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August 21, 2014

Homework Help: Chemistry

Posted by Anonymous on Thursday, April 15, 2010 at 1:07pm.

Maleic acid is an organic compound composed of 41.39% C, 3.47% H, and the rest oxygen. If 0.271 mol of maleic acid has a mass of 31.4 g, what are the empirical and molecular formulas of maleic acid?
My work:
C: 41.39 g x (1 mol/12.01 g) = 3.44629 = 1
H: 3.47 g x (1 mol/1.008 g) = 3.44246 = 1
O: 55.14 x (1 mol/16 g) = 3. 44625 = 1

For empirical I need to divide the smallest mol so they would all equal to 1
Emp formula : COH? CHO?

For the Molecular formula I know I’m supposed to divide the molar mass by the empirical formula’s mass. I need help finding the molar mass. Or is it just 31.4 g?

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