In a zinc manganese dioxide dry cell, th...

In a zinc manganese dioxide dry cell, the anode is madeup of `Zn` and cathode of carbon rod surrounded by a mixture of `MnO_(2)`, carbon, `NH_(4)Cl`, and `ZnCl_(2)` in aqueous base. The cathodic reaction is `: `
`MnO_(2)(s)+Zn^(2+)+2e^(-) rarr ZnMn_(2)O_(4)(s)`
`8.7g` of `MnO_(2)` is taken in the cathodic compartment. How many days will the dry cell continue to give a current of `9.65xx10^(-3)A` ? `(` Atomic weight of `Mn=55)(Mw` of `MnO_(2)=87g mol^(-1))`

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The correct Answer is:

25.675 day

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