The equilibrium constant (Kc) for the reaction  N2g+O2g⇌ 2NOg at temperature T is 4 × 10-4. The value of Kc, for the reaction, NOg⇌ 2NOg at temperature T is 4 × 10-4. The value of Kc,for the reaction, NOg⇌ 1/2N2g+1/2O2g at the same temperature is