Final answer:
Milk and tea do not have a specific chemical formula like water because they are complex mixtures of various substances.
Step-by-step explanation:
A chemical formula is an expression that shows each of the elements in a compound and the relative proportions of those elements. Water is composed of hydrogen and oxygen in a 2:1 ratio and its chemical formula is H₂O. However, milk and tea are not simple chemical compounds like water. They are complex mixtures of various substances, including water, proteins, carbohydrates, fats, and other compounds. Therefore, milk and tea do not have a specific chemical formula like water.