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.

The correct statement is 5.

Explanation:

The kinetic theory describes that the gases contain a large number of small rapidly moving particles, called molecules, that have the same mass.

Also the thermodynamic temperature of the ideal gas is directly dependent to the average kinetic energy of the gaseous molecules.

Therefore, according to this theory, gaseous molecules having identical mass and thermodynamic temperature must possess the same exact kinetic energy.

i just learnt this recently but i need to look through my notes again

particle   p is an electron and particle q is a neutron