Use the data from this table of thermodynamic properties to calculate the values of δs°rxn for each of the following reactions at 25 °c. a) 4nh3(g) + 7o2(g) > 4no2(g) + 6h2o(g) delta s rxn =? b) 2h2o2(l) --> 2h2o(l) +o2 (g) delta s rxn =?

Can someone me with questions 15 to 17 plz.

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.

In the particles are arranged in a regular, repeating pattern. a)a crystalline liquid b)a crystalline solid c)all gases d)all solids