Chemistry - Mole Concept Question with Solution | TestHub

$\begin{array}{ccccc}\text{Element}& \begin{array}{c}\text{Mass}\\ \text{percentage}\%\end{array}& \begin{array}{c}\text{No. of}\\ \text{moles}\end{array}& \begin{array}{c}\text{No. of moles}/\\ \text{Smallest number}\end{array}& \begin{array}{c}\text{Simplest whole}\\ \text{number}\end{array}\\ A& 32\%& \frac{32}{64}=\frac{1}{2}& \frac{1}{2}\times 2& =1\\ B& 20\%& \frac{20}{40}=\frac{1}{2}& \frac{1}{2}\times 2& =1\\ C& 48\%& \frac{48}{32}=\frac{3}{2}& \frac{3}{2}\times 2& =3\end{array}$ So, empirical formula of $X=\begin{array}{clll}A& :& B& \text{ C }\\ 1& :& 1& :\end{array}$ $\therefore$ The correct empirical formula of compound X is ${\mathrm{ABC}}_3$