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September 30, 2014

Homework Help: chemistry

Posted by manny on Sunday, September 16, 2007 at 8:26pm.

Can somebody point out the step i have to take to solve this problem. It would be much appreciated. Thanks a lot!!!!
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Asprin, C9H8O4, is prepared by reacting salicylic acid, C7H6O3, with acetic anhydride, C4H6O3, in the reaction:

C7H6O3 + C4H6O3 ---> C9H8O4 + C2H4O2

A student is told to prepare 45.0 g asprin. She is also told to use a 55% excess of acetic anydride and to expect to get an 85% yeild in the reaction. How many grams of each reactant should she use?

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