Search found 22 matches

by Martha Xuncax 3G
Sun Mar 19, 2017 1:32 pm
Forum: General Science Questions
Topic: Final
Replies: 9
Views: 1302

Re: Final

yeah he said there would be a questions that keeps popping up on chemistry community!
by Martha Xuncax 3G
Thu Mar 09, 2017 11:35 pm
Forum: Administrative Questions and Class Announcements
Topic: Final content
Replies: 4
Views: 497

Final content

Does anyone know if there will be any proofs on the final?
by Martha Xuncax 3G
Sun Mar 05, 2017 9:37 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 15263

Re: Quiz 3 Winter 2017

^Yes, I thought that too. Can someone explain this?
by Martha Xuncax 3G
Sun Feb 26, 2017 4:12 pm
Forum: *Electrophiles
Topic: nucleophile and electrophile
Replies: 3
Views: 529

Re: nucleophile and electrophile

does it also have to do with their electronegativity?
by Martha Xuncax 3G
Sun Feb 19, 2017 9:23 pm
Forum: First Order Reactions
Topic: First vs. Second Order
Replies: 7
Views: 787

Re: First vs. Second Order

The course reader mentions that the probability of 3 molecules colliding simultaneously is unlikely, so termolecular reactions are less common (to the person asking how many reactions there were).
by Martha Xuncax 3G
Sun Feb 05, 2017 11:18 pm
Forum: Administrative Questions and Class Announcements
Topic: Tutoring? [ENDORSED]
Replies: 39
Views: 20908

Re: Tutoring? [ENDORSED]

I would say so. Often, they already have topics that they think we should cover, but they're always open for suggestions.
by Martha Xuncax 3G
Sun Jan 29, 2017 6:44 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 13266

Re: Quiz 1 Preparation Answers

The same formulas from the back of your periodic table I believe.
by Martha Xuncax 3G
Sat Jan 21, 2017 8:01 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: -q(Rxn)=q(cal)? [ENDORSED]
Replies: 3
Views: 404

Re: -q(Rxn)=q(cal)? [ENDORSED]

For example, if you had a problem on combustion, your equation would be -q(system)=+q(surroundings). This is because combustion is exothermic, so while the system is losing energy. its surroundings are gaining it.
by Martha Xuncax 3G
Fri Jan 13, 2017 2:08 pm
Forum: Phase Changes & Related Calculations
Topic: Most Helpful Resource
Replies: 14
Views: 1220

Re: Most Helpful Resource

If you can you should also join AAP. They meet twice a week for an hour and a half, and the peer facilitators have taken the class so they know what's to be expected. Plus, they go along with Lavelle's lessons, so it's really helpful!
by Martha Xuncax 3G
Fri Dec 02, 2016 8:37 pm
Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
Topic: When to use the Henderson-Hasselbalch Equation
Replies: 4
Views: 949

Re: When to use the Henderson-Hasselbalch Equation

So we will have the option of using the Henderson-Hasselbalch equation or the ice box on the final?
by Martha Xuncax 3G
Wed Nov 23, 2016 4:16 pm
Forum: Polyprotic Acids & Bases
Topic: Finding the K Overall [ENDORSED]
Replies: 3
Views: 1289

Finding the K Overall [ENDORSED]

The course reader had an example where it multiplied Ka1 and Ka2 in order to get the overall K, but I don't understand the math. For instance, how does multiplying [HCO3-] by [CO3^2-] result in [CO3^2-]?
by Martha Xuncax 3G
Fri Nov 18, 2016 5:19 pm
Forum: Lewis Acids & Bases
Topic: Homework 12.109- hydronium and hydroxide ions
Replies: 2
Views: 378

Homework 12.109- hydronium and hydroxide ions

"Hydronium and hydroxide ions appear to move through water much faster than other kinds of ions. Explain this observation."
I didn't really understand the book's answer, can someone explain this?
by Martha Xuncax 3G
Fri Nov 11, 2016 4:50 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 81
Views: 27073

Re: Reading the textbook [ENDORSED]

I personally find it easier to go through the course reader again to fully understand the key concepts, then start the homework, and if I come across concepts that i don't understand, then I go through the textbook to understand the smaller details.
by Martha Xuncax 3G
Fri Nov 04, 2016 5:12 pm
Forum: Naming
Topic: the difference between bi- and di- prefixes?
Replies: 2
Views: 7508

Re: the difference between bi- and di- prefixes?

I think it was mentioned in lecture today that if a ligand already has a name with di, then you use bi for the second ligand.
by Martha Xuncax 3G
Thu Oct 27, 2016 11:39 am
Forum: Ionic & Covalent Bonds
Topic: Difference in Electronegativity [ENDORSED]
Replies: 3
Views: 601

Re: Difference in Electronegativity [ENDORSED]

Yes Josue, the greater the difference in electronegativity, the greater the charge difference, and thus the greater ionic character of the covalent bond
by Martha Xuncax 3G
Fri Oct 21, 2016 11:24 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Highest precision in velocity
Replies: 2
Views: 341

Highest precision in velocity

I was recently doing a problem that gave us the radius of 2 atoms and asked which atom could give us the highest precision of the velocity of the electron. The answer was the atom that had the greater radius, but I didn't really understand why. Does anyone know how to solve this?
by Martha Xuncax 3G
Fri Oct 14, 2016 9:37 am
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 113
Views: 36302

Re: Rusty on High School Chem [ENDORSED]

You can get more info here http://www.aap.ucla.edu/about-aap/becom ... ap-member/
I'll try to talk to a AAP to see if that can be organized!
by Martha Xuncax 3G
Fri Oct 07, 2016 4:47 pm
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 113
Views: 36302

Re: Rusty on High School Chem [ENDORSED]

I don't think anyone's mentioned this, but in addition to all of Lavelle's resources, being a part of AAP is extremely beneficial. I joined last week and the 1.5 hr sessions twice a week are really helpful. The Peer Facilitators take their time to explain the subjects thoroughly, and learning from y...
by Martha Xuncax 3G
Fri Oct 07, 2016 4:38 pm
Forum: Student Social/Study Group
Topic: Rieber Vista Study Group!
Replies: 8
Views: 820

Re: Rieber Vista Study Group!

If you guys are still doing this, I'd like to be part of it as well!
by Martha Xuncax 3G
Fri Sep 30, 2016 4:51 pm
Forum: Quantum Numbers and The H-Atom
Topic: Atomic Spectra and Energy Levels
Replies: 1
Views: 269

Atomic Spectra and Energy Levels

We were shown a model of the different energies that electrons can have (with the Lyman and Balmer series) in lecture today, but I was confused on whether the arrows go up or down when energy is being absorbed.

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