In case of a fire erupting in the laboratory, here are the appropriate actions to take:
1. Notify your chemistry professor immediately. They are trained to handle such situations and can provide guidance on the necessary steps to take.
2. Smother the fire with a solid material such as a fire blanket, sand, or a fire extinguisher if available. This helps cut off the oxygen supply to the fire and extinguish it.
3. Do not throw water on the fire if it involves chemicals, as certain chemicals can react violently with water and cause the fire to spread. It's crucial to know the nature of the fire before deciding to use water.
4. Opening windows may help in providing ventilation and clearing smoke from the area, but it should not be the first priority. Safety measures like notifying the professor and attempting to smother the fire should take precedence.
Remember, safety is the top priority in such situations. Following these steps can help minimize the risks associated with a fire in the laboratory and ensure the well-being of everyone present.