General Chemistry II: Problem Set 1

1. Define electronegativity.

2. Draw all the complete molecular structure (showing all atoms and bonds) AND the major partial charges found on individual atoms in the following molecules:

a. HCl

b. C₄H₉Li

c. CH₃OH

d. OF₂

e. CH₃COOH

3. Write the complete electron configuration for each of the following: P, N, and Cu⁺.

4. Draw the Lewis and molecular structures for each of the following show all bonds, nonbonding pairs, atoms, and nonzero formal charges:

a. N(CH₃)₄⁺

b. CH₂CHCH₃

c. CH₂OHCHOHCH₂OH

d. CCl₃COO^-

e. CF₂HCHO

f. NH₂NH₂

g. CH₃CONH₂

h. C₂H₅OCH₃

5. Identify the hybridization and bond angles about each carbon or oxygen atom in each of the following molecules:

a. C₂H₂

b. C₂H₄

c. C₂H₆

d. H₂CO

6. n-octane and 2,2,4-trimethyl pentane both have the same molecular formula C₈H₁₈.

a. Draw the molecular structure of each of these compounds showing all bonds and atoms.

b. Look up the boiling points for each of these and explain why they are different; to support your answer, include a diagram showing the attractions that have to be broken for these individual substances to boil.

c. Compare the vapor pressures of these two substances and fully support your prediction.

7. Calculate the fractions of gaseous argon atoms that have a kinetic energy greater than 10 kJ/mole at a temperature of 10,000 K and at a temperature of 298K.

8. Calculate the fractions of gaseous argon atoms that have a kinetic energy greater than 500 kJ/mole at a temperature of 10,000 K and at a temperature of 298K.