What is the chemical formula of skim milk?

There is no specific chemical formula for skim milk, as it is a complex mixture of various components. However, here are some of the key components and their approximate percentages in skim milk:

Water: ~91%

Protein: ~3.5% (primarily casein and whey proteins)

Carbohydrate: ~4.9% (mainly lactose)

Fat: ~0.1%

Minerals: ~0.8% (including calcium, phosphorus, potassium, and magnesium)

In addition to these main components, skim milk may also contain trace amounts of vitamins, enzymes, and other compounds. The composition of skim milk can vary slightly depending on factors such as the breed of cow, diet, and processing conditions.