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# A sample of wustite $Fe_xO$ contains one Fe(III) for every three Fe(II).Calculate the value of $x$

$\begin{array}{1 1}(9/8)mol\\(5/4)mol\\(3/4)mol\\(6/5)mol\end{array}$

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A)
Let $x$ be the amount of oxygen atoms,we have
$\large\frac{9}{4}$ mol=$2x$
$x=(9/8)$ mol
Hence the composition of the composition is $FeO_{9/8}$ or $Fe_8O_9$