Answer :

Final answer:

The law of multiple proportions revolutionized chemistry by establishing fixed mass ratios in compounds, aligning with Dalton's atomic theory.


Explanation:

The law of multiple proportions was a significant advance in chemistry that distinguished between pure compounds and mixtures. This law, developed by Proust, asserted that elements could combine in fixed mass ratios in compounds, laying the foundation for Dalton's atomic theory of matter. By understanding the consistent ratios of elements in compounds, this law supported the atomic theory.


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