What is the total pressure in a 4.00 L flask at 298 K, that contains 2.6 moles of He, 0.8 mole of Ne, 1.6 moles of O₂?

Question

Quizplus · Accepted Answer

The total pressure can be calculated using the ideal gas law: P = (nRT)/V. The total moles of gas (n) is 2.6 + 0.8 + 1.6 = 5.0 moles. Using R = 0.0821 L·atm/(mol·K) and T = 298 K, P = (5.0 moles * 0.0821 L·atm/(mol·K) * 298 K) / 4.00 L = 30.6 atm, which rounds to 31 atm.

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