Question

write chemical equation of this question
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Answer 1

Answer:

Please refer to the picture

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Answer 2

On heating copper powder in air the surface of copper powder becomes coated with black CuO

And the equation for it would be

Cu+ O2——› Cuo

• And then this black coating can be converted into brown copper,this process can be used by passing hydrogen gas over the black CuO,then the black CuO will convert to brown copper.The relatable equation is

CuO+H2–—› Cu+H2O

here the copper is brown in colour.