Problem: The two compounds, Fe3O4 and Fe2O3, illustrate the law of multiple proportions. For the same mass of iron in samples of each compound, what is the ratio of the masses of the oxygen in the compounds? A. 1 to 1 B. 2 to 3 C. 3 to 4 D. 7 to 8 E. 8 to 9

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The two compounds, Fe3O4 and Fe2O3, illustrate the law of multiple proportions. For the same mass of iron in samples of each compound, what is the ratio of the masses of the oxygen in the compounds?

A. 1 to 1

B. 2 to 3

C. 3 to 4

D. 7 to 8

E. 8 to 9