Lewis Structure 1. C3COOH (Propanoic Acid) O // C - O - H / \ H C - H / \ H HCarbon has 4 valence electrons.Oxygen has 6 valence electrons.Hydrogen has 1 valence electron.2. C3H8 (Propane) H H H | | |H - C - C - C - H | | | H H H3. H2CO (Formaldehyde) O // C / \ H H4. C2H4 (Ethene) H H | |H - C = C - H | | H H5. C2H6 (Ethane) H H | |H - C - C - H | | H H6. C2H2 (Ethyne) H - C ≡ C - H7. C2H5OH (Ethanol) H H | |H - C - C - O - H | | H H8. (Not a Valid Chemical Formula)9. CH3OCH3 (Dimethyl Ether) H H | |H - C - O - C - H | | H HHOPE IT HELPS!