Answer:
Partial pressure O₂ = 1.78 atm
Explanation:
We can apply the mole fraction to solve the question:
Moles of gas / Total moles = Partial pressure of gas / Total pressure
Total moles = 1 H₂ + 2.5 He + 2O₂ = 4.5 moles
2 mol O₂ / 4.5 mol = Partial pressure O₂ / 4 atm
(2 mol O₂ / 4.5 mol ) . 4 atm = Partial pressure O₂ → 1.78 atm
Answer:
The partial pressure of oxygen is 1.45 atm
Explanation:
Step 1: Data given
Number of moles of hydrogen = 1 mol
Number of moles of helium = 2.5 mol
Number of moles of oxygen = 2 mol
Total pressure = 4 atm
Step 2: Calcualte total number of moles
Total number of moles = number of moles of hydrogen + number of moles of helium + number of moles of oxygen = 1 + 2.5 + 2 = 5.5 mol
Step 3: Calculate mol fraction of oxygen
Mol fraction oxygen = 2 mol / 5.5 mol = 0.3636
Step 4: Calculate partial pressure of oxygen
Partial pressure of oxygen = mol fraction of oxygen * total pressure
Partial pressure of oxygen = 0.3636 * 4 atm = 1.45 atm
The partial pressure of oxygen is 1.45 atm
