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N-14u
O2- 32u
HNO2- 47u
47/14 = 100%/x
x= 29,78
H-1u
N-14u
O3-48u
HNO3- 63u
63/14 = 100%/x
x= 22,22%
Odp: Większa zawartosc procentowa azotu jest w kwasie azotowym(III).