Please show step by step with answer
The equilibrium constant, Kc, for the equilibrium N2O4 (g) <---> 2NO2(g) is 4.6 x 10^-3
If the equilibrium mixture contains 4.0×10^-2 M NO2, what is the concentration of N2O4?
4.6*10^-3 = [NO2]^2/[N2O4]
=> [NO2] =3.48*10^-1