(Solved): hydrobromic acid is added to cobalt metal Express your answer as a chemical equation including ph ...

hydrobromic acid is added to cobalt metal Express your answer as a chemical equation including phases. Which of the following could be the anion of the unknown salt: \( \mathrm{Cl}^{-}, \mathrm{S}^{2-}, \mathrm{NO}_{3}{ }^{-} \)? \[ \begin{array}{l} \mathrm{Cl}^{-} \\ \mathrm{S}^{2-} \\ \mathrm{NO}_{3}^{-} \end{array} \]