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9. Which of the following covalent compounds share electrons via sp2 hybridization? Choose ALL that apply. a. Boron Trihydride, BH3 b. Ethane, C2H6 d. Formaldehyde, CH2O c. Ethene, C2H4 e. Methane, CH4 f. Silicon Tetrafluoride, SiF4 10. Based on bond polarity and VSEPR shape, for which of the following covalent compounds are dipole-dipole attractions the strongest intermolecular force? Choose ALL that apply. a. Ammonia, NH3 b. Benzene, C6H6 d. Nitrogen Tribromide, NBr3 c. Carbon Monoxide, CO e. Sulphur Hexafluoride, SF6 f. Sulphur Dioxide, SO2 Communication Section (10 marks total) Short Answer. Answer each question in the space provided. Remember to support your ideas using evidence and examples. (10 marks total; 2 marks each) 11. a) Draw the horizontal orbital diagram for the oxygen atom. b) Label and provide a point form explanation for each of the significant parts of the orbital diagram. ( 2 marks)