CHEMISTRY COMMUNITY

Lianna Kishi 1A

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...

Lianna Kishi 1A

Oops nevermind. If anyone else was wondering you would use the formula PV=nRT and rearrange it such that P=(concentration)RT

Lianna Kishi 1A

How do you convert to Kc if you know Kp?

Lianna Kishi 1A

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?

Lianna Kishi 1A

what's the difference between an amphoteric compound and an amphiprotic compound?

Lianna Kishi 1A

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.

Lianna Kishi 1A

are there any neutral ligand names we should memorize besides aqua, ammine, carbonyl, and nitrosyl?

Lianna Kishi 1A

What does it mean for a pi bond to be delocalized?

Lianna Kishi 1A

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...

Lianna Kishi 1A

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?

Lianna Kishi 1A

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!

Lianna Kishi 1A

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!

Lianna Kishi 1A

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!

Lianna Kishi 1A

No we do not need to know how to derive it. Yes that's all we use it for in this class.

Lianna Kishi 1A

Yes when drawing the Aufbau diagrams you follow the same order as the electron configuration. So the 4s would be higher than the 3d.

Lianna Kishi 1A

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.

Lianna Kishi 1A

Yes both are correct Lewis Structures but the more stable one is the more accurate model.

Lianna Kishi 1A

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.

Lianna Kishi 1A

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...

Lianna Kishi 1A

For your second question: Yes you would still use the negative sign in the equation but when you calculate $\Delta E$
the energy would turn out positive.

Lianna Kishi 1A

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!

Lianna Kishi 1A

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!

Lianna Kishi 1A

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.

CHEMISTRY COMMUNITY

Search found 23 matches

Atomic Spectroscopy vs. Molecular Spectroscopy [ENDORSED]

Re: Kp to Kc

Kp to Kc

K values

Amphoteric vs amphiprotic

Re: Assuming x is negligible

Neutral ligands

Delocalized Pi Bond

Re: 4.91 Benzyne

Valence of an Atom [ENDORSED]

Re: Principal Energy Level Change Sig Figs

Explaining Octet Rule Exceptions

Valence Electrons for transition metals

Re: Shrodinger Equation Applications [ENDORSED]

Re: Building Up (Aufbaw) first row transition metals [ENDORSED]

Re: Formal Charge [ENDORSED]

Re: Stable Lewis Structures

Re: Should velocity always be in m.s. when solving? [ENDORSED]

Post Module #25

Re: H-Atom Equation

Question about Atomic Spectroscopy

Re: Do we need to memorize unit conversions? [ENDORSED]

Re: Diatomic Molecules