HNO2=acid azotos
HNO3=acid azotic
a) raport atomic HNO2 --> H:N:O=1:1:2
HNO3--> H:N:O=1:1:3
b)raport de masa HNO2-->H:N:O=1:14:32
HNO3-->H:N:O=1:14:48
c) compozitie procentuala :
HNO2 : M moleculara=1+14+32=47g/mol
47g.....1 g H...14 g N...32g O
100g...x gH ...y g N ....z g O
x=1x100/47=2.127% H
y=14x100/47=29.78% N
z=32x100/47=68.08% O
HNO3: M moleculara=63g/mol
63g.......1g H....14g N....48 g O
100g....x y z
x=1x100/63=1.587% H
y=14x100/63=22.22% N
z=48x100/63=76.19% O
