A 1.85 mol sample of Xe gas is confined in a 46.3 liter container at 31.9 °C. If

Question

A 1.85 mol sample of Xe gas is confined in a 46.3 liter container at 31.9 °C.

If the amount of gas is decreased to 0.925 mol, holding the volume and temperature constant, the pressure will decrease because:

Choose all that apply.

With fewer molecules per unit volume, the molecules hit the walls of the container less often.

As the number of molecule-wall collisions increases, the force per collision decreases.

With lower average speeds, on average the molecules hit the walls of the container with less force.

With fewer molecules in the container, the molecules have lower average speeds.

None of the Above

Explanation / Answer

We are decreasing amount of gas

SO , number density of molecule will decrease

So, the number of molecule hitting a particular area of wall will decrease

force due to molecules hitting the wall is pressure

Since number of molecules hitting the wall decreases, the pressure will decrease

Answer:

With fewer molecules per unit volume, the molecules hit the walls of the container less often

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