Question: water is H2O, so what is milk? does it have a compound thing like water and other substances?

Dawn Lau answered on 18 Jun 2016:

Milk is a mixture of different compounds, including water, fat, and lots of different proteins. Each of these components has their own chemical formula, so putting together a chemical formula for milk would be extremely complex. In fact, the amount of proteins differs between different types and batches of milk. Here is a description of the chemical composition of milk: https://en.wikipedia.org/wiki/Milk#Physical_and_chemical_properties_of_milk