Explanation:
According to the Bronsted-Lowry conjugate acid-base theory:
1) The conjugate base of acid : HBr
[tex]HBr\rightarrow H^++Br^-[/tex]
[tex]Br^-[/tex] is the conjugate base of HBr.
2) The conjugate base of acid : [tex]HCO_3^{-}[/tex]
[tex]HCO_3^{-}\rightarrow H^++CO_3^{2-}[/tex]
[tex]CO_3^{2-}[/tex] is the conjugate base of [tex]HCO_3^{-}[/tex]
3) The conjugate base of acid : [tex]CH_3CH_2CH_2OH[/tex]
[tex]CH_3CH_2CH_2OH\rightarrow H^++CH_3CH_2CH_2O^-[/tex]
[tex]CH_3CH_2CH_2O^-[/tex] is the conjugate base of [tex]CH_3CH_2CH_2OH[/tex]