Which statement best describes the process that the diagrams show? A solid loses kinetic energy to become a liquid and then becomes a gas. A solid gains kinetic energy to become a liquid and then becomes a gas. A gas loses kinetic energy to become a liquid and then becomes a solid. A gas gains kinetic energy to become a liquid and then becomes a solid.

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.

Areaction in which products can react to re-form reactants is

How many moles of cu are needed to react with 5.8 moles of agno3? cu + 2 agno3 → cu(no3)2 + 2 ag