The number of hydrogen bonds a molecule of CH₃CH₂NH₂ can form with water is:
Ethylamine (CH₃CH₂NH₂), a primary amine, has two N-H bonds to donate and one lone pair to accept, forming three hydrogen bonds with water, as per the PDF’s solubility discussion.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Chemical Reactions - Carbylamine Reaction and General Reactions