Search found 32 matches

by Diego Gonzalez 3F
Sat Dec 08, 2018 7:32 pm
Forum: Lewis Structures
Topic: octet
Replies: 1
Views: 36

Re: octet

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 ...
by Diego Gonzalez 3F
Sat Dec 08, 2018 7:28 pm
Forum: Photoelectric Effect
Topic: work function
Replies: 2
Views: 54

Re: work function

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.
by Diego Gonzalez 3F
Fri Dec 07, 2018 9:13 pm
Forum: Naming
Topic: naming
Replies: 5
Views: 84

Re: naming

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...
by Diego Gonzalez 3F
Fri Dec 07, 2018 8:47 pm
Forum: Coordinate Covalent Bonds
Topic: Chelating and heme complex
Replies: 2
Views: 66

Re: Chelating and heme complex

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.
by Diego Gonzalez 3F
Fri Dec 07, 2018 8:45 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Review question
Replies: 1
Views: 41

Re: Review question

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...
by Diego Gonzalez 3F
Fri Dec 07, 2018 8:39 pm
Forum: Bond Lengths & Energies
Topic: Review question
Replies: 2
Views: 61

Re: Review question

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.
by Diego Gonzalez 3F
Fri Dec 07, 2018 8:34 pm
Forum: Naming
Topic: Naming Coordinate Compounds
Replies: 3
Views: 72

Re: Naming Coordinate Compounds

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.
by Diego Gonzalez 3F
Fri Dec 07, 2018 8:28 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate ligands
Replies: 2
Views: 51

Polydentate ligands

How do we tell how many dentates a ligand has? From what I understand everything after bidentate is polydentate right?
by Diego Gonzalez 3F
Sun Dec 02, 2018 10:32 pm
Forum: Dipole Moments
Topic: Strength of intramolecular forces due to polarity
Replies: 5
Views: 102

Re: Strength of intramolecular forces due to polarity

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.
by Diego Gonzalez 3F
Sun Dec 02, 2018 10:26 pm
Forum: Naming
Topic: Transition Metal in naming
Replies: 2
Views: 39

Transition Metal in naming

Is there any particular why the transition metal always go last in the order when naming a compound?
by Diego Gonzalez 3F
Sun Dec 02, 2018 10:24 pm
Forum: Lewis Acids & Bases
Topic: Lewis acid/ bronsted acid
Replies: 1
Views: 34

Lewis acid/ bronsted acid

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?
by Diego Gonzalez 3F
Sun Nov 11, 2018 10:48 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal charge on central atom
Replies: 5
Views: 118

Re: Formal charge on central atom

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.
by Diego Gonzalez 3F
Sun Nov 11, 2018 10:48 pm
Forum: Electronegativity
Topic: Greater Ionic character
Replies: 3
Views: 59

Re: Greater Ionic character

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.
by Diego Gonzalez 3F
Sun Nov 11, 2018 10:46 pm
Forum: Bond Lengths & Energies
Topic: Bond lengths and resonance structure
Replies: 2
Views: 40

Re: Bond lengths and resonance structure

yes, so if one has bonds of 140 pm and the other has length of 120 pm, the average would be 130 pm.
by Diego Gonzalez 3F
Wed Nov 07, 2018 6:04 am
Forum: Octet Exceptions
Topic: Octet Exceptions
Replies: 4
Views: 66

Re: Octet Exceptions

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
by Diego Gonzalez 3F
Thu Nov 01, 2018 6:26 pm
Forum: Lewis Structures
Topic: Lewis Structures (w/ same formal charge but different bonds)
Replies: 2
Views: 52

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

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.
by Diego Gonzalez 3F
Wed Oct 31, 2018 8:03 pm
Forum: Ionic & Covalent Bonds
Topic: Multi-Electron Atom
Replies: 3
Views: 74

Re: Multi-Electron Atom

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.
by Diego Gonzalez 3F
Wed Oct 31, 2018 7:35 pm
Forum: Lewis Structures
Topic: Most stable lewis
Replies: 1
Views: 33

Most stable lewis

How do we know which resonance structure is the most stable? Can you do it by just looking at the lewis structures?
by Diego Gonzalez 3F
Wed Oct 31, 2018 7:35 pm
Forum: Lewis Structures
Topic: Most stable lewis
Replies: 3
Views: 70

Most stable lewis

How do we know which resonance structure is the most stable? Can you do it by just looking at the lewis structures?
by Diego Gonzalez 3F
Sun Oct 28, 2018 2:22 pm
Forum: Properties of Electrons
Topic: Conceptual Test question
Replies: 1
Views: 100

Re: Conceptual Test question

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.
by Diego Gonzalez 3F
Sun Oct 28, 2018 9:32 am
Forum: Lewis Structures
Topic: Lewis Structures in Ionic Bonds
Replies: 2
Views: 35

Re: Lewis Structures in Ionic Bonds

yes, we did an example in class of the ionic compound Potassium Chloride
by Diego Gonzalez 3F
Sat Oct 27, 2018 7:31 pm
Forum: *Shrodinger Equation
Topic: Threshold Energy
Replies: 4
Views: 135

Re: Threshold Energy

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.
by Diego Gonzalez 3F
Sat Oct 27, 2018 7:25 pm
Forum: Student Social/Study Group
Topic: Winter quarter scheduling
Replies: 6
Views: 226

Re: Winter quarter scheduling

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.
by Diego Gonzalez 3F
Fri Oct 19, 2018 8:23 pm
Forum: DeBroglie Equation
Topic: DeBroglie wavelike properties question
Replies: 4
Views: 79

DeBroglie wavelike properties question

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?
by Diego Gonzalez 3F
Fri Oct 19, 2018 7:45 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect
Replies: 1
Views: 36

Re: Photoelectric Effect

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.
by Diego Gonzalez 3F
Tue Oct 16, 2018 10:01 pm
Forum: Properties of Light
Topic: Hmwrk 1.9
Replies: 2
Views: 57

Re: Hmwrk 1.9

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.
by Diego Gonzalez 3F
Sat Oct 13, 2018 11:02 pm
Forum: Properties of Electrons
Topic: photoelectric effect question
Replies: 2
Views: 36

photoelectric effect question

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?
by Diego Gonzalez 3F
Sat Oct 13, 2018 10:42 pm
Forum: Properties of Light
Topic: Wave vs. Photon
Replies: 2
Views: 38

Re: Wave vs. Photon

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.
by Diego Gonzalez 3F
Tue Oct 09, 2018 7:10 pm
Forum: Molarity, Solutions, Dilutions
Topic: Online Module Problem Dilutions
Replies: 2
Views: 227

Re: Online Module Problem Dilutions

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.
by Diego Gonzalez 3F
Thu Oct 04, 2018 3:56 pm
Forum: Empirical & Molecular Formulas
Topic: How to write empirical/ molecular formulas
Replies: 3
Views: 63

Re: How to write empirical/ molecular formulas

the general rule, i believe, is that Carbon always goes first, followed by Hydrogen, and then continued by the elements in alphabetical order.
by Diego Gonzalez 3F
Tue Oct 02, 2018 10:21 pm
Forum: General Science Questions
Topic: Post Module Assessment
Replies: 3
Views: 94

Re: Post Module Assessment

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
by Diego Gonzalez 3F
Fri Sep 28, 2018 1:07 pm
Forum: SI Units, Unit Conversions
Topic: How does grading for discussion posts work?
Replies: 73
Views: 1655

Re: How does grading for discussion posts work?

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.

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