Final answer:
The employees have the right to know about the hazardous chemicals they work with through the Material Safety Data Sheet (MSDS).
Step-by-step explanation:
The employees working with hazardous chemicals have the "Right to Know" about the chemicals they are working with through the creation of the Material Safety Data Sheet (MSDS). The MSDS contains important information about the chemical, including its potential hazards, proper handling and storage procedures, and emergency response measures. It also provides detailed information on the physical and chemical properties of the substance, as well as any necessary precautions to be taken when working with it.