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  1. Urea - Wikipedia

  2. Urea | NH2CONH2 | CID 1176 - PubChem

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

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

  5. Urea Formula - Chemical and Structural Formula of Urea …

  6. Urea Formula – Structure, Properties, Uses, Sample Questions

  7. Urea Formula: Definition, Structure, Properties, Preparation, Uses

  8. Urea Formula: Learn Structure, Preparation, Properties and Uses

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

  10. Urea - an overview | ScienceDirect Topics