Answer:
The mole fraction of SF6 = 0.505
Explanation:
Step 1: Data given
A gas mixture has partial pressure of:
120 torr N2
350 torr Ar
480 torr SF6
Step 2: Calculate the total pressure
Total pressure = P(N2) + P(Ar) + P(SF6)
Total pressure = 120 + 350 + 480 = 950 torr
Step 3: Calculate the mole fraction
Mole fraction = Partial pressure / total pressure
Mole fraction SF6 = 480 torr / 950 torr
Mole fraction SF6 = 0.505
The mole fraction of SF6 = 0.505
