Question

What is the Law of Definite Proportions?

Answer 1

See [this site.........](https://en.wikipedia.org/wiki/Law_of_definite_proportions)

Explanation:

The `"law of definite proportions"` or the `"law of constant composition"` holds that a chemical compound always contains its component elements in a fixed ratio, regardless of the source of the compound. Joseph Proust proposed a similar `"law of constant composition."`

An example of this law is that water ALWAYS has a composition by mass of `1/8` hydrogen, and `7/8` oxygen. This law allows us to propose empirical formulae, and by extension molecular formulae, if the molecular mass is known.