Calculate the amount of pure aluminium obtained when 100 g of impure `Al_(2)O_(3)` of 85% pure is reduced electrolytically as under
`2Al_(2)O_(3)to4Al+3O_(2)(Al=27,O=16)`

Explanation

To solve the problem of calculating the amount of pure aluminum obtained from 100 g of impure Al₂O₃ that is 85% pure, we can follow these steps:

### Step 1: Determine the weight of pure Al₂O₃
Given that the impure Al₂O₃ is 85% pure, we can calculate the weight of pure Al₂O₃ in the 100 g sample.

\[ \text{Weight of pure Al}_2\text{O}_3 = \text{Purity} \times \text{Total weight} \]
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