Homework Help: Chemistry

Posted by Eileen on Friday, April 16, 2010 at 3:39pm.

Oxygen gas reacts with powdered aluminum according to the following reaction:
4Al(s)+3 O2(g) --> 2 Al2O3 (s)
How many liters of O2 gas, measured at 789 mm Hg and 35 C, are required to completely react with 2.2 mol of Al?

Chemistry - Damon, Friday, April 16, 2010 at 3:56pm
for every 4 mols of Al you need 3 mols of O2
so
mols O2 = (3/4)mols Al = .75 *2.2 = 1.65 mols

Now do P V = n R T with n = 1.65 mol

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