Mark each of these as a physical or chemical change, or both.
1. Heat powdered iron + sulfur mixture
2. Magnesium ribbon in fire
3. Magnesium ribbon in HCI acid
4. Baking soda + HCI acid
5. Silver nitrate + Ammonium chloride
6. Potassium dichromate + Hydrogen peroxide
7. Sucrose (table sugar) heated
8. Burning candle
9. Sucrose in water