A 1.0 L container at constant temperature contains 2.0 mol of He(g) and 3.0 mol of Ne(g). The total pressure of the mixture is 5.0 atm. Which of the following statements is true?
a) The mole fraction of He is 0.60.
b) The partial pressure of He is 3.0 atm.
c) The partial pressure of Ne is 3.0 atm.
d) The partial pressure of He is 2.5 atm.