A mixture of 1 atm chlorine gas and 1 atm oxygen gas and no product undergoes this reaction. Cl2 + 2 O2 ---> 2 ClO2 What equation would be used to solve for the equilibrium concentrations? A. (2x)2 / ((1-x)(1-2x)) = kp B. (2x)2 / ((1-x)(1-2x)2) = kp C. (2x)2 / ((1-x)(1-x)) = kp D. (x)2 / ((1-x)(1-x)) = kp