Chemistry
Which scientist was the first to discover that for DNA, "A=T and C=G"?
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Gold, silver, lead, and copper exhibit the properties of which of the following crystal systems?
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Which of these is a heavy gas used in specialized electric lamps?
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The study of the effects of light on chemical reactions is known as what?
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In a triple bond, how many each pi and sigma bonds are there?
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The spontaneity of a reaction is determined by which of these?
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What is the most common chemical element found in the Earth's atmosphere?
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