '' , but are there signs that a chemical reaction happened ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : just as you can put tinkertoy® wheels together in different ways using different stick connectors , you can also put atoms together in a different ways by forming different sets of chemical bo... | would an explosion be considered a chemical reaction ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | for example , the reaction for breakdown of hydrogen peroxide ( $ \text { h } { 2 } $ $ \text { o } { 2 } $ ) into water and oxygen can be written as : $ 2 \text { h } { 2 } $ $ \text { o } { 2 } \text { ( hydrogen peroxide ) } $ $ \rightarrow $ $ 2\text { h } { 2 } \text o \text { ( water ) } $ + $ \text { o } { 2 } \... | what happen when a non metal react with water ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . | how do you know that h2o2 gives h2o and o2 ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | in a reversible reaction , reactants turn into products , but products also turn back into reactants . in fact , both the forward reaction and its opposite will take place at the same time . this back and forth continues until a certain relative balance between reactants and products is reached—a state called equilibri... | how do the reactions take place ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | the process of reorganizing atoms by breaking one set of chemical bonds and forming a new set is known as a chemical reaction . chemical reactions chemical reactions occur when chemical bonds between atoms are formed or broken . the substances that go into a chemical reaction are called the reactants , and the substanc... | what properties of a chemical equation make it reversible and what properties of a chemical equation make it irreversible ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : just as you can put tinkertoy® wheels together in different ways using different stick connectors , you can also put atoms together in a different ways by forming different sets of chemical bo... | is mass conserved in a chemical reaction ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . | if the atoms are n't gained ou losed , from where comes the energy released ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : just as you can put tinkertoy® wheels together in different ways using different stick connectors , you can also put atoms tog... | can an atom be seen using a special kind of microscope ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : just as you can put tinkertoy® wheels together in different ways using different stick connectors , you can also put atoms together in a different ways by forming different sets of chemical bo... | what happens to the atom in a chemical reaction ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : just as you can put tinkertoy® wheels together in different ways using different stick connectors , you can also put atoms together in a different ways by forming different sets of chemical bo... | is a new one created or is it destroyed ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | these numbers are called coefficients , and they tell us how many of each molecule participate in the reaction . they must be included in order to make our equation balanced , meaning that the number of atoms of each element is the same on the two sides of the equation . equations must be balanced to reflect the law of... | what is the incomplete combustion word equation and balanced equation of acetylene in oxygen ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | the process of reorganizing atoms by breaking one set of chemical bonds and forming a new set is known as a chemical reaction . chemical reactions chemical reactions occur when chemical bonds between atoms are formed or broken . the substances that go into a chemical reaction are called the reactants , and the substanc... | how are chemical bonds useful in our daily life ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | the process of reorganizing atoms by breaking one set of chemical bonds and forming a new set is known as a chemical reaction . chemical reactions chemical reactions occur when chemical bonds between atoms are formed or broken . the substances that go into a chemical reaction are called the reactants , and the substanc... | in the paragraph chemical reactions , how powerful or strong can a reaction get ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | chemical reactions chemical reactions occur when chemical bonds between atoms are formed or broken . the substances that go into a chemical reaction are called the reactants , and the substances produced at the end of the reaction are known as the products . an arrow is drawn between the reactants and products to indic... | how long can a reaction last ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | they must be included in order to make our equation balanced , meaning that the number of atoms of each element is the same on the two sides of the equation . equations must be balanced to reflect the law of conservation of matter , which states that no atoms are created or destroyed over the course of a normal chemica... | can atoms be destroyed or created ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . | does an atom have a life span ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : just as you can put tinkertoy® wheels together in different ways using different stick connectors , you can also put atoms together in a different ways by forming different sets of chemical bo... | if you had some kind of radioactive explosion or leak , where nulear or atomic waste leak onto the earth or into the air , would the slow decaying of the waste 's radioactivity be a chemical reaction , and would the effects that radioactive waste gives off be chemical ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . | what does the formulas mean ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | the process of reorganizing atoms by breaking one set of chemical bonds and forming a new set is known as a chemical reaction . chemical reactions chemical reactions occur when chemical bonds between atoms are formed or broken . the substances that go into a chemical reaction are called the reactants , and the substanc... | does the mass of a chemical change when heated ? |
introduction molecules—like the ones that make up your body—are just collections of atoms held together by chemical bonds . in many ways , they 're a lot like tinkertoy® building projects . in fact , if you take organic chemistry , you ’ ll most likely buy a model set that looks suspiciously similar to tinkertoys® : ju... | this back and forth continues until a certain relative balance between reactants and products is reached—a state called equilibrium . at equilibrium , the forward and backward reactions are still happening , but the relative concentrations of products and reactants no longer change . each reaction has its own character... | why is fire hot and why does it change collar ? |
before we get into the discussion of cyclic hemiacetals and hemiacetals , let ’ s just quickly recollect how they are formed . they are formed when an alcohol oxygen atom adds to the carbonyl carbon of an aldehyde or a ketone . this happens through the nucleophilic attack of the hydroxyl group at the electrophilic carb... | let ’ s now show the formation of hemiacetal of glucose starting from its open structure ( fischer projection ) . so why doesn ’ t the hydroxyl attached to c-4 react with the carbonyl group ? why does the carbonyl group react with the hydroxyl attached to c-5 ? c-4 hydroxyl attacking the carbonyl group will lead to the... | the article explains the preference of c5 over c4 , but why does n't c6 's hydroxyl group react with the carbonyll ? |
before we get into the discussion of cyclic hemiacetals and hemiacetals , let ’ s just quickly recollect how they are formed . they are formed when an alcohol oxygen atom adds to the carbonyl carbon of an aldehyde or a ketone . this happens through the nucleophilic attack of the hydroxyl group at the electrophilic carb... | this may not be the case with all the monosaccharides . cyclization of fructose to its hemiketal form now let ’ s change gears and apply the same principles ( as applied to glucose ) to a molecule of fructose . fructose has a ketone group and five hydroxyl groups . so , fructose should also be able to cyclize to form a... | does somebody knows if both structures ( alpha and beta fructose ) are present in the nature ? |
how were firearms introduced to japan ? guns were introduced to japan by portuguese adventurers who were shipwrecked near the shore of tanegashima , a small island south of kyushu , in 1543 . matchlock pistols and guns modeled on the imported weapons began to be made in japan and were an important feature of battles du... | how were firearms introduced to japan ? guns were introduced to japan by portuguese adventurers who were shipwrecked near the shore of tanegashima , a small island south of kyushu , in 1543 . | was there any difference in status between a bow and a firearm ? |
the end of the world y2k . the rapture . 2012 . for over a decade , speculation about the end of the world has run rampant—all in conjunction with the arrival of the new millennium . the same was true for our religious european counterparts who , prior to the year 1000 , believed the second coming of christ was imminen... | the end of the world y2k . the rapture . | why do we have these `` end of the world '' stories ? |
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