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    chemistry help please Chmeistry?

    the smelting process of chalcopyrite, CuFeS2 is represented by the following equation 2 CuFeS2 + 5O2 2 Cu+ 2FeO+4SO2 if 22.0kg of the chalcopyrite reacts and the percentage yield for this process is 95% calculate the mass of copper formed...
  2. C

    I need help with this chemistry question on moles?

    "A silver coin was analyzed and found to contain only silver and copper. 1.580 g of this coin was dissolved in concentrated nitric acid and the resultant solution diluted. reaction of the solution with excess hydrochloric acid yielded 1.050 g of silver chloride. calculate the percentage of...
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