Amixture of h2 and water vapor is present in a closed vessel at 20°c. the total pressure of the system is 755.0 mmhg.
partial pressure of water vapor at 20°c equals 17.5 mmhg.
what is the partial pressure of h2?

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 .