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4 September, 17:02

Calculate the mass percent of calcium in calcium carbonate. Report your answer to at least 3 significant figures. Hint: This calculation is theoretical, and is independent of the data provided. Another way to phrase the question would be: What percentage of the molar mass of CaCO3 is due to the Ca?

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  1. 4 September, 18:23
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    40%

    Explanation:

    Molar mass of Ca = 40 gram/mol

    Molar mass of C = 12 gram/mol

    Mass mass of O = 16 gram/mol

    Molar mass of CaCO3 = [40 + 12 + (16 x3) ]

    = 100 gram/mol

    Mass % of Calcium = Ca / CaCO3

    = 40/100

    = 40%
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