15. The central Xe atom in the XeFa molecule has- electron pairs and shell. nonbonded electron pairs in its valence A) 1,4 B) 4, 2 C) 4,0 D) 4, 1 E) 2, 4 16. In carbon dioxide, CO2, there are sigma(s) bonds and pi ) bonds in the molecule. a. 2,2 b. 3,3 c. 1,1 d. 0,2 e. 2,0 17. Of the molecules listed below, only is non-polar a. CO b. H20 c. NH3 d. HC e. IF 18. The hybridizations of IFj and IFs are respectively. and a. sp, sp’d b. sp’d, sp’d c. sp’d, sp e. sp’d, sp’d