I think it's on everything that wasn't on the midterm that we learned before the midterm + what we learned after the midtermKSong_3C wrote:I think it’s just everything we learn after the midterm!
Search found 35 matches
- Sun Nov 17, 2019 11:23 pm
- Forum: Bond Lengths & Energies
- Topic: Test 2 Topics
- Replies: 40
- Views: 2051
Re: Test 2 Topics
- Sun Nov 17, 2019 11:18 pm
- Forum: Student Social/Study Group
- Topic: Study Tips
- Replies: 58
- Views: 4297
Re: Study Tips
For the current VSEPR material, I found that flashcards were helpful in learning the various molecule configurations and shapes, so I'd have to recommend those
- Sun Nov 17, 2019 11:08 pm
- Forum: Student Social/Study Group
- Topic: Bond Angles
- Replies: 6
- Views: 485
Re: Bond Angles
I think we need to know relatively, but not the exact figure
- Sun Nov 17, 2019 10:57 pm
- Forum: Trends in The Periodic Table
- Topic: electron affinity
- Replies: 7
- Views: 644
Re: electron affinity
Electron affinity increases as you go up and to the right of the periodic table
- Sun Nov 17, 2019 10:54 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Double and triple bonds
- Replies: 4
- Views: 304
Re: Double and triple bonds
Because the bonding pairs in the double/triple bond are sharing the same region of electron density around the same two positive poles, the pairs are forced to occupy the same region of electron density.
- Sun Nov 10, 2019 9:08 pm
- Forum: Electronegativity
- Topic: ionic character
- Replies: 9
- Views: 623
Re: ionic character
Lauren Sanchez 3D wrote:So if the difference in electronegativity is greater than 2, then the bond is ionic?
Yes. An ionic bond is any bond with a delta greater than 2 between the electronegativities of the two bonding elements.
- Sun Nov 10, 2019 9:05 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: Test 2
- Replies: 6
- Views: 349
Re: Test 2
I'm going to ask in my discussion section this week but I'm fairly certain it's only on post-midterm topics.
- Sun Nov 10, 2019 8:58 pm
- Forum: Student Social/Study Group
- Topic: chem 14b + cehm14bl
- Replies: 9
- Views: 666
Re: chem 14b + cehm14bl
I don't know personally, but if the CHEM14 series is a part of your major requirements, it may make sense for you to ask to meet with your departmental advisor for a half-hour, as they should have a good sense of what works better for students and what doesn't. Just my $.02
- Sun Nov 10, 2019 8:45 pm
- Forum: Lewis Structures
- Topic: Electronegative
- Replies: 14
- Views: 799
Re: Electronegative
Electronegativity increases as you go up and to the right of the periodic table until the final Group 18 (Noble Gases). Group 18 is all the way to the right of the periodic table, except all of these have stable valence shells so their electronegativity is a much lower value than the proceeding grou...
- Sun Nov 10, 2019 8:42 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: Boiling point
- Replies: 5
- Views: 343
Re: Boiling point
The bond type doesn't necessarily contribute to boiling point, but the IMFs associated with certain bonds do. For instance, ionic salts like NaCl have strong ion-ion forces which give it its high boiling point because it requires a lot of energy in the form of heat to overcome these forces. F 2 is ...
- Sun Nov 03, 2019 10:48 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterms
- Replies: 6
- Views: 405
Re: Midterms
Good luck everyone!!!
- Sun Nov 03, 2019 10:47 pm
- Forum: Administrative Questions and Class Announcements
- Topic: study guide
- Replies: 2
- Views: 230
Re: study guide
I found the syllabus goes lists every topic that is covered in each unit, which might be helpful in figuring out what will be on the midterm
- Sun Nov 03, 2019 10:42 pm
- Forum: Dipole Moments
- Topic: Dipole, midterm?
- Replies: 7
- Views: 455
Re: Dipole, midterm?
I believe so, yes
- Sun Nov 03, 2019 10:41 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: How to know where a double bond should go?
- Replies: 10
- Views: 1088
Re: How to know where a double bond should go?
Cl generally does not want to form double bonds with C because Cl has 7 valence electrons and just needs one additional bond to attain an octet
- Sun Nov 03, 2019 10:39 pm
- Forum: Administrative Questions and Class Announcements
- Topic: slides
- Replies: 4
- Views: 336
Re: slides
I looked through his website and didn't find them, but this would be a helpful review tool
- Sun Oct 27, 2019 9:19 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configurations for Exceptions
- Replies: 2
- Views: 284
Re: Electron Configurations for Exceptions
Yes, I believe those are correct, according to what I could find on Google
- Sun Oct 27, 2019 9:11 pm
- Forum: Electronegativity
- Topic: Electronegativity
- Replies: 6
- Views: 540
Re: Electronegativity
I think it's the highest electronegativity because it is at the top right of the periodic table. Halogen's are known for being very reactive because of their valence shell being one electron away from a full octet. Although Neon is further right on the table, it is a noble gas, which are nonreactive...
- Sun Oct 27, 2019 8:59 pm
- Forum: *Black Body Radiation
- Topic: What is it?
- Replies: 6
- Views: 583
Re: What is it?
He mentioned that in lectures although he said it is not a part of our syllabus! It is essentially bodies that absorb/emit all frequencies therefore would be essentially invisible. If you are interested in reading more into this topic, I found this simplified wikipedia article helpful in understand...
- Sun Oct 27, 2019 8:42 pm
- Forum: Sigma & Pi Bonds
- Topic: Sigma vs. Pi
- Replies: 11
- Views: 1609
Re: Sigma vs. Pi
Simran Athwal-Dis 3A wrote:Is it true that for every double bond, there is one pi bond and for every triple bond, there are 2 pi bonds?
Yes.
Single bond = 1 sigma bond, 0 pi bonds
Double bond= 1 sigma bond, 1 pi bond
Triple bond= 1 sigma bond, 2 pi bonds
- Sun Oct 27, 2019 8:40 pm
- Forum: Resonance Structures
- Topic: Delocalization
- Replies: 6
- Views: 382
Re: Delocalization
It means that one or more of the electrons in a molecule's bond is not strictly limited to being shared between two atoms. I see "delocalized" as meaning it is a rogue electron (i.e. it moves between the atoms more fluidly/is not strictly limited to one bonding pair of atoms). This can be ...
- Sun Oct 20, 2019 8:49 pm
- Forum: DeBroglie Equation
- Topic: EM Radiation and DeBroglie Equation
- Replies: 3
- Views: 255
Re: EM Radiation and DeBroglie Equation
Callum Guo 1A wrote:i don't think theres a consensus about that, it's a weird property of light to have momentum but not mass. Heres an article that I read online: http://www.desy.de/user/projects/Physic ... _mass.html
Thank you so much for sharing this, I'd been wondering about this myself :)
- Sun Oct 20, 2019 8:45 pm
- Forum: Photoelectric Effect
- Topic: Speed of Light
- Replies: 29
- Views: 1460
Re: Speed of Light
For the purposes of this class I think we're best off using the value given to us on Lavelle's equation sheet
- Sun Oct 20, 2019 8:36 pm
- Forum: Photoelectric Effect
- Topic: The Work Function
- Replies: 15
- Views: 968
Re: The Work Function
I agree with everything posted so far, but I think for clarification it should be noted that the work function of a particular metal is not dependent on the intensity of the light, but rather the individual energy of each photon. Essentially, an electron can only be emitted from the metal if the ene...
- Sun Oct 20, 2019 8:20 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: s-, p-, d- ,f- orbitals
- Replies: 10
- Views: 458
Re: s-, p-, d- ,f- orbitals
Thank you for the clarification. This is helpful :)
- Sun Oct 20, 2019 8:01 pm
- Forum: SI Units, Unit Conversions
- Topic: Calculate using kg or g?
- Replies: 13
- Views: 808
Re: Calculate using kg or g?
In my experience with high school chem + this course, it seems like chemistry calculations tend to be mostly done with grams. If they specifically ask you to provide an answer with another unit of mass, use that unit, but generally grams are the unit of measure used.
- Sun Oct 13, 2019 2:05 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: First Test Result
- Replies: 5
- Views: 271
Re: First Test Result
Good luck everyone!
- Sun Oct 13, 2019 2:04 pm
- Forum: Properties of Light
- Topic: EM waves
- Replies: 3
- Views: 132
Re: EM waves
Despite lacking mass, the release of a photon and its inherent energy results in a change in the magnetic field of the surrounding area. In QM, energy released by a photon is directly linked to a change in the magnetic field along the path of the ejected photon.
- Sat Oct 12, 2019 4:05 pm
- Forum: Properties of Light
- Topic: Constructive & Destructive
- Replies: 4
- Views: 108
Re: Constructive & Destructive
For destructive interference, would it be possible for the two waves to be equal to each other so that they cancel out or does the “negative” have to be smaller than the “positive” wave? Yes. A good real life example that helped me better conceptualize this can be found in how noise-cancelling head...
- Sat Oct 12, 2019 3:26 pm
- Forum: Student Social/Study Group
- Topic: Chemistry News
- Replies: 135
- Views: 163674
Re: Chemistry News
This article discusses how integral chemistry is to the field of art restoration
https://nuscimag.com/the-chemistry-of-art-restoration-1a034a8525c2
https://nuscimag.com/the-chemistry-of-art-restoration-1a034a8525c2
- Sat Oct 12, 2019 3:22 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Wavelength Plausibility
- Replies: 31
- Views: 2571
Re: Wavelength Plausibility
Thank you for the clarification!
- Fri Oct 04, 2019 12:06 am
- Forum: Limiting Reactant Calculations
- Topic: Percent or theoretical yield
- Replies: 14
- Views: 1251
Re: Percent or theoretical yield
Hello there! They are two separate things, although they are related. The percent yield is calculated by taking the mass of the actual yield (result of an experiment) divided by the mass of the theoretical yield. Then, one would multiply by 100% to express the percent yield. Basically, the percent y...
- Thu Oct 03, 2019 9:35 pm
- Forum: SI Units, Unit Conversions
- Topic: Book Access Issues
- Replies: 3
- Views: 148
Re: Book Access Issues
I was worried about this issue. Thank you so much for the fix :)
- Thu Oct 03, 2019 9:31 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 146821
Re: Reading the textbook
I find that reading the textbook can help, however normally I like to supplement reading the textbook by also looking up the concept online/reading an internet explanation/watching Khan Academy videos. I think combining resources is the most effective way to gather information on a topic, especially...
- Thu Oct 03, 2019 5:26 pm
- Forum: Properties of Electrons
- Topic: Expectations
- Replies: 4
- Views: 278
Re: Expectations
With regards to our fundamental and quantum understanding of electrons, I think it's important to point out a flaw that seems to have permeated throughout our education system. For me at least, I grew up being told that electrons were spherical in nature and orbited around the nucleus on set courses...
- Thu Oct 03, 2019 4:55 pm
- Forum: Student Social/Study Group
- Topic: Final Jitters
- Replies: 457
- Views: 333915
Re: Final Jitters
I've always been one to take walks as a part of my studying process. I find it can be helpful in relaxing me, especially when I've been studying for hours at a time. There have been plenty of studies which have revealed the mental and physical benefits of even just a twenty minute stroll. Walking in...