Using the standard half-cell potential listed, calculated the equilibrium constant for the react...

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Using the standard half-cell potential listed, calculated the equilibrium constant for the reaction:
math xmlns=http://www.w3.org/1998/Math/MathMLmiCo/mimo(/momi mathvariant=normals/mimo)/momo+/momn2/mnmsupmi mathvariant=normalH/mimo+/mo/msupmo(/momiaq/mimo)/momo→/momsupmiCo/mimrowmn2/mnmo+/mo/mrow/msupmo(/momiaq/mimo)/momo+/momsubmi mathvariant=normalH/mimn2/mn/msubmo(/momo /momi mathvariant=normalg/mimo)/momtext at /mtextmn298/mnmo /momi mathvariant=normalK/mi/math
\( \mathrm{Co}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightarrow \operatorname{Co}(\mathrm{s}) \mathrm{E}^{\circ}=-0.277 \mathrm{~V} \)
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