Gas
An acid for example.
An acid for example.
An acid.
It is not a mixture at all. H2O2 is a (pure) compound
These compounds are acids.
There is little evidence of such a compound.
Hydrogen flouride is a compound.
Acids increase the hydrogen ion concentration in a solution.
It is a compound.
H2S is known as hydrogen sulfide.
Hydrogen bromide (HBr) is a compound.
H2O; composed of 2 hydrogen and 1 oxygen