Chemistry
What is the half-life of Rubidium-Strontium 87?
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What major chemical other than chlorine is used to purify water of microorganisms?
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What is a chemical or physical agent that tends to cause cancers?
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What is the common element in the metal alloys bronze and brass?
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What percentage of acetic acid is legally allowed in vinegar?
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What transition metal's symbol comes from the Latin word "hydrargyrum" meaning "liquid silver"?
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