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How long (in hours) must a current of 8.95 amps be passed to produce 92.4 g of lead metal from a solution of aqueous lead(IV)nitrate? Give your answer to 1 decimal place.
Copper metal is purified by electrolysis. How much copper metal could be produced from copper(II) oxide by applying a current of 10.0 amps at the appropriate negative potential for 12.0 hours?