1) In the Activity 3.2, which you just completed, you found that the average spacing of atoms/molecule in a gas at STP is about 10 particle diameters (~10cr ). You also know from chemistry that the molecules of an ideal gas do not interact. Relate these two ideas-the average distance between gas molecules at STP, and the non-interaction between molecules of an ideal gas to the particle-particle interaction model as represented by the PEu graph.