At constant pressure and volume, the density of a gas as the molar mass increases. A gas made of heavier particles will have a density than a gas composed of lighter particles under the same conditions of temperature and pressure.

Increases, higher

Explanation:

Remember that the formula for Density is D=mass/volume.

If volume remains the same, as mass increases the density will also increase as the numerator of this math problem increases while the denominator remains the same.

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