Question

Pure copper may be produced by the reaction of copper(I) sulfide with oxygen gas as follows: 

Cu2S(s) + O2(G) = 2 Cu (s) + SO2(g) 

If the reaction of 0.530 kg of copper(I) sulfide with excess oxygen produces 0.290 kg of copper metal, what is the percent yield? 

  • 137%
  • 39.9%
  • 54.7%
  • 274%
  • 68.5%

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