Final answer:
The Law of Multiple Proportions states that the ratios of the masses of the second element which combine with a fixed mass of the first element will always be ratios of small whole numbers.
Step-by-step explanation:
The Law of Multiple Proportions states that if two elements form more than one compound between them, then the ratios of the masses of the second element which combine with a fixed mass of the first element will always be ratios of small whole numbers.
Nitrogen forms a very large number of oxides, five of which are N₂O, N₂O₂, N₂O₃, N₂O₄, and N₂O₅. The ratios of the masses of oxygen that combine with a fixed mass of nitrogen in these compounds are small whole numbers.