b) If the initial concentration of S02Cl2 is 0.150 M, what is the concentration of SO2Cl2 after 3.00 x 102 seconds? 2) The decomposition of XY is second order in XY and has a rate constant of 7.02 x 10-3M- 15-1 at a certain temperature. a) If the initial concentration of XY is 0.125 M, how long will it take for the concentration to decrease to 0.058 M? b) If the initial concentration of XY is 0.050 M, what is the concentration of XY after 3.50 x 102 seconds