1 L closed flask contains a mixture of 4 g of methane and 4.4 g of carbon dioxide. The pressure inside the flask at \({2…

• Volume, V = 1 L
• Temperature, T = 27°C = 300 K
• Mass of CH₄ = 4 g, Molar mass = 16 g/mol → Moles, n₁ = 4/16 = 0.25 mol
• Mass of CO₂ = 4.4 g, Molar mass = 44 g/mol → Moles, n₂ = 4.4/44 = 0.1 mol
• Total moles, n = 0.25 + 0.1 = 0.35 mol
• Gas constant, R = 0.0821 L atm K⁻¹ mol⁻¹

Using the ideal gas equation:
PV = nRT
P × 1 = (0.35) × (0.0821) × (300)
P = 8.62 atm