Respuesta :
Oxygen is always -2 and Hydrogen is always +1. For the compound to be overall have a charge of zero, all the charges have to add to zero.
1 + x + 3(-2) = 0
1 + x -6 = 0
-5 + x = 0
x = +5
1 + x + 3(-2) = 0
1 + x -6 = 0
-5 + x = 0
x = +5
HNO3 (Nitric acid)
H⁺¹ N⁺⁵ O₃⁻²
Oxidation numbers:
Hydrogen: +1
Nitrogen: +5
Oxygen : -2
ANSWER The oxidation number of nitrogen is +5
[tex]\textbf{Spymore}[/tex]