Iron pyrite, commonly known as “fool’s gold,” is 46.5% Fe and 53.5% S.
a. If a crystal of iron pyrite contains 4.58 g of iron, what is the mass, in grams, of the crystal?
b. If the empirical formula and the molecular formula are the same, what is the formula of the compound?
c. How many moles of iron are in the crystal?
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