Iron pyrite, commonly known as “fool’s gold,” is 46.5% Fe and 53.5% S.a. If a crystal of i...

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?

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b. If the empirical formula and the molecular formula are the same, what is the formula of the compound?

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c. How many moles of iron are in the crystal?