Answer: 4 Al + 3 O2 --> 2 Al2O3 - Limiting Reactant: O2
Explanation:
Balanced equation:
For every 1 mol of Al2O3 there has to be 2 mol of Al.
For every 1 mol of Al2O3 there has to be 3 mol of O2.
2 Al2O3 = 4 Al + 3O2
If there is 4 mol of O2 and Al only 1 mol of Al2O3 could be made because after 1 mol of Al2O3 is made there is only 1 mol of O2 but there is 2 mol of Al. There is enough Al for a second mol of Al2O3 but there is not enough O2, making O2 the limiting reactant.
