A button cell used in watches functions as following <br> Zn(s)+Ag2O(s)+H2O(l)⇌2Ag(s)+Zn2+(aq)+2OH−(aq) <br> If half cell potentials are <br> Zn2+(aq)+2e−→Zn(s);Eo=−0.76V <br> Ag2O(s)+H2O(l)+2e−→2Ag(s)+2OH−(aq),Eo=0.34V <br> The cell potential will be -