Question 30
Gas LawsThe total pressure of mixture of 80.0g of oxygen gas and 56.0g of nitrogen gas is 1.8 atm. Calculate the partial pressure of oxygen gas in the mixture [O=16, N=14]
- A.1.0 atm
- B.0.8 atm
- C.1.4 atm
- D.1.2 atm
Show the answer and explanation
Answer: A (1.0 atm)
Explanation
O2: 80/32 = 2.5 mol; N2: 56/28 = 2 mol. Mole fraction of O2 = 2.5/4.5, so p = 2.5/4.5 × 1.8 = 1.0 atm.