Search found 60 matches

by Brianna Brockman 1F
Sun Mar 17, 2019 6:46 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011788

Re: Post All Chemistry Jokes Here

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by Brianna Brockman 1F
Sun Mar 17, 2019 6:43 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011788

Re: Post All Chemistry Jokes Here

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by Brianna Brockman 1F
Sun Mar 17, 2019 6:43 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011788

Re: Post All Chemistry Jokes Here

tumblr_pf6bjokxQ81tv47luo1_400.jpg
tumblr_pf6bjokxQ81tv47luo1_400.jpg (13.5 KiB) Viewed 20320 times
by Brianna Brockman 1F
Sun Mar 17, 2019 6:36 pm
Forum: General Science Questions
Topic: SIG FIGS
Replies: 5
Views: 322

Re: SIG FIGS

It depends on what's given to you in the problem. If the probelm give you numbers with 3 sig figs, do three.
by Brianna Brockman 1F
Sun Mar 17, 2019 6:35 pm
Forum: General Science Questions
Topic: Rounding/ Significant Figures
Replies: 3
Views: 261

Re: Rounding/ Significant Figures

Lavelle does count sig figs in the final, but as far as the book, he has a list of book errors on his website.
by Brianna Brockman 1F
Sun Mar 17, 2019 6:33 pm
Forum: General Science Questions
Topic: sig figs
Replies: 4
Views: 243

Re: sig figs

I usually would do 3 sigs figs just to be safe.
by Brianna Brockman 1F
Sun Mar 17, 2019 6:32 pm
Forum: General Science Questions
Topic: Easy ways to remember
Replies: 5
Views: 265

Re: Easy ways to remember

I always remember "leo" for "lose electron: oxidation" and "lao" for "Left: anode: oxidation"
by Brianna Brockman 1F
Sun Mar 17, 2019 6:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Lavelle's other classes
Replies: 3
Views: 256

Lavelle's other classes

Does Professor Lavelle teach any other courses at UCLA besides 14a and 14b? He was a wonderful and fun professor so I was curious if I'd have the opportunity to take his classes again.
by Brianna Brockman 1F
Sun Mar 17, 2019 6:29 pm
Forum: Administrative Questions and Class Announcements
Topic: Picking up the Final
Replies: 2
Views: 223

Picking up the Final

What date next quarter will we be able to pick up our final, and where at?
by Brianna Brockman 1F
Sun Mar 17, 2019 6:28 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Grade Release Date?
Replies: 7
Views: 356

Re: Final Grade Release Date?

For 14a he had them up a week after the final, so I'd say before the beginning of next week.
by Brianna Brockman 1F
Sat Mar 16, 2019 10:01 pm
Forum: General Science Questions
Topic: Math question
Replies: 2
Views: 199

Re: Math question

To get something out of a log, you use the base of the log for each side and raise to the power of each side of the equation. So for log base ten, you would make each side an exponent with base 10. For your example, you would get 10^(logx) = 10^8. Since the base and the log base are the same, evert...
by Brianna Brockman 1F
Sat Mar 16, 2019 9:56 pm
Forum: Administrative Questions and Class Announcements
Topic: Test Location 14B W19
Replies: 3
Views: 245

Re: Test Location 14B W19

If you're E, you'll be in Moore 100, which is by Kerckhoff patio.
by Brianna Brockman 1F
Sat Mar 16, 2019 9:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Sig Figs
Replies: 9
Views: 299

Re: Sig Figs

I haven't heard exactly but I would expect that they will be watching them since this is the final. Tbh just make sure you're not giving a 10 digit answer when it's using 2 digit numbers and you should be fine.
by Brianna Brockman 1F
Sat Mar 16, 2019 9:54 pm
Forum: Administrative Questions and Class Announcements
Topic: Deadline to post
Replies: 7
Views: 291

Re: Deadline to post

Professor Lavelle said the deadline ends sunday.
by Brianna Brockman 1F
Sat Mar 16, 2019 9:53 pm
Forum: Administrative Questions and Class Announcements
Topic: Final
Replies: 18
Views: 508

Re: Final

The TAs said that the newer material will be more heavily emphasized but there will still be a portion of content on previous topics.
by Brianna Brockman 1F
Sat Mar 16, 2019 9:51 pm
Forum: Administrative Questions and Class Announcements
Topic: Final questions
Replies: 1
Views: 201

Final questions

How many questions will be on the final?
by Brianna Brockman 1F
Sat Mar 16, 2019 9:50 pm
Forum: Administrative Questions and Class Announcements
Topic: Past Finals
Replies: 4
Views: 257

Re: Past Finals

UCLA's test bank has a few, but I personally didn't find them very useful. He's changed his curriculum around since the most recent one was posted.
by Brianna Brockman 1F
Sun Mar 10, 2019 2:51 pm
Forum: General Science Questions
Topic: Math question
Replies: 2
Views: 199

Math question

Okay, I've been having a complete brain fart because it's been so long since I dealt with simple log functions. When converting say log x = 8, how do you solve for x? I can't remember exactly whether you use e, or if its a simple exponential function.
by Brianna Brockman 1F
Sun Mar 10, 2019 2:47 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 2 averages
Replies: 4
Views: 111

Test 2 averages

My TA didn't calculate the Test 2 averages, but I was wondering if anyone else's TA told them the average from test 2?
by Brianna Brockman 1F
Sun Mar 10, 2019 2:46 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm average
Replies: 5
Views: 137

Midterm average

Does anyone remember what the average score was on the midterm? I remember him saying it in class but I didn't write it down.
by Brianna Brockman 1F
Sun Mar 03, 2019 4:36 pm
Forum: Administrative Questions and Class Announcements
Topic: Class Curve
Replies: 11
Views: 528

Class Curve

I know there's no curve, but 50% is passing with a C-. How does the rest of the class grading balance out if a C- is 50%? is it 50-75% is a C- and then the rest, C-A+ follows a normal grading scale, or is it evened out to, say, 50-65% is a C scale, 66-80% is a B scale, etc etc?
by Brianna Brockman 1F
Sun Mar 03, 2019 4:33 pm
Forum: Balancing Redox Reactions
Topic: Oxidation number?
Replies: 12
Views: 217

Oxidation number?

Professor Lavelle briefly mentioned in lecture about knowing the oxidation number based on an element's location on the periodic table? What was he referring to? I never learned that in high school.
by Brianna Brockman 1F
Sun Mar 03, 2019 4:29 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 2 Scores
Replies: 6
Views: 101

Test 2 Scores

Does anyone know when we'll receive our scores for Test 2? My TA didn't say.
by Brianna Brockman 1F
Sun Feb 10, 2019 4:26 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 8
Views: 193

Re: Midterm

Everything up to entropy will be on the midterm, so Gibbs free energy is where the content stops.
by Brianna Brockman 1F
Sun Feb 10, 2019 4:22 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: ICE
Replies: 19
Views: 306

Re: ICE

E stands for equilibrium
by Brianna Brockman 1F
Wed Jan 30, 2019 6:16 pm
Forum: Phase Changes & Related Calculations
Topic: Test #1
Replies: 11
Views: 201

Re: Test #1

We should be. I got mine in discussion today, but it depends on your TA.
by Brianna Brockman 1F
Wed Jan 30, 2019 6:15 pm
Forum: Ideal Gases
Topic: Chemistry Community Posting
Replies: 7
Views: 151

Re: Chemistry Community Posting

The cutoff is on Sunday, So just post them whenever you can :)
by Brianna Brockman 1F
Wed Jan 30, 2019 6:14 pm
Forum: Ideal Gases
Topic: Q and K
Replies: 13
Views: 229

Re: Q and K

Since K is only for when it's at equilibrium, the value is only K IF it's at equilibrium. When it's not at equilibrium, it is Q.
by Brianna Brockman 1F
Thu Jan 10, 2019 11:20 am
Forum: Ideal Gases
Topic: Algebra
Replies: 5
Views: 78

Re: Algebra

P=(conc)RT becomes Conc=P/RT like this:

Becasue you want to get Conc alone, you divide both sides by RT. This makes RT cancel out on the side of concentration.

now you have Conc=P/RT
by Brianna Brockman 1F
Thu Jan 10, 2019 11:14 am
Forum: Student Social/Study Group
Topic: New to Lavelle
Replies: 32
Views: 3549

Re: New to Lavelle

practice the homework problems for sure and go to review sessions that the TAs hold! I also recommend personal tutoring, but it can take time to find one that you like that doesn't charge you $60 a session lol
by Brianna Brockman 1F
Thu Jan 10, 2019 11:12 am
Forum: Ideal Gases
Topic: Value of K
Replies: 6
Views: 101

Re: Value of K

K is a ratio of Products/Reactants (to think about it algebraically, say Products=a and Reactants=b). If K=1, then that means a/b=1, meaning a=b. If K>1, then a has to be greater than b in order to make the ratio larger than one, and if K<1, b has to be greater than a to make the ratio smaller.
by Brianna Brockman 1F
Wed Dec 05, 2018 1:19 pm
Forum: Administrative Questions and Class Announcements
Topic: Class Grading 2
Replies: 4
Views: 142

Re: Class Grading 2

Thank you so much! Idk why I wasn't seeing that when I read it haha
by Brianna Brockman 1F
Wed Dec 05, 2018 12:59 pm
Forum: Administrative Questions and Class Announcements
Topic: Class Grading 2
Replies: 4
Views: 142

Class Grading 2

Okay so I want to double check that this is true:
I was told that even though there is no curve in this class, a passing grade (C-) is 50%, or essentially a 250/500. Is this true? I can't find it stated in the syllabus and ya girl is hyper stressing about this final, so I need to know. Thank you.
by Brianna Brockman 1F
Tue Dec 04, 2018 11:53 am
Forum: Administrative Questions and Class Announcements
Topic: About the test
Replies: 8
Views: 289

About the test

All the stuff prior to the most recent test last week... can we assume that if it hasn't been tested in the tests or midterm that it won't be on the final? Or is literally everything fair game?
by Brianna Brockman 1F
Tue Dec 04, 2018 11:50 am
Forum: Lewis Structures
Topic: Elements that break the octet rule
Replies: 6
Views: 293

Elements that break the octet rule

So I know that Br, I, and P can break the octet rule in lewis structures, but I read that there are other elements that can do this too, like Cl occasionally. Which elements are we required to know that break the octet rule for this class?
by Brianna Brockman 1F
Fri Nov 16, 2018 12:33 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs in Molecular Shape
Replies: 4
Views: 101

Lone Pairs in Molecular Shape

So I want to make sure I understand this correctly: a lone pair in a molecule acts as though it's an atom when in terms of repelling other atoms and the shape, correct? If no, what are examples of times it doesn't behave like this?
by Brianna Brockman 1F
Fri Nov 16, 2018 12:29 pm
Forum: Student Social/Study Group
Topic: Study Group
Replies: 1
Views: 95

Study Group

Would anyone be interested in creating a study group? Preferably we'd meet once or twice a week on the Hill to do HW together and help each other understand topics.
by Brianna Brockman 1F
Fri Nov 16, 2018 12:27 pm
Forum: Student Social/Study Group
Topic: midterm average
Replies: 4
Views: 216

Re: midterm average

The average was 83%! Pretty high tbh
by Brianna Brockman 1F
Fri Nov 16, 2018 11:07 am
Forum: Student Social/Study Group
Topic: curve?
Replies: 20
Views: 1033

Re: curve?

My understanding is that there is no curve, but there will probably be a grade adjustment based on the class average. A curve would prohibit say, the bottom 10% of the class from passing, but an adjustment allows the entire class the opportunity to pass, no matter their rank in grade.
by Brianna Brockman 1F
Mon Nov 05, 2018 3:38 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 6 HOmework
Replies: 4
Views: 169

Week 6 HOmework

Since we have a midterm tonight, is there homework due this week?
by Brianna Brockman 1F
Fri Nov 02, 2018 2:38 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: f- orbital
Replies: 3
Views: 135

f- orbital

So on the periodic table, the s-, p-, and d- orbitals all correspond with a block of the periodic table. But I've noticed that some random elements use the f- orbital and I can't seem to figure out what the telltale sign is that they do. What block/part of the periodic table corresponds to the f- or...
by Brianna Brockman 1F
Fri Nov 02, 2018 2:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Cheat sheet or open notes? [ENDORSED]
Replies: 2
Views: 127

Cheat sheet or open notes? [ENDORSED]

In my last chem class we were allowed to make a three page "Cheat sheet" for the midterm and I heard someone mention that this test was going to be open note (even though I never heard the professor or TAs say so). So will either of these things be allowed in the midterm?
by Brianna Brockman 1F
Fri Nov 02, 2018 2:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Scantron
Replies: 6
Views: 148

Scantron

Will we need a scantron for the midterm?
by Brianna Brockman 1F
Fri Oct 26, 2018 3:21 pm
Forum: Ionic & Covalent Bonds
Topic: Calculating number of valence electrons in bonds
Replies: 5
Views: 88

Calculating number of valence electrons in bonds

In class the professor went over lewis dot structures and did some sort of calculation to calculate how many valence electrons were needed for the diagram, but his explanation confused me. How do you calculate how many electrons to depict in the dot structure?
by Brianna Brockman 1F
Fri Oct 26, 2018 3:18 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Tricks to remembering orbitals
Replies: 2
Views: 107

Tricks to remembering orbitals

When I took Chem before, there was a trick involving the periodic table that could help you tell what orbital the valence electrons were in and what order to follow the orbitals for, but I can't remember it nor can I find it mentioned anywhere. Is there/what is the trick to remembering and figuring ...
by Brianna Brockman 1F
Fri Oct 26, 2018 3:15 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Meaning of Z
Replies: 5
Views: 132

Re: Meaning of Z

Yeah, Z is the atomic number in this case
by Brianna Brockman 1F
Thu Oct 18, 2018 12:14 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: What exactly are nodes?
Replies: 1
Views: 46

What exactly are nodes?

In class the professor was talking about different orbitals and whether or not they have nodes or nodal planes. I understand which orbitals have them, but I don't actually understand what they are or what having them means.
by Brianna Brockman 1F
Thu Oct 18, 2018 12:11 pm
Forum: Administrative Questions and Class Announcements
Topic: Class Grading
Replies: 9
Views: 350

Class Grading

Will this class be graded on a curve like most STEM courses? I searched through the sylabus and didn't see anything about the grading scale, so I wanted to ask.
by Brianna Brockman 1F
Thu Oct 11, 2018 4:21 pm
Forum: Empirical & Molecular Formulas
Topic: Is it possible for the Empirical and Molecular formula to be the same? [ENDORSED]
Replies: 8
Views: 309

Is it possible for the Empirical and Molecular formula to be the same? [ENDORSED]

So I came across a problem recently that no matter how hard I tried, I kept getting the same answer for both the Empirical and Molecular formula. Ive never seen that before so... is that possible?
by Brianna Brockman 1F
Thu Oct 11, 2018 4:18 pm
Forum: Balancing Chemical Reactions
Topic: Test 1 and Future Tests
Replies: 5
Views: 319

Test 1 and Future Tests

So for balancing chemical equations, how much work is required to be shown to get credit? Because the way I was taught to solve them in high school is kinda like doing Soduku puzzles and I basicaclly do it all in my head. I wouldn't even know where to begin with "Showing my work."
by Brianna Brockman 1F
Thu Oct 11, 2018 4:08 pm
Forum: Balancing Chemical Reactions
Topic: How To....
Replies: 16
Views: 687

Re: How To....

You don't have to put the state of matter unless it asks you to, the way I understand it.
by Brianna Brockman 1F
Wed Oct 03, 2018 5:14 pm
Forum: Administrative Questions and Class Announcements
Topic: Grading for Chemistry Community [ENDORSED]
Replies: 6
Views: 224

Grading for Chemistry Community [ENDORSED]

So I keep hearing different responses from different people and I can't seem to find the answer on the syllabus or website: Do we have to have 3 posts for credit per week, or 1? I was originally told 3 by a classmate, but then another classmate said we only need 1...
by Brianna Brockman 1F
Wed Oct 03, 2018 4:31 pm
Forum: Significant Figures
Topic: Do sig figs only refer to decimals?
Replies: 3
Views: 65

Do sig figs only refer to decimals?

So I'm a little confused... Do sig figs refer only to the number of figures after a decimal point (say 1.02), or do they refer to the whole number, before and after the decimal? So would, say, the number 1.02 have 2 sig figs, or 3?
by Brianna Brockman 1F
Wed Oct 03, 2018 4:27 pm
Forum: Significant Figures
Topic: Sig Figs
Replies: 3
Views: 100

Re: Sig Figs

I think he might dock partial credit, but I doubt he'll significantly ding us. I took Chem 20a last year (long story) and my professor made no attempt to even teach us about sig figs or worry about it lol. Just try to be consistent.

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