Search found 60 matches

by Britney Tran IJ
Sun Jan 17, 2021 11:26 pm
Forum: Ideal Gases
Topic: R Value
Replies: 15
Views: 32

Re: R Value

its a constant that will be given on the equations sheet! no need to memorize it
by Britney Tran IJ
Sun Jan 17, 2021 11:25 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ICE Box Units
Replies: 6
Views: 15

Re: ICE Box Units

you just have to convert it into molar concentration to find your k
by Britney Tran IJ
Sun Jan 17, 2021 5:10 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: midterms [ENDORSED]
Replies: 3
Views: 196

Re: midterms [ENDORSED]

Ziyan Peng 3A wrote:
Chem_Mod wrote:No class that day due to midterm. :-)


Hello :) Are there any accommodations in place for international students for the midterm like there is for the final? Thanks in advance!


I believe that there are accommodations for international students! The info should be on his syllabus.
by Britney Tran IJ
Sun Jan 17, 2021 5:08 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Temperature
Replies: 32
Views: 77

Re: Temperature

You would need to know whether the reaction is exothermic or endothermic, thus determining whether heat is a reactant or product within that rxn.
by Britney Tran IJ
Sun Jan 17, 2021 5:06 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: shifts left or right
Replies: 20
Views: 41

Re: shifts left or right

when the reaction shifts right, the production of products is being favored.
by Britney Tran IJ
Sun Jan 10, 2021 10:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Question about 14B Exams
Replies: 29
Views: 130

Re: Question about 14B Exams

yes, the 14b exams will take place during your lecture time
by Britney Tran IJ
Sun Jan 10, 2021 9:58 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 1 Assignment
Replies: 17
Views: 62

Re: Week 1 Assignment

sapling is mandatory! the first assignment is due next Sunday of week 2
by Britney Tran IJ
Sun Jan 10, 2021 9:57 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Le Chatelier's Principle
Replies: 9
Views: 35

Re: Le Chatelier's Principle

jessicaosuna_1F wrote:It's basically just a principle that tells us what the effects of different changes in conditions do the chemical equilibria.

this chart is super helpful tysm!
by Britney Tran IJ
Sun Jan 10, 2021 8:17 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: aqueous solutions
Replies: 9
Views: 25

Re: aqueous solutions

aqueous solutions can but solids/liquids cannot
by Britney Tran IJ
Sun Jan 10, 2021 8:16 pm
Forum: Ideal Gases
Topic: Advice on how to navigate Chem Community
Replies: 17
Views: 67

Re: Advice on how to navigate Chem Community

Quick links is really helpful when you need to find your previous posts, new posts, and other categories!
by Britney Tran IJ
Tue Dec 15, 2020 1:36 pm
Forum: Student Social/Study Group
Topic: Final Exam
Replies: 49
Views: 289

Re: Final Exam

I definitely felt rushed! I'm not confident in any of my answers either :(
by Britney Tran IJ
Tue Dec 15, 2020 1:33 pm
Forum: DeBroglie Equation
Topic: p
Replies: 19
Views: 155

Re: p

p is momentum or mass*velocity
by Britney Tran IJ
Tue Dec 15, 2020 1:32 pm
Forum: Student Social/Study Group
Topic: Curve
Replies: 29
Views: 204

Re: Curve

ni curve but he did say that 10 bonus points would be added to the finals grade
by Britney Tran IJ
Tue Dec 15, 2020 1:30 pm
Forum: General Science Questions
Topic: Passing Grade
Replies: 34
Views: 208

Re: Passing Grade

50% or better to get at least a C-
by Britney Tran IJ
Wed Dec 09, 2020 2:21 pm
Forum: General Science Questions
Topic: study methods/recs
Replies: 37
Views: 278

Re: study methods/recs

I recommend going over the UA worksheets and completing the textbook problems! I like to also watch different videos on topics that I don't have a clear understanding of.
by Britney Tran IJ
Sun Dec 06, 2020 11:04 pm
Forum: Administrative Questions and Class Announcements
Topic: last day of lecture
Replies: 12
Views: 93

Re: last day of lecture

Wednesday! review is on Friday
by Britney Tran IJ
Sun Dec 06, 2020 11:03 pm
Forum: Student Social/Study Group
Topic: Curve
Replies: 29
Views: 204

Re: Curve

there isn't a curve but I think the average will be adjusted in the end
by Britney Tran IJ
Sun Dec 06, 2020 10:25 pm
Forum: Biological Examples
Topic: naming [Co(NH3)3Cl3]
Replies: 5
Views: 42

Re: naming [Co(NH3)3Cl3]

1. name ligands and metal, put the ligands in alphabetical order
2. put the appropriate prefixes for the ligand according to the number present
3. find the oxidation number of the metal and put it in parenthesis next to the metal
4. add any cations or anions that may exist
by Britney Tran IJ
Sun Dec 06, 2020 10:20 pm
Forum: General Science Questions
Topic: midterm 2 answers
Replies: 26
Views: 269

Re: midterm 2 answers

you have to contact your ta! I think you can review over the problems that you missed on the midterm during their office hours
by Britney Tran IJ
Sun Dec 06, 2020 7:05 pm
Forum: Student Social/Study Group
Topic: final study
Replies: 42
Views: 156

Re: final study

my finals plan is to attend as many u.a sessions as I can and do the textbook problems again! I think I'm also going to go over the sapling hw questions as well.
by Britney Tran IJ
Sun Nov 29, 2020 10:03 pm
Forum: Sigma & Pi Bonds
Topic: Sapling Q #16
Replies: 14
Views: 102

Re: Sapling Q #16

Kat Stahl 1L wrote:I found a video that I thought was really helpful in this concept. Here it is!
https://www.youtube.com/watch?v=n2Z2tASz7Uk
Hope this helps you!

thank you so much for this resource! it definitely helped a lot
by Britney Tran IJ
Sun Nov 29, 2020 10:01 pm
Forum: General Science Questions
Topic: Finals
Replies: 39
Views: 362

Re: Finals

it will be cumulative of all of the materials we've learned so far
by Britney Tran IJ
Sun Nov 29, 2020 10:00 pm
Forum: Administrative Questions and Class Announcements
Topic: PeppermintMocha
Replies: 11
Views: 265

Re: PeppermintMocha

thank you so much! this is very helpful
by Britney Tran IJ
Sun Nov 29, 2020 1:57 am
Forum: Student Social/Study Group
Topic: Sampling Give Up Option
Replies: 12
Views: 95

Re: Sampling Give Up Option

I think you get partial credit put you will end up losing points!!
by Britney Tran IJ
Tue Nov 24, 2020 5:22 pm
Forum: Administrative Questions and Class Announcements
Topic: grades
Replies: 10
Views: 151

Re: grades

Dr. Lavelle said that a 50% is needed to pass, but I think the rest of the grades follow the same scale where 90-93% is an A-, 93-97% is an A, 97-100% is an A+, and the rest of the grades follow the same pattern? I'm not 100% sure but that's what I've been going off of. do you guys know if he will ...
by Britney Tran IJ
Sun Nov 22, 2020 10:42 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem 14B Enrollment
Replies: 27
Views: 304

Re: Chem 14B Enrollment

Darren1e wrote:Like the above question asked, did Dr. Lavelle mention that 14b will be asynchronous as well?

Im pretty sure it'll be the same as chem14a where the lectures are recorded but Im not sure!!
by Britney Tran IJ
Sun Nov 22, 2020 10:24 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 3d and 4s
Replies: 9
Views: 71

Re: 3d and 4s

Electrons will enter the 4s stage first before moving onto 3d because 4s has a lower energy, but 4s will be the first orbital to lose the electrons during ionization.
by Britney Tran IJ
Sun Nov 22, 2020 8:24 pm
Forum: Lewis Acids & Bases
Topic: Explanation of Lewis acids & Bases
Replies: 7
Views: 63

Re: Explanation of Lewis acids & Bases

Lewis acids are electron acceptors, and an easy way to remember that is the "acid" and "Acceptor" both start with a. Lewis acids are generally cations and they dont have lone pairs. Lewis bases are the donators, and they are usually anions and will maybe have lone pairs.
by Britney Tran IJ
Fri Nov 20, 2020 8:43 pm
Forum: Student Social/Study Group
Topic: grade worries
Replies: 110
Views: 1161

Re: grade worries

Constance Newell wrote:does anyone know if we will be able to review over the questions in midterm 1

I think someone said that you could review them during your t.a's office hours but I'm not too sure!! I would ask your t.a
by Britney Tran IJ
Thu Nov 19, 2020 5:57 pm
Forum: Octet Exceptions
Topic: Octet Rule Exceptions
Replies: 20
Views: 169

Re: Octet Rule Exceptions

https://courses.lumenlearning.com/bound ... ctet-rule/

this is a good resource that summarizes all of the exceptions!!
by Britney Tran IJ
Sun Nov 15, 2020 11:05 pm
Forum: Electronegativity
Topic: Sapling #15
Replies: 9
Views: 86

Re: Sapling #15

hydrogen bonding deals with hydrogen bonding with fluorine, oxygen, and nitrogen! An easy way to remember this is FON!
by Britney Tran IJ
Sun Nov 15, 2020 11:02 pm
Forum: Octet Exceptions
Topic: Radicals
Replies: 6
Views: 56

Re: Radicals

One thing in particular I think you should definitely know is that when deciding which atom a radical goes on, you have to consider electronegativity. It will always go on the atom that is least electronegative because that one will, of course, attract less electrons. So if you had a bond between C...
by Britney Tran IJ
Sun Nov 15, 2020 10:24 pm
Forum: Resonance Structures
Topic: bond length
Replies: 37
Views: 152

Re: bond length

nope but we do need to know the length of the bonds in regards to the number of bonds
by Britney Tran IJ
Sat Nov 14, 2020 10:52 pm
Forum: Lewis Structures
Topic: Nitrite vs Nitrate
Replies: 17
Views: 130

Re: Nitrite vs Nitrate

The difference between Nitrite and Nitrate is the number of Oxygen atoms they have. Nitrate=NO3 and Nitrite=NO2 both have a charge of -1. I don't know for sure whether we'll need it memorized, but he hasn't said we need to memorize it so I don't believe we do. Yep! My t.a said that the formula shou...
by Britney Tran IJ
Thu Nov 12, 2020 9:07 pm
Forum: Trends in The Periodic Table
Topic: increase in ionization energy
Replies: 4
Views: 44

increase in ionization energy

Hi there! I'm having a little trouble understanding why ionization energy increases as you go across a period. Any clarification would be greatly appreciated!!
by Britney Tran IJ
Sun Nov 08, 2020 10:42 pm
Forum: Lewis Structures
Topic: Lewis Acid vs. Lewis Base
Replies: 5
Views: 41

Re: Lewis Acid vs. Lewis Base

Carbon dioxide is a polar molecule that contains a carbon atom in the center that has a partial positive charge. This positive carbon atom attracts, and thus accepts, the lone electron pairs present in the two oxygen atoms with negative partial charges. For this reason, carbon dioxide is acting as ...
by Britney Tran IJ
Sun Nov 08, 2020 9:28 pm
Forum: Ionic & Covalent Bonds
Topic: Size of Bonds
Replies: 28
Views: 99

Re: Size of Bonds

Because double bonds have more electrons, there is a stronger attraction/pull so the length is shorter
by Britney Tran IJ
Sun Nov 08, 2020 9:18 pm
Forum: Ionic & Covalent Bonds
Topic: formal charge
Replies: 8
Views: 38

formal charge

Hi there! Could anyone explain what the importance of the formal charge is? I understand how to dine it but I'm not really sure what the values mean. Thank you!
by Britney Tran IJ
Sun Nov 08, 2020 12:54 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: bohr radius
Replies: 1
Views: 20

bohr radius

Did Prof.Lavelle go over the Bohr radius during lecture? It's mentioned in the textbook, but I'm not sure if it holds any importance for this class. Thank you!
by Britney Tran IJ
Thu Nov 05, 2020 1:55 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: two exceptions ( d orbital)
Replies: 2
Views: 32

two exceptions ( d orbital)

Hi there! During the lecture, Lavelle talked about how half full d^5 and full d^10 subshells have lower energy. I dont really understand the concept of this and how he used it to find the levels/orbitals for Cr and Co. I would appreciate any clarification on these two exceptions and the steps he too...
by Britney Tran IJ
Sun Nov 01, 2020 10:03 pm
Forum: SI Units, Unit Conversions
Topic: Sapling WEEK 4 #22
Replies: 5
Views: 56

Re: Sapling WEEK 4 #22

reva_bajjuri wrote:for this problem, would you use the 4 sig figs in the conversion from joules to electo volts or are those not significant figures?

I believe you would use the sig figs from the value given in the problem (0.0431). Therefore, your answer should have 3 sig figs.
by Britney Tran IJ
Sun Nov 01, 2020 10:00 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Avogadro constant
Replies: 16
Views: 154

Re: Avogadro constant

When a problem asks for the number of photons, atoms, e.t.c you would use Avogadro's number
by Britney Tran IJ
Sun Nov 01, 2020 9:59 pm
Forum: Significant Figures
Topic: When should I start looking at sig figs?
Replies: 31
Views: 231

Re: When should I start looking at sig figs?

like everyone said, I usually don't worry about sig figs until I have my final answer!
by Britney Tran IJ
Sun Nov 01, 2020 4:22 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Chem Community Posts
Replies: 10
Views: 61

Re: Chem Community Posts

any post works whether that is commenting or posting. you can check the status under your profile!
by Britney Tran IJ
Fri Oct 30, 2020 3:29 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: position units
Replies: 19
Views: 112

Re: position units

I would keep it in m so that it cancels out with velocity(m/s)
by Britney Tran IJ
Sun Oct 25, 2020 10:12 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Midterm 1 Prep
Replies: 9
Views: 85

Re: Midterm 1 Prep

Well I don't have an outline or a list of equations, but everything that we learned on Wednesday of week three and before that is fair game, which goes as far as the basics of orbitals. So in short, you should have a handle on these topics: Stoichiometry Unit conversion Dimensional Analysis Propert...
by Britney Tran IJ
Sun Oct 25, 2020 10:10 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Advice for studying
Replies: 92
Views: 2030

Re: Advice for studying

I've been doing all of the textbook problems and pre module quiz questions, and if I dont understand something I would go to peer sessions or rewatch the lectures! Khan academy is also really helpful.
by Britney Tran IJ
Sun Oct 25, 2020 8:27 pm
Forum: Einstein Equation
Topic: Scratch paper during the exam
Replies: 19
Views: 153

Re: Scratch paper during the exam

my ta said that it was fine just as long as they can see what you're writing!
by Britney Tran IJ
Tue Oct 20, 2020 5:03 pm
Forum: Properties of Light
Topic: textbook 1b.15
Replies: 1
Views: 39

textbook 1b.15

problem: The velocity of an electron that is emitted from a metallic surface by a photon is 3.6 3 103 km?s21. (a) What is the wavelength of the ejected electron? (b) No electrons are emitted from the surface of the metal until the frequency of the radiation reaches 2.50 * 10^16 Hz. How much energy i...
by Britney Tran IJ
Mon Oct 19, 2020 11:46 pm
Forum: DeBroglie Equation
Topic: Mass with Wavelike properties
Replies: 4
Views: 36

Re: Mass with Wavelike properties

During lecture, Dr.Lavelle said that a wave is more likely to have particle like behavior given if the mass is higher and the wavelength is smaller. I don't really understand this concept. Can someone explain?
by Britney Tran IJ
Sun Oct 18, 2020 10:33 pm
Forum: Einstein Equation
Topic: m vs nm
Replies: 66
Views: 433

Re: m vs nm

I think its usually written as nm but either is fine
by Britney Tran IJ
Sun Oct 18, 2020 10:26 pm
Forum: Properties of Light
Topic: Remembering EM spectrum
Replies: 6
Views: 62

Re: Remembering EM spectrum

During one of the step up sessions, the ua said that we'd only need to remember the visible light spectrum (ROYGBIV) but I'm not sure!
by Britney Tran IJ
Sun Oct 18, 2020 3:03 am
Forum: Properties of Light
Topic: HW 1A.3
Replies: 3
Views: 33

Re: HW 1A.3

Hi there! I think what part c is referring to is the slope! Once you draw it out, you can see that the slope of the wave is smaller after the frequency decreases.
by Britney Tran IJ
Sun Oct 18, 2020 2:12 am
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 203
Views: 1266

Re: How are you studying?

The audio visual videos and step up sessions are super helpful! I like to plan out which questions ill do for the week, and if I need any help I'll refer back to the textbook or go to office hours!
by Britney Tran IJ
Sat Oct 17, 2020 9:11 pm
Forum: Einstein Equation
Topic: Changing sign from neg to pos in E=hv
Replies: 4
Views: 30

Re: Changing sign from neg to pos in E=hv

Is the energy released from a photon always positive then?
by Britney Tran IJ
Sun Oct 11, 2020 9:05 pm
Forum: Empirical & Molecular Formulas
Topic: Sampling #9
Replies: 7
Views: 66

Re: Sampling #9

Hi. I was really lost too until someone explained it to me. So looking at the problem, the given information is that we have 1.000g of caproic acid. We have 2.275g of CO2 and 0.929g of H2O. Step one would be to find the carbon in CO2. In order to do this, you must take the molar mass of carbon (12....
by Britney Tran IJ
Sun Oct 11, 2020 6:10 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Rounding with basic calculator
Replies: 16
Views: 443

Re: Rounding with basic calculator

Hi there! so would it be better to round the number or just truncate it?
by Britney Tran IJ
Sun Oct 11, 2020 6:08 pm
Forum: Empirical & Molecular Formulas
Topic: Sapling Week 1 #8
Replies: 23
Views: 234

Re: Sapling Week 1 #8

I also just counted up all of the atoms as presented in the image and used the periodic table and molar masses of each element to find the amu!
by Britney Tran IJ
Thu Oct 08, 2020 12:35 am
Forum: Administrative Questions and Class Announcements
Topic: Posting on Chemistry Community
Replies: 7
Views: 63

Re: Posting on Chemistry Community

so the chemistry community posts are due on Sunday at midnight instead of Friday right?
by Britney Tran IJ
Tue Oct 06, 2020 9:19 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: E15
Replies: 6
Views: 73

E15

The molar mass of the metal hydroxide M(OH)2 is 74.10 g?mol21. What is the molar mass of the sulfide of this metal?

-can someone explain the steps to solving this? I went over the answer but I'm still a little confused.

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