Iced tea is a mixture, not a single compound, so it doesn't have a specific chemical formula. It's made by combining:

* Water (H2O)

* Tea leaves (containing polyphenols, caffeine, tannins, etc.)

* Sugar (C12H22O11, usually sucrose) or other sweeteners

* Lemon or other flavorings (optional)

The exact proportions of these ingredients vary depending on the recipe and personal preference.