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

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Answer 1 · 2016-11-06T19:56:39

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 ( $"15.999 g" xx 3$ ).

Add all the masses together to get a total mass of 100.085 g.

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

How do you calculate the percentage of calcium in calcium carbonate, CaCO_3CaCO_3?