\begin{tabular}{|c|c|c|c|} \hline PbI2 & lead iodide & & Explanation \\ \hline Mg(NO3)2 & magnesium (II) nitrate & & \\ \hline P2O3 & diphosphorous oxide & & \\ \hline H2CO3 & hydrocarbonic acid & & \\ \hline CI4 & carbon (IV) iodide & & \\ \hline \end{tabular}