Search found 23 matches
- Sat Dec 09, 2017 3:48 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Atomic Spectroscopy vs. Molecular Spectroscopy [ENDORSED]
- Replies: 1
- Views: 1340
Atomic Spectroscopy vs. Molecular Spectroscopy [ENDORSED]
In the lecture outline for The Quantum World, it says that we should "With respect to electron transitions that give rise to a UV or visible spectrum: understand the difference between electronic transitions in atomic orbitals (atomic spectroscopy) and electronic transitions in molecular orbita...
- Thu Dec 07, 2017 8:22 pm
- Forum: Ideal Gases
- Topic: Kp to Kc
- Replies: 1
- Views: 434
Re: Kp to Kc
Oops nevermind. If anyone else was wondering you would use the formula PV=nRT and rearrange it such that P=(concentration)RT
- Thu Dec 07, 2017 8:15 pm
- Forum: Ideal Gases
- Topic: Kp to Kc
- Replies: 1
- Views: 434
Kp to Kc
How do you convert to Kc if you know Kp?
- Sun Dec 03, 2017 8:42 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: K values
- Replies: 2
- Views: 424
K values
How does the K value of an equation relate to the strength of an acid? Like for strong acids should the K value be high or low?
- Sun Dec 03, 2017 8:39 pm
- Forum: Amphoteric Compounds
- Topic: Amphoteric vs amphiprotic
- Replies: 3
- Views: 512
Amphoteric vs amphiprotic
what's the difference between an amphoteric compound and an amphiprotic compound?
- Mon Nov 27, 2017 9:50 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Assuming x is negligible
- Replies: 3
- Views: 505
Re: Assuming x is negligible
I was wondering this too but I know for homework problem 11.51 x is negligible for the reactants because their equilibrium concentration (when calculated with proper sigfigs) rounds off to be the same as their initial concentration.
- Mon Nov 27, 2017 9:45 pm
- Forum: Naming
- Topic: Neutral ligands
- Replies: 1
- Views: 275
Neutral ligands
are there any neutral ligand names we should memorize besides aqua, ammine, carbonyl, and nitrosyl?
- Sat Nov 18, 2017 9:50 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Delocalized Pi Bond
- Replies: 2
- Views: 370
Delocalized Pi Bond
What does it mean for a pi bond to be delocalized?
- Sat Nov 18, 2017 9:42 pm
- Forum: Hybridization
- Topic: 4.91 Benzyne
- Replies: 2
- Views: 495
Re: 4.91 Benzyne
The carbons that are triple bonded to each other are sp hybridized. While their hybridization would normally like to adopt a linear arrangement with 180 degree angles, the angles are closer to 120 because they're in the ring. Because of this, benzyne has a very strained structure and is highly react...
- Wed Nov 08, 2017 6:33 pm
- Forum: Ionic & Covalent Bonds
- Topic: Valence of an Atom [ENDORSED]
- Replies: 3
- Views: 574
Valence of an Atom [ENDORSED]
One of the powerpoints from class said that the valence of an atom= the number of covalent bonds. Can someone explain when we would need to know this and how to apply it?
- Wed Nov 08, 2017 3:56 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Principal Energy Level Change Sig Figs
- Replies: 2
- Views: 511
Re: Principal Energy Level Change Sig Figs
I was wondering the same thing, but on past tests I just made sure to put around 3 or 4 numbers after the decimal and I didn't get marked off. Hope this helps!
- Fri Nov 03, 2017 2:20 pm
- Forum: Octet Exceptions
- Topic: Explaining Octet Rule Exceptions
- Replies: 2
- Views: 698
Explaining Octet Rule Exceptions
I know that you can have more than an octet if that particular element is in period 3 or greater and less than an octet for Boron and beryllium but can someone please explain why? Thanks!
- Thu Nov 02, 2017 5:40 pm
- Forum: Lewis Structures
- Topic: Valence Electrons for transition metals
- Replies: 1
- Views: 438
Valence Electrons for transition metals
I'm kind of confused on how to determine how many valence electrons transition metals have. For example, would Manganese have 2 valence electrons or 7? If someone could explain this it would help a lot! Thanks!
- Fri Oct 27, 2017 10:11 pm
- Forum: *Shrodinger Equation
- Topic: Shrodinger Equation Applications [ENDORSED]
- Replies: 7
- Views: 808
Re: Shrodinger Equation Applications [ENDORSED]
No we do not need to know how to derive it. Yes that's all we use it for in this class.
- Fri Oct 27, 2017 10:08 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Building Up (Aufbaw) first row transition metals [ENDORSED]
- Replies: 2
- Views: 540
Re: Building Up (Aufbaw) first row transition metals [ENDORSED]
Yes when drawing the Aufbau diagrams you follow the same order as the electron configuration. So the 4s would be higher than the 3d.
- Fri Oct 27, 2017 10:05 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Formal Charge [ENDORSED]
- Replies: 1
- Views: 346
Re: Formal Charge [ENDORSED]
Formal charge refers to each atom specifically but when you add up all the formal charges of the atoms in the molecule you get the overall charge of the molecule.
- Fri Oct 27, 2017 10:03 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Stable Lewis Structures
- Replies: 1
- Views: 277
Re: Stable Lewis Structures
Yes both are correct Lewis Structures but the more stable one is the more accurate model.
- Sat Oct 21, 2017 7:09 pm
- Forum: DeBroglie Equation
- Topic: Should velocity always be in m.s. when solving? [ENDORSED]
- Replies: 11
- Views: 2020
Re: Should velocity always be in m.s. when solving? [ENDORSED]
To be safe I would put velocity in m/s. However, my TA did an example in discussion where he left velocity in km/s and mass in g and the answer still turned out correct because the units correctly canceled with one another.
- Mon Oct 16, 2017 5:34 pm
- Forum: Photoelectric Effect
- Topic: Post Module #25
- Replies: 2
- Views: 328
Post Module #25
Can someone help me with this question and explain the answer? I thought the answer would be C but it's wrong. 25. Photoelectric experiments gave rise to a new equation relating the energy of light to its frequency. Select the right equation. a) \lambda \nu =c b) E_{k}= mv^{2}/2 c) mv^{2}/2= hv-\var...
- Fri Oct 13, 2017 11:55 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: H-Atom Equation
- Replies: 3
- Views: 481
Re: H-Atom Equation
For your second question: Yes you would still use the negative sign in the equation but when you calculate
the energy would turn out positive.
the energy would turn out positive.
- Fri Oct 13, 2017 11:49 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Question about Atomic Spectroscopy
- Replies: 4
- Views: 592
Question about Atomic Spectroscopy
Why does each element have a different atomic spectroscopy? I think it was said in the lecture today but I didn't quite get it down. Thanks!
- Fri Oct 06, 2017 6:45 pm
- Forum: SI Units, Unit Conversions
- Topic: Do we need to memorize unit conversions? [ENDORSED]
- Replies: 9
- Views: 4780
Re: Do we need to memorize unit conversions? [ENDORSED]
Is there any easy way to remember metric prefixes? For example, a mnemonic that would help me remember what each one corresponds to or the order of them? Thanks!
- Fri Oct 06, 2017 6:17 pm
- Forum: Balancing Chemical Reactions
- Topic: Diatomic Molecules
- Replies: 3
- Views: 2600
Re: Diatomic Molecules
Another mnemonic that people use to memorize which elements are diatomic molecules is HOFBrINCl for hydrogen, oxygen, fluorine, bromine, iodine, nitrogen, and chlorine. It seems random but if you say it out loud it's easy to remember that way.