How many lone pairs are there on the underlined atom in the molecules and ions below? System SF2 Number of Lone Pairs System Number of Lone Pairs XeF2 SF4 XeF4 SF6 XeF3* SOF4 XeO2F2

NH3 Molecule ЕPG Hyb (circle if 2D Lewis Structure 3D Lewis Structure MG polar) ВА SF. PCI5

Select only, and all, of the drawings, shown below, which are acceptable Lewis diagrams for the species indicated. : :J: :CI: :CI: =C-H :CI: : CI: H Lewis structure of POCI3? Lewis structure of SO₂Cl₂? Lewis structure of NOCI? Lewis structure of HCN? Lewis structure of CHCI3?

Every atom in the molecule below shows a correct bonding pattern (free electron pairs are not shown). The molecule also contains at least 2 Cs and at bond: // H-C-C | ОН O True O False エーOーエ

= O ELECTRONIC STRUCTURE AND CHEMICAL BONDING Counting bonding and nonbonding electron pairs in a Lewis... Below is the Lewis structure of the methoxide H H:C:O: H e (CH₂O) ion. Count the number of bonding pairs and the number of lone pairs around the carbon atom. bonding pairs: lone pairs: X Ś 1/5

Below is the Lewis structure of the oxygen (0₂) molecule. 0:0 Count the number of bonding pairs and the number of lone pairs around the left oxygen atom in this molecule. bonding pairs: lone pairs: X

Molecule ЕPG Hyb (circle if polar) 2D Lewis Structure 3D Lewis Structure MG ВА H2SO4 N2H2 XeBr4

Use bond energies to estimate the energy change of this reaction. C3H8 + 5O2 → 3CO2 + 4H2O Show all work on your answer sheet. Bond Energies of Covalent Bonds Bond Energy (kJ/mol)   Bond   Energy (kJ/mol)   C–C 348                      N–N 163                       C=C 611                    N=N  418 C≡C 837                    N≡N  946 C–O 351                    N–H  389 C=O 799                    O–O  146 C–Cl 328                    O=O  498 C–H 414                    O–H  463 F–F 159                    S–H  339 H–Cl 431                    S=O  523 H–F 569                    Si–H  293 H–H 436                    Si–O  368

What are the total number of lone pairs of electrons in the following molecules/ions?      X: NCl3                    Y: SeO2                Z: CO2                          W: [NH4]+

Provide the Lewis, structure, Molecule/Ion type (i.e. AX3E, AX5, etc), Molecular Geometry, bond angle (the ideal/pure bond angle, not the bond angle as affect by lone pairs), and Polarity (a 3-d representation with bond and molecular dipoles annotated)