28 gms of N2 and 6 gms of H2 were heated in a closed 1litre vessel. At equilibrium, 25.5 gms of NH3 is present. The approximate value of KC is

Vvessel = 1 lit1 mole of N2 gives 2 moles of NH3'X1' mole of N2 gives 1.5 moles of NH3Number of moles of N2 reacted = 0.753 moles of H2 gives 2 moles of NH3'X2' moles of H2 gives 1.5 moles of NH3Number of moles of H2 reacted = 2.25