3. Consider the galvanic cell based on the following half-reactions:
Zn⁺²+2 e^-→ Zn, E°= -0.76 V； Fe⁺²+2e→ Fe, E°=-0.44 V.
What's E°cell (in V) at 25 °C if [Zn⁺²] = 0.10 M and [Fe⁺²] = 1.0x10^-5 M?
(A) 0.32
(B) 0.28
(C) 0.26
(D) 0.23
(E) 0.20

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