Question 1
The mole fraction of oxygen molecules in dry air is 0.2095. What volume of dry air at 1.00 atm and 25°C is required for burning 1.00 L of octane (C
8H
18, density = 0.7025 g/mL) completely, yielding carbon dioxide and water?
◦ 150 L
◦ 367 L
◦ 718 L
◦ 1880 L
◦ 8970 L
Question 2
The molecules of different samples of an ideal gas have the same average kinetic energies, at the same
◦ pressure.
◦ temperature.
◦ volume.
◦ density.