Chemistry Assignment Guruh Worksheet

NI 2

ENGR 1540 Worksheet 15 Chapter 7

1. Draw a Lewis structure for each of the following molecules or ions.
a. CS2
b. BF4-
c. HNO2 (where the bonding is in the order HONO)
d. OSCl2 (where S is the central atom)

2. Write Lewis structures for these molecules.
a. Tetrafluoroethylene, C2F4, the molecule from which Teflon is made
b. Acrylonitrile, CH2CHCN, the molecule from which Orlon® is made

3. Draw resonance structures for
a. NO2-
b. NNO
c. HCO2-

4. Draw the Lewis structure of two resonance forms for ozone, O3.

5. Which of the species listed has a Lewis structure with only one lone pair of electrons? F2, CO32-, CH4, PH3

6. Draw the Lewis structure for each of the following molecules.
a. BBr3
b. SO2
c. O3
d. XeF4

7. Draw the Lewis structure for each of the following ions.
a. CN-
b. NH4+
c. CO32-

8. CO, CO2, CH3OH, and CO32-, all contain carbon-oxygen bonds. Draw Lewis structures for these molecules and ions. Given that double bonds are stronger than single bonds and triple bonds are stronger than double bonds, rank the four species in order of increasing C—O bond strength.

9. Draw the Lewis dot structure of the following species.
a. CS2
b. CH3Cl
c. NO2-
d. SO2
10. Draw the Lewis dot structures of the following compounds.
a. Cl2O
b. H2CCH2
c. HCCCN
d. SiO2

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