Oxidation number of N in N2O5?

Answer 1

Unless oxygen is combined with fluorine or isolated from other atoms, the oxidation number of oxygen atoms is always taken as -2. This gives a total oxidation number charge of -10 for the five oxygen atoms in N2O5. To maintain electrical neutrality as required for all compounds, the two nitrogen atoms must have a total oxidation charge of +10, so that each of the two nitrogen atoms has an oxidation number of +5.

Answer 2

NO2 is a poly atomic Ion with 1- charge. So NO2 = -1 total. O has a charge of -2 and there are 2 of them so O=+4……. (N Charge) + (+4 Charge) = -1 Charge ……. So N =+3 Polyatomic Ions are special. Their net oxidization always equals their ionic charge.

Answer 3

Nitrites contain the nitrite anion, NO2-, wher N has an oxidation number of +3

Answer 4

HNO3

H=+1
O=-2 times 3 is -6

so as the whole molecule must =0

N=+5

-6+1+5=0

Answer 5

+3 for N