## Chemistry 9th Edition

a. acetylene, $C_2H_2$, and benzene $C_6H_6$ c. nitrogen dioxide, $NO_2$, and dinitrogen tetroxide, $N_2O_4$
a. Both $C_2H_2$ and $C_6H_6$ have the empirical formula of $CH$. c. Both $NO_2$ and $N_2O_4$ have the empricial formula $NO_2$.