A compound containing only hydrogen and oxygen is 5.9% hydrogen by mass. molar mass of the compound is 34 g/mole, What is the molecular formula of the compound?
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5.88 g H x (1 mol H/1.01 g H) = 5.82 mol H
94.12 g O x (1 mol O/16.00 g) = 5.88 mol O
The empirical formula, HO, has a formula mass of 17 g/mol.
The molecular formula is H2O2 (hydrogen peroxide) with a molar mass of 34.
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