Identify the balanced chemical equation
Compare the mole ratio of reactants to the stoichiometric ratio
Write the limiting reactant as the reactant with the smallest available-to-required mole ratio
Express it as the reactant that is consumed first
Show it in formula form by labeling the limiting reactant in the reaction
Use notation such as LR or limiting reactant next to the chemical formula
Example: 2H2 + O2 → 2H2O, limiting reactant: H2
Example notation: H2 (LR) or LR = H2