CH-934
The mole
Chemistry · Secondary 3 · Hard · The mole
10.0 g of an impure sample of calcium carbonate reacts completely with excess hydrochloric acid to produce 2.20 g of carbon dioxide. (Molar mass of CO = 44 g mol) What is the percentage purity of calcium carbonate in the sample?
- 22%
- 44%
- 50%
- 78%
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