Question: what are the three main components of urine?
Answer: Urea 9.3 g/L.
Chloride 1.87 g/L.
Sodium 1.17 g/L.
Potassium 0.750 g/L.
Creatinine 0.670 g/L.
Other dissolved ions, inorganic and organic compounds (proteins, hormones, metabolites).