Answer:
Partial pressure Kr → 546.1 mmHg
Partial pressure H₂ → 145.9 mmHg
Explanation:
To determine the partial pressure of each gas in the mixture we apply the mole fraction concept.
Mole fraction → Moles of gas / Total gas = Partial pressure / Total pressure
In this mixture: Partial pressure Kr + partial pressure H₂ = 692 mmHg
We determine the moles of each:
20.9 g / 83.80 g/mol = 0.249 moles Kr
0.133 g / 2 g/mol = 0.0665 moles H₂
Total moles: 0.249 moles Kr + 0.0665 moles H₂ = 0.3155 moles
Mole fraction Kr → 0.249 mol / 0.3155 mol = 0.789
Partial pressure Kr → 0.789 . 692mmHg = 546.1 mmHg
Partial pressure H₂ → 692mmHg - 546.1 mmHg = 145.9 mmHg
