Choose four ways in which the yield of ammonia in the reaction below can be improved for a given amount of H2. N2 (g) + 3H2 (g) ---- 2NH3 (g), deltaH<0 (Select all that apply.) decreasing the nitrogen or hydrogen concentration increasing the temperature increasing the total pressure on the mixture removing the gaseous  or  from the equilibrium by liquefying removing the gaseous  from the equilibrium by liquefying it decreasing the total pressure on the mixture lowering the temperature increasing the nitrogen concentration

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