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Question
When hydrogen is passed over copper oxide, copper and steam are formed. Write a balanced equation for this reaction and state which of the chemicals are elements.
Solution
The balanced equation for the reaction of hydrogen gas and copper oxide is written as follows:
H2 (g) + CuO (s)→ Cu (s) + H2O (g)
Elements: Hydrogen (H2) in reactants' side and copper (Cu) in products' side are elements.
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