Consider the following reaction:   A2 (g) + B2 (g) ⇄ 2AB (g)  Kp = 25.6 The three species are mixed in a 5.000 L flask and have the following partial pressures:  PAB = 0.520 atm, PA₂ = 0.020 atm, PB₂ =  0.450 atm. What is the equilibrium partial pressure of AB in atm?

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