Chemistry
Which element has the lightest atomic weight?
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What is the second most common metal on Earth, and the most widely-used metal?
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Dr Pepper shares what main ingredient of most antifreezes?
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What fibrous substance, used in insulation and other products, can cause cancer?
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Which of the following items is most likely to be fortified with vitamins?
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If nitrous oxide is added to an engine, what will the effect be?
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What is the stinky gas associated with swamps and anaerobic decomposition?
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What sort of change happens to a head of lettuce when you cut it in half?
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