The equilibrium constant (Kp) for the reaction: N2O4 (g) ⇄ 2 NO2 (g) at 25oC is ...

The equilibrium constant (Kp) for the reaction: N2O4 (g) ⇄ 2 NO2 (g) at 25oC is 0.148. A certain mixture has a ΔG of 7.55 kJ when the pressure of N2O4 is 0.750 atm. What is the pressure of NO2 in this reaction mixture?