Molten Al₂O₃ Is Reduced by Electrolysis at Low Potentials and High

Multiple Choice

Molten Al₂O₃ is reduced by electrolysis at low potentials and high currents.If 7.5 × 10³ amperes of current is passed through molten Al₂O₃ for 12.0 hours,what mass of Al is produced? Assume 100% current efficiency.

A) 5.0 × 10² g
B) 3.0 × 10⁴ g
C) 9.1 × 10⁴ g
D) 2.7 × 10⁵ g
E) 3.1 × 10⁶ g