A 1.95 mol sample of Xe gas is confined in a 49.8 liter container at 38.0 °C If

Question

A 1.95 mol sample of Xe gas is confined in a 49.8 liter container at 38.0 °C If the amount of gas is decreased to 0.975 mol, holding the volume and temperature constant, the pressure will decrease because: Choose all that apply O With lower average speeds, on average the molecules hit the walls of the container with less force As the average speed increases, the number of molecule-wall collisions decreases. With fewer molecules in the container, the molecules have lower average speeds. with fewer molecules per unit volume, the molecules hit the walls of the container less often. None of the Above

Explanation / Answer

With fewer molecules per unit volume, the molecules hit the walls of the container less often so the sum of collision force is also less. As, total collision force per unit area is the pressure exerted by the gas on the container wall, therefore, the pressure on the wall decreases.

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