Question 17 4 pts
A voltaic cell can be prepared from copper and tin. What is the
Eºcell for the cell that forms from the following half-reactions?
Cu2+(aq) + 2e
>
Cu(s)
E° = 0.34 v
Snº+(aq) + 2e
www.
> Sn2+(aq)
E° = 0.13 V

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 think its 100

i hope this !