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Unformatted text preview: Use expanded octets as necessary. PF 5 , I 3-, SF 4 , GeF 4 . 6. Ethanol is a possible fuel. Use average bond energies to calculate ΔH rxn for the combustion of ethanol: CH 3 CH 2 OH (l) + 3 O 2 (g) 2 CO 2 (g) + 3 H 2 O (g) 7. Determine the electron geometry, molecular geometry, and bond angles for each of the following molecules. PF 3 , SBr 2 , CHCl 3 , CS 2 . 8. Determine the electron geometry, molecular geometry, and bond angles for each of the following molecules. CF 4 , NF 3 , OF 2 , H 2 S. 9. Which species has the smaller bond angle, ClO 4-, or ClO 3-? Explain. 10. Determine whether each of the following molecules is polar or nonpolar. ClO 3-, SCl 2 , SCl 4 , BrCl 5 ....
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