A zinc-copper battery is constructed as follows at 25°C.

Zn|Zn^2+ (0.15 M)||Cu2+(3.00 M)|Cu

The mass of each electrode is 200. g.

a) Calculate the cell potential when this battery is first connected.
- i got this to be 1.14V

b.) Calculate the cell potential after 10.0 A of current has flowed for 10.0 h

(c) Calculate the mass of each electrode after 10.0 h.

d) How long can this battery deliver a current of 10.0 A before it goes dead?

please help! i just can't seem to figure out how to calculate the concentrations of the Zn^2+ and Cu^2+ after the current has flowed through.
-thanks.