state law of constant proportion
Answers
In any given chemical compound, the elements always combine in the same proportion with each other. This is the law of constant composition
example, hydrogen and oxygen may combine in different proportions to form H 2 O 2 rather than H 2 O . In H 2 O 2 , the ratio is and the mass ratio of hydrogen to oxygen is .
The law of constant proportions states that when a compound is broken, the masses of the constituent elements remain in the same proportion. Or, in a chemical compound, the elements are always present in definite proportions by mass.
This means each compound has the same elements in the same proportions, regardless of where the compound was obtained, who prepared it, or its mass.
This law was formulated and proven by Joseph Louis Proust in 1799.