Is ammonia a pure substance or a mixture?


Quick Answer

According to the Encyclopedia Britannica, ammonia is a pure substance because it is a compound of the elements nitrogen and hydrogen. The two elements are joined chemically, so it cannot be considered a mixture.

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Full Answer

In a mixture, the substances that are combined together keep their own chemical identities. For example, salt and sugar can be put together in a mixture, but the chemical properties of the substances will not change, and they could be separated back into salt and sugar.

Ammonia, which is a colorless gas made up of one nitrogen and three hydrogen atoms (NH3), is the simplest stable compound that can be made from these two elements.

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