the pressure will decrease because?

Question

A 0.697 mol sample of O₂ gas is confined in a 16.5 liter container at 15.0 °C.

If the temperature of the gas sample is decreased to -4.60 °C, holding the volume constant, the pressure will decrease because:

Choose all that apply.

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

 With higher average speeds, the molecules hit the walls of the container more often.

 At lower temperatures molecules have lower average speeds.

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

 None of the Above

Answer 1

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

 At lower temperatures molecules have lower average speeds.