Recall: Mass percent is given by:
For dolomite: We're know that 7.81 g dolomite contains 1.70 g Ca. The mass percent of Ca in dolomite is:
Dolomite is a carbonate of magnesium and calcium. Analysis shows that 7.81 g of dolomite contains 1.70 g of Ca. Calculate the mass percent of Ca in dolomite. On the basis of the mass percent of Ca, and neglecting all other factors, which is the richer source of Ca, dolomite or fluorite (see Problem 2.20)?