Thermite is a mixture of iron(III) oxide and aluminum powders that is used in some countries to weld railroad tracks. It is a spectacular reaction to yield solid aluminum oxide that floats on the molten iron. When cooled, the iron is ground smooth and even with the rest of the rail.
Fe2O3 + 2 Al 2 Fe + Al2O3
(a) How many grams of iron form when 114 g of aluminum reacts?
(b) How many atoms of aluminum react for every 2.20 g of aluminum oxide formed?