The chemical formula of copper pyrites is:

• A. CuFe₂
• B. Cu₂S
• C. Cu₂O
• D. CuCO₃·Cu(OH)₂

The chemical formula of copper pyrites, also known as chalcopyrite, is represented as:

Correct Answer

A. CuFe₂S₂

Explanation

Copper pyrites is primarily composed of copper, iron, and sulfur. The formula indicates that each molecule contains two iron atoms along with one copper atom and two sulfur atoms.

Other Options

• B. Cu₂S - This is the formula for chalcocite, another copper mineral.
• C. Cu₂O - This represents cuprous oxide, a different compound.
• D. CuCO₃·Cu(OH)₂ - This is the formula for malachite, a copper carbonate mineral.

Understanding these formulas helps in identifying different minerals and their compositions in geology and chemistry.