\documentclass{webquiz} \usepackage[version=4]{mhchem} \Department{Chemistry} \UnitCode{Chem101}\UnitURL{/chem101} \title{Display as image example} \begin{document} \DisplayAsImage[style="vertical-align: middle;"]{ce} \begin{question} What is \ce{(NH4)2S}? \begin{choice}[columns=1] \correct Ammonium sulfide \incorrect Ammonium hydrosulfide \feedback This is \ce{(NH4)HS} \end{choice} \end{question} \end{document}