The circle at right represents a portion of a mixture of four gases: gas a (purple), gas b (brown), gas c (green), and gas d2 (orange). (a) which gas has the highest partial pressure? gas a has the highest partial pressure gas b has the highest partial pressure gas c has the highest partial pressure gas d2 has the highest partial pressure (b) which gas has the lowest partial pressure? gas a has the lowest partial pressure gas b has the lowest partial pressure gas c has the lowest partial pressure gas d2 has the lowest partial pressure (c) if the total pressure is 0.931 atm, what is the partial pressure of d2? atm

(a) gas c has the highest partial pressure

(b) gas b has the lowest partial pressure

(c) 0.233 atm

Explanation:

In the given figure, the number of atoms of each gas is:

gas a = 4

gas b = 3

gas c = 5

gas = 4

Using the total gas pressure of 0.931 atm and the partial pressure of each gas is directly proportional to its mole fraction. Therefore,

Partial pressure of gas a = 4/(4+3+5+4) * 0.931 = 0.233 atm

Partial pressure of gas b = 3/(4+3+5+4) * 0.931 = 0.175 atm

Partial pressure of gas c = 5/(4+3+5+4) * 0.931 = 0.291 atm

Partial pressure of gas = 4/(4+3+5+4) * 0.931 = 0.233 atm

(a) gas c has the highest partial pressure

(b) gas b has the lowest partial pressure

(c) 0.233 atm