Chemistry

What is a vital constituent of plant and animal life, and is the key component of hemoglobin?

More Questions from Chemistry
Which of the following is not used in a chemistry lab?
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What is the most commonly used material in the manufacturing of semiconductors?
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What number is also the same as proton number and the number of electrons of a neutral atom?
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Reacting an alkene with water produces which of the following?
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What symbol appears on the periodic table for Calcium which has the atomic number 20?
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Approximately how many toxic chemicals are released while a diesel engine idles?
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From all salt elements, which group is most soluble?
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What is the fourth most abundant element in the universe by mass?
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