Question

"Native," or elemental copper can be found in nature, but most copper is mined as oxide or sulfide minerals. Chalcopyrite (CuFeS2) is one copper mineral that can be converted to elemental copper in a series of chemical steps. Reacting chalcopyrite with oxygen at high temperature produces a mixture of copper sulfide and iron oxide. The iron oxide is separated from CuS by reaction with sand (SiO2). CuS is converted to Cu2S in the process and the Cu2S is burned in air to produce Cu and SO2: 2CuFeS2 + 3O2 ? 2CuS + 2FeO + 2SO2 2FeO + 2SiO2 ? 2FeSiO3 2CuS ? Cu2S + S Cu2S + S + 2O2 ? 2Cu + 2SO2 Part 1 (1 pt) 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? 866.6 g CuFeS2 Part 2 (1 pt) How much chalcopyrite had to be mined to produce 100 pennies if reaction 1 had a percent yield of 64.00 % and all other reaction steps had yield of 100%? 1354.06 g CuFeS2 Part 3 (1 pt) How much chalcopyrite had be mined to produce 100 pennies if each reaction involving copper proceeded in 64.00 % yield? 5167.53 g CuFeS2

          "Native," or elemental copper can be found in nature, but most copper is mined as oxide or sulfide minerals. Chalcopyrite (CuFeS2) is one copper mineral that can be converted to elemental copper in a series of chemical steps. Reacting chalcopyrite with oxygen at high temperature produces a mixture of copper sulfide and iron oxide. The iron oxide is separated from CuS by reaction with sand (SiO2). CuS is converted to Cu2S in the process and the Cu2S is burned in air to produce Cu and SO2:

2CuFeS2 + 3O2 ? 2CuS + 2FeO + 2SO2
2FeO + 2SiO2 ? 2FeSiO3
2CuS ? Cu2S + S
Cu2S + S + 2O2 ? 2Cu + 2SO2

Part 1 (1 pt)
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?
866.6 g CuFeS2

Part 2 (1 pt)
How much chalcopyrite had to be mined to produce 100 pennies if reaction 1 had a percent yield of 64.00 % and all other reaction steps had yield of 100%?
1354.06 g CuFeS2

Part 3 (1 pt)
How much chalcopyrite had be mined to produce 100 pennies if each reaction involving copper proceeded in 64.00 % yield?
5167.53 g CuFeS2

"Native," or elemental copper can be found in nature, but most copper is mined as oxide or sulfide minerals. Chalcopyrite (CuFeS2) is one copper mineral that can be converted to elemental copper in a series of chemical steps. Reacting chalcopyrite with oxygen at high temperature produces a mixture of copper sulfide and iron oxide. The iron oxide is separated from CuS by reaction with sand (SiO2). CuS is converted to Cu2S in the process and the Cu2S is burned in air to produce Cu and SO2:

2CuFeS2 + 3O2 ? 2CuS + 2FeO + 2SO2
2FeO + 2SiO2 ? 2FeSiO3
2CuS ? Cu2S + S
Cu2S + S + 2O2 ? 2Cu + 2SO2

Part 1 (1 pt)
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?
866.6 g CuFeS2

Part 2 (1 pt)
How much chalcopyrite had to be mined to produce 100 pennies if reaction 1 had a percent yield of 64.00 % and all other reaction steps had yield of 100%?
1354.06 g CuFeS2

Part 3 (1 pt)
How much chalcopyrite had be mined to produce 100 pennies if each reaction involving copper proceeded in 64.00 % yield?
5167.53 g CuFeS2

Added by Katrina B.

Question

Please give Ace some feedback