Which of the following molecules are polar? H Br Br Br Br H H H- FC C H Br Br Br H Br Br Br (1) (2) (3) (4) O2 and 3 1, 2, and 3 1 only 1 and 4 1, 3, and 4
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- Select the moiecule with the strongest electron donating group. OOOO I ||| IV II :Br: IVWhat are the primary and secondary valences of Fe in [FeBr2Cl2(en)]2? Feo: [Ar] 4s? 3d6 +2, +6 +2, +5 -2, +6 O -2, +5Consider the following AB3 molecules and ions:PCl3, SO3, AlCl3, SO32- , and CH3+. How many of thesemolecules and ions do you predict to have a trigonal-planarmolecular geometry? (a) 1 (b) 2 (c) 3 (d) 4 (e) 5
- How many unbonded electrons are found around the nitrogen atom in the electron-point structure representation of the NH2 (-) ion?3 (a) Explain why BrF4 is square planar, whereas BF is tetrahe dral. (b) How would you expect the H-X-H bond angle to vary in the series H20, H2S, H2SE? Explain. (Hint: The size of an electron pair domain depends in part on the electronega- tivity of the central atom.) (30Both [Ni(CN)5]3- and BrF5 have square pyramidal molecular geometries. Out of the choices below, what is the difference between these two molecules? Group of answer choices The central Br atom has a valence lone electron pair while the central Ni ion does not Both the Ni-C and Br-F bonds are of the same type, covalent Apart from different atoms being in the two molecules, there are no structural differences The C-Ni-C bond angles are different than the F-Br-F angles
- Why energyof ionictransitionstate is reduced by polar solvents.What are the primary and secondary valences of Fe in [FeBr2Cl2(en)]2? Fe°:[Ar]4s?3d6 А. -2, +6 В. +2, +6 O C. +2, +5 O D. -2, +5Select one: True or False 1- Besides providing the largest suitable number of valance orbitals for covalent bond formation it can determine the final shape of the molecule for example Sp hybridization leads to a diagonal planner molecule, SP2 hybridization while Sp3 hybridization leads a pyramidal (tetrahydral shape) 2- About the underlying compound ( in the images ) , it it’s a calcium complex of EDTA used to treat metal toxicities like pulmbism in order to avoid hypocalcaemia.
- Which of the following bonds is the most polar (a) H¬F (b) H¬I (c) Se¬F (d) N¬P (e) Ga¬C?List the orbitals that can form sigma bonds in acovalent compound.Compare the atomic and molecular orbital diagrams to identify the member of each of the following pairs that has the highest first ionization energy (the most tightly bound electron) in the gas phase:(a) H and H2(b) N and N2(c) O and O2(d) C and C2(e) B and B2