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For the isomerization reaction: butane ⇌ isobutane Kp equals 25 at 500°C. If the initial pressures of butane and isobutane are 30. atm and 0.0 atm, respectively, what are the pressures of the two gases at equilbrium? A) P(butane) = 29 atm andP(isobutane) = 1.2 atm B) P(butane) = 1.2 atm andP(isobutane) = 30. atm C) P(butane) = 1.2 atm andP(isobutane) = 29 atm D) P(butane) = 30 atm andP(isobutane) = 1.2 atm