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  1. Urea - Wikipedia

  2. Urea | Definition, Formula, Production, Uses, & Facts | Britannica

  3. Urea | NH2CONH2 | CID 1176 - PubChem

  4. Urea (CH₄N₂O) - Definition, Structure, Preparation, Properties, …

  5. Urea - American Chemical Society

  6. Urea - CH4N2O Structure, Properties, and Uses - BYJU'S

  7. Urea Formula - Chemical and Structural Formula of Urea

  8. Urea Formula - Chemical Formula, Structure, Molecular Formula

  9. Urea Formula - Softschools.com

  10. Urea Formula, Structure, and Uses - Toppr

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