In each case tell which SN2 reaction will proceed faster. 1. The displacement by CH3CO2- on 1-bromopropane in (a) dimethylformamide or (b) water. 2. The displacement by OH- on CH3CH2I in (a) ethanol or (b) dimethyl sulfoxide.

Temperature and kinetic energy are proportional. a) adirectly b) directly c) indirectly

Blank allows you to do calculations for situations in which only the amount of gas is constant a)boyle's law b)combined gas law c)ideal gas law d)dalton's law

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.