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Nitrogen dioxide is a chemical compound with the formula NO 2. One of several nitrogen oxides , nitrogen dioxide is a reddish-brown gas. It is a paramagnetic , bent molecule with C 2v point group symmetry .
In atmospheric chemistry, NO x is shorthand for nitric oxide (NO) and nitrogen dioxide (NO 2), the nitrogen oxides that are most relevant for air pollution. [1] [2] These gases contribute to the formation of smog and acid rain, as well as affecting tropospheric ozone.
Nitrogen dioxide poisoning is the illness resulting from the toxic effect of nitrogen dioxide (NO 2). It usually occurs after the inhalation of the gas beyond the threshold limit value. [1] Nitrogen dioxide is reddish-brown with a very harsh smell at high concentrations, at lower concentrations it is colorless but may still have a harsh odour.
The nitrogen dioxide (NO 2) and/or dinitrogen tetroxide (N 2 O 4) remains dissolved in the nitric acid coloring it yellow or even red at higher temperatures. While the pure acid tends to give off white fumes when exposed to air, acid with dissolved nitrogen dioxide gives off reddish-brown vapors, leading to the common names "red fuming nitric ...
Most of the water is condensed out, and the gases are further cooled; the nitric oxide that was produced is oxidized to nitrogen dioxide, which is then dimerized into nitrogen tetroxide: 2 NO + O 2 → 2 NO 2 2 NO 2 ⇌ N 2 O 4. and the remainder of the water is removed as nitric acid. The gas is essentially pure nitrogen dioxide, which is ...
Nitrogen dioxide, NO 2. Nitrous oxide, N 2 O. Dinitrogen trioxide, N 2 O 3. Dinitrogen tetroxide, N 2 O 4. Dinitrogen pentoxide, N 2 O 5. Trinitramide, N 4 O 6 ...
4) at low temperatures, and reverts to NO 2 at higher temperatures. Nitrogen forms nine molecular oxides, some of which were the first gases to be identified: N 2 O (nitrous oxide), NO (nitric oxide), N 2 O 3 (dinitrogen trioxide), NO 2 (nitrogen dioxide), N 2 O 4 (dinitrogen tetroxide), N 2 O 5 (dinitrogen pentoxide), N 4 O (nitrosyl azide ...
Like nitrogen dioxide NO 2, it is a radical (a molecule with an unpaired valence electron), which makes it paramagnetic. It is the uncharged counterpart of the nitrate anion NO − 3 and an isomer of the peroxynitrite radical OONO. [1] Nitrogen trioxide is an important intermediate in reactions between atmospheric components, including the ...