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The calcium content of calcium carbonate is expressed as a percentage. The percentage of calcium in calcium carbonate is _____.

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answer is D.

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Detailed Solution

Molecular weight of CaCO₃ = 40+12+(3×16) = 100 amu

Calcium mass in 1 mole of CaCO₃ = 40 gm

Calcium percentage = $\frac{40}{100}$ %= 40%

Hence, the percentage of calcium is 40% in calcium carbonate.

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