Rate law equations

[Anika_Patel_1G]

What is the difference between the equations Rate=k x [concentration]^a and (-1/a)*(d[A]/dt)?

[Lourick Bustamante 1B]

The two equations are equal to each other; therefore, you can use either one. The equation k[R]^n is just the other reaction rate equation reexpressed after doing experiments to observe d[R]/dt. The equation k[R]^n is in terms of the rate constant, k, the concentration of reactant, [R], and the order of reactant, n.

[Wenxin Fan 1J]

They are the same. They are only written using different variables but they ultimately represent the same thing.

[Emma Li 2C]

I think the second one is described as the unique instantaneous rate of a reaction, and the first one as the rate law but they should calculate the same thing!