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5.325 g sample of methyl benzoate, a compound used in the manufacture of perfumes is found to contain 3.758 g of carbon, 0.316 g hydrogen

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5.325 g sample of methyl benzoate, a compound used in the manufacture of perfumes is found to contain 3.758 g of carbon, 0.316 g hydrogen and 1.251 g of oxygen. What is empirical formula of compound. If mol. weight of methyl benzoate is 136.0, calculate its molecular formula. 

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Empirical formula is C4H4O

Also empirical formula weight = 4 x 12 + 4 x 1 + 16= 68 

n = mol. wt./ empirical formula wt. = 136/68 = 2

Molecular formula of methyl benzoate is (C4H4O)2 or C8H8O2 

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