Search found 34 matches

by AvaGordon_4F
Sun Dec 09, 2018 11:55 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: tetrahedral or square planar?
Replies: 5
Views: 379

Re: tetrahedral or square planar?

I don't think we are responsible for that distinction, at least for this class! 14B tho...
by AvaGordon_4F
Sun Dec 09, 2018 11:54 pm
Forum: Biological Examples
Topic: Cisplatin
Replies: 4
Views: 263

Re: Cisplatin

Its because of the way the chlorines are oriented! They are able to bind to two relatively close guanines on DNA and bind at TWO sites, which blocks dna replication mechanisms. Transplatin isn't able to complex twice and so the one bond it makes is not enough to block replication
by AvaGordon_4F
Sun Dec 09, 2018 11:52 pm
Forum: Administrative Questions and Class Announcements
Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]
Replies: 135
Views: 28918

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]

Thank you so much for everything!! These worksheets were a life saver
by AvaGordon_4F
Sun Dec 02, 2018 11:32 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate
Replies: 2
Views: 73

Re: Polydentate

Yeah I'm also confused about this...
by AvaGordon_4F
Sun Dec 02, 2018 11:31 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Calculating
Replies: 2
Views: 83

Re: Calculating

I think we'll be covering that next class! My TA said in OH that its a detailed calculation but we'll do it step by step and it's more or less straight forward.
by AvaGordon_4F
Sun Dec 02, 2018 11:30 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 2
Views: 70

Re: Ligands

Im not positive but I think we would have to either have a picture or be told.
by AvaGordon_4F
Sun Dec 02, 2018 11:29 pm
Forum: Biological Examples
Topic: Cisplatin Example
Replies: 5
Views: 178

Re: Cisplatin Example

Yeah, like people are saying, one bond with DNA is not enough to block the DNA replication machinery. If its a trans molecule, there would only be one bond available to be made. In a cis molecule, two bonds are available to be made, and so those two bonds are what is necessary to disrupt DNA replica...
by AvaGordon_4F
Sun Nov 25, 2018 11:05 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Covalent Character
Replies: 1
Views: 71

Re: Covalent Character

So covalent character is between atoms closer together on the table (that are most willing to SHARE their electron), whereas ionic character is between elements further apart (that are more willing to entirely donate their electrons). Between O and S, which are in the same group, but different perio...
by AvaGordon_4F
Sun Nov 25, 2018 11:01 pm
Forum: Hybridization
Topic: pi bonds and rotation
Replies: 3
Views: 77

Re: pi bonds and rotation

Yeah, so pi bonds don't allow any rotation at all. An easy way to visualize this is to think of how sigma bonds are arranged tip to tip, so theres only one area of overlap between them (so they can rotate) but pi bonds are arranged side to side, so there are two areas of overlap between them. If a p...
by AvaGordon_4F
Sun Nov 25, 2018 10:59 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Unhybridized P orbital
Replies: 2
Views: 42

Re: Unhybridized P orbital

Yes, to the best of my understanding, this unhybridized p orbital does contain electrons, they're just not involved in the hybridization bonding. They're the ones that are involved in double and triple bonding!
by AvaGordon_4F
Sun Nov 18, 2018 12:11 am
Forum: General Science Questions
Topic: Exciting Chemistry News!
Replies: 2
Views: 158

Re: Exciting Chemistry News!

So interesting! Thanks
by AvaGordon_4F
Sun Nov 18, 2018 12:10 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 3
Views: 120

Re: Bond Angles

Well I think one of the main things is that one involves only 3 atoms, whereas the other involves 4. So the overall molecular shape will be different because of the 3 bonding pairs vs 4 bonding pairs
by AvaGordon_4F
Fri Nov 16, 2018 3:23 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Tetrahedral shape
Replies: 5
Views: 108

Re: Tetrahedral shape

Distortion in a tetrahedral molecule can also be due to the size of the atoms involved in the bonding interactions. If all of the surrounding atoms are the same element, then the bond angles will all be the same because the bonded atoms will all have the same atomic radius. If they're different, the...
by AvaGordon_4F
Fri Nov 16, 2018 3:11 pm
Forum: Student Social/Study Group
Topic: Study Group
Replies: 1
Views: 96

Re: Study Group

I'd be very interested!
by AvaGordon_4F
Fri Nov 02, 2018 8:15 pm
Forum: DeBroglie Equation
Topic: De Broglie Equation
Replies: 2
Views: 251

Re: De Broglie Equation

De Broglie basically was saying that all objects in our world have a wavelength, but that the more massive the object, the smaller the wavelength. Essentially we can only observe the wavelengths of an object when it's tiny enough (ie an electron or atom). So when we're talking about a baseball and w...
by AvaGordon_4F
Fri Nov 02, 2018 7:47 pm
Forum: Trends in The Periodic Table
Topic: Will we need to calculate the effective nuclear charge for the midterm?
Replies: 1
Views: 67

Re: Will we need to calculate the effective nuclear charge for the midterm?

I went to dr. lavelle's OH to ask him about that a week or so ago and he mentioned that it was more a conceptual thing we need to know, in terms of shielding etc, but tbh for the midterm I'm not sure. Don't want to give u a wrong answer.
by AvaGordon_4F
Fri Nov 02, 2018 7:45 pm
Forum: Photoelectric Effect
Topic: Chem Test 2, #5 b
Replies: 4
Views: 194

Re: Chem Test 2, #5 b

I had a differently worded question but I also think what they're asking for in your case was for you to say that energy levels are quantized in the atom. Meaning that the energy (and therefore frequency) of light that is emitted corresponds to the specific amounts of energy necessary to move an ato...
by AvaGordon_4F
Thu Oct 25, 2018 12:24 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Question about H electron configuration
Replies: 3
Views: 81

Re: Question about H electron configuration

I am also confused about this. When the single electron in an H atom is excited up to, say, 5p, does it just bypass all the intermediate shells and subshells? Does it drop immediately down? Can it exist in that excited state for long? I'm just not sure I'm conceptualizing this properly...
by AvaGordon_4F
Thu Oct 25, 2018 12:19 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Bohr Frequency Condition
Replies: 1
Views: 128

Re: Bohr Frequency Condition

Basically, Bohr frequency says that the frequency of the light emitted from any substance (visualized as a line on an emission spectroscopy) is directly related to the change in energy that it was responsible for enacting (ie a jump from n=2 --> n=1). So: frequency of emitted light = (deltaE)/planck...
by AvaGordon_4F
Thu Oct 25, 2018 12:15 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Everyday objects and Heisenberg's uncertainty
Replies: 3
Views: 733

Re: Everyday objects and Heisenberg's uncertainty

Wasn't the whole thing about Heisenberg Indeterminacy the fact that at such a small level (the atomic level) our tools of measurement for position and momentum are not effective enough to not influence the measurements they take? Because I remember the professor (or maybe my TA) mentioning that its ...
by AvaGordon_4F
Wed Oct 24, 2018 8:58 pm
Forum: Administrative Questions and Class Announcements
Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]
Replies: 135
Views: 28918

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]

I'm a little confused on #7 in the Quantum World Part 1 worksheet. I just can't seem to come up with (1/ni)=0.0278 and I'm not sure why. Could someone explain it to me possibly? I follow her formulas and rationale, I'm just not getting the right numbers...
by AvaGordon_4F
Fri Oct 19, 2018 7:32 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty in the velocity
Replies: 1
Views: 45

Re: Uncertainty in the velocity

I think I remember this... Do you mean the delta V answer we got from the problem we did in class? Because if so, that was a sample problem he did to show us that electrons could not be confined to the diameter of the nucleus. They have to exist outside of it. Because if we set our delta X value to ...
by AvaGordon_4F
Fri Oct 19, 2018 7:25 pm
Forum: Properties of Light
Topic: Wave-Particle Duality [ENDORSED]
Replies: 1
Views: 56

Re: Wave-Particle Duality [ENDORSED]

The photoelectric effect is the experiment that shows that light has particle qualities. They noticed that whether or not an electron was ejected from a metal had to do with the frequency of the light that was shone on it, not the intensity of that light. This showed that light was made of photons b...
by AvaGordon_4F
Fri Oct 19, 2018 7:17 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electrostatic Attraction
Replies: 5
Views: 86

Re: Electrostatic Attraction

From what I understand that's just the attraction between positive and negatively charged things.
by AvaGordon_4F
Wed Oct 10, 2018 12:45 am
Forum: Significant Figures
Topic: Calculators
Replies: 20
Views: 625

Re: Calculators

Honestly not sure... Maybe email your TA? They're probably not going to provide calculators, so if they say you can't use yours that would be awful. Definitely borrow one to be safe.
by AvaGordon_4F
Wed Oct 10, 2018 12:40 am
Forum: Significant Figures
Topic: Calculators
Replies: 20
Views: 625

Re: Calculators

You'll need to buy a scientific calculator for the midterm and final, I believe. On the syllabus it says that "only non-programmable, non-graphing calculators are allowed".
by AvaGordon_4F
Wed Oct 10, 2018 12:33 am
Forum: Balancing Chemical Reactions
Topic: Chemical compounds
Replies: 3
Views: 197

Re: Chemical compounds

I also was wondering this. My TA said that we would not be expected to translate from written word --> formula but several UAs have said otherwise.
by AvaGordon_4F
Wed Oct 10, 2018 12:24 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Periodic Table
Replies: 3
Views: 150

Re: Periodic Table

Hi! So I had the same question and my TA (Anton) said that whenever doing calculations using molar masses, it's best to uses the entire number, including all of the decimals listed. He said it's because depending on what calculations you're doing, it may impact your final answer, and you'll never be...
by AvaGordon_4F
Fri Oct 05, 2018 12:27 pm
Forum: SI Units, Unit Conversions
Topic: How does grading for discussion posts work?
Replies: 80
Views: 2583

Re: How does grading for discussion posts work?

Does anyone know when (if?) the audio-visual focus topics are due? I switched into this class a few days ago and I'm a little confused. Thank you!!
by AvaGordon_4F
Fri Oct 05, 2018 12:12 pm
Forum: Significant Figures
Topic: Zeros in sig figs
Replies: 4
Views: 112

Re: Zeros in sig figs

If you'd like, Dr. Lavelle also put up a great resource that explains how to use Sig Figs. It's super comprehensive and it walks you through all the rules (even the weird ones, like the ones about zeros) kind of painlessly! I'll link it below! There is also another one that is more of a formula shee...
by AvaGordon_4F
Fri Oct 05, 2018 12:05 pm
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 166
Views: 100979

Re: Rusty on High School Chem [ENDORSED]

Not sure if anyone else has mentioned this but I've found that studying in groups is really a great way to get a better grasp on the material. Not only will you feel less alone while you're grappling with the new material, but its also an objective fact that teaching a concept to someone is the best...
by AvaGordon_4F
Fri Oct 05, 2018 11:55 am
Forum: Empirical & Molecular Formulas
Topic: When finding empirical formula
Replies: 4
Views: 135

Re: When finding empirical formula

I believe so, yes! You need to calculate mass percentage composition and get a percentage for every element involved, because that is the crucial information you need to do the rest of the problem. Once you have that, you can proceed with solving the rest (by assuming you have 100 g of the compound,...

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