CHEMISTRY COMMUNITY

Daniel_Callos_4I

Which acids and bases should we have memorized for the final?

Daniel_Callos_4I

Does anyone have the acid/base list from the course reader? If so I would appreciate if you could post it.

Daniel_Callos_4I

MO theory is also useful for predicting which atom could be most prone to bonding based on the higher contribution to the LUMO, as well as reactivity based on lone pairs in the molecular orbitals.

Daniel_Callos_4I

Does anyone happen to have the graphic that Dr. Lavelle showed in class with the names of ligands used in coordination compounds? I would greatly appreciate it.
Thanks!

Daniel_Callos_4I

Éléments with empty d orbitals can fill their d orbitals for the purposes of bonding, thus resulting in an expanded octet of 10 or even 12 electrons.

Daniel_Callos_4I

Why is it favorable to have a formal charge of 0, and why do compounds with a lower overall formal charge contribute more to the resonance of a molecule?

Daniel_Callos_4I

How does this work? For instance,

does 8.27*10^7 - 8.27*10^6 equal 7.44*10^7 or 7.4*10^7
it is about the number of decimal places, or the actual place value?

Thanks,
D. Callos

Daniel_Callos_4I

What is a wavefunction and why is it used to model electrons?

Daniel_Callos_4I

The Rydberg equation is a mathematical extension of the Bohr Frequency Condition which allows us to calculate the frequency of photons emitted as photoexcited electrons fall back to their original energy level. In a former post, I gave an informal proof for the Rydberg equation based on the basic st...

Daniel_Callos_4I

I read on the topic and asked Dr. Lavelle during office hours, and I think this is how it goes. As mentioned above and in the course reader, black bodies are different from atoms and molecules in that atoms and molecules have characteristic absorption and emission spectra; however, black bodies can ...

Daniel_Callos_4I

Hey,
The electron volt is the amount of work (force over a distance) necessary to move an electron across an electrical pressure difference of one volt.

Hope this helps and happy chemistry!

-Dan Callos

Daniel_Callos_4I

Yes, you are correct. Just remember that neither of these models give us perfect insight into the nature of light and it is hard to form a unified picture; after all, our intuition as humans was developed with macroscopic objects, not unobservable light.

Daniel_Callos_4I

Convention states that for covalent compounds, C is written first, then H, then all remaining elements in alphabetical order. So for your case I believe CHO would be the correct order. Hope this helps and happy chemistry!

-D. Callos

Daniel_Callos_4I

In order to understand the Bohr frequency condition both conceptually and mathematically, it is necessary to establish a working knowledge of the theory that preceded it. A researcher by the name of Ernest Rutherford had previously performed a gold foil experiment, showing that, when helium atoms we...

Daniel_Callos_4I

I can't give an official answer on this topic, but from what I've heard mentioned in class by Dr. Lavelle it seems as if these constants will be provided to us as needed for assessments.

Daniel_Callos_4I

Generally there is a fairly formulaic way to go about balancing chemical equations for the combustion of hydrocarbons. First, let us examine the unbalanced equation: C4H10(g) + O2(g) ---> CO2(g) + H2O(g) Let us start with carbon, as there are 4 carbons on the left side but only one on the right. We ...

CHEMISTRY COMMUNITY

Search found 16 matches

Memorization of Acids and Bases

Acid/Base List from Course Reader

Re: What is MO theory for? [ENDORSED]

Nomenclature

Re: Expanded Octets

Formal Charge of 0 [ENDORSED]

Addition and subtraction of significant figures with scientific notation?

Wave function [ENDORSED]

Re: Atomic Spectrum

Re: Black Body Radiation

Re: What is the eV unit? [ENDORSED]

Re: Different ways of looking at light

Re: Order of writing ions in a molecule? [ENDORSED]

Re: Bohr Frequency Condition

Re: Memorizing Constants

Re: Balancing Chemistry Equations Pre-module Assessment Question #6