Search found 102 matches

by vuongnaomi1L
Sun Feb 28, 2021 10:37 pm
Forum: Student Social/Study Group
Topic: Fave food
Replies: 138
Views: 306

Re: Fave food

It was my birthday weekend, so I made so many french macarons so celebrate. Not very healthy, but my favorite snack/dessert!
by vuongnaomi1L
Sun Feb 28, 2021 10:35 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Final
Replies: 15
Views: 35

Re: Final

Sunday morning on March 14, but check the time on the professor's website!
by vuongnaomi1L
Sun Feb 28, 2021 10:32 pm
Forum: Student Social/Study Group
Topic: Exercising Our Minds and Bodies
Replies: 120
Views: 633

Re: Exercising Our Minds and Bodies

Running and stretching!
by vuongnaomi1L
Sun Feb 28, 2021 10:32 pm
Forum: Student Social/Study Group
Topic: Balance / Self Care Tips
Replies: 43
Views: 140

Re: Balance / Self Care Tips

Reading (recreational reading) and excercise are my best self-care tips!
by vuongnaomi1L
Sun Feb 28, 2021 10:31 pm
Forum: Student Social/Study Group
Topic: Fav Shows of the Moment
Replies: 104
Views: 254

Re: Fav Shows of the Moment

Im too busy at the moment haha, but during spring break im definitely going to binge watch some 90's classics.
by vuongnaomi1L
Mon Feb 22, 2021 1:37 am
Forum: Student Social/Study Group
Topic: Balance / Self Care Tips
Replies: 43
Views: 140

Re: Balance / Self Care Tips

I feel like reading and cardio really helps!
by vuongnaomi1L
Thu Feb 18, 2021 11:17 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: The difference in approaching 4J.13 and 4J.15 in the Textbook
Replies: 3
Views: 26

The difference in approaching 4J.13 and 4J.15 in the Textbook

4J.13 Determine which of the following compounds are stable with respect to decomposition into their elements under standard conditions at 25 °C (see Appendix 2A): (a) PCl5(g); (b) HCN(g); (c) NO(g); (d) SO2(g). 4J.15 Which of the following compounds become less stable with respect to the elements a...
by vuongnaomi1L
Thu Feb 18, 2021 4:25 am
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Textbook question 4I.5
Replies: 1
Views: 11

Textbook question 4I.5

Suppose that 50.0 g of water at 20.0°C is mixed with 65.0 g of water at 50.0°C at constant atmospheric pressure in a thermally insulated vessel. Calculate ΔS and ΔStot for the process. I understand that since there is a temperature change we have to use ∆S=nCmln(Tf/Ti) in order to solve the equation...
by vuongnaomi1L
Wed Feb 17, 2021 2:09 pm
Forum: Calculating Work of Expansion
Topic: 4.7 7th Edition (why do we need to calculate the net production of moles of the reaction)
Replies: 1
Views: 11

Re: 4.7 7th Edition (why do we need to calculate the net production of moles of the reaction)

wait, I reread this question again, and since C6H6 is a liquid does that mean we have to find the change in gas molecules?
by vuongnaomi1L
Wed Feb 17, 2021 2:01 pm
Forum: Calculating Work of Expansion
Topic: 4.7 7th Edition (why do we need to calculate the net production of moles of the reaction)
Replies: 1
Views: 11

4.7 7th Edition (why do we need to calculate the net production of moles of the reaction)

4.7 4.7 (a) Calculate the work that must be done against the atmosphere for the expansion of the gaseous products in the combustion of 1.00molC6H6(l) at 25 °C and 1.00 bar. (b) Using data in Appendix 2A, calculate the standard enthalpy of the reaction. (c) Calculate the change in internal energy, ΔU...
by vuongnaomi1L
Mon Feb 15, 2021 2:10 am
Forum: Ideal Gases
Topic: 4.17 How to Identify When We Should Use the Ideal Gas Law?
Replies: 4
Views: 30

4.17 How to Identify When We Should Use the Ideal Gas Law?

A technician carries out the reaction 2SO2(g)+O2(g)→SO3(g)at 25 °C and 1.00 atm in a cylinder fitted with a piston and maintained at constant pressure. Initially, 0.030 mol SO2 and 0.030 mol O2 are present in the cylinder. The technician then adds a catalyst to initiate the reaction. (a) Calculate t...
by vuongnaomi1L
Sun Feb 14, 2021 11:54 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Favorability of a Reaction and ∆U
Replies: 4
Views: 12

Favorability of a Reaction and ∆U

Is there a way to tell whether or not a reaction can be favorable depending on ∆U?
by vuongnaomi1L
Sun Feb 14, 2021 11:53 pm
Forum: Calculating Work of Expansion
Topic: 4D.7 7th Edition
Replies: 2
Views: 18

4D.7 7th Edition

(a) Calculate the work that must be done against the atmosphere for the expansion of the gaseous products in the combustion of 1.00 mol C6H6(l) at 25°C and 1.00 bar. (b) Using data in Appendix 2A, calculate the standard enthalpy of the reaction. (c) Calculate the change in internal energy, ΔU, of th...
by vuongnaomi1L
Sun Feb 14, 2021 11:46 pm
Forum: Calculating Work of Expansion
Topic: When work is positive and negative
Replies: 3
Views: 8

When work is positive and negative

When work is negative, the system is doing work and when the work is positive, then work is being done on the system?

Is that correct?
by vuongnaomi1L
Sun Feb 14, 2021 11:43 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Does ∆U depend on q, w, and T?
Replies: 5
Views: 23

Does ∆U depend on q, w, and T?

Does ∆U always depend on w, q, and T? I am asking since there are two equations for ∆U, which are ∆U=3/2nR∆T and ∆U=q+w.
by vuongnaomi1L
Sun Feb 14, 2021 11:39 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Internal Energy, When Q is zero?
Replies: 4
Views: 10

Internal Energy, When Q is zero?

When q is zero in ∆U=q+w, does this mean that there is no heat transferred to the surroundings? When q is negative, it means that heat is released and when q is positive this means that there is heat absorption?

Can someone let me know if my statements are correct, or if I'm wrong.
by vuongnaomi1L
Sun Feb 07, 2021 11:54 pm
Forum: Student Social/Study Group
Topic: Superbowl Sunday
Replies: 25
Views: 131

Re: Superbowl Sunday

505598869 wrote:I was wrong to bet against the bucks.


LOL
by vuongnaomi1L
Sun Feb 07, 2021 11:52 pm
Forum: Student Social/Study Group
Topic: Study routine.
Replies: 51
Views: 114

Re: Study routine.

I think consistently practicing is the best place to start. Going to UA sessions, practice textbook problems, sapling, all of those will help with the midterms and finals. Remember not to cram!
by vuongnaomi1L
Sun Feb 07, 2021 11:50 pm
Forum: Student Social/Study Group
Topic: Fav Shows of the Moment
Replies: 104
Views: 254

Re: Fav Shows of the Moment

Attack on Titan
by vuongnaomi1L
Sun Feb 07, 2021 11:49 pm
Forum: Student Social/Study Group
Topic: Post Midterm 1...
Replies: 39
Views: 175

Re: Post Midterm 1...

I feel the same way, but don't feel too bad over it :) I find what has been helpful so far is going to UA sessions!
by vuongnaomi1L
Sun Feb 07, 2021 11:47 pm
Forum: Student Social/Study Group
Topic: Silly Mistakes?
Replies: 60
Views: 301

Re: Silly Mistakes?

Thanks for sharing this! It made me feel better about my mistakes on the test too!
by vuongnaomi1L
Sun Jan 31, 2021 11:43 pm
Forum: Student Social/Study Group
Topic: Worried About MT 1 Grades
Replies: 39
Views: 263

Re: Worried About MT 1 Grades

I never related to a chem community post more. Last quarter's midterms and this quarter's midterms are vastly different in terms of how challenging they were. I think we just need to try our best and see how it goes. We did the best we could and that's what matters the most.
by vuongnaomi1L
Sun Jan 31, 2021 11:41 pm
Forum: Student Social/Study Group
Topic: Midterm Grades
Replies: 15
Views: 87

Re: Midterm Grades

Hopefully by the end of the week!
by vuongnaomi1L
Sun Jan 31, 2021 11:40 pm
Forum: Student Social/Study Group
Topic: Spring 2021
Replies: 104
Views: 444

Re: Spring 2021

I am waiting next year as I want to get some hands on experience!
by vuongnaomi1L
Sun Jan 31, 2021 11:39 pm
Forum: Student Social/Study Group
Topic: Work Life Balance
Replies: 44
Views: 174

Re: Work Life Balance

I completely relate to this! I think as hard as it is, try to incorporate some healthy habits to keep our mental wellness in check, like listening to music, going in walks, or reading books. Hope this gets better!
by vuongnaomi1L
Sun Jan 31, 2021 11:35 pm
Forum: Administrative Questions and Class Announcements
Topic: Sapling Reset?
Replies: 17
Views: 103

Re: Sapling Reset?

Unfortunately, I do not think there is a reset button. What has been helpful to me is to take notes on the sapling questions so I can come back to it later.
by vuongnaomi1L
Sun Jan 24, 2021 11:43 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Approximation
Replies: 5
Views: 33

Re: Approximation

Professor Lavelle said that to be safe, whenever Ka < 10-4 then we are good to use the approximation. I don't think that will change in an exam setting either.
by vuongnaomi1L
Sun Jan 24, 2021 11:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Approximately x
Replies: 18
Views: 75

Re: Approximately x

Professor Lavelle has stated to be safe, whenever Ka < 10-4
by vuongnaomi1L
Sun Jan 24, 2021 11:37 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 187
Views: 109115

Re: Reading the textbook [ENDORSED]

I actuallly dont read the textbook and whenever I have a question I either ask the UA's or go to the professor's office hours.
by vuongnaomi1L
Sun Jan 24, 2021 11:35 pm
Forum: Administrative Questions and Class Announcements
Topic: Tutoring? [ENDORSED]
Replies: 87
Views: 74634

Re: Tutoring? [ENDORSED]

PLF sessions are also very helpful!!
by vuongnaomi1L
Sun Jan 24, 2021 11:34 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student - Part II [ENDORSED]
Replies: 222
Views: 16035

Re: Advice from a Medical Student - Part II [ENDORSED]

thank you so much for your update! this was so inspiring!!
by vuongnaomi1L
Sun Jan 24, 2021 11:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 107
Views: 7373

Re: Accessing the E-textbook [ENDORSED]

If you get the e-text, then it comes with the solutions manuel! not sure if that is included in the looseleaf version.
by vuongnaomi1L
Sun Jan 17, 2021 11:57 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: quadratic formula values
Replies: 13
Views: 79

Re: quadratic formula values

if both are positive, choose the one that will not result in a negative number when you plug it in the equations for equilibrium constants. For example, if an equation to find the equilibrium concentration of a reactant is 0.5-x and you have values 0.2 and 0.8 from your quadratic equation, 0.8 will ...
by vuongnaomi1L
Sun Jan 17, 2021 11:51 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: ICE table values
Replies: 20
Views: 83

Re: ICE table values

You should use the units given in the question, but mol/L is standard.
by vuongnaomi1L
Sun Jan 17, 2021 11:49 pm
Forum: Student Social/Study Group
Topic: Midterms During Lecture
Replies: 44
Views: 255

Re: Midterms During Lecture

Yes midterms are during lecture. I believe this was in the syllabus.
by vuongnaomi1L
Sun Jan 17, 2021 11:45 pm
Forum: Ideal Gases
Topic: PV=nRT
Replies: 74
Views: 523

Re: PV=nRT

P is for Pressure, V is for Volume in Liters, n is for number of moles, R is for gas constant, and T is for Temperature in Kelvin
by vuongnaomi1L
Sun Jan 17, 2021 11:44 pm
Forum: Student Social/Study Group
Topic: Comfort Movies
Replies: 128
Views: 359

Re: Comfort Movies

How To Be Single!! Dakota Johnson is such a great actress imo and this movie really shows how everyone's successes and timings are different! Really good to wind down after a stressful event (class).
by vuongnaomi1L
Sun Jan 10, 2021 11:30 pm
Forum: Student Social/Study Group
Topic: Sapling Homework
Replies: 15
Views: 56

Re: Sapling Homework

I think Dr. Lavelle assigns different due dates. It might not be the end of every week.
by vuongnaomi1L
Sun Jan 10, 2021 11:28 pm
Forum: Student Social/Study Group
Topic: Exam Changes
Replies: 12
Views: 80

Re: Exam Changes

Yes, our midterms will be during lecture for this quarter and not during discussion like it was last quarter.
by vuongnaomi1L
Sun Jan 10, 2021 11:27 pm
Forum: Student Social/Study Group
Topic: Study Tips
Replies: 32
Views: 113

Re: Study Tips

I find that going to workshops and step-up sessions before exams helped a lot. For this quarter, I'm going to try to go to at least one step-up and two-workshops per week so I can keep up with those worksheets!
by vuongnaomi1L
Sun Jan 10, 2021 11:25 pm
Forum: Student Social/Study Group
Topic: Study Habits
Replies: 96
Views: 333

Re: Study Habits

The best thing that I can do differently for myself this quarter is to make a schedule to realistically space out my studying, and force myself to stick to it. Cramming does not work, especially in a class like this. I find that it is better to study ahead of time so I can retain the information bet...
by vuongnaomi1L
Sun Jan 10, 2021 11:21 pm
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Posts in 14B
Replies: 156
Views: 2404

Re: Chemistry Posts in 14B

Hi! So I took 14A with a different professor over the summer and have never used Chem community. I just wanted to clarify, do we have to have a minimum of 5 posts each week, or do we just have to do a minimum of 50 posts by the end of the quarter? Hi! We have to do a minimum of 5 posts each week an...
by vuongnaomi1L
Mon Dec 14, 2020 11:57 pm
Forum: Student Social/Study Group
Topic: Final Exam
Replies: 49
Views: 355

Re: Final Exam

Yeah, I felt rushed too. Many people did. I dont think the alloted time was enough. Good luck to you though! Just remember that theres always chances to do better and grad schools like to see upward trends :)
by vuongnaomi1L
Sat Dec 12, 2020 4:16 pm
Forum: Bronsted Acids & Bases
Topic: Why is H2SO3 an acid when the oxygens have lone pairs?
Replies: 2
Views: 31

Why is H2SO3 an acid when the oxygens have lone pairs?

So H2SO3 is an acid, but the lewis structure (which I inserted below) has lone pairs to attract H+ ions from H2O, which will make OH- ions. So why is it an acid and not a base? What makes H2SO3 lose H+ ions but not attract them?
by vuongnaomi1L
Sat Dec 12, 2020 12:33 pm
Forum: Bronsted Acids & Bases
Topic: Textbook Problem J.1 Part C
Replies: 3
Views: 37

Textbook Problem J.1 Part C

This question asks to classify whether certain molecules are acids or bases. For part C, since KOH has an H, I thought this means that it could give off a proton and be an acid. Why is KOH a base and not an acid?
by vuongnaomi1L
Sat Dec 12, 2020 7:11 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Textbook Problem 9C.5
Replies: 5
Views: 38

Re: Textbook Problem 9C.5

This is the pic, forgot to insert.
by vuongnaomi1L
Sat Dec 12, 2020 7:10 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Textbook Problem 9C.5
Replies: 5
Views: 38

Textbook Problem 9C.5

In part d, the question asks the ligand can be polydentate, and give the maximum number of places on the ligand that can bind simultaneously to a single metal center. For oxalate ion, the formula is C2O4 2-. I attached a picture. Since there are lone pairs on 4 of the atoms, what makes it bidentate ...
by vuongnaomi1L
Sat Dec 12, 2020 12:34 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Why is CO (carbon monoxide) monodentate?
Replies: 6
Views: 56

Re: Why is CO (carbon monoxide) monodentate?

FrancescaHawkins3J wrote:In my understanding, CO is a monodentate ligand because when one of the lone pairs becomes a bonding pair, it repels the other lone pair, which becomes too far away to create a second bond.


This makes perfect sense! Thank you!
by vuongnaomi1L
Sat Dec 12, 2020 12:07 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Why is CO (carbon monoxide) monodentate?
Replies: 6
Views: 56

Why is CO (carbon monoxide) monodentate?

So the lewis structure of CO is C and O having triple bonds and there are 1 lone pair on each C and O. Since there are two lone pairs on the CO molecule, why isnt it a bidentate ligand?
by vuongnaomi1L
Fri Dec 11, 2020 11:43 pm
Forum: Lewis Structures
Topic: Confused about Fe's (Iron) total valence electrons
Replies: 2
Views: 30

Confused about Fe's (Iron) total valence electrons

Since Fe is a transition metal and has unfilled d orbitals, it can have up to 12 valence electrons when bonding; for example in the molecule Ba(FeBr4)2. Usually, when it is not bonded, it just has 2 valence electrons.

Can someone confirm or deny whether the statement above is correct?
by vuongnaomi1L
Thu Dec 10, 2020 11:31 pm
Forum: Conjugate Acids & Bases
Topic: What is the difference between a lewis acid and bases and Bronsted acids and bases?
Replies: 7
Views: 58

What is the difference between a lewis acid and bases and Bronsted acids and bases?

To my understanding, Bronsted acids and bases use the accepting or donating of H+ ions in their definition, while lewis acids and bases go by accepting or donating electrons in their definition. Is this correct?
by vuongnaomi1L
Thu Dec 10, 2020 12:37 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Why is NH2 a bidentate ligand?
Replies: 2
Views: 35

Why is NH2 a bidentate ligand?

The definition of a bidentate ligand is one that is able to donate 2 electron pairs. Since each N has 5 valence electrons and it bonds to Co, H, and another H, then it only has a lone pair left. Wouldnt this make each NH2 a monodentate ligand? I have attached an image of the coordination compound be...
by vuongnaomi1L
Thu Dec 10, 2020 5:28 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Why is NH2 a bidentate ligand?
Replies: 1
Views: 12

Why is NH2 a bidentate ligand?

The definition of a bidentate ligand is one that is able to donate 2 electron pairs. Since N has 5 valence electrons and it bonds to Co, H, and another H, then it only has a lone pair left. Wouldnt this make NH2 a monodentate ligand?
by vuongnaomi1L
Thu Dec 10, 2020 12:15 am
Forum: Quantum Numbers and The H-Atom
Topic: Why does nickel have an expanded octet?
Replies: 3
Views: 32

Why does nickel have an expanded octet?

Can someone explain why nickel has an expanded octet?

To my understanding, there are 8 electrons in nickel's 3d state, and there are 2 electrons in its 4s state. So how does it have an expanded octet?
by vuongnaomi1L
Wed Dec 09, 2020 11:36 pm
Forum: Quantum Numbers and The H-Atom
Topic: Why does nickel have an expanded octet?
Replies: 5
Views: 39

Why does nickel have an expanded octet?

Since nickel has n=4, which means it contains the f-orbitals, is this why it has an expanded octet?
by vuongnaomi1L
Wed Dec 09, 2020 6:51 pm
Forum: Bronsted Acids & Bases
Topic: why is SO2 acidic?
Replies: 1
Views: 22

why is SO2 acidic?

Why is SO2 acidic when it accepts a proton?
by vuongnaomi1L
Mon Dec 07, 2020 4:42 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Cisplatin Question
Replies: 1
Views: 38

Cisplatin Question

In cisplatin, why do the chlorines unbind from the ligand, and not the amine groups? Shouldn't the bond between platinum and ammonia be more sensitive to breaking off as opposed to the chlorine?
by vuongnaomi1L
Sun Dec 06, 2020 10:42 pm
Forum: Administrative Questions and Class Announcements
Topic: final format
Replies: 5
Views: 79

Re: final format

My TA said it was about 30 questions, and partial credit might be given to questions with multiple parts. I'd check with your TA just to make sure :)
by vuongnaomi1L
Sun Dec 06, 2020 10:41 pm
Forum: Administrative Questions and Class Announcements
Topic: Extra Credit
Replies: 13
Views: 155

Re: Extra Credit

I don't think extra credit is offered, but I would ask just to make sure :)
by vuongnaomi1L
Sun Dec 06, 2020 10:40 pm
Forum: Student Social/Study Group
Topic: Point distribution
Replies: 11
Views: 139

Re: Point distribution

I totally understand your point of view, but he is allowing many people to pass with a C- by just earning half the points in the course. I know several of us really want to pass with an A, including myself, but the pandemic sadly puts everyone in a difficult position. Do not let earning a grade low...
by vuongnaomi1L
Sun Dec 06, 2020 10:36 pm
Forum: Student Social/Study Group
Topic: How are you?
Replies: 117
Views: 886

Re: How are you?

I'm doing well! I'm just glad its the holidays. the holiday season is so overrated but is my favorite season of the year!
by vuongnaomi1L
Sun Dec 06, 2020 2:50 pm
Forum: Administrative Questions and Class Announcements
Topic: Lectures not loading
Replies: 6
Views: 76

Lectures not loading

Ever since CCLE came back up this late morning, my lectures wouldn't load. I tried clearing out cookies and logging back in, but does anyone know what else I can do?
by vuongnaomi1L
Sun Nov 29, 2020 10:27 pm
Forum: Student Social/Study Group
Topic: Midterm Partial Credit
Replies: 19
Views: 267

Re: Midterm Partial Credit

I think that questions that are harder and have more room for error have partial credit, but just to make sure I recommend emailing the professor or your TA :)
by vuongnaomi1L
Sun Nov 29, 2020 10:26 pm
Forum: Student Social/Study Group
Topic: How have your study habits changed?
Replies: 45
Views: 351

Re: How have your study habits changed?

Procrastination is my worse enemy, and I think I'm getting a little bit better, but I definitely still have room for improvement :)
by vuongnaomi1L
Sun Nov 29, 2020 10:24 pm
Forum: Student Social/Study Group
Topic: How to study for class
Replies: 30
Views: 227

Re: How to study for class

I find that going over the lecture notes and re-explaining the concepts to myself in my head are beneficial, as well as doing the outline homework. I only do the questions, I don't read the textbook though because I am very much a visual learner.
by vuongnaomi1L
Sun Nov 29, 2020 10:23 pm
Forum: Student Social/Study Group
Topic: Studying for Final Exam
Replies: 57
Views: 401

Re: Studying for Final Exam

I find that going over the outline questions and attending as many workshops as I can are very helpful! For older material I was planning to review the modules on the professor's website.
by vuongnaomi1L
Sun Nov 29, 2020 10:21 pm
Forum: Student Social/Study Group
Topic: Tips for Staying Focused
Replies: 52
Views: 607

Re: Tips for Staying Focused

I honestly struggle with this so much so I don't even know if I'm qualified to answer, but my best tips would be to listen to instrumental music (dont listen to music with voices and lyrics, very distracting), have snacks and water on hand, take breaks, and be in a not too cold or not too hot enviro...
by vuongnaomi1L
Sun Nov 22, 2020 11:53 pm
Forum: Student Social/Study Group
Topic: How to relax after midterms
Replies: 54
Views: 306

Re: How to relax after midterms

I really like to paint! or read a new book! :)
by vuongnaomi1L
Sun Nov 22, 2020 11:48 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Lectures through Thanksgiving
Replies: 7
Views: 91

Re: Lectures through Thanksgiving

I think we will have class since we only do really have Thursday and Friday off, but I would check with the TA or ask the professor during OH to make sure :)
by vuongnaomi1L
Sun Nov 22, 2020 11:47 pm
Forum: Student Social/Study Group
Topic: Exercising Our Minds and Bodies
Replies: 120
Views: 633

Re: Exercising Our Minds and Bodies

I live near the woods, so I like to run around there during daylight :)
by vuongnaomi1L
Thu Nov 19, 2020 1:00 am
Forum: Ionic & Covalent Bonds
Topic: How to determine which molecule is more ionic?
Replies: 11
Views: 124

How to determine which molecule is more ionic?

So I understand that BaBr2 is more ionic than BeBr2 because since electronegativity decreases down a group, then the electronegative difference between Ba and Br is greater than the electronegative difference between Be and Br2. However, I am confused because then why is NaCl a stronger ionic bond t...
by vuongnaomi1L
Wed Nov 18, 2020 12:26 am
Forum: Ionic & Covalent Bonds
Topic: Relationship of Cations in Melting Points
Replies: 1
Views: 34

Relationship of Cations in Melting Points

So what is the relationship of cations and melting points? So if cations that are smaller in size and have higher positive charges are stronger, then why does NaCl have a stronger ionic bond and a higher melting point than MgCl2. Mg is smaller than Na and has a 2+ charge, while Na has a 1+ charge. C...
by vuongnaomi1L
Sun Nov 15, 2020 11:52 pm
Forum: Dipole Moments
Topic: Which interactions are intermolecular?
Replies: 7
Views: 60

Which interactions are intermolecular?

To my understading:

When it comes to ion - dipole, hydrogen bonding, dipole-dipole interactions, and london dispersion forces, these are all intermolecular interatcions, not intramolecular interactions.

Can someone confirm or deny what I stated is correct?
by vuongnaomi1L
Sun Nov 15, 2020 5:53 pm
Forum: Ionic & Covalent Bonds
Topic: Difference on how atomic size affects covalent and dipole interactions
Replies: 9
Views: 46

Difference on how atomic size affects covalent and dipole interactions

To my understanding: For covalent bonds, increasing the atomic radius would result in a larger distance and a weaker bond, while for London dispersion forces, increasing the atomic radii would cause higher polarizability and thus a greater intermolecular attraction. Can someone confirm or deny what ...
by vuongnaomi1L
Sun Nov 15, 2020 5:44 pm
Forum: Dipole Moments
Topic: Do london dispersion forces occur for polar molecules
Replies: 3
Views: 23

Do london dispersion forces occur for polar molecules

For one of the questions on the week 5 and 6 sapling homework, there was an explanation of one of the homework questions that stated "dispersion forces do not involve electrostatic interactions of polar groups and are present between all molecules. I'm a bit confused by this statement since it ...
by vuongnaomi1L
Sun Nov 15, 2020 3:17 am
Forum: Octet Exceptions
Topic: How does sulfur have up to 12 valence electrons
Replies: 3
Views: 46

How does sulfur have up to 12 valence electrons

I'm confused about how sulfur can have 12 valence electrons in SO42- and SF6. I thought that since sulfur is in the third period, it could only go up to 10 valence electrons because sulfur's electrons can be excited to the 3d state. Any clarification would be appreciated.
by vuongnaomi1L
Sat Nov 14, 2020 8:03 pm
Forum: Quantum Numbers and The H-Atom
Topic: under which circumstances does 4s have lower energy than 3d?
Replies: 2
Views: 41

under which circumstances does 4s have lower energy than 3d?

So to my understanding, the 4s state is lower than the 3d state only when the 3d state does not get filled, or when the 4s state gets filled before the 3d state, correct? For example, in the electron configuration of Ca:[Ar] 4s^2, the 4s state would be lower than the 3d state because Ca does not hav...
by vuongnaomi1L
Sun Nov 08, 2020 7:35 pm
Forum: Student Social/Study Group
Topic: Mid-quarter Check in
Replies: 67
Views: 296

Re: Mid-quarter Check in

Not going to lie, the online format is honestly very depressing. With that being said, this class, in particular, is so much better than all my other classes. I feel like this class is very accomodating given all the changes from in-person classes to online classes. Hope everyone is drinking water a...
by vuongnaomi1L
Sun Nov 08, 2020 7:21 pm
Forum: Administrative Questions and Class Announcements
Topic: Reviewing Answers for Midterm 1
Replies: 13
Views: 133

Re: Reviewing Answers for Midterm 1

For my TA, he said that we have to email him to see which questions we missed. To clarify, I think it would be best to email your TA :)
by vuongnaomi1L
Sun Nov 08, 2020 7:19 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 Question Count
Replies: 17
Views: 134

Re: Midterm 2 Question Count

I'm pretty sure it will be about the same number of questions. For the difficulty level, I'm not sure if midterm 2 is going to be harder than midterm 1.
by vuongnaomi1L
Sun Nov 08, 2020 7:18 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Curve?
Replies: 12
Views: 140

Re: Midterm Curve?

Since the average for the midterm was high, I doubt that there will be a curve. But please check with your TA to clarify :)
by vuongnaomi1L
Sun Nov 08, 2020 7:16 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 Format
Replies: 7
Views: 43

Re: Midterm 2 Format

Hi! I'm pretty sure it will be the same format, with multiple-choice questions using Respondus.
by vuongnaomi1L
Sun Nov 01, 2020 11:49 pm
Forum: DeBroglie Equation
Topic: sapling homework
Replies: 4
Views: 49

Re: sapling homework

So your objective is to find the difference between the incident photons and the energy of the ejected electrons, in eV/atom. So since they give you the wavelength, you would use that to find the energy per photon in joules, convert that to energy per photon in eV. You would subtract the 0.137 eV by...
by vuongnaomi1L
Sun Nov 01, 2020 11:45 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Why is the 4s state filled before the 3d state?
Replies: 14
Views: 125

Why is the 4s state filled before the 3d state?

For K (potassium) on the periodic table, after Argon, you would just jump to period 4 for K, which would result in the electron configuration of potassium, K: [Ar]4s^1. Therefore the energy of the 4s state will be lower than the 3d state unless I fill the 3d state for another element (ie, scandium),...
by vuongnaomi1L
Sun Nov 01, 2020 11:21 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Why we do not specify if n is s, p, or d for one electron systems?
Replies: 2
Views: 26

Why we do not specify if n is s, p, or d for one electron systems?

So to my understanding, for hydrogen, we don't specify orbitals with the principal quantum number (n=1,2,3 etc) with the angular momentum (l) or the orientation of the angular momentum because the energy for the electron in the orbital is the same? If I am correct above, then the interaction of mult...
by vuongnaomi1L
Thu Oct 29, 2020 5:40 pm
Forum: Photoelectric Effect
Topic: when to use the kinetic energy equation and when to use Bohr's equation
Replies: 2
Views: 38

when to use the kinetic energy equation and when to use Bohr's equation

This is a discussion question from week two and I'm confused for part c. Part C asks what is the wavelength of the radiation that caused photo ejection of the electron. So for this question, I thought we can use the equation E photon = h times c / wavelength because we are trying to find the wavelen...
by vuongnaomi1L
Thu Oct 29, 2020 3:04 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Atomic Spectra Post Module Question
Replies: 2
Views: 38

Atomic Spectra Post Module Question

So this question asks what region of the electromagnetic spectrum does this wavelength correspond. Can someone clarify how to determine which wavelengths go in which region of the electromagnetic spectrum? This is the module question. The meter was defined in 1963 as 1,650,763.73 wavelengths of radi...
by vuongnaomi1L
Sun Oct 25, 2020 11:16 pm
Forum: Administrative Questions and Class Announcements
Topic: exam format
Replies: 1
Views: 12

Re: exam format

10 multiple choice questions with varying difficulty!
by vuongnaomi1L
Sun Oct 25, 2020 11:16 pm
Forum: Properties of Light
Topic: Is c always the speed of light?
Replies: 88
Views: 509

Re: Is c always the speed of light?

Based on what we've learned so far, C would be the speed of light unless the question otherwise specifies
by vuongnaomi1L
Sun Oct 25, 2020 11:12 pm
Forum: Properties of Light
Topic: How are you guys studying for the midterm?
Replies: 19
Views: 125

Re: How are you guys studying for the midterm?

video modules, retake the module tests and try to get the questions rights without referencing your notes too much, and then text book problems!
by vuongnaomi1L
Sun Oct 25, 2020 11:11 pm
Forum: Administrative Questions and Class Announcements
Topic: what kind of calculator
Replies: 4
Views: 17

Re: what kind of calculator

We are supposed to use a scientific calculator for the exam. I'm not sure if we are allowed to use a scientific graphing calculator so I'd recommend to email the professor or your TA :)
by vuongnaomi1L
Wed Oct 21, 2020 12:55 am
Forum: Molarity, Solutions, Dilutions
Topic: Outline 1 Textbook Question About Molarity (Question G.5)
Replies: 1
Views: 27

Outline 1 Textbook Question About Molarity (Question G.5)

Hi, I'm a bit confused about question G.5. A student prepared a solution of sodium bicarbonate by adding 2.111g of the solid to a 250 mL volumetric flask and adding water to the mark. Some of this solution was transferred to a buret. What volume of solution should the student transfer into a flask t...
by vuongnaomi1L
Sun Oct 18, 2020 10:31 pm
Forum: Student Social/Study Group
Topic: Midterm
Replies: 7
Views: 29

Re: Midterm

Hi, I feel like doing study sheets based of the modules on the professor's websites are really effective in getting down the basic material. For more complex practice problems, the textbook questions are very effective as well, as there may be similar questions on the midterm.
by vuongnaomi1L
Sun Oct 18, 2020 10:28 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Preference on Scientific Notation
Replies: 13
Views: 169

Re: Preference on Scientific Notation

I feel like you should answer the question based on how the scientific notion values are written in the question (if there any scientific notation values at all). Otherwise, I feel like the 10^6 style is more common and I personally haven't been asked to write it as E6. Of course, you should ask you...
by vuongnaomi1L
Sun Oct 18, 2020 10:26 pm
Forum: Photoelectric Effect
Topic: photoelectric effect
Replies: 17
Views: 145

Re: photoelectric effect

Yes, the threshold energy is the work function. For example, when you get a question that says that some amount of energy is required to remove an electron with zero kinetic energy, then you would know that the given amount of energy is the work function. This is due to the law of conservation of ma...
by vuongnaomi1L
Sun Oct 18, 2020 10:20 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: #18 Heisenberg Uncertainty Principle Post-Module Assessment
Replies: 2
Views: 31

Re: #18 Heisenberg Uncertainty Principle Post-Module Assessment

Andrew Jubintoro 3B wrote:The unit for Planck's constant, h, is Js
1 J = 1 kgm2s-2
So Js = kgm2s-2s = kgm2s-1


thank you!!
by vuongnaomi1L
Wed Oct 14, 2020 12:56 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: #18 Heisenberg Uncertainty Principle Post-Module Assessment
Replies: 2
Views: 31

#18 Heisenberg Uncertainty Principle Post-Module Assessment

Hi all. I'm just a bit confused about the units of all the values in Heisenberg's Uncertainty. To my understanding h = kg/m^2/s^2 delta x = m delta p = kg/m/s If I'm right (which I doubt) then when I solve for the velocity in the question 18 which is: The hydrogen atom has a radius of approximately ...
by vuongnaomi1L
Fri Oct 09, 2020 10:50 pm
Forum: SI Units, Unit Conversions
Topic: Textbook Homework Question
Replies: 3
Views: 62

Re: Textbook Homework Question

To solve this problem, Part a: 1. Write the formula of magnesium sulfate heptahydrate. (MgSO4 + 7H2O) 2. Find the molar mass of magnesium sulfate heptahydrate using the formula. 3. Then, in order to find the number of oxygen atoms in the sample, you first convert the 5.15 g sample of magnesium sulf...
by vuongnaomi1L
Fri Oct 09, 2020 10:49 pm
Forum: SI Units, Unit Conversions
Topic: When to convert units?
Replies: 12
Views: 105

Re: When to convert units?

I dont think it matters unless the question specifically asks for a certain unit, but I usually put the answer in the units that the question gives.
by vuongnaomi1L
Fri Oct 09, 2020 10:35 pm
Forum: Student Social/Study Group
Topic: Regarding Quizzes
Replies: 5
Views: 49

Re: Regarding Quizzes

Hi! My TA mentioned that we are using the system Respondus for the exams and he also mentioned that we will be using quizzes during discussion to "practice using Respondus" but I didn't have any indication that they will be factored into our overall grade.

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