If 3.79x1024 formula units (molecules) of hematite react with excess carbon, what mass of iron will be produced?
F2O3 ???
2Fe2O3 + 3C --> 4Fe + 3CO2 ??? maybe
mols of Fe2O3 = 3.79*10*24 /6.02*10^23
= 6.30 mols Fe2O3
or
12.6 mols Fe
Fe is 56 g/mol
so
12.6 * 56 = 706 grams Fe `