Question

what is the law of definite proportions or constant proportions by Joseph Proust ?​

Answer 1

Answer:

Explanation:

The Law of Constant Composition, discovered by Joseph Proust, is also known as the Law of Definite Proportions. ... The French chemist Joseph Proust stated this law the following way: "A chemical compound always contains the same elements combined together in the same proportion by mass.

Answer 2

Answer:

Proust had said, " In a chemical substance, elements are always present in definite proportion by mass."