Many processes such as the fabrication of integrated circuits are carried out in a vacuum chamber to avoid reaction of the material with oxygen in the atmosphere. it is difficult to routinely lower the pressure in a vacuum chamber below 1.0*10^-10 torr. a)calculate the molar density at this pressure at 310. bwhat fraction of the gas phase molecules initially present for 1.0 in the chamber are present at ?

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Asolid that forms and separates from a liquid mixture is called

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.