[G-funk]

i have missed a few lectures so am behind due to ilnnes could you help me out with these questions

1) the following reaction occurs in a voltaic cell
02(g) + 4H+(aq) + 4Br-(aq) > 2H2O + 2Br2(l)

Calculate the cell votage,E, in volts, at 25celcius when 02=98 Kpa pressure, [H+]=0.34M, [Br-]=0.42M and Eo cell= 0.14V

anzwer to 3 sig fig



2)the reaction in a voltaic cell is
Zn(s) + 2H+(aq) > Zn2+(aq) + H2(g)

The cell voltage is 0.213V when [Zn2+] = 0.53M, ppH2 =125 Kpa. what is [H+] in the cathode half of the cell?

anzwer 3 sig fig

cheers any help would be awsome i tried and got a few answers but missing the lecture has put me in the dark a bit.