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Write the Nernst equation and emf of the...

Write the Nernst equation and emf of the following'cells at `-298 ~K:` i. `Mg(s) I M_g^2 *(0.001 M) II Cu^2+(0.0001 M) ICu(s)` ii, `Fe(s) I Fe^2+(0.001 M) II H^+(1 M) I H_2(~g)(lbar) I^2` `Pt(s)^*` ii. `Sn(s)` I `Sn^2+(0.050 M) IHH^+(0.020 M) IH(g)(1` 'bar)IPt(s) iv. `Pt(s) IBr_3(I) IBr(0.010 M) IIH^+(0.030 M) L+H_2(~g)` (1 bar)IPt(s).

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