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Is pure air a substance or a mixture?

Understand the Problem

The question is asking for the classification of pure air, specifically whether it is considered a substance or a mixture. To answer this, we will need to analyze the composition of air and the definitions of substances and mixtures.

Answer

Air is a mixture.

Air is a mixture, not a pure substance.

Answer for screen readers

Air is a mixture, not a pure substance.

More Information

Air consists mainly of nitrogen (78.09%) and oxygen (21%), along with trace amounts of other gases. Although it is homogeneous, it is not a pure substance.

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