Is pure air homogeneous or heterogeneous?
Understand the Problem
The question is asking whether pure air is considered homogeneous or heterogeneous in its composition. A high-level approach to addressing this would involve explaining the definition of both terms and how they apply to air.
Answer
Homogeneous mixture.
Pure air is a homogeneous mixture.
Answer for screen readers
Pure air is a homogeneous mixture.
More Information
Pure air, consisting mainly of nitrogen and oxygen, also includes trace amounts of other gases. Its uniform composition throughout makes it a homogeneous mixture.
Tips
Confusing 'pure air' with air that has contaminants (particulates, pollutants) can lead to incorrectly identifying it as heterogeneous.
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