A voltaic cell consists of a $Z\frac{n}{Z}{n}^{2+}$ half$-$cell and a $N\frac{i}{N}{i}^{2+}$ half$-$

cell at $25C.$ The initial concentrations of $N{i}^{2+}$ and $Z{n}^{2+}$ are $1\mathrm{.}60$

$mol{L}^{-1}$ and $0\mathrm{.}100mol{L}^{-1},$ respectively.

$Z{n}^{2+}(aq)+2e^{-}Zn(s),E=-0\mathrm{.}76V$

$N{i}^{2+}(aq)+2e^{-}Ni(s),E=-0\mathrm{.}23V$

What is the initial cell potential?

Express your answer to two decimal places and include the appropriate units.

Part B

What is the cell potential when the concentration of $N{i}^{2+}$ has fallen to $0\mathrm{.}600mol{L}^{-1}?$ Assume that both half$-$cells have the same volume.

Express your answer to two decimal places and include the appropriate units.

$E_{\text{c}\text{e}\text{l}\text{l}}=,$

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Part C

What are the concentrations of $N{i}^{2+}$ and $Z{n}^{2+}$ when the cell potential falls to $0\mathrm{.}46V?$

Express your answers using two significant figures separated by a comma.