Question

general guidelines for preventing accidents include:
know where the safety equipment is
follow all safety instructions carefully
become familiar with the hazards of the chemicals to be used
all of the above
never play tricks or indulge in horseplay in the chemical laboratory
become familiar with the hazards of equipment to be used

Explanation:

All the listed items are critical guidelines for preventing accidents in a chemical laboratory setting. Knowing safety equipment locations ensures quick access during emergencies, following safety instructions minimizes avoidable risks, understanding chemical and equipment hazards prepares one to handle materials safely, and avoiding horseplay eliminates reckless behavior that causes accidents.

Answer:

All of the above