Aluminum metal is refined in a very energy-intensive process from bauxite ore using the Hall process, which requires electrolysis of aluminum oxide, Al2O3, in molten cryolyte at more than 1012°C. In an industrial electrolysis cell, 1900 kg of aluminum oxide was reduced with a current of 1500 amps. How long did it take to reduce all the reactant to aluminum metal?
A) 1000 hr
B) 2000 hr
C) 330 hr
D) 4000 hr
E) 660 hr
Correct Answer:
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