Match the terms to their definition. Please help
1. astronaut A person who travels beyond the earth's atmosphere.
2. cosmonaut To lose, such as losing heat.
3. dissipate Relating to tension and stress.
4. microminiaturization The process of producing things of very small size.
5. reliable A Soviet traveler beyond the earth's atmosphere.
6. tensile Giving the same result on successive trials; dependable.

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.