Avoltaic cell is constructed from an ni2+(aq)−ni(s) half-cell and an ag+(aq)−ag(s) half-cell. the initial concentration of ni2+(aq) in the ni2+−ni half-cell is [ni2+]= 1.40×10−2 m . the initial cell voltage is +1.12 v .

Explanation:

For what I can see, is missing the concentration of [Ag+] in the half-cell. To calculate it:

Niquel half-cell

Oxidation reaction:

Assuming T=298 K / R=8.314 J/mol K / F=96500 C

Silver half-cell

Reduction reaction:

Assuming T=298 K / R=8.314 J/mol K / F=96500 C

b. is the answer hoped i