Search found 46 matches

by Jchellis 1I
Sun Feb 10, 2019 10:49 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem 14 BL
Replies: 5
Views: 62

Re: Chem 14 BL

I know people who have even saved their chem labs until they completed the rest of the chem series and they said it was fine.
by Jchellis 1I
Sun Feb 10, 2019 10:47 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: DeltaU=q+w
Replies: 5
Views: 30

Re: DeltaU=q+w

Yes but q is energy lost as heat it does no work.
by Jchellis 1I
Sun Feb 10, 2019 10:45 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Systems
Replies: 5
Views: 33

Re: Systems

More examples could be a cup (open), a jar (closed), and a cooler (insulated).
by Jchellis 1I
Sun Feb 03, 2019 10:57 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 3
Replies: 9
Views: 117

Re: Test 3

We only have two tests this quarter for 14B though, right? Wasn't it changed?
by Jchellis 1I
Sun Feb 03, 2019 10:56 pm
Forum: Administrative Questions and Class Announcements
Topic: Homework
Replies: 5
Views: 256

Re: Homework

You can do the homework on anything that we have covered, whatever you feel like you need to review the most.
by Jchellis 1I
Sun Feb 03, 2019 10:54 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 1 Solutions
Replies: 3
Views: 44

Re: Test 1 Solutions

I don't think Lavelle gives solutions for the tests but I'm sure you could review it with your TA during office hours.
by Jchellis 1I
Sun Feb 03, 2019 10:53 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Review
Replies: 14
Views: 98

Re: Midterm Review

I know sometimes Lavelle dedicates a class or two to review as well as the provided sessions from the TAs.
by Jchellis 1I
Sun Jan 27, 2019 10:35 pm
Forum: Phase Changes & Related Calculations
Topic: reversible/irreversible
Replies: 8
Views: 42

Re: reversible/irreversible

Is combustion even reversible with added energy?
by Jchellis 1I
Sun Jan 27, 2019 10:34 pm
Forum: Phase Changes & Related Calculations
Topic: Phase changes
Replies: 14
Views: 77

Re: Phase changes

Yes, I believe if it gives off heat it would be negative delta H.
by Jchellis 1I
Sun Jan 27, 2019 10:32 pm
Forum: Phase Changes & Related Calculations
Topic: Steam v. Boiling Water
Replies: 4
Views: 26

Re: Steam v. Boiling Water

So both creating steam and boiling water are exothermic?
by Jchellis 1I
Mon Jan 21, 2019 9:23 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Salt
Replies: 4
Views: 37

Re: Salt

I thought that salt was usually a product?
by Jchellis 1I
Mon Jan 21, 2019 9:21 pm
Forum: Ideal Gases
Topic: ice
Replies: 4
Views: 52

Re: ice

How do we know if the acid is too strong for an ICE table?
by Jchellis 1I
Mon Jan 21, 2019 9:17 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Pressure
Replies: 8
Views: 62

Re: Pressure

Can the Q value change if the pressure is changed?
by Jchellis 1I
Sun Jan 13, 2019 8:44 pm
Forum: Ideal Gases
Topic: ICE Table
Replies: 4
Views: 32

Re: ICE Table

Do we only use the ICE table when dealing with homogeneous reactions?
by Jchellis 1I
Sun Jan 13, 2019 8:43 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: K vs Q [ENDORSED]
Replies: 7
Views: 83

Re: K vs Q [ENDORSED]

So can there be only one value for K but multiple values for Q as the reaction progresses?
by Jchellis 1I
Sun Jan 13, 2019 8:40 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: solids and liquids
Replies: 4
Views: 36

Re: solids and liquids

So because they are constants they have no effect on whether the reaction favors the reactants or the products?
by Jchellis 1I
Sat Dec 08, 2018 7:47 pm
Forum: General Science Questions
Topic: Audio Visuals
Replies: 6
Views: 108

Re: Audio Visuals

There are even Khan Academy videos for quantum on youtube that go beyond the basic stuff.
by Jchellis 1I
Thu Dec 06, 2018 4:08 pm
Forum: Administrative Questions and Class Announcements
Topic: Instructor Evaluations
Replies: 4
Views: 60

Re: Instructor Evaluations

Is this worth points?
by Jchellis 1I
Thu Dec 06, 2018 4:07 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent Structures
Replies: 12
Views: 81

Re: Bent Structures

How do we know the bond angles of bent structures?
by Jchellis 1I
Thu Dec 06, 2018 4:06 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: polarity
Replies: 11
Views: 59

Re: polarity

To check the symmetry of a Lewis Structure you can draw a line down the middle for a simple test
by Jchellis 1I
Thu Dec 06, 2018 4:04 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Drawing trigonal planar
Replies: 4
Views: 33

Re: Drawing trigonal planar

It can be helpful conceptually if you know how to draw them but they are not required on tests.
by Jchellis 1I
Thu Dec 06, 2018 4:03 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone electron
Replies: 1
Views: 15

Lone electron

Is it possible to have a lone electron? or would that be a free radical?
by Jchellis 1I
Thu Dec 06, 2018 4:02 pm
Forum: Administrative Questions and Class Announcements
Topic: How to find my posts
Replies: 28
Views: 15269

Re: How to find my posts

After you post you can also see the number of posts you have made next to your ID if you need to keep track.
by Jchellis 1I
Thu Dec 06, 2018 4:01 pm
Forum: Administrative Questions and Class Announcements
Topic: Practice/Final Studying
Replies: 2
Views: 66

Re: Practice/Final Studying

If you search the exact class name or add ucla to your search sometimes you can find ones made by other students in the class. Usually you can see the date when it was made too which is helpful.
by Jchellis 1I
Thu Dec 06, 2018 4:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam
Replies: 22
Views: 230

Re: Final Exam

Is he going to emphasize the material after the midterm more or will it be more equal?
by Jchellis 1I
Thu Dec 06, 2018 3:58 pm
Forum: Administrative Questions and Class Announcements
Topic: Naming on the Final
Replies: 4
Views: 77

Re: Naming on the Final

Di you think naming will be emphasized much on the final as we just learned it in the last few days?
by Jchellis 1I
Thu Dec 06, 2018 3:57 pm
Forum: Administrative Questions and Class Announcements
Topic: Modules
Replies: 3
Views: 37

Re: Modules

After we finished basic high school review I found sites like Khan academy didn't have as many helpful review videos. I think your best bet would probably be to just search YouTube for other lectures.
by Jchellis 1I
Thu Dec 06, 2018 3:55 pm
Forum: Hybridization
Topic: lone pairs
Replies: 20
Views: 108

Re: lone pairs

Lone pairs count just as much as an atom for a region of electron density
by Jchellis 1I
Thu Dec 06, 2018 3:52 pm
Forum: Dipole Moments
Topic: Polarity
Replies: 7
Views: 57

Re: Polarity

If the molecule has no lone pairs then you can tell if it is polar based off of its electronegativity
by Jchellis 1I
Thu Dec 06, 2018 3:49 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 3
Replies: 4
Views: 61

Re: Test 3

If we were not able to get ours back do you think the scores will be posted online in time for the final?
by Jchellis 1I
Thu Dec 06, 2018 3:48 pm
Forum: Administrative Questions and Class Announcements
Topic: About the test
Replies: 8
Views: 115

Re: About the test

He did say that there were only going to be 8 questions on the test though, so they must be multi-layered
by Jchellis 1I
Sun Nov 04, 2018 9:41 pm
Forum: Quantum Numbers and The H-Atom
Topic: degeneracy in quantum numbers
Replies: 3
Views: 45

Re: degeneracy in quantum numbers

So the s block has one degeneracy, the p block has 3, the d block has 5 and the f block has 10
by Jchellis 1I
Sun Nov 04, 2018 9:40 pm
Forum: Electronegativity
Topic: electronegativity vs electron affinity
Replies: 4
Views: 40

Re: electronegativity vs electron affinity

I don't know how correct this advice I was given is, but I was told by another Chem14A TA that we don't really need to know the concepts behind why they are different in order to do the problems we are given in the Chem14 series.
by Jchellis 1I
Sun Nov 04, 2018 9:38 pm
Forum: DeBroglie Equation
Topic: Kg vs Grams
Replies: 6
Views: 134

Re: Kg vs Grams

Kg is an SI unit so always convert to Kg
by Jchellis 1I
Sun Oct 28, 2018 8:55 pm
Forum: Quantum Numbers and The H-Atom
Topic: Test #2
Replies: 3
Views: 76

Re: Test #2

How many degeneracies can there be?
by Jchellis 1I
Sun Oct 28, 2018 8:33 pm
Forum: General Science Questions
Topic: Khan Academy
Replies: 10
Views: 213

Re: Khan Academy

I have heard that the Khan Academy AP Chem review videos and problem sets are very helpful.
by Jchellis 1I
Sun Oct 28, 2018 8:28 pm
Forum: General Science Questions
Topic: BruinCast [ENDORSED]
Replies: 4
Views: 225

Re: BruinCast [ENDORSED]

The AV modules are a great tool though if you are looking for something like a bruincast to review the material.
by Jchellis 1I
Sun Oct 28, 2018 8:27 pm
Forum: General Science Questions
Topic: Workshops
Replies: 3
Views: 129

Re: Workshops

The workshops are also often on the Hill (in Covel), so they are super convenient if you live in the dorms.
by Jchellis 1I
Sun Oct 21, 2018 8:19 pm
Forum: Properties of Electrons
Topic: ml
Replies: 5
Views: 83

Re: ml

I also have this problem with the different v's that all have different meanings. Is there any way you write yours so you don't mess up?
by Jchellis 1I
Sun Oct 21, 2018 8:16 pm
Forum: Properties of Light
Topic: Equations
Replies: 6
Views: 66

Re: Equations

Will the constants be given as well?
by Jchellis 1I
Sun Oct 21, 2018 8:14 pm
Forum: Einstein Equation
Topic: Units
Replies: 10
Views: 180

Re: Units

Its important to remember that we use kg instead of grams for SI units. I know I always forget!
by Jchellis 1I
Mon Oct 15, 2018 4:15 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 76
Views: 25360

Re: Reading the textbook [ENDORSED]

I am a very visual learner so watching videos online also really helps me. Also, with videos you can pause them and rewind, which you can't do in lecture, but its a little more engaging than the textbook.
by Jchellis 1I
Mon Oct 15, 2018 4:13 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 86
Views: 25263

Re: Advice from a Medical Student [ENDORSED]

Thank you! It is so great to know that these notes will be helpful later.
by Jchellis 1I
Sat Oct 06, 2018 11:30 am
Forum: Administrative Questions and Class Announcements
Topic: Tutoring? [ENDORSED]
Replies: 38
Views: 19544

Re: Tutoring? [ENDORSED]

If you are a second year taking this class you probably already know people who took the class freshman year. It's not a bad idea to ask around to see if any of your friends are willing to help you out/tutor you because they see you all the time/can hold you accountable.
by Jchellis 1I
Sat Oct 06, 2018 11:28 am
Forum: Administrative Questions and Class Announcements
Topic: Registering/Creating Your Chemistry Community Account
Replies: 17
Views: 15284

Re: Registering/Creating Your Chemistry Community Account

How do we know that our TA will see our posts? Should we email them our alias?
by Jchellis 1I
Sat Oct 06, 2018 11:23 am
Forum: SI Units, Unit Conversions
Topic: Avogadro's Number [ENDORSED]
Replies: 11
Views: 312

Re: Avogadro's Number [ENDORSED]

So when asked for atoms of a molecule we can multiply by the mols by Avogadro's number to get number of atoms, but I do not understand how to get molecules from mols?

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