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A chemical known as pyrite is sometimes called Fool’s Gold because

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A chemical known as pyrite is sometimes called Fool’s Gold because of it’s shiny color. However, it has no gold atoms in it at all! In fact, it’s just iron and sulfur atoms at a molar ratio of 1 mole of iron to 2 moles of sulfur. So, using this to determine its chemical formula, what, then, is the %Fe (by mass) in Fool’s Gold?

A.46.55
B.53.45
C.66.67
D.33.33

 
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