The lennard - jones parameters for benzene are: 8 = 5.27 å, and /k = 440 k, where k is boltzmann's constant. evaluate the molecular separation distance corresponding to the minimum of the potential well. if the mean molecular separation in liquid benzene at a given temperature is just 1% greater than the separation at the potential minimum, calculate the attractive force between a pair of molecules at this distance.

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.