21) What are the hybridizations of the carbon atoms in CH3CH2(CO)H, in order from left to right? Note that the C=O bond is a double bond. a. sp3,sp3,sp2 b. sp3,sp3,sp3 c. sp3,sp2,sp3 d. sp2,sp2,sp3 e. sp3,sp2,sp2 22) Which of the following has a central atom with the same hybridization as the carbon in formaldehyde (CH2O) ? a. SO2 b. OCS d. I3 c. ICl3 e. C2H2 23) Which one of the following species has four electrons in antibonding pi molecular orbitals? a. C226 d. Br2+35 b. O2+8 c. N227 e. Br22