Al 2O 3 is reduced by electrolysis at low potentials and high currents. If 4.0 10 4 amperes of current is passed through molten Al 2O 3 for 6 hours, what mass of aluminium is produced ? (Assume 100% current efficiency, at. mass of Al = 27 g mol -1 ) -

1. A. 1.3 10 4 g
2. B. 9.0 10 3 g
3. C. 8.1 10 4 g
4. D. 2.4 10 5 g

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