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They're not. As you can see below, the picture shows first a solid, then a liquid then a gas. The molecules start off very dense. Then the liquid is less dense then the gas is the least dense.

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13y ago
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10y ago

Since there are many different gases each one has someting special.

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Han Myo Oo Sohan

Lvl 1
1y ago
Different gases have different densities because the molecules in the gas are very far from each other so they are free to move.

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14y ago

Because density decreases with increasing temperature.

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11y ago

The same mass of a gas will occupy a very much larger volume. If the same units were used the density of gases would be a much smaller number.

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7y ago

The space between the molecules is different in each case.

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Q: Why are units used to express the densities of gasses different from those used to express the densitites of solids or liquids?
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