Question

Which choice is an empirical formula for an ionic compound?

• A. $H_{2}O$
• B. ${Fe}_2{O}_3$
• C. $N_2{O}_4$
• D. ${Na}_2{Cl}_2$

Answer 1

The correct option is B ${Fe}_2{O}_3$

Given, the compound is ionic.

So, $H_{2}O,N_2{O}_4$ are not correct.

While ratio of sodium to chlorine in $N{a}_{2}C{l}_2=2:2\Rightarrow$ Not simplest $\Rightarrow$ Not Empirical

So, $F{e}_2{O}_3$ is empirical formula of an ionic compound.