At 25°C, gaseous SO2Cl2 decomposes to SO2 (g) and Cl2 (g) to the extent that 12.5% of the original SO2Cl2 (by moles) has decomposed to reach equilibrium. The total pressure at equilibrium is 0.900 atm. Calculate the value of Kp for this system. (Hint: Set as Po the initial pressure of SO2Cl2 and x the amount that has decomposed. Set 2 equations to solve for Po and x).