The reason for wafting or fanning a small amount of chemical vapors toward the nose in order to detect odors in a test tube is to protect the respiratory tract against potentially harmful vapors. a. True
b. False

Make a decision because you before you make a decision you have to know what it’s about and do reasearch

I’ve personally felt invisible all my life, especially when a friend turned out to be fake and didn’t seem to take any type of interest in what i said or any type of input i said. being invisible is a terrifying feeling to experience due to the fact you feel like no one sees you and just sees you (sorry if that doesn’t make sense). it’s like a deep emptiness that no one can fill, just you; you have to fix that emptiness by yourself and you don’t really want , or in some cases want to be invisible. i can see many invisible people when they intentionally stay away from people that can potentially hurt them in any way. also, when a person intentionally breaks off a connection so they aren’t seen by people.hope it