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April 18, 2014

Homework Help: chemistry 21

Posted by lee on Sunday, January 31, 2010 at 12:15am.

13. Pure copper may be produced by the reaction of copper(I) sulfide with oxygen gas as
follows:
Cu2S(s) + O2(g) _ 2Cu(s) + SO2(g)
If the reaction of 0.540 kg of copper(I) sulfide with excess oxygen produces 0.140 kg of
copper metal, what is the percent yield?
A) 32.5%
B) 25.9%
C) 64.9%
D) 130%
E) 39.9%

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