14. Chalcopyrite (CuFeS₂) is a mineral that can be converted to elemental copper in a series of three chemical steps: 2 CuFeS2(s) + 3 O2(g) → 2 CuS(s) + 2 FeO(s) + 2 SO2(g) 16 CuS(s) → 8 Cu2S(s) + S8(s) Cu2S(s) + O2(g) → 2 Cu(s) + SO2(g) If the average copper penny from the 1960s has a mass of 3.0 grams, and assuming each reaction proceeds in 100% yield, how much chalcopyrite, in grams, had to be mined to produce one dollar's worth of pennies? Hint: Start with the third equation and work back to the first doing calculations stepwise.
14. Chalcopyrite (CuFeS₂) is a mineral that can be converted to elemental copper in a series of three chemical steps: 2 CuFeS2(s) + 3 O2(g) → 2 CuS(s) + 2 FeO(s) + 2 SO2(g) 16 CuS(s) → 8 Cu2S(s) + S8(s) Cu2S(s) + O2(g) → 2 Cu(s) + SO2(g) If the average copper penny from the 1960s has a mass of 3.0 grams, and assuming each reaction proceeds in 100% yield, how much chalcopyrite, in grams, had to be mined to produce one dollar's worth of pennies? Hint: Start with the third equation and work back to the first doing calculations stepwise.
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
Section: Chapter Questions
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14.
Transcribed Image Text:14. Chalcopyrite (CuFeS₂) is a mineral that can be converted to elemental copper in a series of three
chemical steps:
2 CuFeS2(s) + 3 O2(g) → 2 CuS(s) + 2 FeO(s) +2 SO2(g)
16 CuS(s) → 8 Cu₂S(s) + S8(s)
Cu₂S(s) + O2(g) → 2 Cu(s) + SO2(g)
If the average copper penny from the 1960s has a mass of 3.0 grams, and assuming each reaction
proceeds in 100% yield, how much chalcopyrite, in grams, had to be mined to produce one dollar's worth
of pennies? Hint: Start with the third equation and work back to the first doing calculations stepwise.
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