5. An unsaturated solution is made by dissolving 100 B Al(NO 1 ) 3 in 100 g of H_{2}*O at 80 degrees * C The solution is then allowed to cool to room temperature (20 degrees * C) a Assuming the solution does not become supersaturated, as what temperature will crystals of Al * (N*O_{1}) first appear in the solution? b . What is the total mass of Al(NO 3 ) 3 that will crystallize when the solution has reached 20 degrees * C

What happens to the atomic radius when an elctron is lost

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.

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.