Foods are not pure substances.
A pure substance is the same throughout. When a substance is 100% something it is pure.
silicon is a pure substance because it is an element and as we know an element is a pure substance
Air is not a pure substance.
pure substance
It is a pure substance as well as a compound
Examples of pure substance: gold, silver, carbon dioxide, hydrogen
Pure substance can be identified as either elements or compounds. Some examples of pure substance that are elements are sulfur and tin. Pure substances that are compounds are sugar and salt.
Any food substance is probably ahomogeneous. Except pure liquids. There are endless examples if you think about it.
Water
its a mixture
It is a mixture.
Salt. Carbon, if you have a carbon filter for your fish tank.
Water is a compound. A pure metal is an element. Graphite (a pencil lead) is the element carbon. These are all examples of a pure substance.
Salt. Carbon, if you have a carbon filter for your fish tank.
pure substance, propanone
Pure substance
it is a pure substance.... not