## Chemistry: A Molecular Approach (3rd Edition)

Ratio of mass of Oxygen per gram Osmium in the two compounds = $\frac{0.3369}{0.168}$ = $2$ The ratio of these two masses is a small whole number. The law of multiple proportions states that when two elements (call them A and B) form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers. We see that these amounts are consistent with the law of multiple proportions.