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OpenStudy (vera_ewing):
Which of the following reactions represent the change of copper ore to copper metal? A. 2CuS + 6O2 + C → 2SO2 + 2Cu + CO2 B. 2CuS + 3O2 + C → 2SO2 + 2Cu + CO C. 2CuS + 3O2 + C → 2SO2 + 2Cu + CO2 D. 2CuS + 3O2 + CO2 → 2SO2 + 2Cu
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