The incomplete table below shows selected characteristics of gas laws. Name Variables Constants Equation ? Pressure, volume Temperature, moles of gas PV = k Charles’s law ? ? V = kT Gay-Lussac’s law ? ? ? Combined gas law ? ? StartFraction P Subscript 1 Baseline V Subscript 1 Over T Subscript 1 EndFraction = StartFraction P Subscript 2 Baseline V Subscript 2 Over T Subscript 2 EndFraction What are the variables in Gay-Lussac’s law? pressure and volume pressure, temperature, and volume pressure and temperature volume, temperature, and moles of gas.