A pure substance will melt over a very narrowtemperature range.
An impure substance will melt over a broader, lower temperature range.
Chromatography is one way.
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Only by chemical analysis.
pure substance, propanone
Methane is a pure substance.
it is a pure substance.... not
Pure substance
A pure substance is a substance that is constant throughout. Such as water, tin or sulfur.
pure substance
pure substance
Pure Substance