What are the units of k in the rate law and how do they relate to the reaction orders?

Question

How do you know stuff like: if the reaction is first order in A and second order in B, and time is measured in minutes, what are the unts for k? This is just for the general equation aA +bB --> cC +dD

Answer 1

The rate law is: v = k*[A]*[B]^2

Solve for k:

k = v/([A]*[B]^2) and v is in mol/L*min, [A] in mol/L and [B] in mol/L, so:

k units are: L^2/(mol^2*min)