Which of the following is true of a solid? A. The particles of a solid vibrate around a fixed point. B. The particles of a solid "flow" around each other within a fixed volume. C. The particles of a solid move about freely, expanding to fit the volume of the space they are within.

Equal numbers of moles of he(g), ar(g), and ne(g) are placed in a glass vessel at room temperature. if the vessel has a pinhole-sized leak, which of the following will be true regarding the relative values of the partial pressures of the gases remaining in the vessel after some of the gas mixture has effused?