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# A mixture containing only Al$_2$O$_3$ (FM 101.96) and Fe$_2$O$_3$ (FM 159.69) weighs 2.019 g. When heated under a stream of H2, Al2O3 is unchanged, but Fe$_2$O$_3$ is converted into metallic Fe plus H$_2$O(g). If the residue weighs 1.774 g, what is the weight percent of Fe$_2$O$_3$ in the original mixture?

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In this task we have a mixture containing only Al$_{2}$O$_{3}$ and Fe$_{2}$O$_{3}$ which weighs 2.019 g. Fe$_{2}$O$_{3}$ is converted into metallic Fe + H2O$_{(g)}$, when heated under a stream of H$_{2}$. Here we will calculate the weight percent of Fe$_{2}$O$_{3}$ in the original mixture if the residue weighs 1.774 g.

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