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Convert into mole 20g of calcium atom

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Answer:

How many moles of calcium atoms does it CONTAIN? The answer is one half of a mole, because 1 mole is equal to 6.02 x 1023, so a half of a mole WOULD be equal to 3.01 x 1023 atoms. Okay, so if it contains 0.5 moles of calcium atoms, how MUCH MASS would that have? The answer is about 20 grams.

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