Considering the given equation Fe2O3(s) + 3 CO(g) → 3 CO2(g) + 2 Fe(s) now determine how much Fe (iron) is produced when 352 grams Fe2O3 reacts with excess carbon monoxide ? Given that Iron(III) oxide or ferric oxide (molar mass = 159.7 g/mol) reacts with Carbon monoxide (molar mass = 28.0 g/mol).