Which of the following are characteristics of ideal gases?

The correct choice emphasizes that ideal gases are defined by the assumption that they occupy no volume and that they perfectly adhere to the ideal gas law. This means that the gas particles are considered as point-like entities with no physical volume, allowing for the idealization used in various gas law calculations. According to the ideal gas law, the relationships between pressure, volume, temperature, and number of moles for a given gas are linear and predictable, applying universally for an ideal gas under specific conditions.

In an ideal gas scenario, it’s also presumed that there are no intermolecular forces acting between the gas particles, which allows them to move freely and exert pressure uniformly when in a container. This simplification is useful in calculations and theoretical models, especially when dealing with gases at low pressures and high temperatures, where real gas behavior tends to resemble that of an ideal gas.

This idealization is crucial for deriving various equations related to gas behavior, such as Boyle's law, Charles's law, and Avogadro's law, which are foundational in understanding gaseous states in chemistry.