contestada

Consider the following two reactions :

NO (g)+ 1/2 O₂ (g) <=> NO₂ (g); K₁ =4x10⁻³
2NO₂ (g) <=> 2NO (g) + O₂ (g); K₂ =?

If K₁ and K₂ are equilibrium constants, what will be the value of K₂?