CHM 2210C Chapter 2 Part C Sample Exam Answers                

Chapter 2 Part C: Polarity of Molecules      10 points

 

Draw the dot structure for the following compounds, then state whether the molecule is polar or nonpolar:

 

The electronegativity of selected nonmetal elements: F 4.0; O 3.5; N 3.0; Cl 3.0; Br 2.8; C 2.5; S 2.5; H 2.1; P 2.1

 

 

__polar_______1.  H2O

 

 

_nonpolar ____2.  CO2

 

 

__ nonpolar _ _3.  C2H4

 

 

__ polar ______4.  SO2

 

 

_ nonpolar  ___5.  SO3

 

 

__ polar _____6.  HCN

 

 

_ nonpolar ____7.  CH4

 

 

___ polar _____8.  NH3

 

 

___ polar _____9.  CH2O

 

 

_ nonpolar ____10. C2H2

 

 _ nonpolar __Bonus. PF5

 

  _ nonpolar __Bonus  SF6

 

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