Consider the reaction: 2NH3(g) = N2(g) + 3H2(g) Suppose 3 moles of pure NH3 are placed in a 1.0-liter flask and allowed to reach equilibrium.

9.Consider the reaction:2NH3(g) = N2(g) + 3H2(g)Suppose 3 moles of pure NH3 are placed in a 1.0–liter flask and allowed to reach equilibrium. If "x" represents the concentration in moles per liter of N2 present in the system once equilibrium is reached, which one of the following will represent the concentration of H2 at equilibrium in moles per liter?A) 3 - xB) 3 - (x/2)C) 3 - 2xD) 2xE) 3x