The ideal gas law is a fundamental equation in chemistry and physics that describes the behavior of ideal gases. It combines several gas laws into one formula: PV = nRT, where P represents pressure, V is volume, n is the number of moles of gas, R is the ideal gas constant, and T is temperature in Kelvin. This law helps predict how gases will react under different conditions. In an ideal gas, it is assumed that the gas particles do not interact with each other and occupy no volume. While real gases do not perfectly follow this law, it provides a useful approximation for many gases under standard conditions, making it a key concept in thermodynamics and physical chemistry.