Question: what is the limiting reagent in hcl + naoh?
Answer: This forces HCl to be the limiting reactant (reagent) since it only has 1.5 mol versus 3.1 mol of NaOH. Since there is a 1:1:1:1 ration of reactants and products, the final molar yield will be equal to the amount of moles of the limiting reagent, which is 1.5mol of HCl.