This in turn determines the units of the rate constant.
Reactions that proceed from two competing mechanisms may not follow this principle. Related to the Maxwell Distribution Law by a factor of the exponential of Avogadro's Number, the assumption that the collision rate and steric factor will remain constant produces this equation's namesake pre-exponential factor.  This in turn determines the units of the rate constant. FTP, name this kinetic equation relating the temperature and activation energy of a reaction, named for a Swedish chemist.
Reactions that proceed from two competing mechanisms may not follow this principle.
Arrhenius Equation