Answer: law of multiple proportions
Explanation:The law of multiple proportions states that if two element X and Y combine to form more than one compounds,then the several masses of X which combine with a fixed mass of Y are in simple ratio.
The law of conservative of mass states that in a chemical reaction,matter is neither created nor destroyed
The law of definite proportions states that all atoms of the same element are similar to each other and different from the atoms of other elements.
Dalton's atomic theory states that all elements are made up of tiny indivisible particles called atoms