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Stoichiometry of reactions

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When a mole of C7H16 is combusted, it reacts with 11 moles of O2. How many moles of CO2 product are obtained? How many moles of H2O product are obtained?

Also, I have another question:
The production of aluminum metal from its ore is by the reaction:
2Al2O3 + 3C --> 4Al + 3CO2
How many grams of Al result when 775 grams of Al2O3 react?

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Solution Summary

The solution shows, step by step, how to balance a chemical reaction and how to use the reaction coefficients to obtain the final mass of a substance.