Hiram College, Chem. 161 Fall 2007
Chemistry 161
Final Exam
November 19 , 2007
Name:____________________________________
Part 1: Multiple Choice
Place the letter of the best answer in the space provided.
____1. An acid is defined as
A.
B.
C.
D.
E.
a sour tasting substance.
a proton donor.
a compound that makes H3O+ in water.
All of the above statements (A-C) describe an acid.
None of the above statements (A-C) describe an acid.
____2. A student mixed 4.6 g copper (II) sulfate in 49 mL of methanol. Which of the following
is true regarding the solvent and the solute.?
A.
B.
C.
D.
E.
Copper (II) sulfate is the solute and methanol is the solvent.
Copper (II) sulfate is the solvent and methanol is the solute.
Copper (II) sulfate is the solvent and the solute.
Methanol is the solvent the solute.
None of the above are true.
____3. 5.2  104 expressed in standard notation is written in the form
A.
B.
C.
D.
E.
52
520
5200
52000
520000
____4. Choose the answer that contains a metal, a non-metal and a metalloid.
A.
B.
C.
D.
E.
He, Al, Li
Cl, O, N
Ca, Si, C
K, As, Mg
B, S, Br
____5. How many electrons are in the valence shell of carbon?
A.
B.
C.
D.
E.
4
6
8
12
14
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Hiram College, Chem. 161 Fall 2007
____6. Alpha-linolenic acid, ALA, (pictured below) is an omega-3 fatty acid. Which of the
following is not true about ALA?
A.
B.
C.
D.
E.
ALA has a hydrophobic end and a hydrophilic end.
ALA has a carboxylic acid group.
ALA is a polyunsaturated compound.
ALA has a degree of unsaturation of 3.
ALA has London forces acting on it.
____7. Nuclear fusion is described as
A.
B.
C.
D.
E.
the process by which atoms are split on the nuclear level.
the process by which atoms are combined on the nuclear level.
the process by which atoms of opposite charges are combined.
the process by which neutral atoms share electrons.
the process by which abnormal atoms melt into new atoms.
____8. How many protons, neutrons and electrons are in 127-iodine?
A.
B.
C.
D.
E.
127 protons, 127 electrons, 127 neutrons
53 protons, 53 electrons, 53 neutrons
74 protons, 74 electrons, 74 neutrons
74 protons, 74 electrons, 53 neutrons
53 protons, 53 electrons, 74 neutrons
____9. Which of the following is true regarding the acid/base reaction below?
H2SO4 + NaOH  H2O + NaHSO4
A.
B.
C.
D.
E.
The acid/conjugate acid is H2SO4 / H2O.
The acid/conjugate base is H2SO4 / H2O.
The acid/conjugate acid is H2O / NaHSO4.
The acid/conjugate base is H2O / NaHSO4.
The base/conjugate base is H2SO4 / H2O.
____10. What volume of gas is occupied by 6.30 g of propane (C3H8) at 25.0oC and 1.15 atm?
A.
B.
C.
D.
E.
78.6 L
0.255 L
3.04 L
0.328 L
3.7 L
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Hiram College, Chem. 161 Fall 2007
____11. The half life of a radioactive element is described as
A.
B.
C.
D.
E.
The time it takes for half of the sample to increase.
The time it takes for half of the sample to decompose.
The time it takes for half of the sample to explode.
The time it takes for half of the sample to liquify.
The time it takes for half of the sample to regenerate itself.
____12. A gas is compressed from 7.6 L to 5.2 L. The final pressure is 13.5 atm. What was the
original pressure?
A.
B.
C.
D.
E.
2.9 atm
3.0 atm
6.8 atm
9.2 atm
19 atm
____13. What is the maximum number of electrons available to an element in the second period?
A.
B.
C.
D.
E.
2
8
10
12
18
____14. The correct Lewis Structure for CCl4 is
A.
B.
C.
D.
E.
____14. Avagadro’s number is
A.
B.
C.
D.
E.
6.92  1024
6.00  10-23
6.02  1023
6.02  10-23
2.02  1023
____15. What is the molecular weight of 2,3,4,5-tetramethylhexane?
A.
B.
C.
D.
E.
128 amu
132 amu
136 amu
142 amu
150 amu
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Hiram College, Chem. 161 Fall 2007
____16. Concentrated hydrochloric acid is 12 M. What volume of concentrated hydrochloric
acid is required to make 750 mL of a 2.5 M solution?
A.
B.
C.
D.
E.
0.156 mL
1.56 mL
15.6 mL
156 mL
1560 mL
____17. How many moles are there in 92 mg of glucose (C6H12O6)?
A.
B.
C.
D.
E.
5.1 mol
0.51 mol
0.051 mol
0.0051 mol
0.00051 mol
____18. A sample of 15.0 L of ammonia (NH3) gas at 5.0oC is heated under constant pressure to
a volume of 20.0 L. What is the final temperature?
A.
B.
C.
D.
E.
3.8oC
6.7oC
7.5oC
8.4oC
9.5oC
____18. The most electronegative element on the periodic table is
A. F
B. Cs
C. Fr
D. H
E. He
____19. Two properties that affect the state of matter of a compound are
A. temperature and pressure
B. temperature and volume
C. volume and pressure
D. volume and density
E. mass and volume
____20. The w/v % of a solution made from 0.425 mol of sodium nitrate in 185 mL of water is
A.
B.
C.
D.
E.
12.3 %
16.4 %
18.6 %
19.5 %
21.6 %
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Hiram College, Chem. 161 Fall 2007
____21. Which of the following best describes the combustion of a compound?
A.
B.
C.
D.
E.
A physical change.
A chemical change.
A physical property.
A chemical property.
None of these describe combustion.
____22. Complete the following equation:
A.
B.
C
.
D.
E
.
____23. Which of the following represents a balanced equation?
A.
B.
C.
D.
E.
PCl5 + 4 H2O  5 H3PO4 + 3 HCl
2 PCl5 + 4 H2O  2 H3PO4 + 3 HCl
PCl5 + 4 H2O  4 H3PO4 + 5 HCl
PCl5 + 4 H2O  H3PO4 + 5 HCl
PCl5 + 5 H2O  H3PO4 + 5 HCl
____24. London forces are described as
A.
B.
C.
D.
E.
weak intermolecular forces.
the result of instantaneous dipole moments.
forces that are hard to break resulting in high melting points.
A and B
A and C
____25. What grade do you think you’ll get in this class?
A.
B.
C.
D.
E.
A
B
C
D
F
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Hiram College, Chem. 161 Fall 2007
Part 2 Matching
Place the letter of the description in column 2 with the best item in column 1.
Column 1
Column 2
____Gravy*
a. Pure substance
____Melting candles
b. An organic compound
____Table salt
c. Physical change
____Protein from turkey
d. Chemical change
____Turkey dressing
e. Ionic compound
____Water
f. Homogeneous mixture
____Cooking turkey
g. Heterogeneous mixture
* Gravy made from broth that was properly strained and from a proper rue so that it is free of
lumps.
Part 3 Short Answer
Write the answers to the following questions in the space provided. If doing a calculation, be
sure to show all your work for full credit.
1. Consider the chemical reaction :
MW (g/mol)
Zn + 2 HCl
65.38
36.46

ZnCl2 + H2
136.23
2.02
If 6.98 g Zn is reacted with 25 mL of 3.00 M HCl to produce H2 gas, what is the limiting reagent?
2. Circle the two ends of the following amino acids that react to form a peptide bond.
Arginine
Isoleucine
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Hiram College, Chem. 161 Fall 2007
3. Tell whether the following vitamins are lipid soluble or water soluble.
4. A student was taken to the urgent care center after eating dinner in the college
cafeteria. The driver was traveling at 78 mi/h.
a. The urgent care center was 16 km from the college. How long did it take the
student to get there from the college? (1 mi = 1.609 km)
b. Normal body temperature is 98.6F. The student’s temperature was
39.8C. Did the student have a fever?
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Hiram College, Chem. 161 Fall 2007
c. The student was found to have an E. coli infection and was administered amoxicillin
(pictured below). Circle and label the functional groups.
d. The antipyretic (a drug that lowers body temperature) acetaminophen was
prescribed with a dosage of 50 mg/kg three times a day. The student weighed
137 lb. How much acetaminophen should the student take in a day?
(1 lb = 0.454 kg)
5. Draw 3 isomers with the formula C4H9Br.
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