3. A sample of gas contains 3 moles of argon and 5 moles of krypton. If the argon exerts a pressure of

210 torr, what is the pressure of the krypton? What is the total pressure?

Answer:pressure of the krypton = 350torr, Total pressure = 560torr

Explanation:

Note:The partial pressure of an individual gas = to the total pressure multiplied by the mole fraction of that gas.

Given

Argon=3moles

pressure for Argon = PAr = 210 torr

Krpton = 5, Kr pressure = ?

a) PArgon = mole fraction of Argon x total pressure

3/3+5 x total pressure = 210

total pressure = 210x 8/3

Total pressure = 560torr

b) pressure for Krypton = Krypton mole fraction x total pressure

5/8 X 560

= 350torr

pressure of the krypton = 350torr