Which of the following statements are true? check all that apply. view available hint(s) check all that apply. the average kinetic energy of gas molecules decreases with decreasing temperature. the kinetic energy of a molecule cannot determine its speed. the average speed of gas molecules decreases with decreasing temperature. there are gas molecules that move slower than the average. all the gas molecules in a sample cannot have the same kinetic energy. part b what are each of the following observations an example of? drag the appropriate items to their respective bins. view available hint(s) diffusion effusion part c which statements about a sample of gas containing molecules of different masses are true? check all that apply. view available hint(s) check all that apply. the rms speed depends only on temperature, and so all types of particles in the sample have the same rms speed. more-massive gas molecules in the sample have lower rms speed than less-massive ones. more-massive gas molecules in the sample have higher rms speed than less-massive ones. provide feedback