calculate rhe value of avoagdro constt. ....

Ans 2) Dunno if it's correct or not

Cu²⁺ + 2e- → Cu, ................ Eº = + 0.34 V
Cu²⁺ + e- → Cu⁺ ................ Eº = + 0.15 V
Cu + Cu²⁺ → 2Cu⁺ ................ E° = + x V

Since e.m.f is an extensive property and it cannot be added whereas change in free enrgy is an extensive prop and these r additive.
Using cahnge in free energy = -nFE° , we get

(2X0.34) + (1 X 0.15) = x
Thus, x = 0.73 V
Using Nernst equation, we get
0.73 = 0.06 ln Q
Thus, ln Q = 12.166 (approx.)
and Q= ......

Someone please verify the answer