1 mol of them react to three moles of H two and gas state to produce two moles of ammonia and heat an exothermic reaction. So, how will increasing reactants change our equilibrium? Well, increasing the concentration of either or both the reactants shifts equilibrium to the right. So, a right workshift in equilibrium, while increasing concentration of our products, any of the products of both the products shifts our equilibrium to the left. So, increasing this guy will shift our equilibrium to the left, producing more of our reactants. So, why is that?