What is the mass of 5 moles of fe2o3?

The molar mass of Fe2O3 (Iron(III) oxide) is approximately 159.69 g/mol. So, to find the mass of 5 moles of Fe2O3, you would multiply the molar mass by 5:

159.69 g/mol * 5 mol = 798.45 grams

Therefore, the mass of 5 moles of Fe2O3 is approximately 798.45 grams.