A molecule of oxygen (O2) has a speed of 473 m/s at a certain temperature. Determine the speed of the molecule in kilometers per hour (km/h).

Light waves can move through , but they travel fastest when they move through a(n) .

The arrangement of particles is most ordered in a sample of

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.