Question

use the references to access important values if needed for this question.
a 1.64 mol sample of co₂ gas is confined in a 38.2 liter container at 11.0 °c.
if the amount of gas is increased to 2.46 mol, holding the volume and temperature constant, the pressure will increase because
(select all that apply.)
owith higher average speeds, on average the molecules hit the walls of the container with more force.
owith more molecules per unit volume, the molecules hit the walls of the container more often.
oas the average speed increases, the number of molecule-wall collisions decreases.
owith more molecules in the container, the molecules have higher average speeds.
onone of the above
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Explanation:

Step1: Analyze the effect of molecular speed on collision force

According to the kinetic - molecular theory of gases, when the average speed of gas molecules increases (temperature is constant here, but amount of gas is increased which can be related to kinetic energy in terms of molecular motion in a different context of gas laws application here), the force of each molecular collision with the container wall increases.

Step2: Analyze the effect of number of molecules on collision frequency

When the amount of gas (number of moles) is increased, the number of gas molecules per unit volume increases. So, the frequency of molecular collisions with the container walls increases.

Answer:

With higher average speeds, on average the molecules hit the walls of the container with more force. With more molecules per unit volume, the molecules hit the walls of the container more often.