The S.I. unit of universal gas constant is ____?

$\text{ Ideal gas equation }R=\frac{PV}{nT}$

The product of pressure and volume is energy and the S.I. unit of energy is Joule

        n= number of moles of gas unit= mole

        T = Temperature in Kelvin scale

         Therefore unit of universal gas constant is${\text{ Joule mole }}^{-1}{\text{ kelvin }}^{-1}$