15. For the reaction 2 NO(g) + Cl2(g) - 2 NOCI(g) rate = k [NO] [Cl] what is the effect on the rate if the concentration of NO is tripled and that of Ciz is doubled? A. The rate will increase by a factor of eighteen. B. The rate will increase by a factor of six. C. The rate will increase by a factor of twenty-four. D. The rate will decrease by a factor of twelve