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To find the mass of hydrogen needed to react with 40g of copper oxide (CuO), first calculate the molar mass of CuO. Then, use stoichiometry to determine the moles of CuO present in 40g. From the balanced chemical equation CuO + H2 -> Cu + H2O, you can determine the mole ratio between CuO and H2. Finally, use the molar mass of hydrogen to calculate the mass of hydrogen needed to react.

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1y ago

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How do you separate copper from copper oxide?

I think you mean how do you extract copper from copper oxide, if so here's your answer. Take your copper oxide and heat it with something that is more reactive than copper. Carbon is a good example. The more reactive carbon will oxidise, taking the oxygen from the copper oxide leaving copper. copper oxide + carbon --> copper + carbon dioxide 2Cu0 + C --> 2Cu + CO2


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Copper oxide acts as an oxidizing agent in the test for carbon and hydrogen. It can react with the carbon and hydrogen in the organic compound to form carbon dioxide and water, respectively. By observing the change in color of the copper oxide, we can determine the presence of carbon and hydrogen in the compound.


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What is the chemical reactivity for copper?

Copper is a moderately reactive metal. It can react with oxygen to form copper oxide. It can also react with acids to form copper salts and hydrogen gas. Its reactivity can be increased in the presence of certain chemicals or conditions.


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