Answer to Question #110262 in General Chemistry for Ash

Question

There are many naturally-occurring copper ores. Of the choices, identify the one with the greatest percentage of copper metal by mass?
A) Covalite, CuS
B) Malachite, CuCo3 • Cu(OH)2
C) Azurite, 2CuCO3 • Cu(OH)2
D) Bornite, 2CU2S • CuS • FeS
E) Tennanite, Cu12As4S15 • 5H2O

Answer 1

ORE NAME MOLAR MASS OF ORE PERCENTAGE OF COPPER

A) Covalite, CuS 95.6 66.4%

B) Malachite, CuCO₃ • Cu(OH)₂ 221.1 57.44%

C) Azurite, 2CuCO₃ • Cu(OH)₂ 344.6 55.28%

D) Bornite, 2CU₂S • CuS • FeS 501.8 63.27%

E) Tennanite, Cu₁₂As₄S₁₅ • 5H₂O 1561.4 48.8%

SO from the above table we can clearly see that the ore named Covalite has maximum copper percentage