## Search found 67 matches

Sat Dec 12, 2020 3:46 pm
Forum: Naming
Topic: Aqua vs Hydrate
Replies: 12
Views: 130

### Re: Aqua vs Hydrate

What happens if it is anionic is it still aqua or would it be aquate?
Fri Dec 11, 2020 9:52 pm
Forum: Naming
Topic: Aqua vs Hydrate
Replies: 12
Views: 130

### Re: Aqua vs Hydrate

I noticed that oh2 is also considered aqua if it is in the coordination compound is that true?
Fri Dec 11, 2020 7:23 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Ph and PKA
Replies: 7
Views: 114

### Re: Ph and PKA

Is ha the base and a- the acid component of the equation?
Thu Dec 10, 2020 11:21 pm
Forum: Einstein Equation
Topic: Solving for work frequency
Replies: 1
Views: 57

### Solving for work frequency

I know the work frequency equation is threshold frequency times the plancs constant. I was wondering if solving the threshold frequency equation is E=hv. Then you multiply it with the plancs constant in order to get the work function?
Thu Dec 10, 2020 11:13 am
Forum: Photoelectric Effect
Topic: Work function?
Replies: 1
Views: 58

### Work function?

I was wondering if work function= plancs constant* the threshold frequency? Also what happens if they do not give you the threshold frequency? Is there a way to calculate it?
Wed Dec 09, 2020 4:55 pm
Forum: Naming
Topic: Aqua vs Hydrate
Replies: 12
Views: 130

### Aqua vs Hydrate

Is it aqua if it is directly connected to the coordination compound while it is called hydrate if it is not? Is there anymore examples of like differing names compared to the original atomic name?
Wed Dec 09, 2020 4:54 pm
Forum: Naming
Topic: Ferrate
Replies: 7
Views: 113

### Re: Ferrate

If iron is not directly connected to the coordination compound is it considered iron or is it called ferrate if the coordination compound is negative?
Wed Dec 09, 2020 12:30 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Ph and PKA
Replies: 7
Views: 114

### Ph and PKA

I was wondering if the pka is higher than the ph then does that mean it is neutral according to the lecture #28 where Dr.Lavelle said it is negative because the pka is lower than the ph? Also what exactly does pka mean because I thought it was strength of acid but Dr.Lavelle said if it is more acidi...
Wed Dec 09, 2020 12:07 am
Forum: Lewis Acids & Bases
Topic: Lecture 28 #1
Replies: 5
Views: 45

### Lecture 28 #1

I was wondering why HF would stabilize the anion the most and be the strongest acid because I thought Hf would be the weakest because it is the hardest to break and would not disassociate as easily as the other ones listed in the chart?
Wed Dec 09, 2020 12:01 am
Forum: Conjugate Acids & Bases
Topic: Weak Acid and Weak Base
Replies: 2
Views: 27

### Weak Acid and Weak Base

When I was doing the homework there seemed to be a pattern where the salts had a certain pattern where if it had a strong acid and a strong base it would be neutral. Then if it had a strong acid and a weak base it would be acidic and a strong base and weak acid would be basic. I was wondering if thi...
Mon Dec 07, 2020 6:14 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: HClO3 - Strong Acid?
Replies: 2
Views: 20

### Re: HClO3 - Strong Acid?

I asked this question and it seems like he never called it a weak acid so it should be a strong acid.
Mon Dec 07, 2020 1:40 pm
Forum: Lewis Acids & Bases
Topic: HClO3
Replies: 3
Views: 48

### HClO3

Good afternoon,
I was wondering if Dr.Lavelle considers HClO3 to be a strong or weak acid since I was reading the textbook and it said it could be considered either or.
Sun Dec 06, 2020 1:55 pm
Forum: Naming
Replies: 22
Views: 179

### Re: Helpful Videos for Naming

Thank you for the videos they were really helpful!
Sat Dec 05, 2020 6:02 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxalate ion
Replies: 5
Views: 60

### Oxalate ion

I was wondering why oxalate is only a bidente because there is four oxygens in it that can be bound.
Thu Dec 03, 2020 9:23 pm
Forum: Lewis Acids & Bases
Topic: 6 strong acids
Replies: 4
Views: 70

### 6 strong acids

I was wondering what was the 6 strong acids I think Dr.Lavelle mentioned it in lecture but I do not recall?
Thu Dec 03, 2020 7:28 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Difference between electron geometry and molecular geometry
Replies: 5
Views: 58

### Difference between electron geometry and molecular geometry

Good afternoon,
I was wondering what the difference between the electron and molecular geometry was?
Thu Dec 03, 2020 7:23 pm
Forum: Naming
Topic: what does (en) mean?
Replies: 23
Views: 234

### Re: what does (en) mean?

https://lavelle.chem.ucla.edu/wp-conten ... pounds.pdf here is the link for anyone who needs it!
Sun Nov 29, 2020 9:46 pm
Forum: Student Social/Study Group
Topic: Professor Lavelle's hat
Replies: 17
Views: 270

### Re: Professor Lavelle's hat

This is such a cute question hopefully it is something chemistrywise.
Sun Nov 29, 2020 9:44 pm
Forum: Student Social/Study Group
Topic: Final Exam Tips
Replies: 24
Views: 172

### Re: Final Exam Tips

I usually try to go to the ua sessions throughout the week and most importantly the ones before the final/midterm because they do review and hopefully lavelle does an official review session for the final.
Sun Nov 29, 2020 9:43 pm
Forum: Student Social/Study Group
Topic: Final Exam Partial Credit
Replies: 1
Views: 36

### Final Exam Partial Credit

I was wondering if the final exam will give partial credit on questions like midterm 1?
Sun Nov 29, 2020 9:41 pm
Forum: Student Social/Study Group
Topic: Happy Thanksgiving!
Replies: 38
Views: 330

### Re: Happy Thanksgiving!

Mine made pasta this year and I had a friendgiving with my friends and made a nice turkey together.
Sun Nov 29, 2020 9:40 pm
Forum: Student Social/Study Group
Topic: Final Format
Replies: 35
Views: 380

### Re: Final Format

Will they be proctoring through zoom again during that specific time so all the tas students will be in the zoom?
Sun Nov 29, 2020 9:37 pm
Forum: Student Social/Study Group
Topic: Week 8/9 Thoughts/Worries
Replies: 66
Views: 545

### Re: Week 8/9 Thoughts/Worries

I feel like it is going well and the multiple choice test are pretty simple with some harder questions.
Mon Nov 23, 2020 5:48 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Homework question Sapling
Replies: 6
Views: 83

### Homework question Sapling

For the x-y-x question on the homework with two lone pairs on each side of the y why would that be a bent I thought the two lone pairs would cancel each other in force and it would make it a linear shape?
Tue Nov 17, 2020 7:20 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Intermolecular size vs Intramolecular size
Replies: 2
Views: 36

### Intermolecular size vs Intramolecular size

For stronger intermolecular forces are you looking for the larger molecule because it has more electrons=stronger bonds while for intramolecular forces you would look for the smaller molecule so it can be pulled in closer?
Tue Nov 17, 2020 4:42 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: H20 to H2S
Replies: 4
Views: 99

### H20 to H2S

Is h20 to h2s considered a hydrogen bond because the S has a lone pair that can be attached to the h20 which is h-O bond?
Tue Nov 17, 2020 4:29 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Hydrogen bonding
Replies: 1
Views: 20

### Hydrogen bonding

For hydrogen bonds does it matter what the other molecule is if it has lone pairs for a h-n,h-f, or h-o can bond to?
Tue Nov 17, 2020 1:53 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: London Dispersion Force
Replies: 5
Views: 24

### London Dispersion Force

Is LDF present in all intermolecular bonds it seems to be pretty common?
Mon Nov 16, 2020 3:27 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Difference between formal charge and oxidation number?
Replies: 6
Views: 37

### Difference between formal charge and oxidation number?

What is the difference between a formal charge and a oxidation number?
Fri Nov 13, 2020 5:25 pm
Forum: Administrative Questions and Class Announcements
Topic: Midtern #2
Replies: 6
Views: 41

### Midtern #2

I was wondering what I have to print out for midterm #2
Fri Nov 13, 2020 3:50 pm
Forum: Ionic & Covalent Bonds
Topic: Sapling Hw Urea Question
Replies: 2
Views: 40

### Sapling Hw Urea Question

I was wondering why the answer for the urea questions 8 bonds.
Wed Nov 11, 2020 6:09 pm
Forum: Dipole Moments
Topic: Dipole dipole vs LDF
Replies: 10
Views: 110

### Dipole dipole vs LDF

I was wondering if Dipole Dipole and ldf were the same kind of force?
Wed Nov 11, 2020 3:25 pm
Forum: Dipole Moments
Topic: Induced dipole vs permanent dipole
Replies: 3
Views: 29

### Induced dipole vs permanent dipole

I was wondering if there is a difference between induced dipoles vs permanent dipoles from todays lecture? I think induced is from elements that have similar electronegativities and or are the same while permanent is from two dramatically different electronegativities and was wondering if that was r...
Wed Nov 11, 2020 3:23 pm
Forum: Administrative Questions and Class Announcements
Topic: Hannah Chew's week 6 answers
Replies: 1
Views: 49

### Hannah Chew's week 6 answers

I was wondering if anyone had hannah chew's week 5 answers because I left early from her ua session.
Wed Nov 11, 2020 12:13 am
Forum: Resonance Structures
Topic: Hybrid structures
Replies: 2
Views: 29

### Hybrid structures

It has been mentioned in resonance structures there is hybrid structures for example N02 where the Os are in a sense both double bonded but are like 1.5 bonds and they have 5 valence electrons. I was wondering if this is its true form in nature or if it is never seen in nature but rather have either...
Sun Nov 08, 2020 11:50 pm
Forum: Electronegativity
Topic: test
Replies: 7
Views: 174

### Re: test

I believe you do not like they will not ask what is the electronegativity of fluorine or something but you should know the general trend of how it gets more electronegative as you go to the right of the periodic table I just remember that fluorine is the most and just recall that.
Sun Nov 08, 2020 11:48 pm
Forum: Student Social/Study Group
Topic: Test Anxiety
Replies: 62
Views: 375

### Re: Test Anxiety

For my test anxiety I just read out the questions and try to stay calm and realize its rlly not the end of the world if I dont do extremely well on this test like 5 years from now I wont rlly care nor will doing bad on one test affect my future.
Fri Nov 06, 2020 3:15 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: 5/2R vs 3/2R
Replies: 8
Views: 3607

### Re: 5/2R vs 3/2R

Monoatomic gases are gases that are noble gases like halogen and other substances.
Wed Nov 04, 2020 5:16 pm
Forum: Electronegativity
Topic: Electron spin part 2
Replies: 4
Views: 71

### Electron spin part 2

I was also wondering what does the electron spin impact. Does it matter if its -1/2 or 1/2 except for the relative direction it is spinning?
Wed Nov 04, 2020 5:08 pm
Forum: Resonance Structures
Topic: Electron spin
Replies: 12
Views: 55

### Electron spin

I was wondering how to determine if the electron is spinning +1/2 or -1/2?
Wed Nov 04, 2020 5:06 pm
Forum: Quantum Numbers and The H-Atom
Topic: How do they know that ml quantum number is half that of the # of elements in its respective block?
Replies: 2
Views: 13

### Re: How do they know that ml quantum number is half that of the # of elements in its respective block?

I do not think we need to know this but I do assume it is from experiments that they realized that.
Wed Nov 04, 2020 5:00 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 212
Views: 1836

### Re: Favorite TV shows

My all time favorite tv show is gossip girls because it kept me on my toes.
Sun Nov 01, 2020 11:54 am
Forum: *Shrodinger Equation
Topic: Midterm Scores
Replies: 30
Views: 377

### Re: Midterm Scores

You would probably go to ucla ccle quiz section and or myucla and go into your grade book to be able to see your midterm score.
Tue Oct 27, 2020 12:06 pm
Forum: Einstein Equation
Topic: E=hv vs. E=1/2mv^2
Replies: 6
Views: 97

### Re: E=hv vs. E=1/2mv^2

You are suppose to use E=hv with protons because they do not have mass thus the m is missing from the equation. While for E=1/2mv^2 is used for electrons or anything else that has mass and most of the time in the problem they either give you the velocity or the mass which is a huge giveaway to which...
Tue Oct 27, 2020 11:49 am
Forum: General Science Questions
Topic: Quantum world objective again
Replies: 3
Views: 31

### Re: Quantum world objective again

With this v = - R [ 1/n^2 -1/n^2] equation couldnt you use it to find the frequency and then convert it into E= frequency times plancs constant to figure out the exact energy?
Mon Oct 26, 2020 11:20 pm
Forum: General Science Questions
Topic: Quantum world objective again
Replies: 3
Views: 31

### Quantum world objective again

I was also confused on the objective about knowing how to calculate electron transitions for the H-atom spectrum using the En equation. Does this mean the En equation only works for hydrogen atoms? Am I able to use the rydberg equation for hydrogen atoms or do I have to use the En equation?
Mon Oct 26, 2020 11:16 pm
Forum: General Science Questions
Topic: Quantum world objective
Replies: 2
Views: 39

### Quantum world objective

Good afternoon, I was confused on using the Bohr frequency condition to explain the origin of the lines in the spectrum of an element. I thought the lines just depended on how many levels you dropped like if you dropped from n=5 to n=1 it would be 4 lines because it dropped 4 levels? Could someone c...
Mon Oct 26, 2020 2:40 pm
Forum: Properties of Light
Topic: Lyman VS Balmer series
Replies: 5
Views: 53

### Re: Lyman VS Balmer series

Yes you are correct that for the Lyman series it has to drop down to the 1st level and for the Balmer it drops to the second electron level as the end result. Also if it is dropping that means energy is being emitted.
Mon Oct 26, 2020 2:38 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: How to Calculate Uncertainty
Replies: 6
Views: 43

### Re: How to Calculate Uncertainty

For me I just use the equation and plug in for delta p and delta x with delta x usually being the diameter away from the atom and delta p equaling m and delta v usually. Then reading the problem and plugging into the equation. I wish I could put the equation here but I do not know how to attach imag...
Sun Oct 25, 2020 11:21 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Equation and Negative Signs
Replies: 11
Views: 119

### Re: Rydberg Equation and Negative Signs

I think if energy is being released you need to make the value positive because it is releasing it and not consuming energy which is implied with the negative. I remember in a step up session my ua said the value is always positive because the energy is being released. Hope this was helpful!
Thu Oct 22, 2020 3:52 pm
Forum: Student Social/Study Group
Topic: Official midterm review sessions
Replies: 3
Views: 49

### Official midterm review sessions

Good afternoon,
I was wondering if Dr.Lavelle,tas, or las were doing any official review sessions for the midterm because I remember last year Lavelle did.
Tue Oct 20, 2020 10:36 am
Forum: General Science Questions
Topic: Rydberg Formula
Replies: 6
Views: 65

### Rydberg Formula

Good afternoon,
I was confused on question 6 from the homework because for the wavelength range in nanonometers do you plug in 6 and 1 into Rydberg's formula 1/λ = RZ^2(1/n1^2 - 1/n2^2) for the longest gap and then 6 and 5 in for the shortest gap?
Mon Oct 19, 2020 8:41 pm
Forum: General Science Questions
Topic: Wave like properties
Replies: 4
Views: 44

### Wave like properties

I was rewatching todays lecture and when Lavelle was discussing whether or not the car displayed wave like properties I got confused. How do you know if something displays wave like properties?
Mon Oct 19, 2020 2:20 pm
Forum: Administrative Questions and Class Announcements
Topic: Multiple choice test?
Replies: 7
Views: 90

### Multiple choice test?

I was wondering if the entire test will be multiple choice because I heard that but wanted to confirm on this forum?
Mon Oct 19, 2020 2:17 pm
Forum: Properties of Light
Topic: Properties of photons
Replies: 4
Views: 39

### Re: Properties of photons

Your statement is correct and photons get their energy from their momentum rather from their mass because they still obey the equation E=pc.
Sun Oct 18, 2020 9:13 pm
Forum: Student Social/Study Group
Replies: 32
Views: 589

### Re: iPad vs Paper notes

I personally prefer using paper notes because it is more useful and helps me out to actually write it out with a pen and paper.
Sun Oct 18, 2020 9:12 pm
Forum: Administrative Questions and Class Announcements
Topic: Discussion Mandatory?
Replies: 4
Views: 31

### Re: Discussion Mandatory?

Discussions are not mandatory it seems for now because there is no work sheet to turn it but it is helpful and we will be taking the midterm/final during discussions
Thu Oct 15, 2020 11:16 pm
Forum: Administrative Questions and Class Announcements
Topic: Built-in webcams/Equipment request [ENDORSED]
Replies: 22
Views: 761

### Re: Built-in webcams/Equipment request[ENDORSED]

Yah and Iphone would be considered an external webcam but he said it is not suggested and a bit more complicated.
Wed Oct 14, 2020 12:01 pm
Forum: Student Social/Study Group
Replies: 4
Views: 89

I cant find the respondus link on the ccle page could someone link it below?
Wed Oct 14, 2020 11:26 am
Forum: Properties of Electrons
Topic: Analogy for Exciting Electrons?
Replies: 3
Views: 48

### Re: Analogy for Exciting Electrons?

I also thought that E=hv is the bridge but it also implies that it can stay between levels which is definitely not true it can only be at like n=1 or n=2. So just being cautious of that implication and you should be good.
Mon Oct 12, 2020 3:09 pm
Forum: Administrative Questions and Class Announcements
Topic: Respondus
Replies: 8
Views: 111

### Re: Respondus

Could not find it either because the syllabus says its online but someone in the community it says the 27th so I guess that day but if its during discussion wouldn't people be taking it on different days?
Thu Oct 08, 2020 3:33 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Moles vs molecules
Replies: 14
Views: 187

### Moles vs molecules

I was wondering what is the difference between moles and molecules are. I thought of this during a step up session because the ua asked for it but I was a bit confused on the conceptual definition of it. I know you have to like multiply by avogardros number and I searched it up online but was still ...
Tue Oct 06, 2020 4:36 pm
Forum: Administrative Questions and Class Announcements
Topic: Sapling Homework
Replies: 4
Views: 74

### Re: Sapling Homework

Oh I thought if you get it wrong over 5 times you get docked off because when I was about to give up it said I had 5 attempts.
Tue Oct 06, 2020 4:33 pm
Forum: Significant Figures
Topic: When are sig figs applied?
Replies: 12
Views: 111

### Re: When are sig figs applied?

I do the sig figs at the end of the problem in order to keep it accurate.
Tue Oct 06, 2020 1:18 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: E. 25
Replies: 3
Views: 66

### Re: E. 25

A formula unit is in a sense the chemical compound it seems with the least amount of elements so I thought of it as the simplest chemical compound and minimum number of elements in it. So it can also be called the empirical formula.
Tue Oct 06, 2020 1:15 pm
Forum: Photoelectric Effect
Topic: Photoelectric effect
Replies: 2
Views: 27

### Re: Photoelectric effect

Yah because it is measuring the electrons thus it needs the vacuum because the gas particles can affect the photoelectric effect by colliding with the electrons. This can mess up the experiment thus a vacuum is needed.
Mon Oct 05, 2020 5:40 pm
Forum: Significant Figures
Topic: Sig Figs
Replies: 11
Views: 143

### Sig Figs

How many sig figs would 0.003204 have? I assumed it would have four because the zeros before do not count but I just wanted to double check.