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Calculate the percentage by mass of copper in copper oxide (Cu20) |
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Answer» I think you mean copper(I) OXIDE, Cu₂O, and that you are asking for the percentage by mass of copper in this COMPOUND. WELL, look up the atomic weights of copper and oxygen; add them appropriately; divide the total for the copper by the total for the molecule; then multiply by 100 to GET it as a percentage. |
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