The One whom we owe the existence of an equivalent amount of gas Relative absorption Air 1 Oxygen 1 Nitrogen 1 Hydrogen 1 Carbonic oxide 750 Carbonic acid 972 Hydrochloric acid. 1,005 Nitric oxide 1,590 Nitrous oxide 1,860 Sulphide of hydrogen 2,100 Ammonia 5,460 Olefiant gas 6,030 units, while.