Ask Question
6 October, 14:57

An average copper penny minted in the 1960s contained about 3.000 g of copper. how much chalcopyrite had be mined to produce 100 pennies?

+2
Answers (1)
  1. 6 October, 15:10
    0
    To know the answer, determine first the mass of the copper used:

    Copper used = 100 pennies x 3.0g Cu per penny = 300.0 g Cu

    then, determine the pathway and molar ratio from Cu formed back to CuFeS2 required using the balanced reactions:

    1 Cu2S from 2 CuS; 2Cu from 1 Cu2S; 2CuS from 2CuFeS2

    Therefore 2Cu from 2CuFeS2, they are in a one to one molar ratio.

    then, convert g Cu to moles and g of CuFeS2:

    = 300.0 g Cu * 1 mol Cu/63.546g Cu * 2 mol CuFeS2/2 moles Cu

    = 4.72 moles CuFeS2

    chalcopyrite had to be mined = 4.72 moles CuFeS2 * 183.54 g CuFeS2/1 mole CuFeS2 = 866.49 g CuFeS2
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “An average copper penny minted in the 1960s contained about 3.000 g of copper. how much chalcopyrite had be mined to produce 100 pennies? ...” in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers