Search found 51 matches
- Sat Dec 07, 2019 7:05 pm
- Forum: Naming
- Topic: latin names
- Replies: 3
- Views: 246
Re: latin names
Another example would also be plumbate for lead.
- Sat Dec 07, 2019 7:02 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: determining number of hydrogen bonding sites
- Replies: 3
- Views: 386
Re: determining number of hydrogen bonding sites
Recall that hydrogen bonds can form when a hydrogen that is bonded to a Nitrogen, Oxygen, or Fluorine is strongly attracted to a Nitrogen, Oxygen, or Fluorine with a lone pair. In problems where it asks you to find how many hydrogen bonding sites there are, you should look for the hydrogens bonded ...
- Sat Dec 07, 2019 12:39 pm
- Forum: General Science Questions
- Topic: Exam Subjects
- Replies: 5
- Views: 519
Re: Exam Subjects
I really doubt that the exam will be on topics that we haven't yet tested on. It will most likely be an equal distribution of topics from before the midterm and after the midterm. I'm assuming that the exam will be hard, not because of the content, but the combination of different concepts. Or bett...
- Sat Dec 07, 2019 12:37 pm
- Forum: General Science Questions
- Topic: Exam Subjects
- Replies: 5
- Views: 519
Re: Exam Subjects
I know the exam is cumulative but I would also assume that material from post-midterm would be more heavily emphasized.
- Sat Dec 07, 2019 12:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Exam Place
- Replies: 3
- Views: 305
Re: Final Exam Place
Thank you!
- Sat Dec 07, 2019 12:34 pm
- Forum: General Science Questions
- Topic: Final
- Replies: 3
- Views: 451
Re: Final
I'm also wondering the same thing^^^^
- Sun Dec 01, 2019 9:54 pm
- Forum: Naming
- Topic: Final Exam?
- Replies: 20
- Views: 1151
Re: Final Exam?
It is cumulative and regarding the outlines, just make sure to understand conceptually the topics discussed in each and how they form connections with each other.
- Sun Dec 01, 2019 9:52 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Final Exam
- Replies: 10
- Views: 713
Re: Final Exam
It is cumulative but I would suppose that more material after the midterm would be emphasized.
- Sun Dec 01, 2019 9:48 pm
- Forum: Student Social/Study Group
- Topic: Week 10 Chemistry Community
- Replies: 9
- Views: 765
Re: Week 10 Chemistry Community
How many posts should we have by then?
- Sun Dec 01, 2019 9:47 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Grades
- Replies: 15
- Views: 1063
Re: Grades
Dr. Lavelle's syllabus says that you need at least a 50% to get a passing grade in the class.
- Sun Dec 01, 2019 9:46 pm
- Forum: Bronsted Acids & Bases
- Topic: Final
- Replies: 13
- Views: 859
Re: Final
It'd also be a good idea to look at the outlines he has. All the topics are listed there.
- Sun Nov 24, 2019 12:59 pm
- Forum: Biological Examples
- Topic: What should we know for the final?
- Replies: 9
- Views: 1034
Re: What should we know for the final?
Without myoglobin, is hemoglobin square planer about Fe? Isn't hemoglobin just 4 myoglobin-like molecules joined together? It should have the same shape I believe? Yea! Myoglobin is a cytoplasmic protein that binds oxygen on a heme group. It harbors only one heme group, whereas hemoglobin has four.
- Sun Nov 24, 2019 12:50 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Thanksgiving Break
- Replies: 4
- Views: 466
Re: Thanksgiving Break
VioletKo3F wrote:Does anyone know if there's discussion on Wednesday?
Lavelle sent out an email explaining how if discussions were Wednesday after 3pm then they were going to be canceled.
- Sun Nov 24, 2019 12:48 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final exam
- Replies: 17
- Views: 926
Re: Final exam
Yea! Basically everything that we have learned in lecture is fair game for the final.
- Sun Nov 24, 2019 12:46 pm
- Forum: Bronsted Acids & Bases
- Topic: Bronsted vs. Lewis Acids
- Replies: 4
- Views: 274
Re: Bronsted vs. Lewis Acids
Haley Pham 4I wrote:Bronsted acids are are proton donors, while Lewis acids are electron acceptors. All Bronsted acids are Lewis acids, but not all Lewis acids are Bronsted acids.
Similarily all Bronsted bases are Lewis bases but not all Lewis bases are Bronsted bases.
- Sun Nov 24, 2019 12:41 pm
- Forum: General Science Questions
- Topic: Sig Figs
- Replies: 7
- Views: 459
Re: Sig Figs
Using the correct number of sig figs could never hurt but I would assume that if you don't the loss of points would be minimal.
- Sun Nov 17, 2019 10:28 pm
- Forum: Student Social/Study Group
- Topic: Final
- Replies: 11
- Views: 800
Re: Final
Jamie Hwang 3H wrote:Does anyone know if the final will be cumulative of everything we have done this quarter or is it just stuff we learn after the midterm?
It's a cumulative 3 hour final on Sunday, December 8th.
- Sun Nov 17, 2019 10:10 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Week 8 HW
- Replies: 4
- Views: 311
Re: Week 8 HW
I'd personally focus on the material after the midterm that I least understand in order to understand it more for test #2.
- Sun Nov 17, 2019 10:09 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: so2?
- Replies: 1
- Views: 164
Re: so2?
SO2 has a region of unequal sharing, in which when you draw the VESPR model of it, you see that where the lone pairs are there is a bent shape that is less electronegative. Therefore, the oxygens at the bottom are more negative making SO2 a polar molecule.
- Sun Nov 17, 2019 10:06 pm
- Forum: Hybridization
- Topic: Test 2
- Replies: 11
- Views: 594
Re: Test 2
I believe Lavelle said in lecture on Friday that hybridization wouldn't be on the test.
- Sun Nov 17, 2019 10:05 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone Pairs
- Replies: 10
- Views: 562
Re: Lone Pairs
Lone pairs cause repulsion and this in turn changes the geometrical arrangement.
- Sun Nov 10, 2019 9:41 pm
- Forum: General Science Questions
- Topic: Midterms
- Replies: 22
- Views: 954
Re: Midterms
I believe the next test happening on week 8 will have everything from the second part of 2d to the information we get to right before the next test.
- Sun Nov 10, 2019 9:36 pm
- Forum: Electronegativity
- Topic: Periodic Trend
- Replies: 13
- Views: 816
Re: Periodic Trend
In general, for electronegativity just remember that Fluorine is the most electronegative and from there it decreases down and to the left from there.
- Sun Nov 10, 2019 9:30 pm
- Forum: Electronegativity
- Topic: memorizing tables
- Replies: 9
- Views: 342
Re: memorizing tables
It is important to know the trends going across the table however, I don't think he will ever ask a question regarding specific personalized numbers to an atom.
- Sun Nov 10, 2019 9:25 pm
- Forum: Student Social/Study Group
- Topic: Study Tips
- Replies: 58
- Views: 4540
Re: Study Tips
Does anyone have any advice on how to take really good notes during lecture? I usually copy the slides but I always feel like he says some important things, I just never catch them on time since I'm too busying copying what the slides say The first few weeks I would focus too much on taking notes a...
- Sun Nov 10, 2019 8:47 pm
- Forum: Lewis Structures
- Topic: Electronegative
- Replies: 14
- Views: 851
Re: Electronegative
As for the trend just remember that Fluorine is the most electronegative atom and therefore it decreases going down and to the left.
- Sun Nov 10, 2019 8:45 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Writing e- Configurations
- Replies: 15
- Views: 687
Re: Writing e- Configurations
Usually the question will be specific regarding what it wants, but my TA said that unless it states to do the FULL electron configuration to just do the notation using the noble gas.
- Sun Nov 10, 2019 8:38 pm
- Forum: Electronegativity
- Topic: Electron Affinity and Electronegativity
- Replies: 7
- Views: 441
Re: Electron Affinity and Electronegativity
Electron affinity is the amount of energy released when an electron is added to the neutral atom, mean while electronegativity is the tendency of an atom to attract an electron towards it.
- Sun Nov 10, 2019 8:31 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Second Discussion Test
- Replies: 9
- Views: 560
Re: Second Discussion Test
So for the 2nd test there will only be material from after the midterm?
- Sun Nov 10, 2019 8:28 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Commuters
- Replies: 3
- Views: 194
Re: Commuters
I would say stay on campus as long as possible and really take advantage of the breaks between your classes. Although review sessions do help, they aren't mandatory to be successful in the class and as long as you understand the information conceptually and practice homework/additional problems you ...
- Sun Nov 10, 2019 8:24 pm
- Forum: Student Social/Study Group
- Topic: Midterm Average
- Replies: 12
- Views: 831
Re: Midterm Average
What was the average for test #1?
- Sun Oct 27, 2019 10:37 pm
- Forum: Ionic & Covalent Bonds
- Topic: periodic table
- Replies: 10
- Views: 412
Re: periodic table
Both electronegativity and ionization energy increases from left to right. The same is true for electron affinity. the opposite however is true for the atomic radius.
- Sun Oct 27, 2019 10:34 pm
- Forum: Electronegativity
- Topic: Finding Electronegativity
- Replies: 2
- Views: 137
Re: Finding Electronegativity
The electronegativity trend increases from left to right and from bottom up. Therefore the order would be indium, tin, antimony, and finally selenium. (increasing as you go from left to right)
- Sun Oct 27, 2019 10:26 pm
- Forum: Lewis Structures
- Topic: Orbitals
- Replies: 9
- Views: 497
Re: Orbitals
Yes because what comes before it is 3d10 and because 4s2 is in n=4 you remove from t first.
- Sun Oct 27, 2019 10:19 pm
- Forum: Lewis Structures
- Topic: Choosing the central atom
- Replies: 16
- Views: 793
Re: Choosing the central atom
It typically is the one with the lowest ionization energy.
- Sun Oct 27, 2019 10:14 pm
- Forum: Ionic & Covalent Bonds
- Topic: electron configuration order
- Replies: 6
- Views: 416
Re: electron configuration order
5s comes before, but don't worry too much about the f-block since Dr. Lavelle stated in lecture that we wouldn't really be dealing with it.
- Sun Oct 20, 2019 10:40 am
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Frequencies
- Replies: 7
- Views: 484
Re: Frequencies
I think it would definitely be helpful to know the difference and in which categories the Lyman and Balmer series fall on. Also, there is a homework question that asks to order wavelengths in order of energy (or might be length), in any case maybe know the general order.
- Sun Oct 20, 2019 10:29 am
- Forum: Photoelectric Effect
- Topic: The Rydberg Formula and the Hydrogen Atomic Spectrum
- Replies: 4
- Views: 302
Re: The Rydberg Formula and the Hydrogen Atomic Spectrum
It can only work for Hydrogen, or other one electron systems because the Rydberg formula is used to predict the wavelength of light that results from a single electron moving between an atom's energy levels.
- Sun Oct 20, 2019 10:19 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Hund's rule and Pauli Exclusion Principle
- Replies: 14
- Views: 848
Re: Hund's rule and Pauli Exclusion Principle
Both are used together to find the correct ground state electron configuration. The Pauli Exclusion principle just tells you that in one individual level your electron direction has to be opposite of each other (have different spins). Hund's says you have to fill up every level before attempting to ...
- Sun Oct 20, 2019 10:13 am
- Forum: *Shrodinger Equation
- Topic: Shrodinger Equation
- Replies: 3
- Views: 139
Re: Shrodinger Equation
Dr. Lavelle said in lecture that it wasn't necessary to know how to derive it for this class.
- Sun Oct 20, 2019 10:11 am
- Forum: Properties of Electrons
- Topic: Energy increasing
- Replies: 7
- Views: 513
Re: Energy increasing
The principal quantum number, n, determines the energy level of the electron in an atom. There are n^2 orbitals for each energy level.
- Sun Oct 13, 2019 10:41 pm
- Forum: Significant Figures
- Topic: sig figs and periodic tables
- Replies: 11
- Views: 708
Re: sig figs and periodic tables
I dont think it should be as long as your final answer is not more sig figs than the least digit you used.
- Sun Oct 13, 2019 10:39 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Test 1 [ENDORSED]
- Replies: 107
- Views: 21180
Re: Test 1 [ENDORSED]
I was wondering the same thing, if I had to take a guess I would say sometime in your specific upcoming discussion days.
- Sun Oct 13, 2019 10:36 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 413291
Re: Advice from a Medical Student [ENDORSED]
Thank you so much for the advice!
- Sun Oct 13, 2019 10:35 pm
- Forum: Properties of Electrons
- Topic: Energy levels
- Replies: 4
- Views: 141
Re: Energy levels
For my understanding as well, there is an infinte number of energy levels but you must remember that they are always integers.
- Sun Oct 13, 2019 10:32 pm
- Forum: Trends in The Periodic Table
- Topic: Element Names
- Replies: 8
- Views: 1031
Re: Element Names
There is a periodic table on Lavelle's website and also for future reference it is in black and white just like it was in the first test.
- Sun Oct 06, 2019 8:19 pm
- Forum: SI Units, Unit Conversions
- Topic: Sig figs
- Replies: 5
- Views: 205
Re: Sig figs
It basically is just telling you that there are 3 sig figs and given that that is your least number of sig figs in the problem, that amount would be the one you would use for your answer.
- Sun Oct 06, 2019 8:16 pm
- Forum: Balancing Chemical Reactions
- Topic: Balancing Reactions
- Replies: 25
- Views: 2160
Re: Balancing Reactions
It's important to balance chemical equations because aside from the Law of Conservation of Mass where matter can not be created nor destroyed, you need to have the correct molar ratio in order to be able to conduct any sort of stoichiometric problem.
- Sun Oct 06, 2019 8:14 pm
- Forum: General Science Questions
- Topic: Rusty on High School Chem [ENDORSED]
- Replies: 347
- Views: 435552
Re: Rusty on High School Chem [ENDORSED]
Personally Lavelle's modules help out a lot and also what has helped me with topics I struggle with is to google problems aside from the book and see if I find a way that makes more sense to me. Thanks to eeryone for the tips!
- Sun Oct 06, 2019 8:06 pm
- Forum: Significant Figures
- Topic: When do zeros count?
- Replies: 5
- Views: 215
Re: When do zeros count?
The zeroes before a non zero number never count (ie 0.0005 has 1 sigfig) The zeroes after a non zero count because they are telling you that you are sure of that digit until that last zero (ie 12.2300 has 6sf) because a sig fig is all the digits that you are sure of plus the one you are unsure of, t...
- Sun Oct 06, 2019 8:02 pm
- Forum: Limiting Reactant Calculations
- Topic: limiting reactant
- Replies: 9
- Views: 582
Re: limiting reactant
Not necessarily, you first would have to see which ratio you need using your balanced chemical equation and then convert the grams you were given into moles and see if it fits the ratio, you have. If it does not you have to check if it either has more or less than you need and evaluate from there.