If the molar masses of two chemically non-reacting gases A ₂ and B ₂ are 28 amu and 32 amu respectively and 0.8g of A ₂ and 0.4g of B ₂ are enclosed in a container with a total pressure of 820 mm of Hg, then the partial pressure of A ₂ in atmosphere unit is ----------

Step-by-step solution

Number of moles of A ₂ , n_ A ₂ = 0.8 28 = 1 35 Number of moles of B ₂ , n_ B ₂ = 0.4 32 = 1 80 Total number of moles, n_ total = 1 35 + 1 80 = 16 + 7 560 = 23 560 Mole fraction of A ₂ , x_ A ₂ = n_ A ₂ n_ total = 1 35 23 560 = 16 23 Total pressure, P_ total = 820 760 atm = 41 38 atm Partial pressure of A ₂ , P_ A ₂ = x_ A ₂ P_ total = 16 23 41 38 = 328 437 0.75 atm Answer: 0.75