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the mass of CuO in the mixture

A 0.500 gram mixture of Cu2O and CuO contains 0.425 grams of Cu. What is the mass of CuO in the mixture?

I have the answer it is .21 grams of CuO I just need a formula and step by step instructions on how to arrive at this answer. I would love this answer back as soon as possible thank you. -Paul L. Hollis

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I've done the problem several ways and still get the same answer ---> 0.180g CuO
So I'm not sure if your book is wrong or what. Was there a chemical equation with this ...

Solution Summary

It shows how to find the mass of CuO in the mixture.