TWO (2) moles of nitrogen gas and SIX (6) moles of hydrogen gas are mixed and react according to the following equation, N2 + 3H2 → 2NH3. The reaction mixture was allowed to reach equilibrium at 650 ºC and 2 x 107 Pa. The mixture contains 3 mol NH3.

 i. Calculate the number of moles of N2 and H2 at equilibrium. 

ii. Calculate the partial pressures of N2, H2 and NH3 at equilibrium.

 iii. Calculate Kp.