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Chemistry 113 Practice Exam 4 Spring 2016
Directions on actual Exam: The exam consists of 2 sections (Chemical Bonding and Geometry and IMFs. Each multiple choice question is worth 4.33 points. You are allowed to use a scientific (nonprogrammable) calculator, periodic table, and VSEPR Theory Table.
Useful information:
ΔH°rxn = Σn×D(bonds broken) - Σn×D(bonds formed)
where Σn represents the sum of the moles of a particular type of bond
D represents bond energy per mole of bond
Chemical Bonding and Geometry
1.
The Lewis dot symbol for the calcium ion is
A)
2+
B)
Ca
C)
2+
D)
Ca2+
E)
Ca
2.
The electron dot structure for AsCl3 molecule shows
A)
a total of 84 electron dots
B)
three single bonds and 10 lone pairs
C)
two single bonds, one double bond, and 9 lone pairs
D)
one single bond, two double bonds, and 8 lone pairs
E)
three single bonds and one lone pair
3.
The correct Lewis structure for CO2 is: C
O
O
A)
O
O
B)
O
O
C)
O
O
D)
O
4.
Which of the following Lewis structures is incorrect ?
A)
B)
C)
D)
E)
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