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If /\G^(@) for the half cell MnO4^(-)"|"...

If `/_\G^(@)` for the half cell `MnO_4^(-)"|"MnO_2` in an acid solution is -xF; then find the value of x.(Given:`E_(MnO_4^(-)"|"Mn^(2+))^(@)=1.5V,E_(MnO_2"|"Mn^(2+))^(@)=1.25V`)

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