This question is based on Dalton's Law of Partial Pressure which states that "the total pressure of a system of gas is equal to the sum of the pressure of each individual gas (partial pressure).
Now, Partial Pressure of a gas = (mole fraction) × (total pressure)
⇒ Partial Pressure of Hydrogen =
× 
= 0.31 atm
Thus the Partial Pressure of Hydrogen in the container is 0.31 atm.
Now, Partial Pressure of a gas = (mole fraction) × (total pressure)
⇒ Partial Pressure of Hydrogen =
= 0.31 atm
Thus the Partial Pressure of Hydrogen in the container is 0.31 atm.