The ideal gas law is a fundamental equation in thermodynamics that relates the pressure, volume, temperature, and amount of gas. The equation is given by:
\[
PV = nRT
\]
Where:
- \( P \) is the pressure,
- \( V \) is the volume,
- \( n \) is the number of moles of gas,
- \( R \) is the ideal gas constant,
- \( T \) is the temperature in Kelvin.
This equation describes the behavior of ideal gases under various conditions of pressure, volume, and temperature.
Thus, the correct equation is \( PV = nRT \).