\[
\begin{array}{|c|c|}
\hline \text{chemical formula} & \text{name} \\
\hline \text{HClO}_2 & \boxed{\text{chlorous acid}} \\
\hline \text{HBrO}_3 & \boxed{\text{bromic acid}} \\
\hline \text{HF} & \boxed{\text{hydrofluoric acid}} \\
\hline \text{H}_2\text{CO}_3 & \boxed{\text{carbonic acid}} \\
\hline
\end{array}
\]