among b2h6,b3n3h6,n2o,n2o4,h2s2o3 and h2s2o8 the total number of molecules containing covalent bond between two atoms of the same kind is?
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the branch of science concerned with the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances.
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Answer:
N2O,N2O4,H2S2O3 ,H2S2O8
total =4
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