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Balancing and stoichiometry questions

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1. For the equation, Al + O^2 Al^2O^3 answer the following questions:

a. Balance the above equation.
b. If 10.0 g of Al are used, how many g of oxygen are needed and how many g of product are produced?
?c. If you had 20 moles of Al, how many moles of oxygen would be needed and how many moles of product would be produced?
d. Based on the information in b., if you isolated 5.0 g of Al^2O^3, calculate the % yield.

Please see the corresponding attachement for the properly formatted equations. If you could respond in a word document, that would be great.

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