Using ideal gas law, pV = nRT
          Â
Where, p = pressure in atm = 1 atm
          Â
V =volume in L
          Â
n = number of moles = 1
         [standard
condition]
          Â
R = universal gas constant= 0.08205746 atm L
mol-1K-1
Volume, V = nRT/ P = [1 mol x (0.08205746 atm L
mol-1K-1) x 288 K ] = 23.63255
L
Mass of 1 mole N2 gas = moles x molecular mss
                                  Â
= 1 mole x 28.014 g mol-1
                                  Â
= 28.014 g
Density = mass / volume
          Â
= 28.014 g / 23.63255 L = 1.185 g/ L