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

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

14.

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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