Chemistry - Mole Concept Question with Solution | TestHub

As mole,$\mathrm{n}=\frac{\mathrm{w}}{\mathrm{m}\mathrm{o}\mathrm{l}\mathrm{e}\mathrm{c}\mathrm{u}\mathrm{l}\mathrm{a}\mathrm{r}\mathrm{ w}\mathrm{t}.}$
Moles of FeO :$\mathrm{F}{\mathrm{e}}_2{\mathrm{O}}_3:\mathrm{F}{\mathrm{e}}_3{\mathrm{O}}_4$
$\frac{\mathrm{w}}{72}:\frac{\mathrm{w}}{160}:\frac{\mathrm{w}}{232}$
moles of$\mathrm{F}\mathrm{e}=\frac{\mathrm{w}}{72}:\frac{2\times \mathrm{w}}{160}:\frac{3\mathrm{ w}}{232}$
i.e., 1 : 0.9 : 0.93.