Asample of an ideal gas is cooled from 50.0 degrees celsius to 25.0 degrees celsius in a scaled container of constant volume. which of the following values for the gas will decrease? 1. the average molecular mass of gas. 2.the average distance between the molecules. 3. the average speed of molecules.

The ideal gas law is PV=nRT where P is pressure, V is volume, n is number of moles of gas, R is the Ideal Gas constant, and T is temperature. In your question, T is decreased by one half. The volume and number of moles of gas are constant, so we are determining the relationship between pressure and temperature. Both temperature and pressure is directly related, meaning lowering the temperature will lower the pressure. And pressure is defined as the frequency at which gas molecules collide with the container. Based on this relationship if temperature is decreased to half, the pressure will be decreased to half, so the answer is 3.

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