Referring to the emergency response guidebook (erg), what is the united nations identification (un id) number for the chemical agent lewisite?

Answer;
 2810

Referring to the emergency response guidebook, the united nations identification (un id) number for the chemical agent lewsite is 2810.

Explanation; 
UN identification numbers , are normally four digit numbers that identify hazardous substances and articles, and also dangerous goods. These include explosives, flammable liquids, toxic substances, in the framework of international transport. 
In this case the UN id for a chemical agent called Lewisite is 2810.

Because they are stupid and insensitive

Air enters through the nose (and sometimes the mouth), moves through the nasal cavity, the  pharynx, the  larynx, enters the  trachea, moves through the  bronchi  andbronchioles  till the alveoli.