52. The reaction of calcium hydride, CaH2, with water can be characterized as a Lewis acid-base reaction: CaH2(s) + 2H2 O(l) ⟶ Ca(OH)2(aq) + 2H2(g)

Identify the Lewis acid and the Lewis base among the reactants. The reaction is also an

oxidation-reduction reaction. Identify the oxidizing agent, the reducing agent, and the changes in

oxidation number that occur in the reaction.

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.

Connect the whole numbers on the periodic table to indicate what they represent?

All motion is caused by force? true or false