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Calculate the empirical formula of naproxen (aleve), an over-the-counter pain reliever that has 73.03% c by mass, 6.13% h by mass, and 20.84% o by mass.
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Calculate the empirical formula of naproxen (aleve), an over-the-counter pain reliever that has 73.03% c by mass, 6.13% h by mass, and 20.84% o by mass.

User Ross Coundon
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If the molecular weight is 230.26 g/mol carbon = 73.03% = 230.26*73.03/100 = 168.15/12 = 14 Carbons Hydrogen = 6.13% = 230.26*6.13/100 = 14/1 = 14 Hydrogens Oxigen = 20.84% = 230.26*20.84/100 = 47.98/16 = 3 Oxygens Hence the empirical formula is C14H14O3
User David Godwin
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