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Consider then galvanic cell based on the following half-reactions: Mn^2+ + 2e^- → Mn E° = -1.18 V Fe^2+ + 2e^- → Fe E° = -0.44 V c. Calculate Ecell at 25 °C when [Mn^2+] = 0.10 M and [Fe^2+] = 4.0 x 10^-6 M.