Concordia University CHEM 221| CHEM221 1 L1 L2 answers Latest Summer .

L1-Electrons, Bonds and Molecular Properties
L2-Molecular Representations
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1) The formal charge on the nitrogen on the structure shown below is:




Answer: N = +1
Diff: 1


2) Draw a correct Lewis structure for acetonitrile, CH3CN, including all non-bonding lone pairs.
Answer:




Diff: 2

3) Draw 2 possible Lewis structures for the compound with molecular formula C3H6.
Answer:




Diff: 2


4) Write a Lewis structure for a compound with the molecular formula H2N2.
Answer:


Diff: 2

5) Assign the correct formal charge to each nitrogen atom in the following Lewis structure. (All non-
bonding electrons are included.)




Answer:



Diff: 2

6) Draw additional resonance contributors for:


1