Question

who has proposed law of conservation of mass and who has proposed law of definite proportion?

Answer 1

Explanation:

The ancient Greeks first proposed the idea that the total amount of matter in the universe is constant. However, Antoine Lavoisier described the law of conservation of mass (or the principle of mass/matter conservation) as a fundamental principle of physics in 1789.....

The law of definite composition was proposed by Joseph Proust based on his observations on the composition of chemical compounds. Proust proposed that a compound is always composed of the same proportions of elements by mass.....

Answer 2

Answer:

The law of definite composition was proposed by Joseph Proust based on his observations on the composition of chemical compounds. Proust proposed that a compound is always composed of the same proportions of elements by mass.