In the diagram below,nitrogen molecules are represented by unshaded spheres,oxygen molecules by gray spheres,and chlorine molecules by black spheres.
-If the total pressure in the container is 400.mm Hg,what is the partial pressure of nitrogen?
A)40.0 mm Hg
B)80.0 mm Hg
C)120.mm Hg
D)200.mm Hg

Question

In the diagram below,nitrogen molecules are represented by unshaded spheres,oxygen molecules by gray spheres,and chlorine molecules by black spheres. 
-If the total pressure in the container is 400.mm Hg,what is the partial pressure of nitrogen?
A)40.0 mm Hg 
B)80.0 mm Hg 
C)120.mm Hg 
D)200.mm Hg

Quizplus · Accepted Answer

Out of the three types of molecules in the container, nitrogen molecules are represented by unshaded spheres. We can count a total of 8 unshaded spheres in the diagram, which represents 8 nitrogen molecules. The partial pressure of nitrogen can be calculated by multiplying the mole fraction of nitrogen (number of moles of nitrogen/total number of moles) by the total pressure of the container. Since there are 8 nitrogen molecules out of a total of 24 molecules (8+10+6), the mole fraction of nitrogen is 8/24 = 1/3. Therefore, the partial pressure of nitrogen is (1/3) x 400.mm Hg = 80.0 mm Hg.

In the Diagram Below,nitrogen Molecules Are Represented by Unshaded Spheres,oxygen