Answer:Here are 20 examples of compounds and their formulas:1. Water - H₂O2. Carbon Dioxide - CO₂3. Salt (Sodium Chloride) - NaCl4. Sugar (Glucose) - C₆H₁₂O₆5. Ammonia - NH₃6. Methane - CH₄7. Vinegar (Acetic Acid) - CH₃COOH8. Baking Soda - NaHCO₃9. Alcohol (Ethanol) - C₂H₅OH10. Hydrochloric Acid - HCl11. Sulfuric Acid - H₂SO₄12. Calcium Carbonate - CaCO₃13.Nitric Acid - HNO₃14. Magnesium Oxide - MgO15. Sodium Hydroxide - NaOH16. Potassium Chloride - KCl17. Calcium Hydroxide - Ca(OH)₂18. Sodium Sulfate - Na₂SO₄19. Calcium Chloride - CaCl₂20. Hydrogen Peroxide - H₂O₂