Which of the following statements is true for ideal gases, but is not always true for real gases? Choose all that apply. O Collisions between molecules are elastic. O Pressure is caused by molecule-wall collisions. O Molecules are in constant random motion. The volume occupied by the molecules is negligible compared to the volume of the container.

Match the characteristic of gases described below to the postulates of the kinetic molecular theory that best explain that characteristic. (Note: You may need to list more than one postulate.) The pressure of a gas in a fixed volume increases when its temperature increases. Select one or more: The average kinetic energies of gas particles increase with an increase in temperature. Gas particles are widely spaced. A gas consists of many small particles in rapid, random motion. The total volume of the molecules themselves is very small compared to the volume of the container. There are virtually no attractive forces between gas particles.

Consider the lungs, which can be modeled on a very basic level as a 5.0 L container of a mixture of N2 and O2 gases at 298 K. a) Calculate the pressure inside your lungs if filled with 0.15 mol the gas mixture described above, assuming it behaves ideally. b) Is it reasonable to assume that this gas mixture behaves ideally under these conditions? Why or why not?