Author Question: The movement of gas molecules from an area of high concentration to one of lower concentration ... (Read 46 times)

joblessjake · **on:** Jul 16, 2018

The movement of gas molecules from an area of high concentration to one of lower concentration describes the property of which of the following?

a. Osmosis c. Diffusion
b. Effusion d. Suspension

Question 2

The partial pressure of oxygen when there is 25 oxygen in a gas mixture at an atmospheric pressure of 760 mm Hg is ____ mm Hg.

a. 190 c. 1900
b. 30.4 d. 159.6

fdliggud · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
Diffusion is movement of molecules from areas of high concentrations to low concentrations. Effusion refers to the seepage or loss of blood through torn blood vessels. Osmosis describes the movement of water across a semipermeable membrane from a less-concentrated to a more-concentrated area. Suspensions are mixtures of solutions with undissolved particles or mol-ecules.

Answer to Question 2

ANS: A
Partial pressure of oxygen = oxygen barometric pressure, or 0.25 760 mm Hg = 190 mm Hg.