The empirical formula of zinc chloride is ZnCl2.
To explain further, the empirical formula represents the simplest whole-number ratio of the elements present in a compound. In the case of zinc chloride, each formula unit contains one zinc (Zn) atom and two chlorine (Cl) atoms. Therefore, when we simplify this ratio, we arrive at ZnCl2, indicating that for every one zinc atom, there are two chlorine atoms in the compound.