Question

which postulates of Dalton's atomic theory can explain the law of definite proportion?​

Answer 1

Answer:

Law of definite proportion states that "the elements are always present in definite proportions by mass." And we know that the last postulate of Dalton's atomic theory which states that, "In a given compound, the relative number and types of atoms are constant." This postulate can explain the law of definite proportions.

Answer 2

Answer:

Any other combination of hydrogen and nitrogen would result in different chemical compounds. Thus, the postulate which explains the law of definite proportion is “The relative number and kind of atoms in a given compound remain constant”.