It depends. You can have a gaseous mixture such as air, which would be a homogeneous mixture. But a single gas such as oxygen or methane would be a pure substance.
An aerosol may be pure or an impure material, homogeneous or not.
Yes, Argon (Ar) is an mono-atomic elementary gas, so it's PURE
Yes, hydrogen gas is a pure substance because it consists of only hydrogen atoms. It is a homogeneous mixture of identical molecules, making it a pure substance.
Ammonia is a compound, not a mixture. Household ammonia is a homogeneous mixture of ammonia and water.
Pure argon gas is a homogeneous substance.
Neither. Helium is not a mixture at all, it is a pure substance.
Neither. Helium is not a mixture at all, it is a pure substance.
Helium is an element which makes it a pure substance.
An aerosol may be pure or an impure material, homogeneous or not.
Yes, Argon (Ar) is an mono-atomic elementary gas, so it's PURE
If the sugar does not dissolve it the oil, then it is not
Yes, hydrogen gas is a pure substance because it consists of only hydrogen atoms. It is a homogeneous mixture of identical molecules, making it a pure substance.
No, chlorine gas is not a homogeneous mixture. It is a pure substance composed of chlorine molecules.
Cider vinegar is not a pure substance it is a mixture. It contains water, acetic acid and flavouring agents. As there is only one phase present ie no gas or solids it is a homogeneous mixture.
No, argon gas is a pure substance and not a heterogeneous mixture. A heterogeneous mixture contains different substances that are visibly distinguishable, whereas argon gas is composed of only argon atoms.
All the elements are homogeneous so the oxygen is homogeneous, too.
Ammonia is a compound, not a mixture. Household ammonia is a homogeneous mixture of ammonia and water.