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As Q = i × t, ∴ Q = 4.0 × 10⁴ × 6 × 60 × 60 C = 8.64 × 10⁸ C. Now since 96500 C liberates 9 g of Al, 8.64 × 10⁸ C liberates 9 / 96500 × 8.64 × 10⁸ g Al = 8.1 × 10⁴ g of Al.

1. Q = 8.64 × 10⁸ C
2. 96500 C liberates 9 g of Al
3. 8.1 × 10⁴ g of Al
4. t = 6 × 60 × 60 sec

Correct answer: 8.1 × 10⁴ g of Al

Solution

The final result of the calculation is 8.1 × 10⁴ g of Al, which matches option C. The other options are intermediate steps or constants used in the calculation.

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