Epimers are monosaccharide diastereoisomers that have a single asymmetric carbon. anomers are diastereoisomers in which the hemiacetal carbon of a cyclic monosaccharide is asymmetric. determine whether each pair of monosaccharides consists of epimers, anomers, or an aldose-ketose pair.

Which actions would increase the rate at salt dissolves in water? stir the water? crush the salt? use less water? heat the water? cool the salt

Chemical kinetics what was the rate of reaction in trial 3? choose the closest answer.

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.