Matchbox are not pure substances.
phosphorus.
pure substance, propanone
it is a pure substance.... not
Pure substance
Methane is a pure substance.
About the size of a Tennis court
pure substance
pure substance
Pure Substance
A pure substance is classified by having a definite and constant composition. The substance can be either an element or a compound, but what makes the substance pure, is that it does not vary.
Neon is a pure substance. Elements and compounds are pure substances; mixtures are not.
CH3COOH is a pure substance. It is the chemical formula for acetic acid.