Friday
November 28, 2014

Homework Help: chemistry

Posted by abby on Friday, November 13, 2009 at 12:24am.

when heated in the presence of air, 80 grms. of copper completely react to form 100 grms. of copper oxide

what is the mass of oxygen that has combined with the copper?

how much copper must be heated to form 300 grms. of copper oxide?

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