Write the balanced chemical equation
Convert each reactant amount to moles
Use the mole ratio from the balanced equation to calculate how much product each reactant can make
Compare the product amounts
The reactant that makes the least product is the limiting reactant
Alternatively, divide each reactant’s moles by its coefficient in the balanced equation
The smallest result is the limiting reactant
Use the limiting reactant to calculate the theoretical yield
Check the excess reactant by subtracting the amount used from the amount available