CHEMISTRY COMMUNITY

Diego Gonzalez 3F

elements that are closer to the noble gases periodically speaking are going to want to fulfill the octet rule since theyre already close to a full 8 electrons. Elements like in group 13 only have 5 valence electrons so its more work to get those electrons for their full octet so they dont subscribe ...

Diego Gonzalez 3F

you dont, frequency allows you to find the energy of the proton but you would need to be given velocity or kinetic energy to find the work function.

Diego Gonzalez 3F

For CN (Cyanide) yes you must memorize the charge of -1. There is a list on Professor Lavelles website titled "Naming Coordination Compounds" that has all the ligands you need to memorize along with their charges. If its not on there, its either a transition metal that can have multiple ox...

Diego Gonzalez 3F

A chelating complex is a molecule that is polydentate. Since it bonds in multiple places on the molecule it will form a sort of ring structure. This ring structure is a chelate.

Diego Gonzalez 3F

You need to draw out the lewis structures of each molecule and observe what kind of intermolecular forces each one has. After telling which one each one was you need to recall that some intermolecular forces are stronger than others. the strongest intermolecular force is hydrogen bonds while the wea...

Diego Gonzalez 3F

I believe it is Carbon bonded to the other carbon because out of all those atoms, carbon is the smallest. Since its the smallest, the atoms will be closer together when bonded bc their bonds are slightly shorter.

Diego Gonzalez 3F

honestly, you just need to memorize the names. You only need to remember the common names though, not the new IUPAC ones. So just memorize the center column of the naming coordinate compounds page on lavelles website.

Diego Gonzalez 3F

How do we tell how many dentates a ligand has? From what I understand everything after bidentate is polydentate right?

Diego Gonzalez 3F

a good way to remember that polar molecules form dipole dipole interactions between them is the fact that the word "pole" of polar is in the name dipole.

Diego Gonzalez 3F

Is there any particular why the transition metal always go last in the order when naming a compound?

Diego Gonzalez 3F

Is there any difference between lewis and bronsted acids besides the way they're explained? Bc lewis is the electron acceptor while bronsted is proton donor, so same thing really right?

Diego Gonzalez 3F

the closer to zero the charge is, the more stable the entire compound will be. Since its the central atom its especially important since its bonding with every other atom in the compound.

Diego Gonzalez 3F

Carbon with Sulfur would be more electronegative since the trend of electronegativity is up and to the right, sulfur is below oxygen in its group.

Diego Gonzalez 3F

yes, so if one has bonds of 140 pm and the other has length of 120 pm, the average would be 130 pm.

Diego Gonzalez 3F

everything in period 3 and below may have an expanded octet (bc their energy level allows D subshell to be filled)
Everything in group 13 is satisfied WITHOUT a full octet.

So I just remember period 3 and below expand
Group 13- satisfied with less

Diego Gonzalez 3F

Since a double bond is more stable than a single bond, I believe the same logic applies. So I believe that a triple bond, if the formal charge is lowest it can be, would be preferable.

Diego Gonzalez 3F

a multi electron atom is any atom besides hydrogen. That is the coulomb potential energy which is charge 1 times charge 2 over distance between charges. It measures the force of attraction between 2 points.

Diego Gonzalez 3F

How do we know which resonance structure is the most stable? Can you do it by just looking at the lewis structures?

Diego Gonzalez 3F

How do we know which resonance structure is the most stable? Can you do it by just looking at the lewis structures?

Diego Gonzalez 3F

Shells of an atom have discrete energy levels between shells, this question was discussing the energy it takes to get from one to the other.

Diego Gonzalez 3F

yes, we did an example in class of the ionic compound Potassium Chloride

Diego Gonzalez 3F

Schrodingers equation defines wave functions. Threshold energy has to do with the photoelectric effect as the minimum energy to remove an electron from a metal.

Diego Gonzalez 3F

I talked to my academic counselor and she said most people dont end up taking the class and lab at the same time. It's fine to take the lab at a later quarter.

Diego Gonzalez 3F

So, according to the DeBroglie Equation, whether something has wavelike properties or not is dependent on how small it's wavelength is, correct?
What is the threshold number of wavelength that separates those with wavelike properties to those without?

Diego Gonzalez 3F

If you are given the kinetic energy of the launched electron and the threshold energy of the metal it launched from, then yes you do need to use the kinetic energy to find the energy of the proton because the energy of the proton will be Kinetic Energy + Threshold energy.

Diego Gonzalez 3F

I can confirm that the wavelength is 1 meter, I found this by plugging in the C constant and the frequency given (which happened to be the same # as the c constant) into the equation C= Lambda x V. So after dividing C by the frequency V I got the wavelength as 1 meter.

Diego Gonzalez 3F

I understand that the energy of a photon minus the threshold energy to remove the electron from a metal surface is kinetic energy or Ek=1/2 M-V^2 but what does the kinetic energy equation mean? Why is there a 1/2 and what does the M stand for? why is the frequency squared?

Diego Gonzalez 3F

A photon is a packet carrying light energy. These photons travel in waves. Intensity of light can be thought of as the amount of photons.

Diego Gonzalez 3F

first, convert the 5.00 grams of KMnO4 to mols. You should get .03164 moles. Then find the molarity by dividing this number by .15 liters, getting .211 M. Then set up a M1V1=M2V2 with M1 being .211, V1 being .02L, and V2 being .25L. Solve for M2 and thats your answer.

Diego Gonzalez 3F

the general rule, i believe, is that Carbon always goes first, followed by Hydrogen, and then continued by the elements in alphabetical order.

Diego Gonzalez 3F

No, dont put a 10 in front of that, the equation is already balanced. Try converting kg to grams and then converting this to moles (using atomic # from periodic table) then compare stoichiometric coefficients to find the ratio from your reactant to product

Diego Gonzalez 3F

I believe you need to post in one way or another 3 times per week to receive full credit for that week. Each post/comment is worth 1 point.

CHEMISTRY COMMUNITY

Search found 32 matches

Re: octet

Re: work function

Re: naming

Re: Chelating and heme complex

Re: Review question

Re: Review question

Re: Naming Coordinate Compounds

Polydentate ligands

Re: Strength of intramolecular forces due to polarity

Transition Metal in naming

Lewis acid/ bronsted acid

Re: Formal charge on central atom

Re: Greater Ionic character

Re: Bond lengths and resonance structure

Re: Octet Exceptions

Re: Lewis Structures (w/ same formal charge but different bonds)

Re: Multi-Electron Atom

Most stable lewis

Most stable lewis

Re: Conceptual Test question

Re: Lewis Structures in Ionic Bonds

Re: Threshold Energy

Re: Winter quarter scheduling

DeBroglie wavelike properties question

Re: Photoelectric Effect

Re: Hmwrk 1.9

photoelectric effect question

Re: Wave vs. Photon

Re: Online Module Problem Dilutions

Re: How to write empirical/ molecular formulas

Re: Post Module Assessment

Re: How does grading for discussion posts work?