The Louisiana Superdome has an interior volume of 125 million ft?, covered by a 440,000 ft2 roof. On a particular day, the interior air pressure gave a manometer reading of

19 inches mercury (pHy = 13.6 g/cm).Local atmospheric pressure is 102 kPa. 1.kg (10) Calculate the mass of the air inside, assuming an average temperature of 20 C.