For the above current at 3.01 V, how much electrical energy (in kw-hr) is consumed in the production of 1 kg of aluminum? (A kW-hr is 3.6 x106 J.)

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The electrolysis of molten A12O3 at 980 ºC is used to produce metallic aluminum. A current of 409 A is used in the electrolysis cell. What is the rate of formation of aluminum, in kilograms per hour? —the answer is 0.13734