find the total numbers of compounds which contain S-S linkage.
`H_(2)S_(2)O_(3),H_(2)S_(2)O_(5),H_(2)S_(4)O_(6),H_(2)S_(2)O_(7),H_(2)SO_(2)O_(8),H_(2)SO_(2)O_(6)`

find the total number of compounds containing X-O-X linkage. (where X is the central atom) N_(2)O_(4),N_(2)O_(5),P_(4)O_(10),H_(2)S_(2)O_(8),H_(4)P_(2)O_(8),C_(3)O_(2),Cr_(2)O_(7)^(2-),Cl_(2)O_(7),(HPO_(3))_(3),(SO_(3))_(3)

How many of the following molecules do not contain peroxide linkage? H_(2)S_(2)O_(5),H_(2)SO_(5),H_(2)S_(2)O_(8),H_(4)P_(2)O_(8),H_(3)PO_(5),H_(2)S_(2)O_(6)

How many of these acids have S-S bonds? H_(2)S_(2)O_(3), H_(2)S_(2)O_(6), H_(2)S_(2)O_(7), H_(2)S_(2)O_(8), H_(2)SO_(5), H_(2)S_(n+2)O_(6) . (polythionic acid).

How many of these acids have S-S bonds? H_(2)S_(2)O_(3), H_(2)S_(2)O_(6), H_(2)S_(2)O_(7), H_(2)S_(2)O_(8), H_(2)SO_(5), H_(2)S_(n+2)O_(6) . (polythionic acid).

H_(2)underline(S_(2))O_(8)+H_(2)O to H_(2)SO_(4)+H_(2)O_(2)

H_(2)underline(S_(2))O_(8)+H_(2)O to H_(2)SO_(4)+H_(2)O_(2)

H_(2)underline(S_(2))O_(8)+H_(2)O to H_(2)SO_(4)+H_(2)O_(2)

How many of the following compounds have peroxy linkage? H_(3)PO_(5),H_(2)SO_(5),H_(2)S_(2)O_(8),HNO_(4),H_(4)P_(2)O_(7),H_(2)S_(2)O_(3),H_(2)S_(2)O_(6). [If your answer is 2 then write the answer as 0002.]

Out of H_(2)S_(2)O_(3),H_(2)S_(4)O_(6),H_(2)SO_(5) and H_(2)S_(2)O_(8) peroxy acids are: