How do I find hight in potential energy?

In the derivation of rrkm theory, a factor of 1/2 is introduced when equalizing the rates of formation and decomposition of activated complex as keal-hr) = ko this is clearly against the assumption of transition state theory that states all the activated complex in the transition state iss going to the product. find the reason why this factor is introduced here.

=force × distance a. work b. velocity c. pressure d. momentum

How to tell if a molecule is polar or nonpolar with electronegativity