Chemistry

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

More Questions from Chemistry
Acetylsalicylic acid is the chemical name for which?
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What symbol appears on the periodic table for the element with the atomic number 70?
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What is the second most common metal on Earth, and the most widely-used metal?
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What halogen is the most reactive and combines with most elements from around the periodic table?
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What does the gall bladder secrete?
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What is the molecular geometry of the molecule sulfur hexafluoride?
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Which of the following activities is an example of changing a physical property?
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What is the second-most abundant element in the universe, though it is much less common on Earth?
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