Which one of the following compounds contains an ion with a 3+ charge?

It seems you've referred to "the following compounds," but I don't see a list of options provided. To help you identify which compound contains an ion with a **3+ charge**, I can provide some common examples: 1. **Aluminum Chloride (AlCl₃):** Contains the aluminum ion (**Al³⁺**). 2. **Iron(III) Oxide (Fe₂O₃):** Contains the iron(III) ion (**Fe³⁺**). 3. **Chromium(III) Sulfate (Cr₂(SO₄)₃):** Contains the chromium(III) ion (**Cr³⁺**). 4. **Ammonium Chloride (NH₄Cl):** Contains the ammonium ion (**NH₄⁺**), which has a **1+** charge, not 3+. If you provide the specific compounds you're considering, I can give a more precise answer. However, based on common chemistry knowledge, compounds like **AlCl₃**, **Fe₂O₃**, and **Cr₂(SO₄)₃** contain ions with a **3+** charge.