The negative Zn pole of a Daniell cell, ...

The negative Zn pole of a Daniell cell, sending a constant current through a circuit, decreases in mass by 0.13 g in 30 minutes. If the electeochemical equivalent of Zn and Cu are 32.5 and 31.5 respectively, the increase in the mass of the positive. Cu pole in this time is

0.180 g

0.141 g

0.126 g

0.242 g

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