2Al + MnO —> Al2O3 + 3Mn

Determine the limiting reactant and mass of the remaining excess reagent of each of the given initial concentrations of reactants. Then explain further the reason a compound was considered the limiting reactants.

a.) 2 moles Al and 2 moles MnO

b.) 100g Al and 200g MnO

c.) 1.8 mol Al and 1.4 mol MnO