Question

The average distance between molecules of an ideal gas at stp is

Answer 1

You found that the average spacing of atoms/molecules in a gas at STP is about 10 particle diameters (~10 ?). you also know 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 PE graph.