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How do you calculate the percentage of calcium in calcium carbonate, #CaCO_3#?

Answer 1

Henry Antrim

40.04 %

You take the atomic mass of calcium over the atomic mass of #CaCO_3# and multiply it by 100 to get the percentage.

The mass of #Ca# is 40.078 g; the mass of #C# is 12.01 g, and the mass of #3O# is 47.997 g (#"15.999 g" xx 3#).

The sum of the masses yields a mass of 100.085 g.

So, #("40.078 g")/("100.085 g") = "0.4004 or 40.04 %"#.

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Answer 2

Xavier Avery

The molar mass of calcium carbonate (CaCO3) is: Ca: 40.08 g/mol; C: 12.01 g/mol; O: 16.00 g/mol (3 atoms). Total molar mass of CaCO3 = 40.08 + 12.01 + (16.00 * 3) = 100.09 g/mol. The molar mass of calcium (Ca) is 40.08 g/mol. Using the formula, we can calculate the percentage of calcium in calcium carbonate: Percentage of calcium = (40.08 g/mol / 100.09 g/mol) * 100% ≈ 40.05% Consequently, approximately 40.05% of the mass of calcium carbonate is due to calcium.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.