Recall the postulates of kinetic-molecular theory. read the list and check all the statements that apply to the behavior of an ideal gas: 1. gas particles behave like hard spheres 2. gas particles travel randomly 3. gas particles are attracted to each other 4. energy is lost when gas particles collide 5. average kinetic energy of a collection of gas particles depends on the temperature 6. gas particles occupy most of the space within a container 7. gas particles have mass and volume