Chemistry
Which of these is an element?
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What is a compound or mixture of chemical compounds that is used to maintain a steady pH?
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What is the primary hormone that has a role in stress adaptation?
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What isotope of carbon can be used to figure out how old some objects are or when something died?
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The Diels-Alder reaction is an example of which class of reactions?
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What is used in manufacturing matches, fertilizers and pesticides, and in vulcanization of rubber?
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Which Middle Eastern country was widely accused of using chemical weapons in 2013?
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