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Answer any seven questions of the follow...

Answer any seven questions of the following:
`CuSO_4` solution is electrolysed for 20 minutes with a current of 3 amperes. What mass of copper will be deposited at the cathode?

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A solution of MgSO_(4) is electrolysed for 20 min with a current of 1.5A. What mass of magnesium is deposited at the cathode?

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