Answer – Given, density = 1.19 g/L , room
measurements = 14.5 × 18.5 × 9.0ft
We know the volume = 14.5 ft × 18.5 ft × 9.0 ft
             Â
                    =
2414.25 ft3
We need to convert the ft3 to dm3
1 ft3 = 28.32 dm3
So, 2414.25 ft3 = ?
= 68363.9 dm3
We know, 1 dm3 = 1 L
So, 68363.9 L
So, mass of air = density * volume
                       Â
= 1.19 g/L *68363.9 L
                       Â
= 81353.04 g
                       Â
= 81.35 kg
So answer in two significant figure is 81
kg
