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  1. Copper(II) oxide - Wikipedia

  2. Cupric Oxide | CuO | CID 164827 - PubChem

  3. Copper (II) Oxide | Formula, Properties & Application

  4. Copper(II) oxide - Simple English Wikipedia, the free ...

  5. Copper oxide | CuO | CID 14829 - PubChem

  6. Copper (II) oxide - Wikiwand

  7. copper oxide - NIST Chemistry WebBook

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