Which of the following have the fastest diffusion rate through ...

[sjones]

Which of the following have the fastest diffusion rate through the semipermeable membrane of an oxygen concentrator? 1. Carbon dioxide 2. Water vapor 3. Nitrogen 4. Oxygen
 
  a. 1 and 2 c. 3 and 4
  b. 1 and 3 d. 2 and 4

Question 2

Bulk oxygen is produced through which of the following?
 
  a. Molecular sieves c. Semipermeable membranes
  b. Fractional distilla-tion d. Combustion of nat-ural gas

[spencer.martell]

Answer to Question 1

ANS: D
Oxygen concentrators are devices that produce enriched oxygen from atmospheric air. Thus, ox-ygen and water vapor diffuse through these membranes faster than nitrogen.

Answer to Question 2

ANS: B
Fractional distillation generates bulk oxygen. Molecular sieves and semipermeable membranes are used in oxygen concentrators. The combustion of natural gas produces carbon dioxide.

[sjones]

Thanks for the timely response, appreciate it

[debra928]

Gracias!