Hydrogen is none of both, not being a mixture but an ELEMENT.
Heterogeneous. It's a combination of two homogenous substances - hydrogen, and oxygen. What you're describing is hydrogen peroxide, by the way.
homogenous.
Heterogeneous
AnswerIt is heterogeneous as it is made up of many different atoms and molecules... carbon, hydrogen, oxygen as well as pollen and pollutants.Air is a homogenous mixture.
heterogeneous mixture
Heterogenous
Indeed. it is homogenous.
Homogenous
heterogeneous
heterogeneous
No, it is heterogeneous.
Homogenous