Homework Help: Chemistry Help!

Posted by Alisha on Thursday, October 4, 2012 at 9:54pm.

Anthracene which contains only Carbon and hydrogen, is an important source of dyes. When 250 mg of anthracene is burned in pure oxygen, 8.64 mg of CO2 and 1.26 mg of H2O are formed. What is the empirical formula of anthracene?

Chemistry Help! - DrBob222, Thursday, October 4, 2012 at 11:03pm
The easist, I think, but a little longer is to convert to percent.
%C = 8.64 x (12/44)/250 = %C
12 is atomic mass C. 44 is molar mass CO2.

%H = 1.26 x (2*1/18)/250 = %H.
Then take a 100 g sample, convert to mols C and mols H and find the ratio. Post your work if you get stuck and I can help you throgh.
Chemistry Help! - Abdul Khabar hassan, Sunday, October 7, 2012 at 11:48pm
Hi

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