The law of original horizontality explains: A why rocks harden
B why rocks appear in layers
C how sedimentary rock forms
D why rock layers are always flat
EARTH SCIENCE

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.

What substance has a mass of 9.5g and volume of 2.1cm^3

You have a liquid that exhibits diltancy. you want to pour it from a bottle. what should you do to the bottle before pouring