What is the name of the first American self-contained breathing apparatus?

If a solution is held at a constant temperature of 25°C, at what pH would it be considered neutral?

A) 1 B) 6 C) 7 D) 10

Cleaning fluid, glue, and model cement are common examples of which of the following?

A) Volatile chemicals B) Aromatic spirits C) Hallucinogens D) Narcotics