What is the total pressure of a 20.0 L vessel at 30.0 ° C holding 11.6 g N₂, 6.8 g O₂, and 5.3 g of He?

Question

Quizplus · Accepted Answer

To find the total pressure, use the ideal gas law PV = nRT for each gas and sum their pressures. Convert grams to moles: N2 = 0.414 mol, O2 = 0.213 mol, He = 1.325 mol. Total moles = 1.952 mol. Use R = 0.0821 L·atm/mol·K and T = 303 K. Total pressure = (1.952 mol)(0.0821 L·atm/mol·K)(303 K) / 20.0 L = 2.4 atm.

What Is the Total Pressure of a 20