The second-order rate constants for the reaction of oxygen atoms witharomatic hydrocarbons have been measured (r. atkinson and j. n. pitts, j. phys. chem.79, 295 ( in the reaction with benzene the rate constantsare 1.44 ×107dm3mol−1s−1at 300.3 k, 3.03 ×107dm3mol−1s−1at 341.2 k, and 6.9 ×107dm3mol−1s−1at 392.2 k. find the pre-exponential factor andactivation energy of the reaction.

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

An experimental procedure requires a 10 ml of acid to be dissolved

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.