Distinguish the combined gas law from the ideal gas law.

The combined gas law only applies to gases at constant pressure, while the ideal gas law uses the ideal gas constant R and applies to gases of any pressure.

The combined gas law only applies to gases with a fixed number of moles, while the ideal gas law uses the ideal gas constant R and applies to gases with any number of moles.

The combined gas law only applies to gases at constant volume, while the ideal gas law uses the ideal gas constant R and applies to gases of varying volumes.

The combined gas law only applies to gases at a constant temperature, while the ideal gas law uses the ideal gas constant R and applies to gases at varying temperatures.