Final answer:
Mass is the extensive property of oxygen among the provided options, as it changes with the amount of oxygen, whereas boiling point, temperature, average kinetic energy, and density are intensive properties not dependent on the quantity.
Step-by-step explanation:
The question being asked is, 'Which of the following is an extensive property of oxygen?' Among the choices given, mass is the correct answer because extensive properties depend on the amount of the substance present.
Extensive properties change when the size of the sample changes. The mass of oxygen will vary depending on the quantity of oxygen you have. For instance, 2 moles of oxygen will have a different mass compared to 1 mole because mass is additive for a given substance. On the other hand, intensive properties do not depend on the amount of material and remain constant irrespective of the sample size. Properties such as boiling point, temperature, average kinetic energy of molecules, and density are considered intensive because they do not change with the quantity of the substance.
In summary, extensive properties include mass and volume, while intensive properties include boiling point, density, and temperature.