The density of a gas can vary since gases are compressible.
Indeed, we can "crush" a gas so that it fits into a smaller space. Consequently, there could be a greater quantity of gas, and therefore, a greater mass of gas in a certain space.
Feel free to ask us more questions if you have any!
Explanation from Alloprof
This Explanation was submitted by a member of the Alloprof team.
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The density of a gas can vary since gases are compressible.
Indeed, we can "crush" a gas so that it fits into a smaller space. Consequently, there could be a greater quantity of gas, and therefore, a greater mass of gas in a certain space.
Feel free to ask us more questions if you have any!