Search found 43 matches

by VanessaZhu1K
Fri Dec 04, 2020 1:26 am
Forum: Naming
Topic: Ligand Names Table on Final
Replies: 10
Views: 35

Re: Ligand Names Table on Final

Yea, Lavelle did not mention that we could use that sheet in his email, so we are probably not allowed to.
by VanessaZhu1K
Fri Dec 04, 2020 1:25 am
Forum: Administrative Questions and Class Announcements
Topic: Textbook Issue
Replies: 4
Views: 37

Re: Textbook Issue

I was having trouble with that too! Thank you for the suggestion!
by VanessaZhu1K
Fri Dec 04, 2020 1:22 am
Forum: Administrative Questions and Class Announcements
Topic: Worksheets for final
Replies: 5
Views: 29

Re: Worksheets for final

Yea, I would only use the resources that Lavelle listed in his email, which, like stated above are a calculator, constants and equations sheet, periodic table, and scratch paper. The ligand sheet is probably not permitted.
by VanessaZhu1K
Sun Nov 29, 2020 9:31 pm
Forum: Resonance Structures
Topic: Dominant Contribution to Resonance Hybrid
Replies: 4
Views: 22

Re: Dominant Contribution to Resonance Hybrid

Yes, I think when you are just changing where the double bond is in the structure, all the resonance structure contribute equally to the resonace hybrid
by VanessaZhu1K
Sun Nov 29, 2020 9:24 pm
Forum: Administrative Questions and Class Announcements
Topic: Outlines for the Final
Replies: 11
Views: 39

Re: Outlines for the Final

Yea I think that all the 14A outlines will be covered for the final!
by VanessaZhu1K
Sun Nov 29, 2020 9:22 pm
Forum: Administrative Questions and Class Announcements
Topic: sapling
Replies: 4
Views: 24

Re: sapling

Yea! I think it is just for extra practice if you need it, not extra credit.
by VanessaZhu1K
Wed Nov 25, 2020 11:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem 14B
Replies: 5
Views: 49

Re: Chem 14B

Yea, like what was said before, I think that the Lavelle wants to have the lectures recorded like this quarter, but it depends on if he can get permission to do it again and if he doesn't get sick. But he did suggest not to have any other classes overlapping with chem just in case.
by VanessaZhu1K
Mon Nov 23, 2020 11:49 am
Forum: Administrative Questions and Class Announcements
Topic: Thanksgiving Discussion
Replies: 7
Views: 52

Thanksgiving Discussion

I know we will probably have a lecture on Friday, but if we have discussion on Friday, will it be canceled due to Thanksgiving or will we still have to attend?
by VanessaZhu1K
Sat Nov 21, 2020 6:21 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 7 Sapling
Replies: 12
Views: 69

Re: Week 7 Sapling

Yea, we do have sampling for week 7, but on CCLE it says week 7 and week 8 sampling it isn't due until sunday midnight of week 8
by VanessaZhu1K
Sat Nov 21, 2020 6:18 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 Grades
Replies: 6
Views: 105

Re: Midterm 2 Grades

Yea! I'm pretty sure we'll get our midterm grades by next week!
by VanessaZhu1K
Thu Nov 19, 2020 7:42 pm
Forum: Ionic & Covalent Bonds
Topic: Polar Covalent Bond
Replies: 8
Views: 42

Re: Polar Covalent Bond

How do you find the differences in the electronegativities? Is it based on where they are on the periodic table?
by VanessaZhu1K
Thu Nov 19, 2020 7:22 pm
Forum: Ionic & Covalent Bonds
Topic: Polar Covalent Bond
Replies: 8
Views: 42

Re: Polar Covalent Bond

Also for ion or nonpolar molecules. How can you tell from like the chemical formula which molecule is ionic or covalent and if there are partial charges or not.
by VanessaZhu1K
Thu Nov 19, 2020 7:17 pm
Forum: Ionic & Covalent Bonds
Topic: Polar Covalent Bond
Replies: 8
Views: 42

Polar Covalent Bond

How can you identify whether or not a covalent bond is polar or not? Are there certain elements that that always create polar covalent bonds? Thank you!
by VanessaZhu1K
Sun Nov 15, 2020 7:33 pm
Forum: General Science Questions
Topic: Midterm #2
Replies: 11
Views: 47

Re: Midterm #2

Yes, it covers the rest of Outline 2 and all of Outline 3!
by VanessaZhu1K
Sun Nov 15, 2020 7:30 pm
Forum: Resonance Structures
Topic: Sapling Weeks 5 and 6 # 3
Replies: 2
Views: 20

Re: Sapling Weeks 5 and 6 # 3

For that one, I has P in the middle and three oxygens single bonded to the phosphate. Each oxygen has three lone pair and a negative charge. The phosphate in the middle also has one lone pair.
by VanessaZhu1K
Sun Nov 15, 2020 5:58 pm
Forum: Lewis Structures
Topic: Number of Bonds for Elements
Replies: 3
Views: 22

Number of Bonds for Elements

Can someone explain how you know the number of bonds an element can have? I thought that nitrogen could only have three bonds but when doing sampling, they said it could have four. So I was wondering how you figure out the number of bonds an element can have? Thank you!
by VanessaZhu1K
Sat Nov 14, 2020 7:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Saving 14B for second enrollement
Replies: 4
Views: 53

Saving 14B for second enrollement

Is it better to enroll in 14B during the first enrollment or will it be okay to save it until the second enrollment? I'm not sure how fast the class will fill up and I want to see which is the better option. Thank you!
by VanessaZhu1K
Wed Nov 11, 2020 3:33 pm
Forum: Dipole Moments
Topic: Induced Dipole vs Dipole
Replies: 1
Views: 18

Induced Dipole vs Dipole

I was wondering what the difference was between induced dipole and dipole and why induced dipole has a weaker bond.

Thank you!
by VanessaZhu1K
Sun Nov 08, 2020 4:40 pm
Forum: Administrative Questions and Class Announcements
Topic: missing discussion
Replies: 8
Views: 52

Re: missing discussion

Yes, I agree that going to a step up or workshop session will be very helpful if you miss discussion. But I don't think missing discussion will have a negative impact on your grade.
by VanessaZhu1K
Sun Nov 08, 2020 4:37 pm
Forum: Bond Lengths & Energies
Topic: Delocalized Electrons
Replies: 5
Views: 33

Delocalized Electrons

Can someone explain what delocalized electrons are? I don't really understand. Thank you!
by VanessaZhu1K
Sun Nov 08, 2020 4:26 pm
Forum: Administrative Questions and Class Announcements
Topic: MIDTERM 2 Textbook Sections
Replies: 6
Views: 38

Re: MIDTERM 2 Textbook Sections

He also has outlines of the different topics on the class website and what textbook problems to complete for those topics. I assume for now that the second part of outline 2 and probably outline 3 will be on the second midterm. Maybe more but not sure yet.
by VanessaZhu1K
Sun Nov 08, 2020 4:20 pm
Forum: Administrative Questions and Class Announcements
Topic: Taking Bio and Chem simultaneously
Replies: 26
Views: 98

Re: Taking Bio and Chem simultaneously

I'm doing LS7C and chem 14a right now and I think that the homework for bio is definitely more time consuming. We have readings due before every class which can take a while to read, but the class itself isn't too challenging if you do the readings and understand the clicker questions in lecture. Bu...
by VanessaZhu1K
Mon Nov 02, 2020 1:26 pm
Forum: Lewis Structures
Topic: Lecture #14: SO4^2- Lewis Structure
Replies: 5
Views: 46

Lecture #14: SO4^2- Lewis Structure

Hi! Can someone explain for the SO4^2- Lewis Structure why S is able to have 6 bonds? Thank you!
by VanessaZhu1K
Sun Nov 01, 2020 5:59 pm
Forum: Quantum Numbers and The H-Atom
Topic: ml atomic number
Replies: 2
Views: 18

ml atomic number

Hi! Can someone explain what the ml atomic number represents and how many electrons are there?

Thank you!
by VanessaZhu1K
Sun Nov 01, 2020 5:55 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Different Types of Orbitals
Replies: 2
Views: 17

Different Types of Orbitals

Hi! I am a little confused about the different types of orbitals. Can someone summarize the differences between the s, p, d, and f orbitals?

Thank you!
by VanessaZhu1K
Thu Oct 29, 2020 1:29 am
Forum: DeBroglie Equation
Topic: Week 2,3,3 Sampling #25
Replies: 2
Views: 42

Week 2,3,3 Sampling #25

For 25, when finding the energy of the photon and electron, the solution gives two different ways to solve it. For the photon, they use E=hv and c=vλ and for electron, they used λ=h/p and e=1/2mv^2. I was wondering why they used the two different methods and how you know which equations work with th...
by VanessaZhu1K
Wed Oct 28, 2020 5:15 pm
Forum: Photoelectric Effect
Topic: Sampling #4
Replies: 3
Views: 32

Re: Sampling #4

Thank you!
by VanessaZhu1K
Wed Oct 28, 2020 5:03 pm
Forum: Photoelectric Effect
Topic: Sampling #4
Replies: 3
Views: 32

Sampling #4

Hi can someone help me solve this? I got the work function, but I don't understand how to do the second part. Thank you! When a metal was exposed to photons at a frequency of 1.23×1015 s−1, electrons were emitted with a maximum kinetic energy of 3.70×10−19 J. Calculate the work function, Φ, of this ...
by VanessaZhu1K
Sun Oct 25, 2020 8:37 pm
Forum: Administrative Questions and Class Announcements
Topic: Sampling HW Problems
Replies: 4
Views: 37

Sampling HW Problems

Are the sampling Hw problems in the correct order now or are they still shuffled randomly?
by VanessaZhu1K
Thu Oct 22, 2020 7:10 pm
Forum: General Science Questions
Topic: Using Equations for Problems
Replies: 3
Views: 40

Using Equations for Problems

I noticed that sometimes to solve a problem, you would need to combine one or two equations together to be able to get the answer. I was wondering if anyone had any advice to how to recognize when you need to do that. Also if anyone had any advice on how to know which equation should be used for whi...
by VanessaZhu1K
Wed Oct 21, 2020 3:53 pm
Forum: Administrative Questions and Class Announcements
Topic: Webcam for Midterms [ENDORSED]
Replies: 4
Views: 57

Webcam for Midterms [ENDORSED]

For the miderms, are we supposed to have two cameras for our face and our desk, or is it just one for our desk?
by VanessaZhu1K
Mon Oct 19, 2020 4:59 pm
Forum: DeBroglie Equation
Topic: Measurable Wavelike Properties
Replies: 4
Views: 30

Re: Measurable Wavelike Properties

Yes, thank you I realized he answered it later in the lecture, i just didn't watch far enough lol
by VanessaZhu1K
Mon Oct 19, 2020 4:51 pm
Forum: DeBroglie Equation
Topic: Measurable Wavelike Properties
Replies: 4
Views: 30

Measurable Wavelike Properties

Hi! I had a question about the example in class about if the car has any measurable wavelike properties. How do you know if it does or not? Is there a certain mass that the object cannot exceed in order for it to be considered to have wavelike properties or is it just that it has to be an extremely ...
by VanessaZhu1K
Sun Oct 18, 2020 9:51 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Atomic Spectra
Replies: 3
Views: 27

Atomic Spectra

Can someone help explain this? Thank you! The meter was defined in 1963 as 1,650,763.73 wavelengths of radiation emitted by krypton-86 (it has since been redefined). What is the wavelength of this krypton-86 radiation? To what region of the electromagnetic spectrum does this wavelength correspond (i...
by VanessaZhu1K
Sun Oct 18, 2020 9:48 pm
Forum: Administrative Questions and Class Announcements
Topic: Question about Midterms
Replies: 9
Views: 83

Re: Question about Midterms

Yea I think the one on the website should be okay
by VanessaZhu1K
Sun Oct 18, 2020 9:44 pm
Forum: Administrative Questions and Class Announcements
Topic: 14A website password
Replies: 3
Views: 26

14A website password

Does anyone remember the password for the 14A website? I looked everyone on CCLE and I don't remember where we got the password. Thank you!
by VanessaZhu1K
Sat Oct 17, 2020 5:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Question about Midterms
Replies: 9
Views: 83

Question about Midterms

I had a quick question about the midterms. Will we be allowed to have a printout of the periodic table for like molarity questions? Or will they be provided on the exam. Same with things like the speed of light, plank's constant, etc. Are we expected to memorize all of that? Or can we have a sheet w...
by VanessaZhu1K
Thu Oct 15, 2020 5:42 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect
Replies: 3
Views: 57

Photoelectric Effect

Hi! Can someone explain this? Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 105 m.s-1. The work function for sodium is 150.6 kJ.mol-1. Answer the following three questions. A. What is the kinetic energy of the ejected electron? B. How much energy is required to...
by VanessaZhu1K
Wed Oct 07, 2020 10:04 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molarity Calculation
Replies: 5
Views: 44

Molarity Calculation

Hi! Can someone explain how to solve this? Thank you!

A solution is prepared by dissolving 55.1 g of KCl in approximately 75 mL of water and then adding water to a final volume of 125 mL. What is the molarity of KCl(aq) in this solution?
by VanessaZhu1K
Wed Oct 07, 2020 1:18 am
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant Calculation
Replies: 2
Views: 74

Limiting Reactant Calculation

Hi! Can someone explain how to solve this? According to the following equation, 0.750 g of C6H9Cl3 is mixed with 1.000 kg of AgNO3 in a flask of water. A white solid, AgCl, completely precipitates out. What is the mass of AgCl produced? C6H9Cl3 + 3AgNO3 ---> AgCl + C6H9(NO3)3. Molar Mass: C6H9Cl3 (1...
by VanessaZhu1K
Wed Oct 07, 2020 1:13 am
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant Calculation
Replies: 5
Views: 69

Re: Limiting Reactant Calculation

Ohh okay! That makes sense. Thank you guys so much!
by VanessaZhu1K
Wed Oct 07, 2020 1:11 am
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 226
Views: 116435

Re: Advice from a Medical Student [ENDORSED]

Thank you so much for the advice! This was very helpful :)
by VanessaZhu1K
Mon Oct 05, 2020 5:50 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant Calculation
Replies: 5
Views: 69

Limiting Reactant Calculation

I don't really understand how to solve this? How do I compare the Co2 and CaCo3?

How many moles of CO2(g) are produced when 1 kg of CaCO3(s) is used to neutralize an acid spill? The equation for the reaction at 1 atm and 25 degrees C is:

CaCO3(s) + H2SO4(aq) ---> CaSO4(s) + CO2(g) + H2O(l)

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