## Chemistry (4th Edition)

Remember: The law of multiple proportions states when two elements combine in more than one proportion to form two or more compounds the weights of one element that combine with a given weight of the other element are in the ratios of small whole numbers. We must solve using the given ratios of FeO and Fe2O3. $Fe_{2}O_{3}/FeO \\ 0.4297/0.2865=1.5:1=3:2$ This is a ratio of small whole numbers so the data is consistent.