What is the rate law for single step reaction? And could you possibly explain how you got the answer.? Reaction CH_4 (g) + Cl_2(g) --> CH_3 (g) + HCl (g) I have the choices of a) [CH_3][HCl]/[CH_4][Cl_2] b) k [CH_3][HCl]/[CH_4][Cl_2] c) k [CH_4][Cl_2] d) k [CH_3][HCl]