1. Dry air is a mixture 🧪. TRUE FALSE
2. Dry air only contains dioxygen (O2) 🫧. TRUE FALSE
3. Air mainly contains carbon dioxide (CO2) 🌫️. TRUE FALSE
4. There is as much dioxygen (O2) 🫧 as dinitrogen (N2) in dry air. TRUE FALSE
5. Air contains about 80 % dinitrogen (N2) and 20 % dioxygen (O2). TRUE FALSE
6. To prepare 10 L of air, you need 2 L dinitrogen (N2) and 8 L dioxygen (O2). TRUE FALSE
7. In the presence of carbon dioxide (CO2), limewater 🧪 becomes cloudy. TRUE FALSE
Next exercise 🔀