I think you might have meant: "Tear gas" (lachrimatory agent).
This is a group of agents, some of which are more generally known and used as 'Riot control agents', like pepper spray.
Cf. Added Related links (at the left bottom of this answer page).
One chemical formula:
Nonivamide, also called pelargonic acid vanillylamide or PAVA,
C17H27NO3,
IUPAC name: N-[(4-hydroxy-3-methoxyphenyl)methyl]nonanamide.
(It naturally occurs in chili peppers and is used as 'spicing' food additive)
Another chemical formula:
CS-gas, which is basically also considered as an 'Army NBC'-weapon.
2-chlorobenzalmalononitrile (also called o-Chlorobenzylidene Malononitrile)
chemical formula: C10H5ClN2
The chemical formula is NH3
There is no such thing as fluoride gas.Fluorine gas is F2
The chemical formula for hydrogen chloride gas, also known as hydrochloric acid gas, is HCl.
There is no known gas with the chemical formula C12.
The chemical formula for natural gas is CH4, which represents one carbon atom bonded to four hydrogen atoms.
The chemical formula is NH3
The chemical formula for Hydrogen gas is H2
There is no such thing as fluoride gas.Fluorine gas is F2
The chemical formula for Hydrogen gas is H2
The chemical formula for hydrogen chloride gas, also known as hydrochloric acid gas, is HCl.
The chemical formula for helium is He. It is a noble gas with an atomic number of 2.
Formula: CH4
Formula: N2
Formula: PCl3
There is no known gas with the chemical formula C12.
Assuming that you mean Hydrogen, its formula is H2, hydrogen is diatomic molecule
The chemical formula of ammonia gas is NH3.