Объяснение:
1) N((I), N(IV), N(V), N(III)
2) C(IV)O(II), S(VI)O(II), Fe(III)O(II), H(I)O(II), P(III)H(I), C(IV)H(I), Ca(II)Cl(I), N(III)H(I), Ca(II)C(IV)O(II), Na(I)S(VI)O(II), H(I)N(V)O(II)
3) S(II), S(IV), S(IV), S(VI)
