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Topic: Density of gas

Gases occupy enire space available to them. In that case what is the concept of density of gas? How to explain it without considering any numerical data?

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Re: Density of gas

Gases do occupy the entire volume. But they have a definite mass and hence definite density. Mass of the gas depends on number of moles of gas occupying the said volume. Pressure of the gas increases with number of moles of the gas, if its volume and temperature remain constant. Consequently, density of a gas inreases with pressure under a condition of constant volume and constant temperature.