The product sodium chlorides dissolved in water to separate it from titanium at 30 degree Celsius the solubility of sodium chloride is 36 kg per 100 dm³.Calculate the minimum volume of water in dm³, at 30°C needed to dissolve 1989 sodium chloride.​

Can someone me with questions 12 and 13 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.

The identities of substances are the same before and after which type of change