question_answer

If the following half cells have the \[E{}^\circ \] values as \[F{{e}^{+3}}+{{e}^{-}}\xrightarrow{{}}F{{e}^{+2}};\] \[{{E}^{o}}=+0.77V\] and \[F{{e}^{+2}}+2{{e}^{-}}\xrightarrow{{}}Fe;\]\[{{E}^{o}}=-0.44V.\]The \[{{E}^{o}}\] of the half cell \[F{{e}^{+3}}+3{{e}^{-}}\xrightarrow{{}}Fe\] will be

A)  \[0.33\,V\]                    

B)  \[1.21\,V\]

C)  \[0.04\,V\]                    

D)  \[0.605\,V\]