Answered

When researchers cool a gas, which of the following has occurred? Select all that apply.

Velocity and spacing of particles is reduced

Volume of substance decreases relative to temperature decrease

Cooling stops once absolute zero (-273K) is reached

Mass of the gas is reduced linearly as pressure decreases

Answer :

taskmasters
I think that there would be two correct answers from the choices listed above. When researchers cool a gas, velocity and spacing of particles is reduced and the volume of substance decreases relative to temperature decrease. Hope this answers the question. Have a nice day.
Dejanras

Answer is: Velocity and spacing of particles is reduced and Volume of substance decreases relative to temperature decrease.

Charles' Law (The Temperature-Volume Law) - the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature:

V₁/T₁ = V₂/T₂.

When temperature goes down, the volume also goes down.

Velocity is equivalent to a specification of its speed and direction of motion, it is a physical vector quantity. Less enegry (lower temperature), lower the velocity.

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