Mixture, because it is mixed with all sorts of chemicals, such as smog, and or pollen.
Mixture is NOT a pure substance, because to be a pure substance, it can't be mixed with anything.
Oxygen is a pure element. The gas form (O2) is also pure because it only contains one element even though it is two atoms.
pure substance
Oxygen is an element (pure), O2, NOT a mixture, even not a compound.
Oxygen is a pure substance. In nature, free oxygen exists as a molecule of two oxygen atoms covalently bonded, O2.
Household hydrogen peroxide is a homogeneous mixture of hydrogen peroxide and water.
Oxygen is a pure substance.
Pure substance.
Oxygen is an element.
Hydrogen peroxide is a pure substance.
pure substance, propanone
Mixture. An alloy is a mixture of metals.
Air is a mixture.
Homogeneous mixture
mechanical mixture
Hydrogen peroxide is not a mixture at all. It is a pure substance.
H2O2 is a covalent compound, as a pure sample of it cannot be split into other separate compounds by physical means. However, the bottle labeled "Hydrogen Peroxide" in your medicine cabinet is actually a mixture (it's about a 3% solution of hydrogen peroxide the compound in water).
Pure Substance
It is not a mixture at all. H2O2 is a (pure) compound
No. Hydrogen is a pure substance.
Hydrogen is not a mixture at all. It is an element and therefore a pure substance.
It is an element so pure substance...Roll Tide
Hydrogen peroxide is a compound, but it is too unstable to exist in pure form undermost conditions. Therefore, when encountered in a laboratory or during medical treatment, hydrogen peroxide is almost always a mixture with water.
No. Hydrogen gas is an element, making it a pure substance.
Pure hydrogen peroxide has a pH of 6.2
H2O2 is a covalent compound, as a pure sample of it cannot be split into other separate compounds by physical means. However, the bottle labeled "Hydrogen Peroxide" in your medicine cabinet is actually a mixture (it's about a 3% solution of hydrogen peroxide the compound in water). I hope i could help out :)
pure substance?