4. At a particular temperature, KP = 0.25 for the reaction N2O4 (g) ⇌ 2NO2 (g). a. A flask containing only N2O4 at an initial pressure of 4.5 atm is allowed to reach equilibrium. Calculate the equilibrium partial pressures of the gases. b. A flask containing only NO2 at an initial pressure of 9.0 atm is allowed to reach equilibrium. Calculate the equilibrium partial pressures of the gases. c. From your answers to parts a and b, does it matter from which direction an equilibrium position is reached?

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Q: 4 atm. 2H2S(g)⇌2H2(g)+S2(g)         KP =2.2×10−6

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