Search found 17 matches
- Sun May 27, 2018 12:06 pm
- Forum: Electronegativity
- Topic: Calculating electronegativity
- Replies: 10
- Views: 1250
Re: Calculating electronegativity
pretty sure we should just be going off of the periodic table trends if they aren't one of the FONCI atoms
- Sun May 27, 2018 12:05 pm
- Forum: Resonance Structures
- Topic: Kekulé Structures??
- Replies: 6
- Views: 835
Re: Kekulé Structures??
Alexander Hari 1L wrote:No, it might be nice to know Kekulé structures, however, for the exams they would want us to write out the entire Lewis Structure
i think the most important thing to know about kekule structures is how to draw resonant structures for molecules that form rings
- Sun May 27, 2018 12:04 pm
- Forum: Resonance Structures
- Topic: ranking
- Replies: 11
- Views: 1472
Re: ranking
you calculate the formal charge of all the atoms, since the most stable structure will see that all atoms have formal charges close to zero
- Sun May 27, 2018 12:01 pm
- Forum: Balancing Redox Reactions
- Topic: Basic and Acidic conditions [ENDORSED]
- Replies: 11
- Views: 6925
Re: Basic and Acidic conditions [ENDORSED]
Jordanmarshall wrote:why is h+ and h3o+ used to balance the acidic h ?
Because pH is determined by the amount of H+ ions and H+ and H3O+ all provide those ions
- Wed May 09, 2018 5:35 pm
- Forum: Ionic & Covalent Bonds
- Topic: Midterm Topics [ENDORSED]
- Replies: 33
- Views: 4709
Re: Midterm Topics [ENDORSED]
yazminedesan1F wrote:Megan Potter 1G wrote:How far in the periodic table do we need to know for electron configuration stuff? To krypton (so 3d, 4s, 4p)?
Im assuming its only up to the d orbital, not the f orbital.
we had f orbital examples in discussion, so i assume you will have to know.
- Wed May 09, 2018 5:35 pm
- Forum: Ionic & Covalent Bonds
- Topic: Midterm Topics [ENDORSED]
- Replies: 33
- Views: 4709
Re: Midterm [ENDORSED]
Maldonado3K wrote:Hello there, I am overthinking everything.. but just to confirm.. our midterm is taking place in CS50 correct? Thanks!
depends on your last name; check the email he sent out
- Sun Apr 29, 2018 10:44 pm
- Forum: DeBroglie Equation
- Topic: does everything have a wavelength
- Replies: 10
- Views: 1443
Re: does everything have a wavelength
According to DeBroglie: yes everything has a wavelength, but some of them have wavelengths so insubstantial/large that it's difficult to observe wavelike properties from them
- Sun Apr 29, 2018 10:43 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Balmer and Lyman Series
- Replies: 9
- Views: 1459
Re: Balmer and Lyman Series
Pretty sure all we have to know regarding the Balmer/Lyman series in general (not just for test 2) is that they correspond to the visible light spectrum/ultraviolet spectrum and the numbering for atomic spectra (n=2 vs n=2 )
- Sun Apr 29, 2018 10:38 pm
- Forum: Photoelectric Effect
- Topic: Work function [ENDORSED]
- Replies: 6
- Views: 799
Re: Work function [ENDORSED]
Work function is the minimum energy required to remove an electron from the surface of a metal which is why you can find the energy of the photon released by subtracting the work function from the kinetic energy of the electron that shot off of the metal
- Sun Apr 29, 2018 10:31 pm
- Forum: Einstein Equation
- Topic: converting from keV to joules
- Replies: 7
- Views: 832
Re: converting from keV to joules
I get confused because the list of equations he provides us tells us nano/centi/kilo but doesn't tell us about the other units we have to memorize but the equation sheet also tells you what one eV is equal to so you can just deduce from there
- Sun Apr 15, 2018 11:49 pm
- Forum: Balancing Chemical Reactions
- Topic: Chemistry Background [ENDORSED]
- Replies: 4
- Views: 555
Re: Chemistry Background [ENDORSED]
It's definitely crucial, because without knowledge of how to balance equations/find molar masses it would be very difficult to grasp other topics in the future. Being able to perform the fundamental calculations will definitely benefit you in future problem-solving, especially when we get to lab por...
- Sun Apr 15, 2018 11:48 pm
- Forum: Balancing Chemical Reactions
- Topic: Trick to balance?
- Replies: 5
- Views: 763
Re: Trick to balance?
A trick that has generally worked for me was to find a "unique" element that perhaps is only present in one product and one reactant and to balance that first, and then balance more "common" elements such as oxygen, hydrogen, etc. around that element!
- Sun Apr 15, 2018 11:46 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Practice Problem [ENDORSED]
- Replies: 2
- Views: 475
Re: Practice Problem [ENDORSED]
You would need to find molar mass because it's basically asking you how much solid KOH to add to the solution. You should first find the number of moles needed to make the molarity of the solution (M = # moles/volume, therefore #moles= M*volume--remembering to convert mL to L). Then you should multi...
- Sun Apr 15, 2018 11:37 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2988813
Re: Post All Chemistry Jokes Here
What's a chemist's dream car?
A Mercedes Benz-ene!
A Mercedes Benz-ene!
- Sun Apr 15, 2018 11:36 pm
- Forum: Administrative Questions and Class Announcements
- Topic: How to find my posts
- Replies: 163
- Views: 161007
Re: How to find my posts
Is there anyway to receive notifications if Prof Lavelle posted?
- Sun Apr 15, 2018 11:33 pm
- Forum: General Science Questions
- Topic: Rusty on High School Chem [ENDORSED]
- Replies: 347
- Views: 416170
Re: Rusty on High School Chem [ENDORSED]
The TAs also often hold weekly meetings with review sheets that go over material! I know for a fact there are review sessions held every Sunday at Hedrick 125 :)
- Sun Apr 15, 2018 11:30 pm
- Forum: Student Social/Study Group
- Topic: Study Group
- Replies: 8
- Views: 992
Re: Study Group
Is there already a groupme formed? If there are enough people interested in making a groupme I'm totally down to organize study sessions.