Question by  deb74 (164)

What is an example of a pure substance?

This is a question on my homework.


Answer by  shilquen (88)

A pure substance must have no additives or content that is not that substance, so for example water could be pure but will most often have additional mineral or other content. If you distilled water and filter it to purify it making it only H2O, then you would have just water - a pure substance with no additives.


Answer by  HilaryC (1382)

If its for chemistry it means its all of one element. For example, helium in a balloon is a pure substance. Oxygen is a pure substance and so is Ozone (O3). H20 isn't because it includes two different elements. Ozone would probably be a perfect example though if it is for a chemistry/science class.


Answer by  sonicfoundation (2597)

A pure substance is a substance that cannot be broken down into another type of substance by chemical or physical means.


Answer by  Amber40 (24961)

To be pure a substance it can only contain one element. For example if you where to have an isolated amount only carbon particles it would be pure.

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