For the reaction 2 NO2(g) = 2 NO(g) + O2(g) Kp = 1.11 x 10-5 at 200 °C. A 2.50 L vessel at 200 °C is filled with NO2(g) at an initial pressure of 2.75 atm and allowed to come to equilibrium. What will be the pressure (in atm) of NO(g) at equilibrium?

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