A possible mechanism for a reaction that takes place in solution is Step(l): Ce^4+ + Mn^2+ --- rightarrow Ce^3+ + Mn^3+ slow Step (2) Ce^4+ + Mn^3+ --- rightarrow Ce^3+ + Mn^4+ fast Step (3): Mn^4+ + Tl^1+ ---- rightarrow Mn^2+ + Tl^3+ fast What is the for the overall reaction what is the predicted rate law which species is (are) intermediates, and which species is the catalyst? A sample of N_2O_4 (0.400 mol) was placed in an empty 1.00 L container at 500 K. After equilibrium was reached, the concentration of NO_2 was found to be 6.29 times 10^-4 M. Calculate the value of k_c at 500 K for the reaction: N_2O_4(g) Equilibrium 2 NO_2(g)