Physical Chemistry

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Three electrolytic cells containing solutions of CuNO3, Sn(NO3)2, and Fe(NO3)3, respectively, are connected in series. A current of 2.2 A is passed through the cells until 3.10 g of copper has been deposited in the cell.
(a) What masses of tin and iron are deposited?
tin
g
iron
g

(b) For how long did the current flow?

do i just use It=nF?? not sure how to do it with 3 diff substances tho..

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