Final answer:
A real gas behaves like an ideal gas when the interaction between the gas particles is negligible, which is usually the case at high temperatures and low pressures.
Step-by-step explanation:
Under which of the following circumstances does a real gas behave like an ideal gas? The correct answer is that a real gas behaves like an ideal gas when the interaction between the gas particles is negligible. In an ideal gas, the particles move in such a way that there are no attractive or repulsive forces between them, allowing them to act independently of one another.
Additionally, real gases approach ideal behavior under conditions of high temperature and low pressure, where the particles have sufficient energy to overcome any intermolecular forces and the space between the particles is much greater in relation to their size. At low temperatures and high pressures, real gases deviate significantly from ideal behavior because intermolecular forces become more prominent and the volume of the gas molecules is no longer negligible.