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

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

i just learnt this recently but i need to look through my notes again

10 years is the answer

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.