Estimate the heat of neutralization of h3po4 in kj/mol given these data: heat transferred = 2.2 x 102 j moles of h3po4 = 1.5 x 10−3 mol moles of naoh = 5.0 x 10−3 mol

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

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.

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?