Chemistry
What is essential for calcium absorption by the human body?
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What metal is known for the chemical compounds it forms, such as emeralds and aquamarines?
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What unit of measurement is one-thousandth of a gram?
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The dumping of most toxic chemicals into the ocean was banned by what treaty?
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What is a chemical or physical agent that tends to cause cancers?
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The Diels-Alder reaction is an example of which class of reactions?
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What would you call the treatment of disease, usually cancer, by chemical agents?
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The red color of rubies is caused mainly by the presence of what element?
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What process causes molecules to move into areas that have fewer molecules?
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