The composition of a sample of wurtzite is \( \mathrm{Fe}_{0.93} \mathrm{O}_{1.00} \). Which of ...

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The composition of a sample of wurtzite is \( \mathrm{Fe}_{0.93} \mathrm{O}_{1.00} \). Which of the following statements are correct related to this compound?
(a) The percentage of \( \mathrm{Fe} \) (III) by mass is \( 15.05 \% \)
(b) The ratio of \( \mathrm{Fe} \) (III) to \( \mathrm{Fe} \) (II) ion is 0.17
(c) The percentage of \( \mathrm{Fe} \) (II) ion \( 11.5 \% \)
(d) The amount of \( \mathrm{Fe}^{3+} \) is \( 8.4 \mathrm{~g} \) in \( 1.0 \mathrm{~g} \) of wurtzite
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