A 1.000 g sample of an aluminum is dissolved and the sulfate precipitated as BaSO4. The precipitate weighed
0.3486 g after it was washed and ignited. Assuming all the sulfate and aluminum in the sample were in the form
of K2Al2(SO4)3 • 24 H2O, calculate the percentage of Al2O3 in the sample.
Moles of aluminiun