Chem 163 – Honors General Chemistry 1
Practice Exam 1 Content – ANSWER KEY
Instructions: Time yourself for 80 minutes. Use only the calculator, periodic table, and
formula sheet that you would have access to on the actual exam.
1. Acetone, the main ingredient in nail polish remover, has a density of 791. kg/m3 at 25 C.
What is this value in g/cm3?
a. 7.91 x 10-4 g/cm3
b. 7.91 x 10-1 g/cm3
c. 7.91 x 103 g/cm3
d. 7.91 x 107 g/cm3
2. How many tungsten, W, atoms are in a spherical piece of jewelry with a diameter of 12.3
mm? The density of tungsten is 19.25 g/cm3. Vsphere = (4/3)r3
a. 6.14 x 1022 atoms
b. 4.92 x 1023 atoms
c. 2.08 x 1027 atoms
d. 1.66 x 1028 atoms
3. Choose the species that does NOT have the same number of neutrons as 31P3-
31
a. P
35
b. K+
29
c. Si
34
d. Ar
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, 4. Which of the following equations correctly describes the second ionization energy of
Oxygen?
a. O2-(g) → O(g) + 2e-
b. O2 (g) → 2 O(g)
c. O-(g) + e- → O2-(g)
d. O+(g) → O2+(g) + e-
e. O(g) → O2+(g) + 2e-
5. The Green Fluorescent Protein (GFP), and its derivatives, are commonly used as
biological markers in modern molecular biology experiments.
The protein can absorb light at 395 nm, which transitions the protein from its ground
electronic state (GS) to an excited electronic state (ES-A).
The protein then transitions to another state (ES-B) before, finally, emitting light with a
wavelength of 510 nm, which we see as green.
Based on the information above, what can be concluded about the ordering of energy of
GS, ES-A and ES-B?
a. GS < ES-A < ES-B
b. GS = ES-B < ES-A
c. GS < ES-B < ES-A
d. GS = ES-A = ES-B
6. Choose the correct number of valence electrons for antimony, Sb.
a. 2
b. 5
c. 12
d. 13
e. 15
This study source was downloaded by 1570889 from cliffsnotes.com on 12-07-2025 11:47:08 GMT -06:00
https://www.cliffsnotes.com//study-notes/24115774
Practice Exam 1 Content – ANSWER KEY
Instructions: Time yourself for 80 minutes. Use only the calculator, periodic table, and
formula sheet that you would have access to on the actual exam.
1. Acetone, the main ingredient in nail polish remover, has a density of 791. kg/m3 at 25 C.
What is this value in g/cm3?
a. 7.91 x 10-4 g/cm3
b. 7.91 x 10-1 g/cm3
c. 7.91 x 103 g/cm3
d. 7.91 x 107 g/cm3
2. How many tungsten, W, atoms are in a spherical piece of jewelry with a diameter of 12.3
mm? The density of tungsten is 19.25 g/cm3. Vsphere = (4/3)r3
a. 6.14 x 1022 atoms
b. 4.92 x 1023 atoms
c. 2.08 x 1027 atoms
d. 1.66 x 1028 atoms
3. Choose the species that does NOT have the same number of neutrons as 31P3-
31
a. P
35
b. K+
29
c. Si
34
d. Ar
This study source was downloaded by 1570889 from cliffsnotes.com on 12-07-2025 11:47:08 GMT -06:00
https://www.cliffsnotes.com//study-notes/24115774
, 4. Which of the following equations correctly describes the second ionization energy of
Oxygen?
a. O2-(g) → O(g) + 2e-
b. O2 (g) → 2 O(g)
c. O-(g) + e- → O2-(g)
d. O+(g) → O2+(g) + e-
e. O(g) → O2+(g) + 2e-
5. The Green Fluorescent Protein (GFP), and its derivatives, are commonly used as
biological markers in modern molecular biology experiments.
The protein can absorb light at 395 nm, which transitions the protein from its ground
electronic state (GS) to an excited electronic state (ES-A).
The protein then transitions to another state (ES-B) before, finally, emitting light with a
wavelength of 510 nm, which we see as green.
Based on the information above, what can be concluded about the ordering of energy of
GS, ES-A and ES-B?
a. GS < ES-A < ES-B
b. GS = ES-B < ES-A
c. GS < ES-B < ES-A
d. GS = ES-A = ES-B
6. Choose the correct number of valence electrons for antimony, Sb.
a. 2
b. 5
c. 12
d. 13
e. 15
This study source was downloaded by 1570889 from cliffsnotes.com on 12-07-2025 11:47:08 GMT -06:00
https://www.cliffsnotes.com//study-notes/24115774
