The Diffusion Rate of H₂ in a Lecture Hall Was

question 82

Multiple Choice

The diffusion rate of H₂ in a lecture hall was found to be 25.0 m/sec at 25°C. How long will it take poisonous HCN gas to diffuse 10 m in the same room?

• A)1.5 s
• B)0.11 s
• C)5.4 s
• D)0.19 s
• E)2.7 s

---

Definitions:

Physical Dependence

A physiological state where the body adapts to a substance, leading to withdrawal symptoms when that substance is reduced or stopped.

Withdrawal Symptoms

The unpleasant physical or psychological reactions that occur after ceasing or reducing intake of a substance that the body has become dependent on.

Hallucinogen Persisting Perception Disorder (HPPD)

A condition characterized by the re-experiencing of perceptual distortions or hallucinations previously encountered during hallucinogen use.

LSD

A powerful psychedelic drug known for altering perception, mood, and a variety of cognitive processes.