A) N2O5 :
N = 3,0 ; O = 3,44; 3,44 -3,0 = 0,44
B) H2O :
H = 2,1; O = 3,44; 3,44 - 2,1 = 1,34
C) Na2O :
Na = 0,9; O = 3,44; 3,44 - 0,9 = 2,54
A) N2O5 :
N = 3,0 ; O = 3,44; 3,44 -3,0 = 0,44
B) H2O :
H = 2,1; O = 3,44; 3,44 - 2,1 = 1,34
C) Na2O :
Na = 0,9; O = 3,44; 3,44 - 0,9 = 2,54