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Q.
What is the molecular formula of copper pyrites?
General Principles and Processes of Isolation of Elements
Solution:
Copper occurs both in combined state and free state. The important ores of copper are copper pyrites $(CuFeS_{2})$, cuprite $\left( Cu _{2} O \right)$ and copper glance $\left( Cu _{2} S \right)$. Copper is generally extracted from copper pyrites ($CuFeS_{2}$ ) in a number of steps.