Chemistry
Which element was the first ever artificially created?
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What is the third most abundant gas in the earth's atmosphere?
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What percentage of acetic acid is legally allowed in vinegar?
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What contain most of the calcium ion in the human body?
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What is the common element in the metal alloys bronze and brass?
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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 element is the basis for organic chemistry, as it occurs in all living organisms?
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What occurs when molecules are evenly spread out in a space?
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