Answer: 22.4 L.
- A 11.2 L
- B 22.4 L
- C 1 L
- D 44.8 L
Correct answer: B. 22.4 L
Explanation: The molar volume of an ideal gas at STP is about 22.4 litres.
Not all gas molecules move at the same speed - the Maxwell-Boltzmann distribution shows the spread, with the most probable speed vp slightly less than the average vavg, which is slightly less than the root-mean-square speed vrms used in the pressure formula.
Concept context
Kinetic theory of gases connects molecular motion to pressure and temperature, explaining gas laws, specific heats, and molecular speeds.