Answer:
Partial pressure He = 0.239 atm
Partial pressure Ne = 0.409 atm
Partial pressure Ar = 0.152 atm
Step-by-step explanation:
Step 1: Data given
Total pressure = 0.80 atm
Number of moles He = 0.55 moles
Number of moles Ne = 0.94 moles
Number of moles Ar = 0.35 moles
Step 2: Calculate total moles
Total moles = Moles He + moles Ne + moles Ar
Total moles = 0.55 + 0.94 + 0.35
Total moles = 1.84 moles
Step 3: Calculate mol fractions
Mol fraction He = 0.55 / 1.84 = 0.299
Mol fraction Ne = 0.94 / 1.84 = 0.511
Mol fraction Ar = 0.35 / 1.84 = 0.190
Step 4: Calculate partial pressure
Partial pressure He = 0.80 atm * 0.299 = 0.239 atm
Partial pressure Ne = 0.80 atm * 0.511 = 0.409 atm
Partial pressure Ar = 0.80 atm * 0.190 = 0.152 atm