Question

How do we know that air is a mixture??​

Answer 1

Answer:

Air is a mixture and not a compound because: Air does not have a formula like a mixture, while compounds have a fixed formula. When air is formed by gases, there is no energy change. Properties of air are variable and subjective to time and place.

Explanation:

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Answer 2

Explanation:

The components of mixture can be easily separated and they retain their properties.

The components of air are: oxygen, nitrogen, water vapour and carbon-dioxide, all these gases can be easily separated and they retain their properties.