Copper oxide ore, CuO, can be smelted with carbon to make copper metal and carbon dioxide.
2CuO(s) + C(s) 2Cu(s) + CO2(g)
If 100.0 of a mixed ore is smelted and produces 75.9 grams of pure copper. What percentage of the mixed ore is CuO? (You can assume the reaction yield is 100%, there is excess carbon, and that CuO is the only source of copper.)
A) 28.0%
B) 48.5%
C) 75.9%
D) 79.9%
E) 95.0%
Correct Answer:
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