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Chemistry
What is a vital constituent of plant and animal life, and is the key component of hemoglobin?
Chemistry
What is a vital constituent of plant and animal life, and is the key component of hemoglobin?
Iron
Zinc
Manganese
Calcium
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What is the stinky gas associated with swamps and anaerobic decomposition?
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Who is generally credited with discovering the electron?
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What is the chemical symbol for Helium?
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What are substances that control the rates of chemical reactions?
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What element gets its name from the Greek word "kryptos" meaning "the hidden one"?
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Which of the following structures best characterizes glass?
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Which of the following is a compound?
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Which of the following is produced in alkaline scrubbing and called wet slurry?
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