Which statement is true according to the kinetic theory?
1. moles of different gases with the same mas and temperature always have the same average density.
2. molecules of different gases with the same mass and temperature always have the same average volume.
3. molecules of different gases with the same mass and temperature always have the same pressure.
4. molecules of different gases with the same mass and temperature always have the same molecular mass.
5.molecules of different gases with the same mass and temperature have the same average kinetic energy.