Recitation Worksheet 4 - Exam 1 Review v1 Key
pdf
keyboard_arrow_up
School
University Of Georgia *
*We aren’t endorsed by this school
Course
1212
Subject
Chemistry
Date
Apr 3, 2024
Type
Pages
17
Uploaded by SargentKomodoDragon4252
1 Recitation Worksheet 4: Exam 1 Review Name MyID Instructions: 1. This recitation worksheet is for the exam 1 review. 2. You do not need to submit it to Gradescope. 3. The answer key has been posted with this worksheet to eLC. 4. The recitation in the exam week (February 5
–
8) is still mandatory. The attendance will be recorded. 5. A periodic table and formula sheet are included at the end of this worksheet. Chapter 10 –
Liquids and Solids 1. Select all the compounds which would be expected to form hydrogen bonds in their pure liquid state: (Answer with letters, and no commas or spaces) A. CH
3
OCH
3
B. C
3
H
8
C. HF D. CH
3
CO
2
H E. CO
2
F. (C
2
H
5
)
2
CClOH 2. Which statements about intermolecular forces are true? (Select all that apply.) A.
Hydrogen boding occurs between any molecule that has H
B.
The strength of London dispersion forces depends on the size and the polarizability of an atom or molecule.
C.
Dipole-induced dipole interaction occurs between polar and nonpolar molecules
D.
London dispersion forces only occur in nonpolar molecules
E.
Ionic and covalent interactions are also considered as intermolecular interactions
3. Boiling points of four different liquids are given below. The possible liquids are C
6
H
6
, C
6
H
5
Br, C
6
H
5
OH, and C
6
H
5
Cl. Assign the given compound letter to the corresponding liquid according to their boiling points. Liquid Boiling Point (
o
C) W 80 X 132 Y 156 Z 182 A. W= C
6
H
5
OH, X= C
6
H
5
Br, Y= C
6
H
5
Cl, Z= C
6
H
6
B. W= C
6
H
5
Cl, X= C
6
H
5
Br, Y= C
6
H
5
OH, Z= C
6
H
6
C. W= C
6
H
5
OH, X= C
6
H
5
Cl, Y= C
6
H
6
, Z= C
6
H
5
Br D. W= C
6
H
6
, X= C
6
H
5
Cl, Y= C
6
H
5
Br, Z= C
6
H
5
OH E. W= C
6
H
6
, X= C
6
H
5
Br, Y= C
6
H
5
Cl, Z= C
6
H
5
OH
2 4. Which is the correct order of boiling points for BaCl
2
, H
2
, CO
2
, HF, Ne, SO
2
? A. HF > BaCl
2
> SO
2
> CO
2
> Ne > H
2
B. HF > BaCl
2
> CO
2
> SO
2
> Ne > H
2
C. BaCl
2
> HF > SO
2
> CO
2
> Ne > H
2
D. H
2
> Ne > CO
2
> SO
2
> HF > BaCl
2
E. BaCl
2
> HF > CO
2
> SO
2
> Ne > H
2
5. Which statement(s) is/are false about viscosity and surface tension? Select all that apply. A. Both viscosity and surface tension decrease with increasing temperature B. As intermolecular forces increase, viscosity increases but surface tension decreases C. Viscosity depends on molecular size and shape D. Ethylene glycol (HOCH
2
CH
2
OH) has lower surface tension and viscosity compared to water E. All the above statements are false 6. Rank the compounds in order of increasing viscosity. A. HOCH
2
CH
2
OH B. CH
3
OCH
3
C. CH
3
CH
2
OCH
3
CH
2
D. CH
3
CH
2
OH E. C
2
H
6
7. CCl
4
is a (nonpolar/polar) molecule which has (London dispersion forces/ dipole-dipole interactions) as intermolecular interactions. CHCl
3
is (nonpolar/polar) molecule which has (London dispersion forces/dipole-dipole interaction/ both London dispersion and dipole-dipole interactions). The boiling point of CCl
4
is (higher/lower) than the boiling point of CHCl
3
because the London dispersion forces are (higher/lower) molar mass of a CCl
4
than CHCl
3
. (stronger/weaker) in CCl
4
due to the 8. Which of these describes the changes in forces of attraction that occur as H
2
O changes phase from a liquid to a vapor? A. H
—
O bonds break as H
—
H and O
—
O bonds form B. Hydrogen bonds between H
2
O molecules are broken C. Covalent bonds between H
2
O molecules are broken D. Ionic bonds between H
+
ions and OH
-
ions are broken E. Covalent bonds between H
+
ions and H
2
O molecules become more effective
3 9. Under what conditions does capillary action occur? A. When the cohesive forces are greater than the adhesive forces B. When the cohesive and adhesive forces are equal C. When the cohesive forces are weaker than the adhesive forces D. All of the answers are correct E. None of the answers are correct 10. Which statement(s) below are correct regarding CBr
4
and CCl
4
? (Select all that apply.) A. CBr
4
is more volatile than CCl
4
B. CBr
4
has a higher boiling point than CCl
4
C. CBr
4
has weaker intermolecular forces than CCl
4
D. CBr
4
is has a lower vapor pressure than CCl
4
E. All the above statements are correct 11. Select the pair of compounds in which the substance with the higher vapor pressure at a given temperature is listed first A. C
7
H
16 and C
5
H
12
B. SiH
4
and GeH
4
C. H
2
O and H
2
S (H-S bonds are non-polar) D. CH
3
CH
2
OH and H
3
COCH
3
12. The heat of vaporization of hexane is 30.8 kJ/mol. The boiling point of hexane at a pressure of 1.00 atm is 68.9 °C. What is the boiling point in K be at a pressure of 0.50 atm? Keep 2 significant figures. K 13. What is the heat of vaporization of a compound that has a vapor pressure of 120 mm Hg at 12.3°C and a vapor pressure of 250 mm Hg at 43.6 °C? A. 12.28 kJ/mol B. 25.2 kJ/mol C. 11.32 kJ/mol D. 43.6 kJ/mol E. 17.62kJ/mol
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
4 14. Equilibrium vapor pressure of benzene (C
6
H
6
) at various temperatures are given below. Keep 3 significant figures. Temperature (°C) Vapor Pressure (mmHg) 7.6 40. 26.1 100. 60.6 400. 80.1 760. A. What is the normal boiling point of benzene? °C B. Calculate the molar enthalpy of vaporization of benzene in kJ/mol using the normal boiling point and the vapor pressure value of 400. mmHg at 60.6 °C. kJ/mol 15. Assign the appropriate labels to the phase diagram shown below. A. A = liquid, B = solid, C = gas, D = critical point B. A = gas, B = solid, C = liquid, D = triple point C. A = gas, B = liquid, C = solid, D = critical point D. A = solid, B = gas, C = liquid, D = triple point E. A = liquid, B = gas, C = solid, D = critical point 16. Refer to the phase diagram in question 15. If you start at 0.75 atm and 0 °C, and move to 0.10 atm and 25 °C, you will move from the phase to the phase.
5 17. According to the phase diagram shown below, what is the normal boiling point in °C? A. 10 B. 20 C. 30 D. 40 E. 50 18. Match the items below with each of the following statements: I. Covalent network solids II. Metals III. Intermolecular forces IV. Ionic bonding A. High mobility of electrons throughout the solid B. Network of covalent bonds C. Attractive forces that exist in molecular crystals D. Type of bonding in CaI
2
E. High melting point and poor electrical conductivity 19. Which of these forms a molecular solid? A. CaO B. C
10
H
22
C. C, graphite D. Gold 20. Label each of the unit cells below (Insert FCC for face-center cubic; BCC for body-center cubic; or simple cubic)
6 21. Match the terms below with the statements. (Crystalline solids CS, Amorphous solids AS, Unit cell UC, Crystal lattice CL, Body centered cubic BCC, Face centered cubic FCC, Simple cubic SC) (Answer with the letters not the names). A. A cubic unit cell has four atoms per unit cell: B. The smallest repeating unit in the crystal lattice: C. A unit cell that has an atom in the body: D. NaCl and Glucose belong to this category: E. The atoms in this unit cell have a coordination number of 6: 22. Which of the ionic compound would you expect to have the highest melting point? A. KBr B. LiF C. MgO D. NaCl E. CaCl
2
23. What type of solid will each of the substances form in its solid state? Choices to consider are metallic
, ionic
, network
, or molecular solids. A. C
3
H
9
B. MgO C. Fe D. C (diamond) E. NaNO
3
F. Al
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
7 24. Which of the following statements regarding crystalline solids is true
? I. Molecules or atoms in molecular solids are held together via ionic bonds. II. Metallic solids have atoms in the points of the crystal lattice. III. Ionic solids have formula units in the point of the crystal lattice. IV. Molecules in covalent-network solids are connected via a network of covalent bonds. A. I B. II C. III D. IV E. None of the above statements are true. Chapter 12 –
Chemical Kinetics 25. The average rate of disappearance of A
2
in the reaction A
2
+ B
3
→
AB
2
(unbalanced) is found to be0.235 M/s over a certain interval of time. What is the rate of disappearance of B
3
during this interval? M/s 26. For the reaction 3A + 5B →
3C + 2D, at a particular instant in time, the rate of change of C is 0.0566 M/s. What is the rate of change of B?
27. Consider the following rate law: Rate = k[A]
m
[B]
n
. How are the exponents m and n determined? A. by using the balanced chemical equation B. by using the subscripts for the chemical formulas C. by using the coefficients of the chemical formulas D. by educated guess E. by experiment 28. For a reaction A + B + C →
P, the following initial rate data were obtained: A B C rate I 0.10 M 0.10 M 0.10 M 0.15 M
/sec II. 0.10 M 0.20 M 0.10 M 0.30 M
/sec III. 0.20 M 0.20 M 0.10 M 0.60 M
/sec IV. 0.40 M 0.20 M 0.20 M 1.20 M
/sec A. What is the rate law? Rate = B. What is the order of this reaction? (answer 0, 1, or 2) C. What is the unit of the rate constant k
?
7
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
8 D.
What is the numerical value of k?
29.
The rate expression for a particular reaction is rate = k
[A]
2
[B]
3
. If the initial concentration of B is
increased from 0.1 M to 0.2 M
, the initial rate will increase by which of these factors?
A. 2
B. 3
C. 6
D. 8
E. 9
30.
The reaction 3A + 4B →
P is second order in A and first order in B. What is the rate law for this
reaction?
31.
The reaction A →
P is first order. The rate constant k is 0.21 s
−
1
. If the concentration of A is 0.45 M at
the end of 45 seconds, what is the initial concentration of A? Keep 2 significant figures.
M 32.
A first-order reaction has 25% reactant left at the end of 50 seconds. Keep 2 significant figures.
A.
What is the length of the half-life of this reaction?
Seconds B.
For the reaction above, if the initial concentration is 0.44 M, what is the concentration after 90 seconds?
M
9 33. A first-order reaction has 1/3 reactant left at the end of 60 seconds. What is the length of the half-life of this reaction? Keep 2 significant figures. Seconds 34. Experiment shows that the reaction below is first order: A →
P Answer the questions based on the kinetic information in the table. Keep 2 significant figures. Time (s) ln[A] 1.0 –
1.659 2.0 –
2.209 A. What is the numerical value of the rate constant for this reaction? M B. What was the initial concentration of A? M C. What would the concentration of A be after 4.0 seconds? Sec. D. What is the half-life (in seconds) for this reaction?
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
10 35. The kinetics of the reaction 2A →
P is studied. It is in second order and the rate constant is 0.132 M
−
1
s
−
1
. If the initial concentration of A is 0.50 M, what is the concentration of A at the end of 3 minutes? Keep 2 significant figures. M 36. The reaction A → B
+ C is second order in A. When [A]
0
= 0.300 M, the reaction is 40.0% complete in 45.0 minutes. Calculate the value of the rate constant. Keep 3 significant figures. M
−
1
min
−
1 37. The reaction A →
B + C is known to be zero order in A with a rate constant of 0.033 M/s at 25°C. An experiment was run at 25°C where [A]
0
= 0.95 M. Keep 2 significant figures. M A. What is [A] after 20 seconds? M B. What is [B] after 20 seconds?
11 38. For reaction A + B →
C + D, see the potential energy diagram below to answer the questions: A. Which letter shows the change in energy for the overall reaction? B. Which letter shows the activation energy without a catalyst? C. Which letter shows the activation energy with a catalyst? 39. Determine the activation energy for the reaction. Keep 2 significant figures. Temperature (°C) Rate Constant (M
−
1
s
−
1
)
330 0.98 550 1.60 E
a
=
12 40. What is the rate law for the reaction S
2
O
8
2-
(aq) + 3 I
-
(aq) ⟶
2 SO
4
2-
(g) + I
3
-
(aq)? Experiment [S
2
O
8
2-
] [I
-
] Initial Rate (M/s)
1 0.25 0.25 4.0 x 10
1 2 0.50 0.50 3.2 x 10
2 3 0.50 0.75 7.2 x 10
2 Rate = k [S
2
O
8
2-
] [I
-
] 41. The three-step mechanism for a reaction is provided for a reaction: 39. provided for a reaction: Cl
2
(g) ⇌
2 Cl(g) Cl(g) + CHCl
3
(g) ⟶
HCl(g) + CCl
3
(g) Cl(g) + CCl
3
(g) ⟶
CCl
4
(g) A. What is the overall equation for this reaction? k
1
k
2
k
3
k
4
Fast Slow Fast
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
13 B. Which species are the intermediates in this reaction? Select all that apply. C. What is the predicted rate law for this reaction?
14 42. A mechanism has been proposed for the formation of a double helix DNA is given by: S1 + S2 ⇌
(S1:S2) Fast (S1:S2) ⟶
S1-S2 Slow If S1 and S2 represent strand 1 and strand 2 respectively, which of the statements are true
? Select all that apply. A. (S1:S2) represent the reaction intermediate in the mechanism. B. The rate for the formation of the DNA strand can be written as rate = k [S1][S2]. C. The rate for the formation of the DNA strand can be written as rate = k [(S1+S2)]. D. The second step in the mechanism is the rate determining step. E. The activation energy of the fast first step is higher and therefore it has a lower rate constant compared to the second slow step.
Related Documents
Related Questions
15 of 16
I Review | Constants | Periodic Table
Part A
H O
|||
CH3-C-N-CH2-CH3
Spell out the full name of the compound.
Submit
Request Answer
Part B
CH3-CH2-CH2
C-NH2
Spell out the full name of the compound.
Pearson
carson Education Inc. All rights reserved.| Terms of Use | Privacy Policy | Permissions | Contact Us |
12:14 AM
xpジC
10/29/2020
PrtSc
Delote
F10
08.
arrow_forward
A. Calculations for the Determination of Ammonium Chloride
The data from the data entry portion of the report has been copied into this section of the report
for your convenience. Use the data to make the necessary calculations.
38.478 g
[1] Mass of evaporating dish #1:
[2] Mass of evaporating dish and original sample (g):
39.383 g
Mass of original sample (g)
[3] Mass of evaporating dish after subliming NH4 (g):
39.265 g
Mass of NH,CI (g)
Percent of NH,CI (%)
arrow_forward
A System
15%
Part i
Screenshot saved
Tap to view your screenshot
SHARE
EDIT
DELETE
Part 2
3 compounds with elements
from groups 2A and 7A
Part 2
•.
5-6 / 10
Chemical
Compound
Cation
Anion
formula
name
Part 3
:::
arrow_forward
8.
HMAC=5083dd0d4d151e83553557f162ba7724#10301
11 of 16
I Review | Constants | Periodic Table
Submit
Request Answer
Part C
CH3
H;C CH2 N CH2 CH3
Spell out the full name of the compound.
Submit
Request Answer
Next >
Provide Feedback
P Pearson
arson Education Inc. All rights reserved. Terms of Use | Privacy Policy | Permissions | Contact Us |
12:14 AM
xp ツ
10/29/2020
Backapace
arrow_forward
(please type answer)
arrow_forward
21.
ADLC Assignment Booklet A3
Decide whether each statement is true (T) or false (F). Place your answer in
the blank space given.
Scientific theory states that the atoms in today's plastics
were parts of microscopic plants and animals that lived in the
oceans millions of years ago.
b. Molecules of gasoline have more carbon atoms than do
molecules of diesel fuel.
c. Subjecting large molecules to cracking is useful because
smaller molecules are manipulated more easily in a reaction to
produce a desired product.
d. Unsaturated compounds form during hydrocarbon cracking
because too many hydrogen atoms are available for the
number of carbon atoms.
arrow_forward
Help
arrow_forward
1) CH
2) H2
(POLYATOMIC IONS):
3) NH,
11) OH (hydroxide ion)
12) SO, (sulfate ion)
13) PO, (phosphate ion)
4) Oz
5) N2
6) HCN
7) CH,0
8) CH,
9) C,H,
10) C,H,
IMG 6433 jpg
arrow_forward
just need to know how to do part A so i can do the rest!
arrow_forward
I need help please.
arrow_forward
Lewis Structure, Molecular Shape, and
Molecular Polarity Lab
Instructions:
For each molecule or ion; you may use additional pages
A. Draw the Lewis structure of the molecule/ion. Including formal charge.
If applicable, Include all resonance structures.
B. Write the number of atoms and lone pairs on the central atom
C. Determine the electron geometry
D. Determine the molecular shape
E. Indicate the ideal bond angle
F. Determine if the molecule is polar or nonpolar. Ions are
always polar.
NH3 (an example)
A.
H-N-H
arrow_forward
Please mark the correct charges on my picture directly, and post in the answer column. I'll give a thumb up.Thank you very much.
arrow_forward
f.
g.
h.
OH
HgSO, H₂SO
H₂O
1. PCC, DCM
2. CH3Li, Et₂O
3. H₂O
+
1. H₂O
2. CH3OH
arrow_forward
Identify all of the ions/polyatomic ions in the paragraph above. Use it along with what you learned in live lesson to make your own chart.
arrow_forward
2. Explain how the chemical formulas H
for the same thing.
and HO
Can) are interchangeable notation
(ag)
Page 1 of 2
122 words
P Type here to search
DELL
F9
F10
F11
F12
PriScr
Ansert
Delete
F3
F4
FS
F7
F8
%23
%24
Backspace
8
arrow_forward
MgBr
1)
H₂O
H₂SO4
2) HCI / H₂O
1) BH3/THF
2) H₂O₂ / NaOH / H₂O
1) OsO4/THF
2) H₂S
1) Hg(OAc)2 / CH³CH₂OH
2)
NaBH4
arrow_forward
In the box below, provide the molecular formula for the compound shown above beginning with carbon. Note that your answer should not contain spaces, and that this
software does not allow for the use of subscripts. Numbers which should be written as a subscript should be written out normally. For instance, the correct answer for ethane
would be "C2H6" type your answer.....
arrow_forward
Please show step by step. I did it myself but I messed up somewhere.
arrow_forward
1. HgCl₂, H₂O
2. NaBH₁
arrow_forward
SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry: Matter and Change
Chemistry
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Glencoe/McGraw-Hill School Pub Co
Related Questions
- 15 of 16 I Review | Constants | Periodic Table Part A H O ||| CH3-C-N-CH2-CH3 Spell out the full name of the compound. Submit Request Answer Part B CH3-CH2-CH2 C-NH2 Spell out the full name of the compound. Pearson carson Education Inc. All rights reserved.| Terms of Use | Privacy Policy | Permissions | Contact Us | 12:14 AM xpジC 10/29/2020 PrtSc Delote F10 08.arrow_forwardA. Calculations for the Determination of Ammonium Chloride The data from the data entry portion of the report has been copied into this section of the report for your convenience. Use the data to make the necessary calculations. 38.478 g [1] Mass of evaporating dish #1: [2] Mass of evaporating dish and original sample (g): 39.383 g Mass of original sample (g) [3] Mass of evaporating dish after subliming NH4 (g): 39.265 g Mass of NH,CI (g) Percent of NH,CI (%)arrow_forwardA System 15% Part i Screenshot saved Tap to view your screenshot SHARE EDIT DELETE Part 2 3 compounds with elements from groups 2A and 7A Part 2 •. 5-6 / 10 Chemical Compound Cation Anion formula name Part 3 :::arrow_forward
- 8. HMAC=5083dd0d4d151e83553557f162ba7724#10301 11 of 16 I Review | Constants | Periodic Table Submit Request Answer Part C CH3 H;C CH2 N CH2 CH3 Spell out the full name of the compound. Submit Request Answer Next > Provide Feedback P Pearson arson Education Inc. All rights reserved. Terms of Use | Privacy Policy | Permissions | Contact Us | 12:14 AM xp ツ 10/29/2020 Backapacearrow_forward(please type answer)arrow_forward21. ADLC Assignment Booklet A3 Decide whether each statement is true (T) or false (F). Place your answer in the blank space given. Scientific theory states that the atoms in today's plastics were parts of microscopic plants and animals that lived in the oceans millions of years ago. b. Molecules of gasoline have more carbon atoms than do molecules of diesel fuel. c. Subjecting large molecules to cracking is useful because smaller molecules are manipulated more easily in a reaction to produce a desired product. d. Unsaturated compounds form during hydrocarbon cracking because too many hydrogen atoms are available for the number of carbon atoms.arrow_forward
- I need help please.arrow_forwardLewis Structure, Molecular Shape, and Molecular Polarity Lab Instructions: For each molecule or ion; you may use additional pages A. Draw the Lewis structure of the molecule/ion. Including formal charge. If applicable, Include all resonance structures. B. Write the number of atoms and lone pairs on the central atom C. Determine the electron geometry D. Determine the molecular shape E. Indicate the ideal bond angle F. Determine if the molecule is polar or nonpolar. Ions are always polar. NH3 (an example) A. H-N-Harrow_forwardPlease mark the correct charges on my picture directly, and post in the answer column. I'll give a thumb up.Thank you very much.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Chemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub Co
Chemistry: Matter and Change
Chemistry
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Glencoe/McGraw-Hill School Pub Co