The correct answer is HOBr. Key Points - Hypobromous Acid is a weak and unstable acid. - When bromine reacts with water hypobromous acid is formed. - Br2+H2O⇄HOBr+HBr. - Hypobromous acid is used as a deodorant, oxidizer, and bleach. - The molecular weight of Hypobromous acid is 96.911g∕mol.