Chem. 1C Final
First initial
of last name
Practice Test 1
Name__________________________________________
Perm Number ___________________________________
All work must be shown on the exam for partial credit. Points will be taken off for
incorrect or no units. Calculators are allowed. Cell phones may not be used for
calculators. On fundamental and short answer problems you must show your work in
order to receive credit for the problem. If your cell phone goes off during the exam
you will have your exam removed from you.
Fundamentals
(of 72 possible)
Problem 1
(of 16 possible)
Problem 2
(of 10 possible)
Problem 3
(of 16 possible)
Problem 4
(of 26 possible)
Multiple Choice
(of 60 possible)
Extra Credit
(of 5 possible)
Final Total
(of 200 possible)
1
Fundamental Questions
Each of these fundamental chemistry questions is worth 6 points. You must show work
to get credit. Little to no partial credit will be rewarded. Make sure to include the
correct units on your answers.
1)
2)
6 pts
6 pts
[Fe(H2O)6]3+ absorbs light =700. nm. What is the value (in
what color will the complex appear?
) of Δo and
The table below lists information about the radioactive decay of three
nuclides. Fill in the missing information.
Nuclide
Decay Mode
Daughter Nuclide
Beta Emission
Positron Emission
3)
6 pts
Match the functional group with the letter of the corresponding molecule.
_____ secondary amine
_____ ester
_____ primary alcohol
_____ aldehyde
_____ carboxylic acid
_____ ether
2
4)
5)
6)
6 pts
6 pts
6 pts
Are the following paramagnetic or diamagnetic? You must show your
work to get credit.
[CoF6]3[Co(CN)6]3- [Co(CN)4]-
Draw the Lewis structure, identify the bond angles, molecular shape, and
determine if the structure is polar or nonpolar for the following modules:
SF4
IBr3
Determine the hybridization of all O and C atoms in the compound below and
circle all chiral carbons.
3
7)
6 pts
A wooden
w
boat discovered just
j south off the Great P
Pyramid in E
Egypt has a
carb
bon-14/carbo
on-12 ratio th
hat is 72.4%
% of that founnd in living organisms.
How
w old is the boat?
b
(The half-life
h
of ccarbon-14 is 5730yr.)
8)
6 pts
Dettermine the products
p
of th
he following reaction andd name the prroducts of thee
reacction.
+ H2O
+
9)
6 pts
10) 6 pts
→
What types of solids are thee following? (list multiplle if applicabble)
SiO2:___
__________
______________
CH4:___
___________
_____________
NaOH:_
___________
_______________
Ru:____
___________
____________
Wh
hich has the highest
h
vapo
or pressure?
CH3C
H2O
CH3CH2OH
CH2OCH2CH
H3
Wh
hich of the fo
ollowing liqu
uids freezes at the higheest temperatuure
benzenee
meth
hanol
carbonn tetrachloriide
Wh
hich of the fo
ollowing hass the highestt surface tenssion?
CH4
HF
C2H6
hich of the fo
ollowing liqu
uids will be the most visscous?
Wh
C3H8
C2H6
CH4
4
11) 6 pts
The vapor pressure of ammonia at several different temperatures is shown
in the table. Use the data to determine the heat of vaporization and normal
boiling point of ammonia?
Temperature (K) Pressure (torr)
200
65.3
210
134.3
220
255.7
230
456.0
235
597.0
12) 6 pts
Calculate the energy release per gram of 7Li for the following reaction:
7
Li + 1H  24He
4.0026 ,
1.0078 , and
7.0160
5
Short Answer Questions
Each of the following short answer questions are worth the noted points. Partial credit
will be given. You must show your work to get credit. Make sure to include proper units
on your answer.
1a) 8 pts
Krypton crystallizes with a face-centered cubic unit cell with side of
559 pm in length. What is the density of solid krypton in
?
1b) 8 pts
What percentage of krypton’s unit cell is empty space if each atom is
treated as a hard sphere?
6
2)
10 pts
The binding energy per nucleon for magnesium-27 is 1.326×10-12
Calculate the atomic mass of magnesium-27.
.
7
3a) 8 pts
What is the boiling point of an aqueous solution that is 5.5% by mass
NaNO3.
3b) 8 pts
If a new aqueous NaNO3 solution (not necessarily 5.5% by mass) has a
vapor pressure of 21.78 torr at 25˚C, what is the freezing point of the
solution?
8
4a) 5 pts
Draw and name all of the structural isomers of C3H5Br. Circle any structure that
can have geometric isomers.
4b) 4 pts
Propose an addition polymer that can form using one of your structural isomers as
the monomers. Draw the structure of the polymer.
4c) 6 pts
100. g of the polymer in part b was mixed with enough water to make 500. mL of
solution. If the osmotic pressure of the solution is 5.07 atm at 25˚C what is the
average molar mass of the polymer?
4d) 4 pts
How many monomers constitute the “average” molecule?
4e) 7 pts
What would be the vapor pressure of the solution if the vapor pressure of pure
.
water at 25˚C is 0.0313 atm? Assume the density of the solution is 1.00
(Assume that the polymer has negligible vapor pressure.)
9
Multiple Choice Questions
Each of the following multiple choice questions are worth 5 points.
Your answers need to be filled in on your ParSCORE form.
Note: Your ParSCORE forms will not be returned to you,
therefore, for your records, you may want to mark your answers on
this sheet. On the ParSCORE you need to fill in your perm
number, test version, and name. Failure to do any of these things
will result in the loss of 1 point. Your perm number is placed and
bubbled in under the “ID number”. Do not skip boxes or put in a
hyphen. In addition, leave bubbles blank under any unused boxes.
The version number (A) is bubbled in under the “test form.”
1. The phase diagram for a pure substance is given below.
The substance is stored in a container at 150 atm at 25°C. Describe what happens if the
container is opened at 25°C.
A) The solid in the container melts.
B) The vapor in the container escapes.
C) The solid in the container sublimes.
D) The liquid in the container freezes.
E) None of the above
2. _____ isomers and _______ isomers are classes of structural isomers.
A) Geometric, linkage
B) Coordination, linkage
C) Geometric, optical
D) Linkage, geometric
E) Coordination, geometric
10
Use the following to answer question 3:
When the U-235 nucleus is struck with a neutron, the Ce-144 and Sr-90 nuclei are
produced, along with some neutrons and beta particles.
3. How many beta particles are emitted?
A) 5
B) 2
C) 3
D) 4
E) None of the above
4. Which of the following statements is true of the fission of uranium-235?
A) The nuclides produced are individually heavier than the uranium nuclide.
B) The ultimate nuclides produced are more stable than the uranium nuclide.
C) two of these
D) The electron is captured by the nucleus, which becomes unstable.
E) The products include neutrons.
5. Which types of processes are likely when the neutron-to-proton ratio in a nucleus is too
large?
I.
decay
II.
decay
III. positron production
IV. electron capture
A) II, III
B) III, IV
C) II only
D) I, II
E) None of the above
6. In the molecular-orbital description of CO,
A) six molecular orbitals contain electrons.
B) there are two unpaired electrons.
C) the bond order is 3.
D) the highest energy electrons occupy antibonding orbitals.
E) All of these are false.
11
7. What is the complementary nucleic acid sequence for the DNA sequence CAC TAC
CTT GGC?
A) GTG ATG GAA CCG
B) CCC AAG GGG TTG
C) CAC TAC CTT GGC
D) TCA CCA TGC CTA
E) CGA GTG CAT CAG
8. Consider the following four compounds:
Which of these compounds would have the same physical properties (melting point,
boiling point, density, and so on)?
A) I and IV
B) II and III
C) III and IV
D) I and II
E) I and III
9. For which of the following diatomic molecules would the bond order become greater if
an electron were removed, that is, if the molecule were converted to the positive ion in
its ground state?
A) F2
B) P2
C) B2
D) Na2
E) C2
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10. When one mole of trans-tetraamminedichlorocobalt(III) chloride dissolves in water,
how many moles of ions does it produce?
A) 1 mole of ions.
B) 2 moles of ions.
C) 3 moles of ions.
D) 4 moles of ions.
E) None of the above
11. A polypeptide is
A) a part of nucleic acids.
B) an addition polymer of amino acids.
C) a condensation polymer of amino acids.
D) a polymer of sugar molecules.
E) None of the above
12. A solution of two liquids, A and B, shows negative deviation from Raoult's law. This
means that
A) molecules of A interact more strongly with B than with A or and more strongly than
B with B.
B) molecules of A interact strongly with other A-type molecules.
C) the molecules of A hinder the strong interaction between B molecules.
D) the two liquids have a positive heat of solution.
E) molecules of A interact weakly, if at all, with B molecules.
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