is used as an embalming agent. Draw the structure of CH2O, including lone pairs. 10. Each pictured Lewis structure is invalid. Identify the error in each case. answer bank : octet-rule violation , wrong electron total 11. Draw the Lewis structure of CO2. Include lone pairs on all atoms, where appropriate. 12. Draw the Lewis structure of OF2. Include lone pairs on all atoms, where appropriate. 13. Draw the Lewis structure of NCl3. Include lone pairs. 14. Draw the Lewis structure of SiH4. Include lone pairs, as needed. 15. Draw the Lewis structure of HCN. Include lone pairs. 16. Determine the total number of nonbonding electrons that should be added to each of these molecules. nonbonding electrons: nonbonding electrons: nonbonding electrons: 17. How many single, double, and triple bonds are in this molecule? single bonds: double bonds: triple bonds: 18. How many single, double, and triple bonds are in this molecule? single bonds: double bonds: triple bonds: 19. Select the atoms or ions drawn with valid Lewis dot structures. 20. Complete the Lewis structures of the atoms and ions by adding electrons as needed. Li Na
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