Pharaoh definition, meaning, English dictionary, synonym, see also 'Pharaoh ant',Pharaoh's ant',Pharaoh ant',Pharos', Reverso dictionary, English definition, English vocabulary Translation Context
The intake to this ventilation. system must be near the floor. (Chlorine as a gas is. 2.5 times heavier than air.) Exhaust Rate The exhaust system must be able to exchange the air. in the room every three to four minutes.
Nitrogen gas is less dense than air. Nitrogen is lighter than air because it has a lower density than air. The density of #N_2# gas at STP is #1.2056 kg/m^3#, and the density of air at STP is #1.293 kg/m^3#. So, there is less mass of #N_2# per cubic meter, and a greater mass of air per cubic meter.