How do you calculate moles of limiting reactants?
Given the mols of each reactant, we divide it by the coefficient.
In stoichiometry, when we're given the necessary components to find the mols in each reactant, we then divide the mols by the coefficient of the reactant.
Note that the chemical equation must be balanced, and the mols can be calculated in both reactants.
If only the mols of one reactant can be calculated, then assume that as the limiting reactant.
Hope this helps :)