Sure! Hereโs a breakdown of each substance you've mentioned, identifying them as either an **element**, **compound**, or **mixture**:
1. **Carbon dioxide (CO2)**: **Compound**
2. **Air**: **Mixture**
3. **Sodium (Na)**: **Element**
4. **Coffee**: **Mixture** (the composition can vary and it contains various compounds)
5. **Salt water**: **Mixture** (contains salt dissolved in water)
6. **Soda**: **Mixture** (contains carbonated water, flavorings, sugars, etc.)
7. **Hydrogen peroxide (H2O2)**: **Compound**
8. **Water (H2O)**: **Compound**
9. **Ice cream**: **Mixture** (contains various ingredients that create a homogeneous or heterogeneous mixture)
10. **Cake batter**: **Mixture** (a combination of ingredients that may not have undergone chemical changes yet)
11. **Nitrogen (N2)**: **Element**
12. **Titanium (Ti)**: **Element**
13. **Milk**: **Mixture** (contains water, fats, proteins, lactose, and other compounds)
If you have any further questions or need more clarification, feel free to ask!