For a gaseous phase reaction, 2HI⇌H2+I2 , at equilibrium 7.8 g, 203.2 g and 1638.4 g of H2 , I2 and HI respectively were found in 5 litre vessel. Calculate KC . If all the reactants and products are transferred to a 2 litre vessel, what will be the amount of reactants and products at equilibrium?