Calculate the mass fraction of carbon in calcium carbide CaC2.
| January 5, 2021 | education
Calcium carbide is composed of two carbon atoms and one calcium atom.
The mass fraction of carbon is equal to the ratio of the molar masses of two carbon atoms to the molar mass of calcium carbide.
Molar mass of two carbon atoms:
M C2 = 12 x 2 = 24 grams / mol;
Molar mass of calcium carbide:
M CaC2 = 40 + 12 x 2 = 64 grams / mol;
K = M C2 / M CaC2 = 24/64 = 0.375 = 37.5%;
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