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Problem 47

A 0.370 -mol sample of a metal oxide $\left(\mathrm{M}_{2} \mathrm{O}_{3}\right)$ weighs 55.4 $\mathrm{g}$ .
(a) How many moles of $\mathrm{O}$ are in the sample?
(b) How many grams of $\mathrm{M}$ are in the sample?
(c) What element is represented by the symbol M?

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Chapter 3
Stoichiometry of Formulas and Equations
CHEMISTRY: The Molecular Nature of Matter and Change 2016

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