In the reaction below, what is the limiting reactant when 1.24 moles NH of reacts with 1.79 moles of NO?

To identify the limiting reactant, we use the coefficients of the reaction:
As you can see, we have 1.79 moles of NO, but we need 1.86 moles of NO according to the reaction. For this reason, NO is the limiting reactant since we need more than what we have.