Question

Avogadro's Law is correctly represented by which of the following statements?

• A. The volume of a gas is directly proportional to its temperature at constant pressure.
• B. Equal volumes of gases at the same temperature and pressure contain an equal number of molecules.
• C. The pressure of a gas is directly proportional to its absolute temperature at constant volume.
• D. The total pressure of a mixture of gases is equal to the sum of the partial pressures of the individual gases.

Answer 1

Answer:

B. Equal volumes of gases at the same temperature and pressure contain an equal number of molecules.

Avogadro's Law, or Avogadro's hypothesis, states that under the same conditions of temperature and pressure, equal volumes of different gases contain an equal number of molecules. Avogadro law states that equal volumes of all gases under the same conditions of temperature and pressure contain an equal number of molecules Avogadro made a distinction between atoms and molecules. Since the volume of a gas is directly proportional to the number of moles; one mole of each gas at standard temperature and pressure (STP) will have the same volume.