Search found 29 matches
- Sun Jun 10, 2018 11:59 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Grading question
- Replies: 11
- Views: 1796
Re: Grading question
When I read this on the syllabus, I interpreted it as: if you get a 50% to less than 70%, it will be treated as if you got a C-. Because of this, I think 250 points does mean that you are guaranteed a C-, but I may have interpreted incorrectly. I also thought that getting 250 points meant a C-. But...
- Sun Jun 10, 2018 11:10 pm
- Forum: General Science Questions
- Topic: Final [ENDORSED]
- Replies: 10
- Views: 1415
Re: Final [ENDORSED]
A TA told me that it would be similar to the set up from midterm 1 and 2. So 8 questions total. 4 questions may be from either midterm 1 or 2, and the other 4 will be new material. But each question will have multiple parts. But I'm not sure how accurate this is. By "both midterms" you're...
- Fri Jun 08, 2018 7:46 pm
- Forum: General Science Questions
- Topic: Final [ENDORSED]
- Replies: 10
- Views: 1415
Re: Final [ENDORSED]
During today's review session someone asked if the final was more focused on topics covered after the midterm and I believe the answer was basically that topics would be given equal importance.
- Tue Jun 05, 2018 8:18 pm
- Forum: Lewis Structures
- Topic: Test 3 Question 2
- Replies: 5
- Views: 792
Re: Test 3 Question 2
I got full credit on this question by using single bonds, so Ti has 8 electrons and each Chlorine has an octet!
I just saw the picture posted. Ti should be in the center I believe.
I just saw the picture posted. Ti should be in the center I believe.
- Fri Jun 01, 2018 8:08 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lewis Structure for VSEPR
- Replies: 2
- Views: 368
Re: Lewis Structure for VSEPR
I think it was mentioned by the TA's/Lavelle to draw the lewis structure with the least resonance. I'm not sure for VSEPR, but it's probably a good idea to keep drawing the most stable structure so that you don't forget to do so for a lewis structure during the final and such. But this is a good que...
- Fri Jun 01, 2018 7:56 pm
- Forum: Bond Lengths & Energies
- Topic: Test 3 bond length question
- Replies: 8
- Views: 1052
Re: Test 3 bond length question
The wording of the question may have been somewhat confusing. We were first asking you to circle the bond that is shorter, or longer depending on your test day. Then you were asked to say if the one you circled is the stronger of the two (or weaker depending on the day). So no matter which one you ...
- Fri Jun 01, 2018 7:33 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Helpful Chart
- Replies: 18
- Views: 1566
Re: Helpful Chart
We made a similar chart in discussion too. I want to point out that I believe our TA mentioned something about the angles being less than 109.5 in some cases, I'm not exactly sure why or in what instances, but I think he mentioned lone pairs. I also think Lavelle said that we don't have to know the ...
- Wed May 23, 2018 8:49 pm
- Forum: Hybridization
- Topic: Polarizability
- Replies: 2
- Views: 2970
Re: Polarizability
According to the book, polarizability increases as the ion gets larger and less electronegative. Using this definition, we can look at the four anions and begin analyzing. Br- is obviously the biggest anion because it has 3 shells shielding for it; Cl- is also the same, but with 2 instead of 3; N3-...
- Mon May 21, 2018 10:32 am
- Forum: Properties of Electrons
- Topic: Midterm #2 question 4a,b
- Replies: 5
- Views: 820
Re: Midterm #2 question 4a,b
I suggest watching the video module on this topic! I believe it was mentioned that the wavelength could be detected up to the negative 12 or 15 power, but I'm not exactly sure if an exact value was said.
- Fri May 18, 2018 8:30 pm
- Forum: Resonance Structures
- Topic: Resonance Structures [ENDORSED]
- Replies: 4
- Views: 576
Re: Resonance Structures [ENDORSED]
I think it was mentioned that in exams our final answer has to be the one with less formal charge/most stable, so that's something to keep in mind!
- Fri May 18, 2018 8:20 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Midterm Question
- Replies: 13
- Views: 1425
Re: Midterm Question
Jacob Samuels 1E wrote:The amount of ml values is always 1 for s, 3 for p, 5 for d, and 7 for f
I believe the values you provided are actually l values!
- Mon May 14, 2018 1:02 am
- Forum: Ionic & Covalent Bonds
- Topic: VALENCE ELECTRONS [ENDORSED]
- Replies: 16
- Views: 2151
Re: VALENCE ELECTRONS [ENDORSED]
You can tell how many valence electrons there are by checking on the vertical line the element is on. For example, Hydrogen has 1 valence electron and Oxygen has 6. As part of my previous post, according to google, Helium has two valence electrons, so this pattern may not always work. Why is helium...
- Mon May 14, 2018 1:00 am
- Forum: Ionic & Covalent Bonds
- Topic: VALENCE ELECTRONS [ENDORSED]
- Replies: 16
- Views: 2151
Re: VALENCE ELECTRONS [ENDORSED]
You can tell how many valence electrons there are by checking on the vertical line the element is on. For example, Hydrogen has 1 valence electron and Oxygen has 6. As part of my previous post- According to google, Helium has two valence electrons, so this pattern may not always work. Why is helium...
- Sun May 13, 2018 11:16 pm
- Forum: Ionic & Covalent Bonds
- Topic: VALENCE ELECTRONS [ENDORSED]
- Replies: 16
- Views: 2151
Re: VALENCE ELECTRONS [ENDORSED]
You can tell how many valence electrons there are by checking on the vertical line the element is on. For example, Hydrogen has 1 valence electron and Oxygen has 6.
- Fri May 11, 2018 12:58 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Midterm Question
- Replies: 13
- Views: 1425
Re: Midterm Question
I believe amount of orbitals is referring to how many ml values there are. During Friday's review session, it was stated that ml can be calculated using ml=2l+1. So being given or knowing the l value, you can find ml. I think the number ml gives is the number of orbitals.
- Wed May 09, 2018 2:38 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configuration-(Sn)
- Replies: 5
- Views: 717
Re: Electron Configuration-(Sn)
danielruiz1G wrote:When writing this out just remember that it is written from the lower energy levels to highest so "p,s,d,f" and must be filled in that order.
May you please explain this as the example above shows the order to be d, s and p. Thank you!
- Sun May 06, 2018 11:49 pm
- Forum: Ionic & Covalent Bonds
- Topic: van der waals forces [ENDORSED]
- Replies: 3
- Views: 448
Re: van der waals forces [ENDORSED]
I don't remember this being mentioned, so I don't think it will be on the midterm.
- Sun May 06, 2018 11:46 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Lewis Structure [ENDORSED]
- Replies: 7
- Views: 967
Re: Lewis Structure [ENDORSED]
I believe that the response to this question during lecture was that it didn't matter.
- Sun May 06, 2018 11:30 pm
- Forum: Empirical & Molecular Formulas
- Topic: Order of Elements [ENDORSED]
- Replies: 3
- Views: 593
Re: Order of Elements [ENDORSED]
As the previous post mentions, I also start off with C, H and O!
- Fri Apr 20, 2018 8:24 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Heisenberg Equation & Test 2
- Replies: 4
- Views: 507
Re: Heisenberg Equation & Test 2
In today's lecture, I'm sure Lavelle said it would not be on this upcoming quiz. He also sent out an e-mail about the quiz.
- Fri Apr 20, 2018 8:17 pm
- Forum: Empirical & Molecular Formulas
- Topic: Test #1 Question
- Replies: 7
- Views: 855
Re: Test #1 Question
Can someone please tell me what they got for the first problem on this question. I thought I got it right, but it was marked wrong. (Either the molecular or empirical is fine since I can find out the other one). Thank you!
- Fri Apr 20, 2018 8:07 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test Number 1
- Replies: 10
- Views: 1268
Re: Test Number 1
I believe my T.A mentioned the average score being 25 for his sections. A previous post mentions that their T.A had an average of 22, so it might be similar.
- Sun Apr 15, 2018 11:25 pm
- Forum: Limiting Reactant Calculations
- Topic: Showing Work
- Replies: 2
- Views: 361
Re: Showing Work
I think you should show most work, especially on tests! But, you can always ask your TA just to make sure.
- Sun Apr 15, 2018 11:19 pm
- Forum: Empirical & Molecular Formulas
- Topic: Quiz 1 Last Question Help [ENDORSED]
- Replies: 3
- Views: 678
Re: Quiz 1 Last Question Help [ENDORSED]
On the website, there is a video posted about this topic. I think it mentioned that at empirical formula was the ratio of the molecular formula. It sounds like we took similar steps. Although I'm not exactly sure if I did this right, I counted the total of each element and wrote the molecular formul...
- Sun Apr 15, 2018 11:10 pm
- Forum: Properties of Light
- Topic: Homework? [ENDORSED]
- Replies: 10
- Views: 1098
Re: Homework? [ENDORSED]
I'm sure it was mentioned in class by Lavelle that the problems we do for homework could depend on what day our discussion is since we will have covered more of a specific section later on in the week.
- Sun Apr 15, 2018 10:53 pm
- Forum: Empirical & Molecular Formulas
- Topic: Periodic Table Memorization [ENDORSED]
- Replies: 8
- Views: 863
Re: Periodic Table Memorization [ENDORSED]
I believe a periodic table will be provided to us on exams.
- Sun Apr 15, 2018 10:50 pm
- Forum: Significant Figures
- Topic: Expected mastery of Significant Figures
- Replies: 6
- Views: 570
Re: Expected mastery of Significant Figures
I believe I remember it being mentioned in lecture by Lavelle that we didn't have to know by the first exam, but I am not sure exactly by when we should be comfortable with them.
- Sun Apr 15, 2018 10:50 pm
- Forum: Significant Figures
- Topic: Expected mastery of Significant Figures
- Replies: 6
- Views: 570
Re: Expected mastery of Significant Figures
I believe I remember it being mentioned in lecture by Lavelle that we didn't have to know by the first exa, but I am not sure exactly by when we should be comfortable with them.
- Sun Apr 15, 2018 10:43 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Molar Mass
- Replies: 9
- Views: 1105
Re: Molar Mass
I believe you add up all the weights of the elements. For example, in H20, you would multiply the weight of Hydrogen times two and add the weight of oxygen. I just noticed someone used H20 as an example previously, but this applies for other examples.