Given van der Waals’ constant for NH₃ , H₂, O₂ and CO₂ are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied?

Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for onehalf of the hydrogen to escape?

A gas such as carbon monoxide would be most likely to obey the ideal gas law at

What is the density of N₂ gas 227^oC and 5.00 atm. pressure? (R = 0.082 L atm K^$$-$$1 mol^$$-$$1)