The conversation between human and AI assistant.
Why is water considered a pure substance?
That makes sense. How does the purity of water compare to other substances?
Well, the purity of a substance is determined by how uniform its composition is. Water is considered one of the most pure substances because it is a very simple compound with a very consistent composition. Other substances, like oil or gasoline, are much more complex and have a wider range of compositions, making them less pure.