Search found 23 matches

by Lianna Kishi 1A
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: 867

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...
by Lianna Kishi 1A
Thu Dec 07, 2017 8:22 pm
Forum: Ideal Gases
Topic: Kp to Kc
Replies: 1
Views: 239

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
by Lianna Kishi 1A
Thu Dec 07, 2017 8:15 pm
Forum: Ideal Gases
Topic: Kp to Kc
Replies: 1
Views: 239

Kp to Kc

How do you convert to Kc if you know Kp?
by Lianna Kishi 1A
Sun Dec 03, 2017 8:42 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: K values
Replies: 2
Views: 192

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?
by Lianna Kishi 1A
Sun Dec 03, 2017 8:39 pm
Forum: Amphoteric Compounds
Topic: Amphoteric vs amphiprotic
Replies: 3
Views: 239

Amphoteric vs amphiprotic

what's the difference between an amphoteric compound and an amphiprotic compound?
by Lianna Kishi 1A
Mon Nov 27, 2017 9:50 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Assuming x is negligible
Replies: 3
Views: 206

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.
by Lianna Kishi 1A
Mon Nov 27, 2017 9:45 pm
Forum: Naming
Topic: Neutral ligands
Replies: 1
Views: 108

Neutral ligands

are there any neutral ligand names we should memorize besides aqua, ammine, carbonyl, and nitrosyl?
by Lianna Kishi 1A
Sat Nov 18, 2017 9:50 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Delocalized Pi Bond
Replies: 2
Views: 148

Delocalized Pi Bond

What does it mean for a pi bond to be delocalized?
by Lianna Kishi 1A
Sat Nov 18, 2017 9:42 pm
Forum: Hybridization
Topic: 4.91 Benzyne
Replies: 2
Views: 189

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...
by Lianna Kishi 1A
Wed Nov 08, 2017 6:33 pm
Forum: Ionic & Covalent Bonds
Topic: Valence of an Atom [ENDORSED]
Replies: 3
Views: 206

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?
by Lianna Kishi 1A
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: 161

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!
by Lianna Kishi 1A
Fri Nov 03, 2017 2:20 pm
Forum: Octet Exceptions
Topic: Explaining Octet Rule Exceptions
Replies: 2
Views: 278

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!
by Lianna Kishi 1A
Thu Nov 02, 2017 5:40 pm
Forum: Lewis Structures
Topic: Valence Electrons for transition metals
Replies: 1
Views: 109

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!
by Lianna Kishi 1A
Fri Oct 27, 2017 10:11 pm
Forum: *Shrodinger Equation
Topic: Shrodinger Equation Applications [ENDORSED]
Replies: 7
Views: 387

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.
by Lianna Kishi 1A
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: 226

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.
by Lianna Kishi 1A
Fri Oct 27, 2017 10:05 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Formal Charge [ENDORSED]
Replies: 1
Views: 190

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.
by Lianna Kishi 1A
Fri Oct 27, 2017 10:03 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Stable Lewis Structures
Replies: 1
Views: 156

Re: Stable Lewis Structures

Yes both are correct Lewis Structures but the more stable one is the more accurate model.
by Lianna Kishi 1A
Sat Oct 21, 2017 7:09 pm
Forum: DeBroglie Equation
Topic: Should velocity always be in m.s. when solving? [ENDORSED]
Replies: 11
Views: 824

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.
by Lianna Kishi 1A
Mon Oct 16, 2017 5:34 pm
Forum: Photoelectric Effect
Topic: Post Module #25
Replies: 2
Views: 144

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...
by Lianna Kishi 1A
Fri Oct 13, 2017 11:55 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: H-Atom Equation
Replies: 3
Views: 185

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.
by Lianna Kishi 1A
Fri Oct 13, 2017 11:49 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Question about Atomic Spectroscopy
Replies: 4
Views: 271

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!
by Lianna Kishi 1A
Fri Oct 06, 2017 6:45 pm
Forum: SI Units, Unit Conversions
Topic: Do we need to memorize unit conversions? [ENDORSED]
Replies: 9
Views: 1504

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!
by Lianna Kishi 1A
Fri Oct 06, 2017 6:17 pm
Forum: Balancing Chemical Reactions
Topic: Diatomic Molecules
Replies: 3
Views: 385

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.

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