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Give the units of the rate constants in terms of the power x in. M^x time-1 for reactions with the following overall orders. a) first order. b) 5/2 order. I know the units for the first order are. Mol L^-1 / s = k(mol L-1). K = s^-1. but in terms of what the question is asking, the x , I don't understand what they want...
Rating Newest Oldest. Best Answer: The rate of a reaction, r, depends on concentration. They are related by the rate law: r=k*dc/dt. But the rate constant, k, is a function of Temperature ONLY, NOT concentration.Overall activation energy will depend upon the amount of reactant you have (i.e. moles of reactant), but the activation energy per mole will not be affected by the concentration.ating Newest Oldest. Best Answer: The rate of a reaction, r, depends on concentration. They are related by the rate law: r=k*dc/dt. But the rate constant, k, is a function of Temperature ONLY, NOT concentration.