Final answer:
The correct chemical formula among the provided options is E) ZnCl2, which represents zinc chloride. This compound has a balanced ionic charge with one zinc ion and two chloride ions.
Step-by-step explanation:
The correct formula among the given options is E) ZnCl2. This chemical formula represents zinc chloride, a compound formed when zinc (Zn) reacts with chlorine (Cl) to form a neutral compound. Zinc has a valency of +2, and chlorine has a valency of -1, so the correct formula requires two chloride ions to balance the charge of one zinc ion, resulting in ZnCl2. The other given options are incorrectly formulated in terms of the charges on the ions or the stoichiometry of the compounds.