Lewis Structures/Formal Charge
VSEPR, Hybridization, and Bonding
Intermolecular Forces
Percent Mass, Empirical Formulas, and Molecular Formulas
Other Exam Questions
100

What is the correct Lewis Dot Structure of H2O?


100

What is the Electron Geometry, Molecular Shape, and Bond Angle of CH4?

EG= Tetrahedral

MS= Tetrahedral

Bond Angle= 109.5o

100

What IMF is the only force exhibited in non polar molecules?

London Dispersion

100

If the percent yield for the following reaction is 75.0%, and 45.0 g of NO2 are consumed in the reaction, how many grams of nitric acid, HNO3(aq), are produced?

3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g)

30.8 grams

100

Which of these molecules is an Ionic Compound?

H2O

CH4

KF

CH3CH2CH(O)

KF

200

What is the Lewis Structure of SO2?


200

What is the Hybridization of the central atom in SF4?

sp3d

(5 Domains)

200

Rank the IMFs in order of strength (Lowest to Highest) *Hint there are FOUR*

LD < Dip-Dip < HB < Ion-D

200

What is the empirical formula for ethyl fluoride if the compound contains 49.97% carbon, 10.51% hydrogen, and 39.52% fluorine by mass?

C2H5F

200

Which molecule(s) is/are polar?

H2O

CH3CH2

BF2Br

H2O and BF2Br

300

What is the formal charge of all of the O atoms in PO43-? (Hint: Draw the LDS)

P-O: -1

P=O: 0

300

If a molecule has three atoms connected to the central atom, along with one lone pair, what is the molecular shape of this molecule? What is the bond angle?

Trigonal Pyramidal and 109.5o

300

Rank these molecules from lowest to highest boiling point. 

Br2

NH3

HBr

Br< HBr < NH3

300

How many sulfur atoms are in 25.6 g of Al2(S2O3)3?

2.37 x 1023 S atoms

300

Which molecule has a greater lattice energy?

LiF or NaF



NaF

400

What is the Formal Charge of Xe in XeOF4?

FC of Xe: -1

400

What is the electron geometry of IF4- ?

EG: Octahedral

400

Which has the highest boiling point?

HBr or H2S or HCl

HCl

400

 Caffeine has an elemental analysis of 49.48% C,
5.190% H, 16.47% O, and 28.85% N. It has a
molar mass of 194.19 g/mol. What is the molecular
formula of caffeine?

C8H10N4O2

400

How many sigma and pi bonds are in this molecule?


6 sigma

3 pi

500

Draw the structure that contributes the most to the resonance of SO32-.


500

What is the bond angle of a molecule with 2 atoms attached to the central atom and 3 lone pairs?

180o (Linear)
500

Which molecule shows greater IMFs?


H2O or Cl2

H2O (Hydrogen Bonding)

500


Determine the combined mass percent composition
of oxygen and nitrogen in Urea, CH4N2O.

73.3% combined O & N

500

The graph shows the potential energy curve for the

interaction of charged particles in an ionic

compound. Which of the pictures shown below

best depicts the particle - particle interaction at the

position indicated by the arrow?



C