Search found 29 matches

by Jennifer 1G
Sun Jun 10, 2018 11:59 pm
Forum: Administrative Questions and Class Announcements
Topic: Grading question
Replies: 11
Views: 678

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...
by Jennifer 1G
Sun Jun 10, 2018 11:10 pm
Forum: General Science Questions
Topic: Final [ENDORSED]
Replies: 10
Views: 506

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...
by Jennifer 1G
Fri Jun 08, 2018 7:46 pm
Forum: General Science Questions
Topic: Final [ENDORSED]
Replies: 10
Views: 506

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.
by Jennifer 1G
Tue Jun 05, 2018 8:18 pm
Forum: Lewis Structures
Topic: Test 3 Question 2
Replies: 5
Views: 223

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.
by Jennifer 1G
Fri Jun 01, 2018 8:08 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lewis Structure for VSEPR
Replies: 2
Views: 96

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...
by Jennifer 1G
Fri Jun 01, 2018 7:56 pm
Forum: Bond Lengths & Energies
Topic: Test 3 bond length question
Replies: 8
Views: 374

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 ...
by Jennifer 1G
Fri Jun 01, 2018 7:33 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Helpful Chart
Replies: 18
Views: 516

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 ...
by Jennifer 1G
Wed May 23, 2018 8:49 pm
Forum: Hybridization
Topic: Polarizability
Replies: 2
Views: 1636

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-...
by Jennifer 1G
Mon May 21, 2018 10:32 am
Forum: Properties of Electrons
Topic: Midterm #2 question 4a,b
Replies: 5
Views: 289

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.
by Jennifer 1G
Fri May 18, 2018 8:30 pm
Forum: Resonance Structures
Topic: Resonance Structures [ENDORSED]
Replies: 4
Views: 190

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!
by Jennifer 1G
Fri May 18, 2018 8:20 pm
Forum: Quantum Numbers and The H-Atom
Topic: Midterm Question
Replies: 13
Views: 478

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!
by Jennifer 1G
Mon May 14, 2018 1:02 am
Forum: Ionic & Covalent Bonds
Topic: VALENCE ELECTRONS [ENDORSED]
Replies: 16
Views: 485

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...
by Jennifer 1G
Mon May 14, 2018 1:00 am
Forum: Ionic & Covalent Bonds
Topic: VALENCE ELECTRONS [ENDORSED]
Replies: 16
Views: 485

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...
by Jennifer 1G
Sun May 13, 2018 11:16 pm
Forum: Ionic & Covalent Bonds
Topic: VALENCE ELECTRONS [ENDORSED]
Replies: 16
Views: 485

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.
by Jennifer 1G
Fri May 11, 2018 12:58 pm
Forum: Quantum Numbers and The H-Atom
Topic: Midterm Question
Replies: 13
Views: 478

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.
by Jennifer 1G
Wed May 09, 2018 2:38 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configuration-(Sn)
Replies: 5
Views: 253

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!
by Jennifer 1G
Sun May 06, 2018 11:49 pm
Forum: Ionic & Covalent Bonds
Topic: van der waals forces [ENDORSED]
Replies: 3
Views: 111

Re: van der waals forces [ENDORSED]

I don't remember this being mentioned, so I don't think it will be on the midterm.
by Jennifer 1G
Sun May 06, 2018 11:46 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Lewis Structure [ENDORSED]
Replies: 7
Views: 258

Re: Lewis Structure [ENDORSED]

I believe that the response to this question during lecture was that it didn't matter.
by Jennifer 1G
Sun May 06, 2018 11:30 pm
Forum: Empirical & Molecular Formulas
Topic: Order of Elements [ENDORSED]
Replies: 3
Views: 251

Re: Order of Elements [ENDORSED]

As the previous post mentions, I also start off with C, H and O!
by Jennifer 1G
Fri Apr 20, 2018 8:24 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg Equation & Test 2
Replies: 4
Views: 201

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.
by Jennifer 1G
Fri Apr 20, 2018 8:17 pm
Forum: Empirical & Molecular Formulas
Topic: Test #1 Question
Replies: 7
Views: 387

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!
by Jennifer 1G
Fri Apr 20, 2018 8:07 pm
Forum: Administrative Questions and Class Announcements
Topic: Test Number 1
Replies: 10
Views: 458

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.
by Jennifer 1G
Sun Apr 15, 2018 11:25 pm
Forum: Limiting Reactant Calculations
Topic: Showing Work
Replies: 2
Views: 126

Re: Showing Work

I think you should show most work, especially on tests! But, you can always ask your TA just to make sure.
by Jennifer 1G
Sun Apr 15, 2018 11:19 pm
Forum: Empirical & Molecular Formulas
Topic: Quiz 1 Last Question Help [ENDORSED]
Replies: 3
Views: 276

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...
by Jennifer 1G
Sun Apr 15, 2018 11:10 pm
Forum: Properties of Light
Topic: Homework? [ENDORSED]
Replies: 10
Views: 370

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.
by Jennifer 1G
Sun Apr 15, 2018 10:53 pm
Forum: Empirical & Molecular Formulas
Topic: Periodic Table Memorization [ENDORSED]
Replies: 8
Views: 398

Re: Periodic Table Memorization [ENDORSED]

I believe a periodic table will be provided to us on exams.
by Jennifer 1G
Sun Apr 15, 2018 10:50 pm
Forum: Significant Figures
Topic: Expected mastery of Significant Figures
Replies: 6
Views: 289

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.
by Jennifer 1G
Sun Apr 15, 2018 10:50 pm
Forum: Significant Figures
Topic: Expected mastery of Significant Figures
Replies: 6
Views: 289

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.
by Jennifer 1G
Sun Apr 15, 2018 10:43 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molar Mass
Replies: 9
Views: 428

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.

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