A reaction mixture initially contains 0. 56 atm CO 2 and 0. 32 atm CO. Determine the equilibrium pressure of CO if K p for the reaction at this temperature is 2. 25. A. 0. 83 atm B. 0. 31 atm C. 0. 26 atm D. 0. 58 atm E. 0. 42 atm