Which of the following pairs describes one intensive and one extensive property? -mass and volume
-volume and length
-density and color
-mass and density

Mass and Volume

Explanation:

Extensive property are the properties which are dependent on the mass or size of the system

The kinetic theory state about the relationship between the speed and temperature of gas molecules "As the temperature increases, the speed of gas molecules increases".

Option: C

Explanation:

The temperature relates to a gas, according to the kinetic theory of gases, influences the rate of motion of the gas particles. The higher the gas temperature, the faster the gas particles are moving; the reverse is true, too.

This is because the gas particles gain more kinetic energy as the temperature of the gas increases, and therefore move faster and collide more with each other and the container walls.The rate of a gas's molecules is proportional to the temperature, and is inversely proportional to the gas's molar mass.