How is a limiting reactant problem different from other stoichiometry problems?
A limiting reactant problem will most likely give the starting amounts of two or more reactants. The amount of products formed will be dependent on one of the reactants, but you won't be told which reactant is going to determine the amount of products formed. You will need to figure out which one limits how much product will form!
Here is a video which discusses how to determine limiting reactants.
video from: Noel Pauller