Question

what is the law of Constant Composition ​

Answer 1

a given chemical compound always contains its component elements in fixed ratio and does not depend on its source and method of preparation.

Answer 2

hi,
In chemistry, the law of definite proportion, sometimes called Proust's law or the law of definite composition, or law of constant composition states that a given chemical compound always contains its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.