The rusting of iron is represented by the equation 4Fe + 3O₂ → 2Fe₂O₃. If you have a 1.67 mol sample of iron, how many moles of iron (III) oxide will remain after the iron has rusted completely?
a) 0.00 mol
b) 0.84 mol
c) 1.67 mol
d) 3.34 mol