Respuesta :
Answer:
True
Explanation:
We never know what has touched the substance and in the lab, all materials should be treated with a certain degree of saftey.
Plus it is never hurts to be too safe.
Answer: True, all chemicals should be treated as if you don’t know what they are.
Explanation:
All chemicals should be treated as if you do not know what they are. In this way you can protect yourself and others from potential hazards, as chemicals can be mixed up or confused.