8. Metallic aluminum is obtained by electrolysis of molten Al2O3 in cryolite at a voltage of 4.0 - 4.5 V. Determine the maximum power consumption for obtaining 1000 kg of aluminum? How many kilograms of metal can be obtained in this way by the action of a current with a strength of 150 kA during the day? The current efficiency is 0.875.

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