Which of the following are characteristics of reverse-phase chromatography? i the stationary phase is polar. ii the mobile phase is more polar than the stationary phase. iii less polar mobile phase has a lower eluent strength. iv more polar mobile phase has a higher eluent strength. v the stationary phase is nonpolar.

Asubstance is held in an open container. its particles move past one another at random speeds but do not leave the container. heat is removed from the system, and the particles slow down. when enough heat is removed, the particles no longer have enough speed to overcome the weak attractive forces between them. when this happens, the substance enters its solid state. the process described above is known as .