Search found 33 matches

by Jose Robles 1D
Sun Nov 10, 2019 11:46 pm
Forum: Resonance Structures
Topic: Writing Out Resonance
Replies: 3
Views: 14

Writing Out Resonance

When, say on a test, you need to express resonance, does one need to write out every possible structure? Or can we simply abbreviate it with a bracket and its charge?
by Jose Robles 1D
Sun Nov 10, 2019 11:42 pm
Forum: General Science Questions
Topic: Test 2
Replies: 20
Views: 93

Re: Test 2

Is test 2 cumulative? Or on post-midterm material only?
by Jose Robles 1D
Sun Nov 10, 2019 11:40 pm
Forum: General Science Questions
Topic: London
Replies: 4
Views: 19

Re: London

He usually refers to it as induced dipole- induced dipole.
by Jose Robles 1D
Sun Nov 10, 2019 11:36 pm
Forum: Student Social/Study Group
Topic: Chemistry News
Replies: 57
Views: 37066

Re: Chemistry News

https://www.sciencedaily.com/releases/2 ... 130450.htm

Interesting article that I thought you should look at.
by Jose Robles 1D
Sun Nov 10, 2019 11:21 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 61
Views: 18433

Re: Final Jitters

I wish to study the midterm for the final, does anyone know if we get it back? Or do we need to meet with our tutor to see it temporarily?
by Jose Robles 1D
Wed Nov 06, 2019 3:19 pm
Forum: Lewis Structures
Topic: Expanded Octet
Replies: 10
Views: 44

Expanded Octet

Why and how are some elements allowed to overlook the octet rule?
by Jose Robles 1D
Sun Nov 03, 2019 10:49 pm
Forum: Trends in The Periodic Table
Topic: Electron affinity vs electronegativity
Replies: 7
Views: 31

Re: Electron affinity vs electronegativity

I don't think you'll need to memorize this as much versus other material in the book. This is more of a concept to understand and can be done by looking up one of many periodic tables that define trends online. Just memorize the trends across the periodic table in case a problem is given of it.
by Jose Robles 1D
Sun Nov 03, 2019 10:44 pm
Forum: General Science Questions
Topic: Step Up Sessions
Replies: 3
Views: 17

Step Up Sessions

If I have a firm grasp on a concept, is it worth going to a step up session?
by Jose Robles 1D
Sun Nov 03, 2019 10:41 pm
Forum: General Science Questions
Topic: Study Tips
Replies: 13
Views: 80

Re: Study Tips

I know that one of the questions from the homework will be a test question, but can someone point me to a section of questions that have test-like qualifications? I want get some more practice, so like a recommendation to a challenging problem in the book would be appreciated.
by Jose Robles 1D
Sun Nov 03, 2019 10:36 pm
Forum: General Science Questions
Topic: Finding Formulas from Chemical Name
Replies: 4
Views: 29

Re: Finding Formulas from Chemical Name

I feel that by now one should know the basic molecule formulas and have the ability to write out the compound if for example it says "tri, di, etc." For ionic compounds, I'm not sure, but it never hurts to practice it (Still, I'm sure he'll give us the formulas in the end).
by Jose Robles 1D
Sun Nov 03, 2019 10:32 pm
Forum: General Science Questions
Topic: Study Tactics
Replies: 5
Views: 40

Study Tactics

I'm getting a bit worried for the midterm, what do you guys suggest be studied or emphasized most in a study section? I just want to utilize my time most efficiently.
by Jose Robles 1D
Sun Oct 27, 2019 8:53 pm
Forum: Trends in The Periodic Table
Topic: Electron Affinity on the Test
Replies: 3
Views: 9

Re: Electron Affinity on the Test

While I am also a student and cannot know for sure, I think it is safe to assume that anything taught in class is fair game on the test. Personally, I find it important to study it simply to have it in your memory, never hurts to know the periodic table a bit better.
by Jose Robles 1D
Sun Oct 27, 2019 8:48 pm
Forum: Resonance Structures
Topic: Resonance
Replies: 5
Views: 25

Re: Resonance

Resonance has to do with the ability of a compound to have interchangeable bonds or different means of creating its lewis structure. NO3 is a perfect example in that it can form a double bond with any of its oxygens.
by Jose Robles 1D
Sun Oct 27, 2019 8:42 pm
Forum: Ionic & Covalent Bonds
Topic: Double bond placement
Replies: 15
Views: 63

Re: Double bond placement

If a double bond occurs, then does that mean that the lone pairs are interchangeable without it effecting the lewis structure (for instance, like in nitrate NO3)? Like can the double bond occur at any pair of the oxygen without there being a difference?
by Jose Robles 1D
Sun Oct 27, 2019 8:37 pm
Forum: Ionic & Covalent Bonds
Topic: Metals Vs. Nonmetals
Replies: 8
Views: 41

Metals Vs. Nonmetals

Which form anions? Which form cations? And why?
by Jose Robles 1D
Sun Oct 27, 2019 8:35 pm
Forum: Ionic & Covalent Bonds
Topic: What is the difference between an anion and cation?
Replies: 7
Views: 28

What is the difference between an anion and cation?

A decent description or elaboration would be appreciated. Can you also please provide an example?
by Jose Robles 1D
Sun Oct 20, 2019 7:46 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Spin up and spin down
Replies: 13
Views: 57

Re: Spin up and spin down

I didn't necessarily understand this in lecture, but do we address it as spinning up or down if the electron travels clockwise or counter-clockwise?
by Jose Robles 1D
Sun Oct 20, 2019 7:42 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals
Replies: 8
Views: 50

Re: Orbitals

Can someone explain to me the specialty case of Chromium? With it having 4s1 instead of 4s2?
by Jose Robles 1D
Sun Oct 20, 2019 7:38 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Advice for studying
Replies: 50
Views: 241

Re: Advice for studying

Can someone point out to me a great drop in session for AAP? I went to one that was packed and didn't learn much? Like any recommendations for a great TA for study sessions?
by Jose Robles 1D
Sun Oct 20, 2019 7:34 pm
Forum: General Science Questions
Topic: Sapling Learning
Replies: 2
Views: 13

Sapling Learning

Can someone explain what this online portion is for? I received it with my textbook and wish to know how to use it to my advantage in studies.
by Jose Robles 1D
Sun Oct 20, 2019 7:28 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 1835

Re: Test 1 [ENDORSED]

Angela Prince 3B wrote:I can't find my test grades on ccle, where do I go?

I had the same problem, you should try to check your discussion section or go talk to your discussion TA if that doesn't work.
by Jose Robles 1D
Sun Oct 13, 2019 11:09 pm
Forum: SI Units, Unit Conversions
Topic: Percent Yield
Replies: 6
Views: 49

Re: Percent Yield

Usually you solve for the theoretical yield using the limiting reactant, which is then divided by the actual yield, then multiplied by 100%. The actual yield is usually given.
by Jose Robles 1D
Sun Oct 13, 2019 8:12 pm
Forum: Balancing Chemical Reactions
Topic: Writing Out Reactions
Replies: 6
Views: 32

Writing Out Reactions

Do we have to eventually remember reactions and formulas off the top of our head? Or will they always be given in questions? Or like say we are given the reactants in word form and then do we have to write it out?
by Jose Robles 1D
Sun Oct 13, 2019 7:31 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 127
Views: 75017

Re: Reading the textbook [ENDORSED]

Honestly I feel the same way when engaging in reading, but I find study groups make the experience more bearable. When I'm with a few committed friends I feel relaxed and motivated to finish the readings. Plus, if you don't get something you can just ask them on the spot to discuss key ideas.
by Jose Robles 1D
Sun Oct 13, 2019 7:25 pm
Forum: Limiting Reactant Calculations
Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
Replies: 66
Views: 927

Re: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]

I have a question about significant figures. What number do we base the amount of significant figures we use? Like in any problem. Usually we round the sig figs based on those given in the question, seen when numbers are given with excess zeros after decimal(0.500). Try to not round early in the qu...
by Jose Robles 1D
Sun Oct 13, 2019 7:18 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 1835

Re: Test 1 [ENDORSED]

KatherineValdez_4B wrote:Do we get the actual test back with the correct answers or just a grade?


While I'm not sure whether we get our midterms/final back, possibly Lavelle's attempt to preserve future test integrity, I believe once the TAs grade the smaller scale tests (tests 1/2) we get them back.
by Jose Robles 1D
Fri Oct 04, 2019 8:44 am
Forum: Empirical & Molecular Formulas
Topic: When should one start rounding in a problem?
Replies: 11
Views: 67

Re: When should one start rounding in a problem?

Makes sense, I wouldn't want to determine my empirical formula from a simple rounding off the top of my head. Thanks for the fast reply.
by Jose Robles 1D
Fri Oct 04, 2019 8:37 am
Forum: Significant Figures
Topic: How does one read sig figs?
Replies: 3
Views: 30

Re: How does one read sig figs?

Great answer and speedy reply, thanks.
by Jose Robles 1D
Fri Oct 04, 2019 8:32 am
Forum: Empirical & Molecular Formulas
Topic: When should one start rounding in a problem?
Replies: 11
Views: 67

When should one start rounding in a problem?

For instance, when finding mass ratios I would divide an assumed amount of Hydrogen by its atomic weight; should I divide by 1 or its actual weight of 1.007 (I've seen both actions performed in a discussion)? These questions tend to deal a lot with assumptions so insight would help me a ton.
by Jose Robles 1D
Fri Oct 04, 2019 8:25 am
Forum: SI Units, Unit Conversions
Topic: Why do we always need grams when solving a problem?
Replies: 6
Views: 47

Why do we always need grams when solving a problem?

For instance, say when we are given milligrams, why don't we solve in that unit rather than convert to grams first?
by Jose Robles 1D
Fri Oct 04, 2019 8:22 am
Forum: Significant Figures
Topic: How does one read sig figs?
Replies: 3
Views: 30

How does one read sig figs?

I am a bit confused about where to start reading sig figs. For example, how many are in 500 vs. 500.000?(please answer this and provide short explanation)
by Jose Robles 1D
Fri Oct 04, 2019 8:16 am
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 61
Views: 18433

Re: Final Jitters

Honestly the advice that an upperclassman gave me, doing a few problems a night(like 5-10, or build up to it), keeps me the loop during discussion and lecture. Simply start applying now so that the test seems less intimidating and you understand the lecture more when new material presents itself.
by Jose Robles 1D
Fri Oct 04, 2019 8:05 am
Forum: Balancing Chemical Reactions
Topic: When are atoms lost or created?
Replies: 14
Views: 133

When are atoms lost or created?

I understand that atoms are not destroyed during chemical reactions, but is there a case where atoms are lost or created in a reaction, and if so, is it covered in chem 14A?(To prepare for the future)

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