When 0.40 mol Al is mixed with 0.40 mol Br2, the following reaction occurs: 2Al(s) + 3Br2(l) → 2AlBr3(s) Identify the limiting reactant and the moles of leftover reactant, assuming the reaction goes to completion.

a. The limiting reactant is Br2, and 0.20 mol Al should remain unreacted.
b. The limiting reactant is Al, and 0.13 mol Br2 should remain unreacted.
c. The limiting reactant is Al, and 0.20 mol Br2 should remain unreacted.
d. The limiting reactant is Br2, and 0.13 mol Al should remain unreacted.