Question

which postulate 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 in a given compound means same number of atoms in a given compound.

Answer 2

the relative number of kind of atom are constant in given compound.
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