According to Le Chatelier's principle, if a system at equilibrium is subjected to a change in concentration, pressure, or temperature, the equilibrium will shift to counteract the imposed change and restore a new equilibrium.In the case of the reaction: N2 g + 3H2 g <=> 2NH3 g 1. If we add more reactant N2 or H2 to the reaction mixture at equilibrium, the system will shift to the right to consume the added reactants and produce more NH3. This will result in an increase in the concentration of NH3 and a decrease in the concentrations of N2 and H2 until a new equilibrium is established.2. If we remove the product NH3 from the reaction mixture at equilibrium, the system will shift to the right to produce more NH3 to compensate for the loss. This will result in a decrease in the concentrations of N2 and H2 and an increase in the concentration of NH3 until a new equilibrium is established.In both cases, the equilibrium position shifts to the right, favoring the formation of the product NH3 to counteract the changes made to the reaction mixture.