Hydrogen gas passed over a heated sample of the oxide of copper in a ceramic container. The oxide of copper was reduced to copper metal. The following masses were measured. Mass of ceramic container = 12.64 g, Mass of ceramic container + oxide of copper = 15.88 g, Mass of ceramic container + copper = 15.52 g Use these values to work out the formula of this oxide of copper.
CuO3
Cu04
CuO2
CuO
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Explanation:
When hydrogen gas is passed over heated copper (II) oxide, copper and steam are formed.
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