Problem: Urea is an organic compound widely used as a fertilizer. Its solubility in water allows it to be made into aqueous fertilizer solutions and applied to crops in a spray.What is the maximum theoretical number of water molecules that one urea molecule can hydrogen bond with? (Ignore shape for the purposes of this answer.) Urea could theoretically form hydrogen bonds with this number of water molecules. (Note, however, that the size and shape of a molecule may limit the number of hydrogen bonds formed by one urea molecule.) 

FREE Expert Solution
  • Hydrogen bonds occurs to Hs attached to an electronegative atom (N, O or F) 
  • Hydrazine has Ns and O in it, O has 2 lone pairs while N has 1. Hence O can accomodate 2 H-bonds while N can have 1
  • There are also Hs on N which is capable of H-bonding with Os of H2O
  • The bonding sites are:
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Problem Details

Urea is an organic compound widely used as a fertilizer. Its solubility in water allows it to be made into aqueous fertilizer solutions and applied to crops in a spray.

What is the maximum theoretical number of water molecules that one urea molecule can hydrogen bond with? (Ignore shape for the purposes of this answer.) 

Urea could theoretically form hydrogen bonds with this number of water molecules. (Note, however, that the size and shape of a molecule may limit the number of hydrogen bonds formed by one urea molecule.) 

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