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Chemistry

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A compound has a molar mass of 456.18g/mol and consists pf 3.0g of Fe and 4.81g of S. Calculate both empirical and molecular formulas.

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Answer:

If we divide the known molar mass (283.88 g/mol) by this formula mass (141.94 g/mol) we get 2. Thus the true formula of the compound is twice the empirical formula: (P2O5)2 or P4O10.

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