Final answer:
Copper(I) chloride (CuCl) is the substance that will conduct electricity when dissolved in water, as it is an electrolyte that dissociates into ions, allowing for the conduction of electrical current.
Step-by-step explanation:
To determine which substance will conduct electricity when dissolved in water, we need to identify if the substance is an electrolyte or a nonelectrolyte. Electrolytes are substances that dissociate into ions when dissolved in water and can carry an electrical current. Nonelectrolytes do not dissociate into ions and do not conduct electricity when dissolved in water.
Looking at the substances listed:
- NH₃ (ammonia) is a weak electrolyte because it can form ions to a small extent when it dissolves in water.
- CuCl (Copper(I) chloride) is an ionic compound, and when it dissolves in water, it dissociates into Cu+ and Cl- ions, making it a strong electrolyte.
- CCL₄ (Carbon tetrachloride) is a covalent compound that does not dissolve well in water and does not form ions, so it is a nonelectrolyte.
- Zn (Zinc) is a metal, and in its solid state it does not dissolve in water nor conduct electricity. However, in solution as Zn2+ ions, it can conduct electricity, but solid Zn itself does not fit the criteria.
Therefore, the substance that will conduct electricity when dissolved in water is CuCl, Copper(I) chloride.