Question

14 gram of hydrogen and 12 gram of helium gas are present in a closed container if partial pressure of helium gas is 1.5 ATM then the total pressure of the gas in the container is
1) 4.5 atm
2)4.0 atm
3)6.5atm
4)5atm​

Answer 1

Answer:

Explanation:5 atm

Answer 2

Answer: Total Pressure = 5 atm

Explanation:

No. of moles of hydrogen gas = 14/2 = 7 moles

No. of moles of helium gas  = 12/4 = 3 moles

Mole fraction of Helium gas = 3 / (3 + 7) = 3/10

Mole fraction of Helium * Total pressure(P) = Partial pressure of helium

(3/10)* P = 1.5

P = 15/3 = 5 atm