A sample of oxygen gas collected at a pressure of 998 mm Hg and a temperature of 295 K has a mass of 38.4 grams. The volume of the sample is?

Molar mass of O₂ = 16.00 × 2 g/mol = 32.00 g/mol

Pressure, P = 998/760 atm
No. of moles, n = 38.4/32.0 mol
Temperature, T = 295 K
Gas constant, R = 0.08206 atm L / (mol K)

Gas law : PV = nRT
Volume of O₂, V = nRT/P = (38.4/32.0) × 0.08206 × 295 / (998/760) L = 22.1 L

V=22.13L