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Air is a mixture of different gases but the most notible of these are Nitrogen, Oxygen and Carbon Dioxide.

All the gases in air are significantly less dense than water.

The lower density is caused by their particles having great kinetic energy and therefore moving faster and further apart.

The effect of this is to have less particles per unit area which, therefore, means that each unit area will have significantly less mass than the same unit area of water.

Things with lower density will float on top of things with higher density.

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7y ago
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12y ago

it floats that's why is on the atmoshpere

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As a pure gas carbon dioxide is heavier than air. This why it can flow into basements and valleys causing suffocation. However like all gases it diffuses into the atmosphere over time until it is distributed equally.

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7y ago

It floats. Gases are less dense than liquids. If you think about it, air bubbles rise in water.

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Q: Does air float or sink in water?
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