Chemistry Question

12/6/22, 10:55 PMpractice exam 1 (written portion only): CHEM232-01-11-CX-Fall2022
practice exam 1 (written portion only)
Due No due date
Points 1
Questions 1
Time Limit None
Instructions
This is a practice run for you to upload written work for part of the exam. There is one page of questions
which will be representative of wehat can be on the. Work on them and then upload your work
(embedding a picture fo written work using the ‘picture’ icon circled in pink (you might have to click the
‘vertical 3 dots’ first.)
Attempt History
LATEST
Attempt
Time
Score
Attempt 1
613 minutes
0 out of 1 *
* Some questions not yet graded
Score for this quiz: 0 out of 1 *
Submitted Sep 18 at 10:03am
This attempt took 613 minutes.
Question 1
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Not yet graded / 1 pts
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practice exam 1 (written portion only): CHEM232-01-11-CX-Fall2022
Your Answer:
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practice exam 1 (written portion only): CHEM232-01-11-CX-Fall2022
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Exam 1: CHEM232-01-11-CX-Fall2022
 This quiz has been regraded; your score was affected.
Exam 1
Due Sep 18 at 11:59pm
Points 250
Questions 21
Available after Sep 16 at 11am
Time Limit 140 Minutes
Instructions
The exam will be administered via canvas. You can take the exam proctored in person, or virtually. If you
choose to do it virtually you must be logged in to zoom with video on so we can observe you. You must
be recording to cloud. within an hour of completing the exam you will be emailed the zoom recording.
you must then get the link and upload it to the ‘post your zoom for exam 1’ assignment under the exams
module on the course canvas. Failure to do this will result in a ‘0’ on the exam.
You can do the exam anytime over the weekend once it is released, BUT ONCE YOU STATR YOU WILL
ONLY HAVE 140 minutes
1/2 of the exam will be multiple choice, matching or single phrase fill in the blank. The other half will
require you to upload a picture of your written work onto canvas (embedded into the question). You can
do this the same way you have been uploading memes by clicking the ‘picture’ icon above (a screen shot
is included for reference below).
Attempt History
LATEST
Attempt
Time
Score
Regraded
Attempt 1
132 minutes
136.1 out of 250
209.1 out of 250
Score for this quiz: 209.1 out of 250
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1/26
12/6/22, 10:54 PM
Exam 1: CHEM232-01-11-CX-Fall2022
Submitted Sep 18 at 12:48pm
This attempt took 132 minutes.
Question 1
Original Score: 2 / 2 pts Regraded Score: 2 / 2 pts
 This question has been regraded.
Select the most electronegative element from the below options
Cl
Correct!
O
C
N
Question 2
3 / 3 pts
Which of the below structures are valid Lewis structures for C2H6NO2+
(there could be multiple correct answers, and the charges must be correct
to be valid)
Correct!
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Exam 1: CHEM232-01-11-CX-Fall2022
Correct!
Question 3
3 / 3 pts
Which of the below molecules are sets of constitutional isomers (there
might be multiple correct answers)
Correct!
Correct!
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Exam 1: CHEM232-01-11-CX-Fall2022
Correct!
4 / 4 pts
Question 4
Which of the following are not a resonance structure of the molecule in
the box. there may be more than 1 correct answer, select all that apply
I
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Exam 1: CHEM232-01-11-CX-Fall2022
Correct!
Question 5
2 / 2 pts
Which of the below molecules contribute most to the resonance hybrid of
the boxed molecule in the previous question.
Correct!
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9 / 9 pts
Question 6
Please match the highlighted bonds with the type of bond they are. A
electronegativity table is included
=
Correct!
O+ K-
Correct!
Se-S
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Ionic
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Exam 1: CHEM232-01-11-CX-Fall2022
Covalent
Correct!
C-Br
polar covalent
Question 7
6 / 9 pts
Please identify the orbitals that overlap to form each of the highlighted
bonds below
A is C-sp2 overlapping with an N-sp2
B is C-sp2 overlapping with a C-sp2 and C-p overlapping with an C-p
C is C-sp3 overlapping with a C-sp, and 2 C-P orbitals overlapping with a
C-sp3
Answer 1:
Correct!
C-sp2 overlapping with an N-sp2
Answer 2:
Correct!
C-sp2 overlapping with a C-sp2 and C-p overlapping with an C-p
Answer 3:
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Exam 1: CHEM232-01-11-CX-Fall2022
orrect Answer
C-sp overlapping with a C-sp3
ou Answered
C-sp3 overlapping with a C-sp, and 2 C-P orbitals overlapping with a Csp3
Question 8
2 / 10 pts
please rank S, P, SP, SP2, SP3 in order of increasing energy ( 1 is lowest,
5 is highest). Please check spelling and spacing. no credit will be given for
typographical errors even if it is clear you were on right track (no spaces
between letters and numbers!)
1 (lowest) is S
2 is P
3 is SP
4 is SP2
5 (highest) is SP3
Answer 1:
Correct!
S
Answer 2:
ou Answered
P
orrect Answer
SP
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Exam 1: CHEM232-01-11-CX-Fall2022
Answer 3:
ou Answered
SP
orrect Answer
SP2
Answer 4:
ou Answered
SP2
orrect Answer
SP3
Answer 5:
ou Answered
SP3
orrect Answer
P
Question 9
30 / 45 pts
This is a written question, thus you will have to embed a picture of your
written answer within this question. you can do this by clicking the icon
that looks like a picture and selecting the file with your work.
A) Please draw a correct lewis structure of NaHCO3 as well as all of the
relevant resonance structures and resonance hybrid. (For full credit you
will need to use curved arrows to show the electron flow between your
resonance structures ) 15 points
B) Please draw three constitutional isomers of the molecular formula
C6H12 that do not possess SP2 hybridized carbons. 15 points
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Exam 1: CHEM232-01-11-CX-Fall2022
C) Please draw the below molecule in three dimension (including all
hydrogens) using wedge and dash notation for the SP3 atom(s). For the
double bond, please specify and draw the orbitals involved in
(superimposed over it). Also denote the hybridization of the N and make
sure it is drawn in the proper geometry with the orbital the lone pair of
electrons denoted. 15 points
Your Answer:
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Exam 1: CHEM232-01-11-CX-Fall2022
Question 10
6 / 6 pts
Please rank the below molecules in order if increasing molecular dipole
(Low to High). A periodic table/electronegativity chart is included for your
convenience
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Exam 1: CHEM232-01-11-CX-Fall2022
A
< B < C Answer 1: Correct! A Answer 2: Correct! B Answer 3: Correct! C Question 11 12 / 12 pts The C and O in Formaldehyde (CH2O) are trigonal planar and the C and O are sp2 hybridized. CH2O is polar because there is a large difference in electronegativity between the C and O Answer 1: Correct! trigonal planar https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 12/26 12/6/22, 10:54 PM Exam 1: CHEM232-01-11-CX-Fall2022 Answer 2: Correct! sp2 Answer 3: Correct! polar Answer 4: Correct! there is a large difference in electronegativity between the C and O Question 12 9 / 9 pts please match the highlighted functional group with its name 1: 2: https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 13/26 12/6/22, 10:54 PM Exam 1: CHEM232-01-11-CX-Fall2022 3: Correct! 1 carboxylic acid Correct! 2 amide Correct! 3 alcohol Other Incorrect Match Options: phenyl benzene alkane Question 13 13.5 / 18 pts please rank the below compounds in order of increasing boiling point (low to high). https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 14/26 12/6/22, 10:54 PM Exam 1: CHEM232-01-11-CX-Fall2022 A < B < D < C Now please list the strongest intermolecular interaction for each of the above molecules (your options are ionic, hydrogen-bonding, dipole-dipole or London dispersion) Please watch spelling (copy and paste the options). We will not give credit to miss spellings or typographical errors. A's strongest intermolecular interaction is London dispersion B's strongest intermolecular interaction is London dispersion C's strongest intermolecular interaction is dipole-dipole D's strongest intermolecular interaction is hydrogen-bonding Answer 1: Correct! A Answer 2: Correct! B Answer 3: ou Answered D orrect Answer C Answer 4: ou Answered C orrect Answer D Answer 5: https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 15/26 12/6/22, 10:54 PM Correct! Exam 1: CHEM232-01-11-CX-Fall2022 London Dispersion orrect Answer Dispersion orrect Answer hydrogen bonding Answer 6: Correct! orrect Answer london dispersion dispersion Answer 7: Correct! dipole-dipole orrect Answer dipole dipole Answer 8: Correct! hydrogen-bonding orrect Answer hydrogen bonding orrect Answer H-bonding orrect Answer h-bonding Question 14 4 / 4 pts The compound that yielded the IR spectra below most likely has a alcohol due to the broad peak at 3300 which correlates to an O-H bond . a table of common IR shifts is included for your convenience. https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 16/26 12/6/22, 10:54 PM Exam 1: CHEM232-01-11-CX-Fall2022 Answer 1: Correct! alcohol Answer 2: Correct! broad peak at 3300 which correlates to an O-H bond Question 15 https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 4 / 4 pts 17/26 12/6/22, 10:54 PM Exam 1: CHEM232-01-11-CX-Fall2022 The compound that yielded the IR spectra below most likely has a carboxylic acid due the the broad peak at 3200 and the sharp peak at 1700 . Answer 1: Correct! carboxylic acid Answer 2: Correct! the broad peak at 3200 and the sharp peak at 1700 Question 16 36 / 36 pts This is a written question, thus you will have to embed a picture of your written answer within this question. you can do this by clicking the icon that looks like a picture and selecting the file with your work. A) Please draw a 3-D representation of carbontetrabromide (CBr4) and dibromomethane (CH2Br2). draw all of the bond dipoles in each molecule, and predict which molecule will be more more polar (have a larger molecular dipole). (18 points Hint: you will need to draw your carbons as tetrahedrons with wedges and dashes used appropriately). https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 18/26 12/6/22, 10:54 PM Exam 1: CHEM232-01-11-CX-Fall2022 B) Please draw the structure of THC (given below) and: 1) Circle all of the functional groups that can partake in hydrogen bonding (either donating or accepting). 2) put a square around the alkene 3) put a triangle around the 1o carbons 18 points Your Answer: https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 19/26 12/6/22, 10:54 PM Exam 1: CHEM232-01-11-CX-Fall2022 Question 17 4 / 4 pts HBr (pKa=-9) is 100 times more acidic than HCl (pKa=-7). HBr and HCl are both Arrhenius acids: True Answer 1: Correct! 100 Answer 2: Correct! True Question 18 10 / 10 pts Please consider the following acid base reaction and answers the associated questions. https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 20/26 12/6/22, 10:54 PM Exam 1: CHEM232-01-11-CX-Fall2022 1) the conjugate base in the above equilibrium is the species labeled with the letter C 2) This reaction will favor the [ Select ] 3) A rough approximation of the Keq for this reaction would be [ Select ] Answer 1: Correct! C Answer 2: Correct! products Answer 3: Correct! 10^11 orrect Answer -11 Question 19 9 / 9 pts Please rank the below Bronsted-Lowry acids in order of increasing acidity (least to most). Please note, you do not need a pKa table to answer this question. https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 21/26 12/6/22, 10:54 PM Exam 1: CHEM232-01-11-CX-Fall2022 C < A < B We learned that there are 4 major factors that determine acidity (electronegativity, resonance, inductive effect, and atomic size). Of these inductive effect is the major reason for the above trend. (please watch spelling!!!) Answer 1: Correct! C Answer 2: Correct! A Answer 3: Correct! B Answer 4: Correct! inductive effect orrect Answer the inductive effect https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 22/26 12/6/22, 10:54 PM Exam 1: CHEM232-01-11-CX-Fall2022 3.6 / 9 pts Question 20 Please rank the below Bronsted-Lowry acids in order of increasing acidity (least to most). Please note, you do not need a pKa table to answer this question. B < D < A < C We learned that there are 4 major factors that determine acidity (electronegativity, resonance, inductive effect, and atomic size). Of these electronegativity is the major reason for the above trend. (please watch spelling!!!) Answer 1: Correct! B Answer 2: ou Answered D orrect Answer A Answer 3: https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 23/26 12/6/22, 10:54 PM Exam 1: CHEM232-01-11-CX-Fall2022 ou Answered A orrect Answer C Answer 4: ou Answered C orrect Answer D Answer 5: Correct! electronegativity Question 21 37 / 42 pts A) carboxylates are the conjugate acid of carboxylic acids. carboxylic acids typically have a pKa of ~5. Under biological conditions (pH7), would the carboxylic acid in benzoic acid (shown below) exist as the carboxylate or carboxylic acid. Please explain your answer using the HendersonHasselback equation (included). (10 points) B) Please provide the electron pushing for the below acid base reaction, and predict whether the Keq will be greater than or less than 1 with justification. For full credit, you must include the anti bonding orbital that is https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 24/26 12/6/22, 10:54 PM Exam 1: CHEM232-01-11-CX-Fall2022 important and draw resonance structure to explain which conjugate base is more stable. (17points). C) In chapter 6 we will learn about the SN2 reaction. The reaction is shown below. Please add curved arrows and the used antibonding orbitals to the the below reaction scheme to complete step. Also, identify each step as either a Lewis, Bronstead-lowery or Arrhenius acid/base step. 15 points Your Answer: https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 25/26 12/6/22, 10:54 PM Exam 1: CHEM232-01-11-CX-Fall2022 Part A: Correct Part B: Correct Part C: Incorrect arrows and orbital in first step (-5 pts) Quiz Score: 209.1 out of 250 https://sdsu.instructure.com/courses/112997/quizzes/187759?module_item_id=2075378 26/26 12/6/22, 10:55 PM practice exam 2 (written part only): CHEM232-01-11-CX-Fall2022 practice exam 2 (written part only) Due No due date Points 0 Questions 0 Time Limit None Instructions Chapter 4 (with some chapter 5): A) Please draw a structure for (1R,2S)-2-tert-butylcyclohexan-1-ol in its lowest energy chair conformation. B) Please draw a newman projection about the C-C bond of 1,2-dibromoethane in the staggered, eclipsed and gauche conformation. Please rank the conformations from lowest to highest energy. Chapter 5: please draw scyllo inositol, a natural sugar alcohol found in the coconut palm, in its lowest energy conformation and explain if it is chiral or not (using drawings!!! such as showing if there is a plane of symmetry or that the mirror images are not super imposeable. If you do not show your logic, you will not get credit for this part). https://sdsu.instructure.com/courses/112997/quizzes/187762?module_item_id=2075380 1/3 12/6/22, 10:55 PM practice exam 2 (written part only): CHEM232-01-11-CX-Fall2022 Chapter 6: https://sdsu.instructure.com/courses/112997/quizzes/187762?module_item_id=2075380 2/3 12/6/22, 10:55 PM practice exam 2 (written part only): CHEM232-01-11-CX-Fall2022 Attempt History LATEST Attempt Time Score Attempt 1 1,684 minutes 0 out of 0 Score for this quiz: 0 out of 0 Submitted Oct 16 at 4:47pm This attempt took 1,684 minutes. Quiz Score: 0 out of 0 https://sdsu.instructure.com/courses/112997/quizzes/187762?module_item_id=2075380 3/3 12/6/22, 10:56 PM exam 2 : CHEM232-01-11-CX-Fall2022 exam 2 Due Oct 16 at 11:59pm Points 250 Questions 21 Available after Oct 14 at 11:59am Time Limit 140 Minutes Instructions 1/2 of the exam will be multiple choice, matching or single phrase fill in the blank. The other half will require you to upload a picture of your written work onto canvas (embedded into the question). You can do this the same way you have been uploading memes by clicking the 'picture' icon above (a screen shot is included for reference below). The exam is open notes Attempt History LATEST Attempt Time Score Attempt 1 140 minutes 141.8 out of 250 Score for this quiz: 141.8 out of 250 Submitted Oct 15 at 3:37pm This attempt took 140 minutes. Question 1 3 / 3 pts What is the correct IUPAC name of the below compound. https://sdsu.instructure.com/courses/112997/quizzes/187765?module_item_id=2075381 1/30 12/6/22, 10:56 PM Correct! exam 2 : CHEM232-01-11-CX-Fall2022 3-methyl-4-isopropyl-nonane 2-Ethyl-3-isopropyloctane 5-Isobutyl-6-methylheptane 3-sec-Butyl-2-methyloctane Question 2 3 / 3 pts What is the correct IUPAC name of the below compound? Correct! 3,5-Dimethyl-1-heptanol 3,5-Dimethyl-7-heptanol 2-Ethyl-4-methyl-6-hexanol 5-Ethyl-3-methylhexanol Question 3 3 / 3 pts The correct IUPAC name for the below molecule is https://sdsu.instructure.com/courses/112997/quizzes/187765?module_item_id=2075381 2/30 12/6/22, 10:56 PM Correct! exam 2 : CHEM232-01-11-CX-Fall2022 4-bromo-3,6,7-trimethyl-1-octene 4-bromo-6-isopropyl-3-methyl-1-heptene 3,6,7-trimethyl-4-bromo-1-octene 4-bromo-6-isopropyl-3,6-dimethyl-1-hexene Question 4 6 / 6 pts which of the Newmam projections of 1,2 dibromoethane would be the most stable. Correct! https://sdsu.instructure.com/courses/112997/quizzes/187765?module_item_id=2075381 3/30 12/6/22, 10:56 PM exam 2 : CHEM232-01-11-CX-Fall2022 Question 5 5 / 5 pts Which of the below newman projections corresponds to a gauche conformation Correct! https://sdsu.instructure.com/courses/112997/quizzes/187765?module_item_id=2075381 4/30 12/6/22, 10:56 PM exam 2 : CHEM232-01-11-CX-Fall2022 Correct! Question 6 5 / 5 pts The least stable conformation of 2,3-dibromobutane, viewed through the newman projection of the C-2—C-3 bond https://sdsu.instructure.com/courses/112997/quizzes/187765?module_item_id=2075381 5/30 12/6/22, 10:56 PM exam 2 : CHEM232-01-11-CX-Fall2022 Correct! Question 7 https://sdsu.instructure.com/courses/112997/quizzes/187765?module_item_id=2075381 14.4 / 18 pts 6/30 12/6/22, 10:56 PM exam 2 : CHEM232-01-11-CX-Fall2022 For the above chair interconversion: The name of larger substituent is tert-butyl . the higher energy conformation is 1 . the Keq of this chair interconversion is