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for thr reation: 2AlCl3 + 3H2SO4= Al2(SO4)3 + 6 HCl
How many grams of H2SO4 are needed to produce 27.0 grams of Al2(SO4)3

Lillian--Here is an example stoichiometry problem I've posted. It will do about 99% of all of the simple stoichiometry problems you may have; just follow the steps.
http://www.jiskha.com/science/chemistry/stoichiometry.html

IS THE ANSWER 57.14G OF H2SO4

I don't think so. If you will post your work someone will look for the error.

23.21G

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