The teacher was not in the room yet. Randy began opening containers of chemicals, touching them with his hands. His cheek itches so he rubbed it. Explain how Randy was not acting safety in the the laboratory. I know the answer I just don’t know how to word it. Please help. Due by 11:59 tonight

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

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.

Particles vibrate in a rigid structure and do not move relative to their neighbors.