Question

Why water is considered as pure substance instead of an impure substance?

Answer 1

Answer:

Water is a pure substance because it only contains one type of molecule. Pure water contains only molecules that are a combination of one oxygen atom...

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Answer 2

Answer:

Water is considered as pure substance because it is made of only water molecules.

Explanation:

Water is a combination of oxygen and hydrogen atoms but they are still pure because they have a fixed chemical composition.