He law of constant composition says that the composition of a compound is always the same that the composition of a homogeneous mixture is always the same that the composition of an element is always the same that the composition of a heterogeneous mixture is always the same that all substances have the same composition

The law of constant composition says that the composition of a homogeneous mixture is always the same

Explanation:

The law of constant composition that is also known as Proust's Law says that when two substances react with each other, to form a compound they will always do in a constant weight ratio, that is, the ratio of the masses between two substances that form a compound, must be proportional.

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.