Soda #9

"TAB" Brand of soda

#9-A compound with at least 3 different elements.
-Carbonic acid has 3 different elemnts (H2CO3), it has hydrogen, carbon, and oxygen. Carbonic acid is used in sodas to make the soda fizzy, it also helps keep the flavor in the soda strong. This is a key component to soda so it can be stored for longer periods of time.
-Cite: http://www.wisegeek.com/what-is-carbonic-acid.htm