N₂O₃
MN₂O₃ = 2 × 14 + 3 × 16 = 28 + 48 = 76 (g)
%N = [tex]\frac{28}{76}[/tex] × 100% = [tex]\frac{2800}{76}[/tex]% ≈ 36,8%
%O = [tex]\frac{48}{76}[/tex] × 100% = [tex]\frac{4800}{76}[/tex]% ≈ 63,2%
