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Chemistry 162
Exam I
February 19, 2003
Student Name:
_____________________
Recitation Section Number:
____
Recitation Instructor:
_________________________
01
= M3, M. Rabeony
03
= M5, R. Agarwal
04
= M5, B. Langowski
06
= W3, M. Rabeony
07
= W3, B. Langowski
08
= W5, B. Langowski
11
= F3, M. Rabeony
17
= M1, R. Agarwal
19
= M3, N. Marky
20
= M3, R. Agarwal
23
= W1, E.Tavss
25
= W3, E. Tavss
26
= W3, N. Marky
30
= TH3, N. Marky
31
= TH3, E. Tavss
33
= M6, R. Porcja
34
= M6, R. Agarwal
37
= M8, R. Porcja
38
= W6, J. Waidlich
39 =
W8, J. Waidlich
The exam has 25 questions for credit and an additional one to check the color of
your exam booklet.
Please answer all 26 questions
on the OpScan sheet.
There is
no penalty for guessing.
At the end of the 80minute exam period, please hand in
only
this
top sheet and your OpScan form.
If you finish early, please do not
disturb your fellow students.
A proctor will check your pictureID, OpScan form
and signature
during
the exam. Exam scores and an exam curve will be posted as
soon as possible.
162 EXAM I V1
SPRING 2003
1
1.
For which one of the following conversions must you know the density of the solution?
A.
mass percent to molality
B.
mass percent to molarity
C.
mole fraction to mass percent
D.
mole fraction to molality
E.
volume percent to proof
2.
A solution is prepared from a complex inorganic salt of molar mass 317 by dissolving
4.76 g of the salt in 100 g of water. The boiling point of the solution is found to be
100.31 ºC and the boiling point elevation constant of water is 0.51 (in the usual units).
This complex salt in solution
A.
dissociates into 2 ions
B.
dissociates into 4 ions
C.
dissociates into 3 ions
D.
remains an undissociated molecule
E.
forms dimers
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View Full Document 162 EXAM I V1
SPRING 2003
2
3.
The rate law for the reaction CH
3
CHO(g)
→
CO(g) + CH
4
is 3/2 order in the reactant.
At a pressure of CH
3
CHO = 0.416 atm the rate is 3.79 x 10
3
atm/sec. The value of k is
(units not shown)
A.
6.07 x 10
3
B.
70.9
C.
165
D.
0.268
E.
1.41 x 10
2
4.
The reaction
2NOCl(g)
→
2NO(g) + Cl
2
(g) has been studied at 300.0 K and its
rate constant is 2.6 x 10
8
L/mol s and its activation energy is 98000 J/mol K.
The frequency factor for the reaction is
A.
1.2 x 10
8
B.
9.1 x 10
9
C.
4.6 x 10
9
D.
2.7 x 10
8
E.
3.0 x 10
9
5.
Alcohol A and alcohol B both have the same molar mass. A solution of the two that is
25% alcohol A by mass has a total vapor pressure
of 0.0900 atm. A solution of the two
that is 75% alcohol A by mass has a total vapor pressure
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This note was uploaded on 07/13/2008 for the course CHEM 162 taught by Professor Siegal during the Summer '08 term at Rutgers.
 Summer '08
 siegal

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