Nome: nitrogen dioxide
* IUPAC
Numero CAS: 10102-44-0
Formula chimica: NO₂
Massa molare: 46.0055 g
Percentuale di massa: N 30.445 %; O 69.554 % 

• inorganico

• "is an important contributor to photochemical smog in many urban areas, eventually reacts with moisture in the air and reaches the soil to form nitrate salts, which are plant nutrients." 1

• "The brownish hazes that often hang over such cities as Los Angeles, Denver, and Mexico City are due to the presence of brown NO₂." 2

Cu (s) + 4 HNO3 (aq) → Cu(NO3)2 (aq) + 2 NO2 (g) + 2 H2O (ℓ) 6
2 Cu(NO3)2 (s) → 2 CuO (s) + 4 NO2 (g) + 1 O2 (g) 7
N2 (g) + 2 O2 (g) → 2 NO2 (g) 8
N2O4 (g) → 2 NO2 (g) 9
2 N2O5 (s) → 4 NO2 (g) + O2 (g) 10
NiS (s) + 4 HNO3 (aq) → Ni(NO3)2 (aq) + S (s) + 2 NO2 (g) + 2 H2O (ℓ) 11
2 NO (g) + 1 O2 (g) → 2 NO2 (g) 12
3 NO2 (g) + 1 H2O (ℓ) → 2 HNO3 (aq) + NO (g) 13
NO (g) + 1 O3 (g) → NO2 (g) + O2 (g) 14
2 NO2 (g) + 1 O3 (g) → N2O5 (g) + O2 (g) 14
6 HNO3 (aq) + S (s rhombic) → 6 NO2 (g) + H2SO4 (aq) + 2 H2O (ℓ) 

Wikipedia
riviste:
Hackspill, Besson, Bull. Soc. Chim. France, Mem. [5] 16, 479 (1949)
Sisler, J. Chem. Ed. 34, 555 (1957)

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