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Problem On Molecular Formula

Check us out at If carbon and hydrogen are present in a compound in a ratio of 1:2, the empirical formula for the compound is CH2. The empirical formula mass of this compound is: 12.0 + (2 x 1.0) = 14.0 g/mol If we know the molecular mass of the compound is 28.0 g/mol then we can find the molecular formula for the compound. MM = n x empirical formula mass 28.0 = n x 14.0 n = 2 So the molecular formula for the compound is 2 x empirical formula, ie, 2 x (CH2) which is C2H4
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