Search found 53 matches

by Elizabeth Johnson 1I
Sun Dec 08, 2019 10:15 pm
Forum: Student Social/Study Group
Topic: Class Grading
Replies: 36
Views: 496

Re: Class Grading

lets pray there is a curve/grade shift
by Elizabeth Johnson 1I
Sun Dec 08, 2019 10:13 pm
Forum: Administrative Questions and Class Announcements
Topic: FINAL
Replies: 7
Views: 115

Re: FINAL

yeah dj ll was not chill at all for putting titrations on it
by Elizabeth Johnson 1I
Sun Dec 08, 2019 9:55 pm
Forum: Administrative Questions and Class Announcements
Topic: THE SONG DJ LL PLAYS AT THE BEGINNING OF CLASS [ENDORSED]
Replies: 7
Views: 562

Re: THE SONG DJ LL PLAYS AT THE BEGINNING OF CLASS [ENDORSED]

Nare Arakelian Dis 3E wrote:This is amazing

yeah, it is ¯\_(ツ)_/¯
by Elizabeth Johnson 1I
Sun Dec 08, 2019 9:44 pm
Forum: General Science Questions
Topic: 50 post grade
Replies: 17
Views: 240

Re: 50 post grade

I literally left this chem class being so excited about being done and i forgot about my posts so here I am still doing chem stuff smh
by Elizabeth Johnson 1I
Fri Dec 06, 2019 4:23 pm
Forum: Administrative Questions and Class Announcements
Topic: THE SONG DJ LL PLAYS AT THE BEGINNING OF CLASS [ENDORSED]
Replies: 7
Views: 562

THE SONG DJ LL PLAYS AT THE BEGINNING OF CLASS [ENDORSED]

it's Numb by Portishead
I found it out and thought it should be known by the general public that's all
by Elizabeth Johnson 1I
Tue Dec 03, 2019 3:43 pm
Forum: Student Social/Study Group
Topic: Grades
Replies: 14
Views: 152

Re: Grades

dr lavelle pls be a homie and make the class average at least a B
by Elizabeth Johnson 1I
Sun Dec 01, 2019 11:28 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: What to know for the final
Replies: 8
Views: 64

Re: What to know for the final

lol okay good bc I see stuff in chem community that I've never seen before and it always stresses me out so much
by Elizabeth Johnson 1I
Sun Dec 01, 2019 11:24 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate
Replies: 2
Views: 23

Re: Polydentate

yes that's exactly it. The ones Lavelle went over were bidentate (2 e pairs), tridentate (3 e pairs), and hexadentate (6 e pairs)
by Elizabeth Johnson 1I
Sun Dec 01, 2019 11:08 pm
Forum: Bronsted Acids & Bases
Topic: Water as an acid and base
Replies: 7
Views: 31

Re: Water as an acid and base

when we are talking about donating a proton, it's always in reference to hydrogen, correct?
by Elizabeth Johnson 1I
Sun Dec 01, 2019 10:56 pm
Forum: General Science Questions
Topic: Review Sessions for Final
Replies: 7
Views: 72

Re: Review Sessions for Final

It's a week before the final and there is no update on the website :/ not chill laurence
by Elizabeth Johnson 1I
Sun Dec 01, 2019 10:54 pm
Forum: General Science Questions
Topic: test taking nervousness
Replies: 19
Views: 152

Re: test taking nervousness

I think a really big part of relieving that feeling is affirming yourself that you did everything you could up until that point and you are as ready as you'll ever be for it. I always take 3 deep breaths before I start any test and find the problem I'm most confident in and start the test by working...
by Elizabeth Johnson 1I
Sun Nov 24, 2019 5:30 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Why are inorganic acids stronger?
Replies: 8
Views: 56

Re: Why are inorganic acids stronger?

Giselle Littleton 3K wrote:Inorganic compounds are more likely to completely deprotonate.


can someone define what deprotonate means?
by Elizabeth Johnson 1I
Sun Nov 24, 2019 5:28 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Molecular shape vs Electron Configuration
Replies: 4
Views: 22

Molecular shape vs Electron Configuration

I think I have a general understanding but what are the specific differences between molecular shape and electron configuration. Why do we even bother with the molecular shape? What are their respective significances?
by Elizabeth Johnson 1I
Sun Nov 24, 2019 5:26 pm
Forum: Biological Examples
Topic: cisplatin
Replies: 6
Views: 47

Re: cisplatin

Are we expected to know this stuff for the class or is this forum more just about entertaining curiosity?
by Elizabeth Johnson 1I
Sun Nov 24, 2019 5:22 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: What is a coordinate number?
Replies: 3
Views: 16

What is a coordinate number?

What is a coordinate number and how do we determine it?
by Elizabeth Johnson 1I
Sun Nov 24, 2019 5:21 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordinate covalent bonds
Replies: 5
Views: 29

Re: Coordinate covalent bonds

A ligand is an electronically rich species and must have 1 or more lone pairs
by Elizabeth Johnson 1I
Sun Nov 17, 2019 9:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR angles
Replies: 4
Views: 34

Re: VSEPR angles

Nare Arakelian Dis 3E wrote:Thank you so much!


i really appreciate you showing appreciation
by Elizabeth Johnson 1I
Sun Nov 17, 2019 9:45 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: This Week Test
Replies: 12
Views: 68

Re: This Week Test

Have we gone over sigma and pi bonds yet? Do we have any more information about what exact material will be tested? Lavelle said he would discuss sigma and pi bonds on Monday. ... so are sigma and pi bonds going to be on the test? I think the TAs said they were trying to have the tests done by Sund...
by Elizabeth Johnson 1I
Sun Nov 17, 2019 9:41 pm
Forum: *Liquid Structure (Viscosity, Surface Tension, Liquid Crystals, Ionic Liquids)
Topic: Viscosity
Replies: 15
Views: 100

Re: Viscosity

brennayoung wrote:Is there any practical application to viscosity like do yall know if there are any formulas that factor in viscosity or is it more just a property of certain substances to be aware of in general knowledge?


Yeah is this anything to bother with for the 2nd test?
by Elizabeth Johnson 1I
Sun Nov 17, 2019 9:39 pm
Forum: Bond Lengths & Energies
Topic: Test 2 Topics
Replies: 40
Views: 364

Re: Test 2 Topics

Yailin Romo 1B wrote:test covers material not covered on the midterm and up to Mondays lecture.


ooft I think my TA said until Friday's lecture; I guess we'll see tomorrow
by Elizabeth Johnson 1I
Sun Nov 17, 2019 9:38 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 4
Views: 30

Re: Bond Angles

honestly, I am just making flashcards and memorizing but if anyone has any tricks or like actual ways of solving, pleaaase share
by Elizabeth Johnson 1I
Sun Nov 10, 2019 11:34 pm
Forum: Bond Lengths & Energies
Topic: Test 2 Topics
Replies: 40
Views: 364

Re: Test 2 Topics

105311039 wrote:It will cover material from the midterm and on!


ah wait so are you saying that the material on the midterm is fair game?
by Elizabeth Johnson 1I
Sun Nov 10, 2019 11:32 pm
Forum: General Science Questions
Topic: Test 2
Replies: 20
Views: 141

Re: Test 2

This is semi-related but the final will be cumulative rather than just the 2nd half of the course, right?
by Elizabeth Johnson 1I
Sun Nov 10, 2019 11:31 pm
Forum: General Science Questions
Topic: Study Tips
Replies: 13
Views: 129

Re: Study Tips

I would do the online modules and go through the problems assigned for homework. I believe all of the questions will be taken from there, so it's almost like an exact study guide. Yeah this is probably the best way to study/learn material. I need to stop playing games and actually do all the questi...
by Elizabeth Johnson 1I
Sun Nov 10, 2019 11:22 pm
Forum: Formal Charge and Oxidation Numbers
Topic: central atom
Replies: 21
Views: 104

Re: central atom

You would want the formal charge on the central atom to be closer to zero because its supposed to be the least electronegative. this confuses me bc in our discussion, our TA gave the example of PCl5, which has a -1 charge. The lewis structure has the P in the middle with a formal charge of -1, but ...
by Elizabeth Johnson 1I
Sun Nov 10, 2019 11:17 pm
Forum: Dipole Moments
Topic: dipole
Replies: 4
Views: 34

Re: dipole

Dipoles are the partial negative and partial positive charges on molecules which have atoms with a notable difference in electronegativity. We can figure out if a molecule will have a dipole by calculating the difference in electronegativity between atoms. what is the cutoff for difference on elect...
by Elizabeth Johnson 1I
Sun Nov 03, 2019 11:22 pm
Forum: Lewis Structures
Topic: expanding an octect
Replies: 5
Views: 42

Re: expanding an octect

we won't have to expand an octet to 18 e on the midterm, right?
by Elizabeth Johnson 1I
Sun Nov 03, 2019 11:19 pm
Forum: Sigma & Pi Bonds
Topic: sigma and pi bonds question
Replies: 3
Views: 43

Re: sigma and pi bonds question

lol i'm happy to see that others are also having panic attacks about sigma and pi bonds but I think we're not going to see it on the midterm bc we've never talked about them
by Elizabeth Johnson 1I
Sun Nov 03, 2019 11:17 pm
Forum: Electronegativity
Topic: Ionic or covalent?
Replies: 17
Views: 109

Re: Ionic or covalent?

KeyaV3A wrote:If a compound is made from a metal and a non-metal, its bonding will usually be ionic and if it’s made from two non-metals, its bonding should be covalent


how do metalloids play into that, though?
by Elizabeth Johnson 1I
Sun Nov 03, 2019 11:15 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Showing Work
Replies: 6
Views: 42

Re: Showing Work

Not my TA, but Ben said that so long that he can follow the mental process you took to find the charge, you'll get full points. Definitely check in with your TA, though. TBH, my rec is to just do the FC equation. Better safe than sorry.
by Elizabeth Johnson 1I
Sun Nov 03, 2019 11:13 pm
Forum: Formal Charge and Oxidation Numbers
Topic: central atom
Replies: 21
Views: 104

Re: central atom

yes! If it's possible, you're going to want the charges to be on the surrounding atoms rather than the central atom. I honestly couldn't tell you exactly why it's better, but it's better to not have a localized charge.
by Elizabeth Johnson 1I
Sun Oct 27, 2019 10:56 pm
Forum: Resonance Structures
Topic: Midterm
Replies: 4
Views: 22

Re: Midterm

Let's pray to the chemistry gods that high school stuff will be on it for easier points lol
by Elizabeth Johnson 1I
Sun Oct 27, 2019 10:54 pm
Forum: Ionic & Covalent Bonds
Topic: Metals Vs. Nonmetals
Replies: 8
Views: 59

Re: Metals Vs. Nonmetals

How do metalloids play into this?
by Elizabeth Johnson 1I
Sun Oct 27, 2019 10:53 pm
Forum: Ionic & Covalent Bonds
Topic: What is the difference between an anion and cation?
Replies: 7
Views: 41

Re: What is the difference between an anion and cation?

this is a stupid way of remembering it, but I like cats so cations are positive and I dislike onions, so anions are negative
by Elizabeth Johnson 1I
Sun Oct 27, 2019 10:52 pm
Forum: Ionic & Covalent Bonds
Topic: Valence Electrons
Replies: 16
Views: 110

Re: Valence Electrons

Kimme Chun 1I wrote:For the s and p block, the number of valence electrons is the last number in the group. For the d block, you have to figure out the electron configuration to find how many electrons are in the outermost shell.

How do you figure out the electron configuration for d block elements?
by Elizabeth Johnson 1I
Sun Oct 27, 2019 10:16 pm
Forum: Ionic & Covalent Bonds
Topic: Bond lengths
Replies: 3
Views: 30

Re: Bond lengths

are we expected to know the bond lengths or is it safe to assume they will be given if needed?
by Elizabeth Johnson 1I
Sun Oct 27, 2019 10:07 pm
Forum: Properties of Electrons
Topic: What's the difference between a shell, a subshell, an energy level, and an orbital?
Replies: 8
Views: 60

Re: What's the difference between a shell, a subshell, an energy level, and an orbital?

Thank you all so much for replying! This clears so much up! :) Chem community pullin thru
by Elizabeth Johnson 1I
Sun Oct 20, 2019 10:37 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 4s vs. 3d
Replies: 6
Views: 35

Re: 4s vs. 3d

isn't it all about the number in the front? I honestly don't know why but that's what my TA said in our section lol
by Elizabeth Johnson 1I
Sun Oct 20, 2019 10:35 pm
Forum: Photoelectric Effect
Topic: The Work Function
Replies: 15
Views: 90

Re: The Work Function

Is the work function the same as the ionization energy then? No, work function is the energy required to remove an electron from a solid, like the metals we have been talking about in lecture. The ionization energy is the energy required to move an electron from an atom in the gas phase. oop there'...
by Elizabeth Johnson 1I
Sun Oct 20, 2019 10:34 pm
Forum: Photoelectric Effect
Topic: The Work Function
Replies: 15
Views: 90

Re: The Work Function

Nare Arakelian Dis 3E wrote:Is the work function the same as the ionization energy then?

bruh what is ionization energy
by Elizabeth Johnson 1I
Sun Oct 20, 2019 10:31 pm
Forum: Properties of Electrons
Topic: What's the difference between a shell, a subshell, an energy level, and an orbital?
Replies: 8
Views: 60

What's the difference between a shell, a subshell, an energy level, and an orbital?

I'm a little confused as to if some of these words are interchangeable or not. If you guys could define them and their differences from one another that would be amazing.
by Elizabeth Johnson 1I
Sun Oct 20, 2019 10:26 pm
Forum: Trends in The Periodic Table
Topic: Chemistry Community
Replies: 4
Views: 52

Re: Chemistry Community

i'd double check with your TA to see when they check but typically it's 11:59 on sunday
by Elizabeth Johnson 1I
Sun Oct 20, 2019 10:26 pm
Forum: Trends in The Periodic Table
Topic: Study Buddies?
Replies: 8
Views: 70

Re: Study Buddies?

yes please! my email is ejohnson2023@ucla.edu
by Elizabeth Johnson 1I
Sat Oct 12, 2019 3:24 pm
Forum: Administrative Questions and Class Announcements
Topic: When do we need our 5 posts done by?
Replies: 4
Views: 64

Re: When do we need our 5 posts done by?

Thanks Kev I appreciate you replying so quickly :)
by Elizabeth Johnson 1I
Sat Oct 12, 2019 3:22 pm
Forum: Empirical & Molecular Formulas
Topic: empirical = molecular?
Replies: 15
Views: 168

Re: empirical = molecular?

Tyler Angtuaco 1H wrote:This means that your answer is the molecular formula. If the ratio of its elements' atoms cannot be simplified further by the same positive, whole number ratio, then there is no empirical formula.

It can be both the empirical and molecular formula, so there is still an empirical formula :)
by Elizabeth Johnson 1I
Sat Oct 12, 2019 3:19 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 2795

Re: Test 1 [ENDORSED]

Can someone explain what Angstroms are? I was confused on the test on this question. That one confused me too! However, I realized that the conversions were on the front of the test on the resource page. 1 Angstrom is 10 -10 m. For that problem, you could use the conversions listed on the front of ...
by Elizabeth Johnson 1I
Sat Oct 12, 2019 3:15 pm
Forum: Student Social/Study Group
Topic: Turning in Extra HW problems
Replies: 10
Views: 112

Re: Turning in Extra HW problems

I'd say doing all the homework problems is the move, but if I was a TA I'd be annoyed if everyone gave me stapled papers with all their work rather than just one page with 5 problems that I could easily grade. My system so far has been just recopying the problems on a new piece or turning in a sheet...
by Elizabeth Johnson 1I
Sat Oct 12, 2019 3:11 pm
Forum: Administrative Questions and Class Announcements
Topic: When do we need our 5 posts done by?
Replies: 4
Views: 64

When do we need our 5 posts done by?

Are the 5 posts due by Friday? I heard they might be due by Sunday. I don't know. Our TA didn't know when we asked and I'm really not trying to lose points lol
by Elizabeth Johnson 1I
Thu Oct 03, 2019 12:06 am
Forum: Student Social/Study Group
Topic: Study Group Fall 2019
Replies: 32
Views: 1408

Re: Study Group Fall 2019

I definitely will be needing this! Does anyone know how to sign up for the step-up program or Peer Learning Sessions?
by Elizabeth Johnson 1I
Wed Oct 02, 2019 11:53 pm
Forum: Empirical & Molecular Formulas
Topic: Naming Molecular Compounds
Replies: 6
Views: 52

Re: Naming Molecular Compounds

I too am struggling with this! I think I'm going to review the Fundamentals Section D of Nomenclature to brush up on it. I don't think we'll be directly tested on it, so for the meantime, I think we're alright, but it definitely won't hurt us to get some extra practice.
by Elizabeth Johnson 1I
Wed Oct 02, 2019 11:50 pm
Forum: Significant Figures
Topic: When are zeroes significant in calculations?
Replies: 5
Views: 53

Re: When are zeroes significant in calculations?

The zeroes at the end of a number (past the decimal) signify more precision, so a measurement of 20.0000 ml (6 sig figs) is more precise than a measurement of 20.0 ml (three sig figs), even though to the layperson they would mean the same thing. A measurement of 20 ml would only have 1 sig fig. If i...
by Elizabeth Johnson 1I
Wed Oct 02, 2019 11:43 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student - Part II [ENDORSED]
Replies: 130
Views: 3403

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

This is so precious! Thank you for sharing your journey with us! We wish you the best :)
by Elizabeth Johnson 1I
Wed Oct 02, 2019 11:40 pm
Forum: SI Units, Unit Conversions
Topic: Diagnostic test for chem 17 vs 14A
Replies: 5
Views: 71

Re: Diagnostic test for chem 17 vs 14A

It's been a couple of weeks since I took the diagnostic test, but from what I remember, there was a proceeding page that had the results. I honestly don't think the diagnostic test is all too helpful in determining which class you should be in, though. A lot of us are feeling the same about being ru...

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