Question

hi! im trying to figure out a mystery chemical compound, any guesses on what it could be are appreciated! heres its hints:

hint 1: the formation of me through a combustion reaction of my individual elements is an exothermic reaction

hint 2: in my natural phase at room temperature i am a colorless gas that greatly fumes upon contact with water

hint 2: i have many industrial uses, but one of my greatest applications is in the human body, where I an found in the stomach

Answer 1

Mystery chemical compound is HCl(g).

HCl(g) on contact with water in air form fumes.

And the formation of this is a exothermic reaction. As the reactant for this are Hydrogen gas (H₂) and Chlorine gas (Cl₂) and gives exothermic reaction on combustion and Hydrogen is a flammable gas and combust quite vigrously.