CHM 1025C Exam #4 Module Four II Sample Exam       

 

Module Four II- Part O: Polarity of Molecules      10 points

Use the dot/stick structures and sketch the molecule in three dimensions. Then draw the dipoles for each bond to state if the molecule is polar or nonpolar:

 

Electronegativities: F=4.0; O=3.5;  N=3.0; Cl=3.0; Br=2.7; C=2.5; S=2.5; P=2.1; H=2.1

 

_____________1.  H2O

 

 

_____________2.  CO2

 

 

_____________3.  C2H4

 

 

_____________4. C2H2

 

 

_____________5. SO2

 

 

_____________6. SO3

 

 

_____________7.  CH4

 

 

_____________8.  NH3

 

 

_____________9.  BH3

 

 

_____________10. HCN

 

 

           

 _____________Bonus. PCl5                      

 

 _____________Bonus  SCl6