At a given temperature, the equilibrium constant (Kp) for the decomposition of dinitrogen tetraoxide to nitrogen dioxide is 0.154. If 0.198 atm N2O4 is sealed in a flask, what partial pressure  (in atm) of NO2 will exist at equilibrium? (no scientific notation) N2O4(g)  ⇄ 2NO2(g)

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