A 198 mol sample of Ar gas is confined in a s02 liter contai

A 198 mol sample of Ar gas is confined in a s0.2 liter container at 36.1 °C If the amount of gas is decreased to 0.990 mol, holding the volume and temperature constant, the pressure will decrease becaue Choose all that apply 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. 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. None of the Above

Solution

as with fewer number of molecules per unit volume , the molecules hit the walls of container less often , and hence there is a decrease in pressure . (according to kinetic theory of gases ) the reason for the pressure is the collision of gas molecules with the walls of container with decrease in number of molecules pressure decreases at a given condition