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A 1.10 g sample of copper ore is dissolv...

A `1.10 g` sample of copper ore is dissolved and the `Cu^(2+)` of is treated with excess `KI`. The liberated `I_(2)` requires `12.12 mL` of `0.10M Na_(2)S_(2)O_(3)` solution for titration. Find the `%` copper by mass in ore.

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