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Sample for Final Exam - General Chemistry I | CHEM 1010, Exams of Chemistry

Material Type: Exam; Class: General Chemistry I; Subject: Chemistry; University: Xavier University of Louisiana; Term: Spring 2000;

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Chem 1010 3rd Sample for Final Exam Updated by JWC, 12/02
Questions 1-23 are worth 6 points each. Place your answer on the FRONT side of the Scantron
sheet in the space corresponding to the question number.
You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.
When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and
waiting until you have completely finished before checking your answers.
•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
1: A 4.90 g sample of potassium bromide is reacted with 11.7 g of silver (I) nitrate to form silver (I) bromide and
potassium nitrate. How many grams (theoretical yield) of silver (I) bromide are formed?
A: 6.48 g B: 38.7 g C: 3.87 g D: 0.0300 g E: 7.74 g
2: A sample of gas which occupies 6.00*102 mL is altered so that its pressure doubles and its temperature (in K)
increases by a factor of three. What is the volume of the gas after these alteratons?
A: 3.60*103 mL B: 1.80*103 mL C: 4.00*102 mL D: 9.00*102 mL E: 1.00*102 mL
3: Which of the following represents the best Lewis structure for CH3CH2NO2 ?
A:
C = O
O
N
H
H
H
H
H
C
O
C O
N
H
H
H
H
H
C
=
B:
C = = O
O
N
H
H
H
D.
O
C = O
N
H
H
H
H
H
C
=
C:
C O
O
N
H
H
H
H
H
C
E.
C = O
O
N
H
H
H
H
H
C
4: 1.5*102 milliliters of 2.0 M sodium hydroxide is diluted to 5.0*102 milliliters with water. What is the concentration
of the solution after dilution?
A: 0.60 M B: 3.3 M C: 1.7 M D: 0.33 M E: 0.30 M
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On special offer

Partial preview of the text

Download Sample for Final Exam - General Chemistry I | CHEM 1010 and more Exams Chemistry in PDF only on Docsity!

Questions 1-23 are worth 6 points each. Place your answer on the FRONT side of the Scantron

sheet in the space corresponding to the question number.

You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.

When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and

waiting until you have completely finished before checking your answers.

1: A 4.90 g sample of potassium bromide is reacted with 11.7 g of silver (I) nitrate to form silver (I) bromide and

potassium nitrate. How many grams (theoretical yield) of silver (I) bromide are formed?

A: 6.48 g B: 38.7 g C: 3.87 g D: 0.0300 g E: 7.74 g

2: A sample of gas which occupies 6.00*

mL is altered so that its pressure doubles and its temperature (in K)

increases by a factor of three. What is the volume of the gas after these alteratons?

A: 3.60*

mL B: 1.80*

mL C: 4.00*

mL D: 9.00*

mL E: 1.00*

mL

3: Which of the following represents the best Lewis structure for CH 3

CH

NO

A:

C = O

O

H N

H

H

H

H

C

O

H C^ N O

H

H

H

H

C

B:

C = = O

O

H N

H

H

D.

O

H C^ N= O

H

H

H

H

C

C:

C O

O

H N

H

H

H

H

C

E.

C = O

O

H N

H

H

H

H

C

milliliters of 2.0 M sodium hydroxide is diluted to 5.0*

milliliters with water. What is the concentration

of the solution after dilution?

A: 0.60 M B: 3.3 M C: 1.7 M D: 0.33 M E: 0.30 M

Questions 1-23 are worth 6 points each. Place your answer on the FRONT side of the Scantron

sheet in the space corresponding to the question number.

You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.

When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and

waiting until you have completely finished before checking your answers.

5: How many mL of 0.29 M phosphoric acid are needed to completely neutralize 100.0 mL of 0.16 M sodium hydroxide?

A: 1.0 x 10

mL B: 1.8 x 10

mL C: 6.0 x 10

mL D: 1.7 x 10

mL E: 5.5 x 10

mL

6: Given the following standard bond dissociation enthalpies in kJ/mole,

Bonds with Carbon Bonds w/H Bonds w/N Other Bonds

C-Br 219 C-I 240 H-Br 324 N-Br 250 Br-Br 193

C-C 350 C=N 615 H-Cl 431 N-Cl 190 Cl-Cl 242

C=C 614 C=N 891 H-F 567 N-F 280 F-F 155

C=C 839 C-O 358 H-H 435 N-I 150 I-I 151

C-Cl 330 C=O 799 H-I 299 N-N 160 O-O 146

C-F 485 C=S 477 H-N 390 N=N 946 O=O 495

C-H 413 H-O 463

H-S 370

what is the enthalpy change for the reaction, 3 HI + 1 CH 4

➞ 3 H

+ 1 CHI

? (Note: In CHI 3

, C is the central

atom)

A: -373 kJ B: 383 kJ C: 111 kJ D: - 383 kJ E: -111 kJ

7: What is the density of dinitrogen pentoxide gas at 81˚C and 286 torr?

A: 6.1 g/L B: 11 g/L C: 1.4 g/L D: 0.11 g/L E: 0.72 g/L

Questions 1-23 are worth 6 points each. Place your answer on the FRONT side of the Scantron

sheet in the space corresponding to the question number.

You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.

When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and

waiting until you have completely finished before checking your answers.

12: When glucose (C 6

H

O

) burns according to the equation C 6

H

O

(s) + 6 O 2

(g) ➞ 6 CO 2

(g) + 6 H 2

0(l) ,

2802 kJ are released. On the basis of this information, how many grams of carbon dioxide are produced when 47 kJ are

released?

A: 0.74 g B: 0.23 g C: 1.4 g D: 4.4 g E: 2.2 g

13: When ClO 3

+ I

➞ Cl

+ I

(acidic solution) is balanced, the sum of all coefficients is:

A: 11 B: 18 C: 20 D: 26 E: 30

14: 9 moles of O 2

and 7 moles of N 2

are placed in a container and allowed to react according to the equation,

3 O

+ 2 N

➞ 2 N

O

what is the maximum number of moles of N 2

O

which can form?

A: 9 B: 7 C: 6 D: 1 E: 4

15: Calculate the heat change when 52.8 grams of water is cooled from 106

o C to 47

o C.

A: -1.20*

kJ B: -1.31*

kJ C: -1.31*

kJ D: -1.20*

kJ

E: -7.3 kJ

16: How many grams of potassium permanganate are required to prepare 432 mL of 0.540 M solution?

A: 33.1 B: 198 C: 85.3 D: 678.3 E: 36.

Questions 1-23 are worth 6 points each. Place your answer on the FRONT side of the Scantron

sheet in the space corresponding to the question number.

You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.

When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and

waiting until you have completely finished before checking your answers.

17: Given: 1 O(g) + 1 e

➞ 1 O

(g) DH = -135 kJ

1 O(g) + 2 e

➞ 1 O

(g) DH = 710 kJ

On the basis of this information, calculate the heat change for the reaction

1 O

(g) + 1 e

➞ 1 O

(g) (6-8)

A: 575 kJ B: 845 kJ C: 440 kJ D: -575 kJ E: -845 kJ

18: If 12 moles of X and 10 moles of Y are mixed and allowed to react according to the equation,

3 X + 1 Y ➞ 2 Z, how many moles of Y are in the container when 3 moles of X remain?

A: 0 B: 7 C: 3 D: 1 E: 9

19: What is the molecular weight of a gas if 0.60 g of the substance occupies 200 mL at 27 ˚C and

763 torr?

A: 87 B: 74 C: 81 D: 6.6 E: 7.

20: Calculate the enthalpy change for the following reaction.

2 CuS (s) + 3 O 2

(g) ➞ 2 CuO (s) + 2 SO 2

(g)

A: –8.06*

kJ B: –1.000*

kJ C: –4.03*

kJ D: 8.06*

kJ E: 4.03*

kJ

Questions 51-82 are worth 3 points each. Twenty-four of these types of questions will appear

on the final exam. Place your answer on the BACK side of the Scantron sheet in the space

corresponding to the question number.

You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.

When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and

waiting until you have completely finished before checking your answers.

51: K-TYPE answer format: Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: Cobalt is a transition metal.

B: Chlorine, xenon, and krypton are gases under normal conditions.

C: Oxygen, chlorine, and nitrogen are diatomic under normal conditions.

D: Lithium and magnesium are in the same group of the periodic table.

52: K-TYPE answer format: Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: If the empirical formula of a certain compound is CH and its molecular weight is 52, the molecular formula of

the compound wold be C 4

H

B: Covalent bonding is bonding in which electrons are shared.

C: Cesium would be expected to form a +1 ion in ionic compounds.

D: If potassium reacts with fluorine, a covalent compound would result.

53: Choose the correct statements regarding

K

using K-TYPE answer format: Mark a if A,B,C are correct; b if

A, C; c if B, D; d if D only; e otherwise.

A: The species contains 41 protons.

B: The species contains 19 electrons.

C: The species contains 19 neutrons.

D: The approximate mass of the species would be 41 amu.

Questions 51-82 are worth 3 points each. Twenty-four of these types of questions will appear

on the final exam. Place your answer on the BACK side of the Scantron sheet in the space

corresponding to the question number.

You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.

When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and

waiting until you have completely finished before checking your answers.

54: Identify the equations which correctly match reactants and products without regard to whether the equations are balanced

using K-TYPE answer format. (Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e

otherwise.) (Note: States, if given, are correct.)

A: K + H

O ➞ KOH + H

O

B: NaOH + CH 3

COOH ➞ NaCH 3

COO + OH

C: C

H

OH + O

➞ CO

+ H

D: Sr(OH) 2

(aq) + MnCl 2

(aq) ➞ Mn(OH) 2

(s) + SrCl 2

(aq)

55: K-TYPE answer format: Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: The oxidation number of Cl in ClO 3

is +3.

B: Hydrogen usually has an oxidation number of -2 in compounds.

C: The oxidation number of S in Na 2

SO

is +4.

D: The oxidation number of F in F 2

(g) is 0.

56: K-TYPE answer format : Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: The average kinetic energy of gas molecules at 35

o C is less than that of the same sample at 70

o C.

B: If volume and amount of a substance are held constant, the temperature (in K) and pressure of a gas are directly

proportional.

C: The average velocity of the molecules of hydrogen gas would be greater than that of oxygen gas at the same

temperature.

D: A gas at 60

o C and 4 atm would be less likely to obey the ideal gas equation than would the same gas at 60

o C

and 5 atm.

Questions 51-82 are worth 3 points each. Twenty-four of these types of questions will appear

on the final exam. Place your answer on the BACK side of the Scantron sheet in the space

corresponding to the question number.

You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.

When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and

waiting until you have completely finished before checking your answers.

60: K-TYPE answer format : Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: The energy of a photon of electromagnetic radiation is directly proportional to its frequency.

B: After an atom is heated to a very high temperature, it emits a continuous spectrum as the electrons return to the

lowest energy level.

C: The frequency of radio waves is less than that of x-rays.

D: Electron in an atom behaves only like a wave.

61: K-TYPE answer format: Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: An electron in a 4s orbital is farther from the nucleus than one in a 2p orbital.

B: An electron in a 4s orbital has less energy than one in a 2p orbital.

C: Energy is released if an electron moves from the n = 5 to the n = 3 level.

D: The spin quantum number s is related to the orbital's orientation.

62: Choose the correct statements from the following concerning NO

and NO

using K-TYPE answer format :

Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: The atoms would be more difficult to separate in NO

than in NO

B: There is a single bond in NO

C: There is a triple bond in NO

D: The atoms are further apart in NO

than in NO

63: K-TYPE answer format : Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: F

ion is larger than an F atom.

B: Sr atom is smaller than a Ba atom.

C: Ge atom is larger than a Br atom.

D: Li

ion is larger than a Li atom.

Questions 51-82 are worth 3 points each. Twenty-four of these types of questions will appear

on the final exam. Place your answer on the BACK side of the Scantron sheet in the space

corresponding to the question number.

You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.

When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and

waiting until you have completely finished before checking your answers.

64: K-TYPE answer format: Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: The general electron configuration of the fluorine group is ns

np

B: A 4d subshell may contain a maximum of 10 electrons.

C: An element with an electronic configuration of 1s

2s

2p

would be in the same group as carbon.

D: A magnesium atom needs to lose two electrons to have a filled outer shell.

65: K-TYPE answer format : Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: An Al atom would be diamagnetic.

B: Ca and P are isoelectronic.

C: The elements with atomic numbers 6 and 15 would have similar chemical properties.

D: Atoms with all electrons paired are not attracted into magnetic fields.

66: K-TYPE answer format : Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: A bond formed by the attraction of oppositely charged particles is called an ionic bond.

B: If rubidium (Rb) were to react with oxygen, the resulting compound would have ionic bonding.

C: Ionic compounds tend to have high melting points.

D: If Cs were to react with oxygen, the formula of the resulting compound would be CsO.

67: What is the correct electronic configuration of Se?

A: 1s

2s

2p

3s

3p

4s

3d

4p

B: 1s

2s

2p

3s

3p

4s

3d

C: 1s

2s

2p

3s

3p

4s

3d

4p4 D: 1s

2s

2p

3s

3p

4s

3d

4p

E: 1s

2s

2p

3s

3p

3d

4p

Questions 51-82 are worth 3 points each. Twenty-four of these types of questions will appear

on the final exam. Place your answer on the BACK side of the Scantron sheet in the space

corresponding to the question number.

You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.

When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and

waiting until you have completely finished before checking your answers.

72: K-TYPE answer format : Mark a if A, B, C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: Amorphous solids tend to break with smooth edges and faces.

B: In a metallic solid, the metal atoms tend to pack so as to leave the smallest possible amount of empty space.

C: When comparing compounds with similar molecular weights, hydrogen bonding is weaker than London

dispersion (induced dipole-induced dipole) forces.

D: Viscosity increases as intermolecular forces increase.

73: K-TYPE answer format : Mark a if A, B, C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: Water has a higher melting point than expected when compared to similar compounds.

B: The boiling point is the temperature at which the vapor pressure of the liquid state equals the external pressure.

C: HF has a higher melting point than expected compared to similar compounds due to hydrogen bonding.

D: The attraction of a hydrogen atom to a small, electronegative atom to which it is covalently bonded is called

hydrogen bonding.

74: What is the density (in g/mL) of a substance if 42.8 grams of it occupies 13.5 mL?

A: 3.15*

g/mL B: 5.78*

g/mL C: 3.17*

g/mL D: 1.12*

g/mL E: 1.68*

g/mL

75: If barium reacts with oxygen, the formula of the compound formed is likely to be

A: BaO B: Ba 2

O C: BaO 2

D: Ba 2

O

E: Ba 3

O

Questions 51-82 are worth 3 points each. Twenty-four of these types of questions will appear

on the final exam. Place your answer on the BACK side of the Scantron sheet in the space

corresponding to the question number.

You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.

When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and

waiting until you have completely finished before checking your answers.

76: K-TYPE answer format: Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: 52

Cr is an isotope of

Mn.

B: The nucleus of the atom contains all of its neutrons.

C: The mass of the electron is approximately -1 amu.

D: The charge on the electron is -1.

77: Choose the correct answers from the following using K-TYPE format where X = 50 and Y = 200 on the diagram

below.

0 X 2X 3X 4X 5X

8Y torr-

7Y torr-

6Y torr-

5Y torr-

4Y torr-

3Y torr-

2Y torr-

Y torr-

P r e s s u r e

Temperature ( C)

o

K-TYPE answer format:

•Choose a if A, B, and C are correct.

•Choose b if A and C are correct.

•Choose c if B and D are correct.

•Choose d if D only is correct.

•Choose e if any other pattern is correct.

• C

• D

• E

F •

A • • B

• G

• H

I •

• J

K •

• L

M •

A: The normal boiling point of the substance is approximately 82 ˚ C.

B: The normal melting point of the substance is about 38 ˚ C.

C: The substance is a solid at 1000 torr and 150 ˚ C.

D: The boiling point of the substance at 600 torr is approximately 142 ˚ C.

Questions 51-82 are worth 3 points each. Twenty-four of these types of questions will appear

on the final exam. Place your answer on the BACK side of the Scantron sheet in the space

corresponding to the question number.

You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.

When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and

waiting until you have completely finished before checking your answers.

82: K-TYPE answer format : Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.

A: If oil is mixed with water, the result is a solution.

B: If water is added to a solution with a concentration of 1.2 M, the concentration of the solutions increases.

C: One mole of krypton would occupy more space than would 1 mole of radon at the same temperature and

pressure.

D: According to the kinetic molecular theory of gases, the molecules of a gas are in constant random motion.