Explanation:

Kinetic energy: At absolute zero temperature (0 K), the molecules of a gas do not have any thermal energy, and thus they do not have any kinetic energy. Kinetic energy is the energy associated with the motion of particles, and since the particles at 0 K are not in motion, their kinetic energy is zero.

Potential energy: Potential energy is the energy associated with the position or arrangement of particles. At 0 K, the particles of a gas are in their lowest possible energy state, known as the ground state. This means that the potential energy of the gas particles is also at its minimum value. However, the potential energy is not necessarily zero, as it depends on the specific interactions between the gas particles.

Density: Density is a measure of how closely packed the particles of a substance are. At 0 K, the particles of a gas would be as close together as possible due to the absence of thermal energy. This would result in a higher density compared to when the gas is at a higher temperature. Therefore, the density of a gas at 0 K would not be zero.

Mass: The mass of a gas is a physical property that remains constant regardless of temperature. At 0 K, the mass of the gas particles would still be the same as at any other temperature. Therefore, the mass of a gas at 0 K would not be zero.

In conclusion, at 0 K, the only property of a gas that will be zero is its kinetic energy. The potential energy, density, and mass of the gas will not be zero at this temperature.