Search found 40 matches

by Megan ODonnell 1K
Sun Nov 29, 2020 11:53 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: polar v nonpolar molecules
Replies: 15
Views: 31

Re: polar v nonpolar molecules

Usually I first try to determine through symmetry, if the shape of the molecule and the bond angles are the same throughout, it is most likely nonpolar. However compare and contrast the bonded atoms to the central atom, an atom with a fluorine bonded on one side and a hydrogen bonded on the other si...
by Megan ODonnell 1K
Sun Nov 29, 2020 11:51 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Remembering Bond Degrees
Replies: 7
Views: 26

Re: Remembering Bond Degrees

I made a Quizlet to remember all of the potential bond angles a specific molecular shape could have, however when determining each individual angle I try to draw out the lewis structure and visualize the angle in relation to all of the other ones.
by Megan ODonnell 1K
Sun Nov 29, 2020 11:48 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: H2O VSEPR
Replies: 27
Views: 67

Re: H2O VSEPR

H2O is bent since there are two bonds formed and two lone pairs which force the bonded oxygens closer to each other.
by Megan ODonnell 1K
Sun Nov 29, 2020 11:47 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Easiest Way to Memorize Shape Names
Replies: 9
Views: 18

Re: Easiest Way to Memorize Shape Names

I make a Quizlet and go through it until I get all of the shape names correct.
by Megan ODonnell 1K
Sun Nov 29, 2020 11:46 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining Molecular Shape
Replies: 9
Views: 20

Re: Determining Molecular Shape

No, when determining molecular shape each bond (whether it be single, double, or triple) counts as one entity.
by Megan ODonnell 1K
Mon Nov 23, 2020 10:22 am
Forum: Ionic & Covalent Bonds
Topic: Ionic vs. Covalent Compounds
Replies: 7
Views: 37

Re: Ionic vs. Covalent Compounds

NaCl is ionic because it has a great enough difference in electronegativities between the metal and non metal, whereas HCl doesn't have a large enough difference in electronegativities for the Cl to take the electron from H. Usually, a metal and a nonmetal form an ionic bond, and two nonmetals form ...
by Megan ODonnell 1K
Mon Nov 23, 2020 10:20 am
Forum: Ionic & Covalent Bonds
Topic: C-H bond polarity
Replies: 10
Views: 37

Re: C-H bond polarity

The difference in electronegativities isn't significant enough for it to be a polar bond.
by Megan ODonnell 1K
Mon Nov 23, 2020 10:20 am
Forum: Ionic & Covalent Bonds
Topic: Polar Bonds
Replies: 16
Views: 46

Re: Polar Bonds

Usually symmetry, and if you can determine the difference in electronegativities. If the shape of the molecule is mostly symmetrical it is more likely to be non polar.
by Megan ODonnell 1K
Mon Nov 23, 2020 10:18 am
Forum: Ionic & Covalent Bonds
Topic: Ionic and Covalent Bonds
Replies: 7
Views: 23

Re: Ionic and Covalent Bonds

Ionic bonds are between a metal and non metal whereas a covalent bond is between two nonmetals.
by Megan ODonnell 1K
Mon Nov 23, 2020 10:17 am
Forum: Ionic & Covalent Bonds
Topic: How to determine which molecule is more ionic?
Replies: 11
Views: 62

Re: How to determine which molecule is more ionic?

Determine the difference in electronegativities between the two atoms in the molecule you are examining, and which ever molecule produces the greater difference is the molecule that is more ionic.
by Megan ODonnell 1K
Sun Nov 15, 2020 4:20 pm
Forum: Lewis Structures
Topic: Central Atom
Replies: 20
Views: 74

Re: Central Atom

It is usually the least electronegative atom, however hydrogen is an exception to this rule.
by Megan ODonnell 1K
Sun Nov 15, 2020 4:19 pm
Forum: Lewis Structures
Topic: Nitrite vs Nitrate
Replies: 17
Views: 80

Re: Nitrite vs Nitrate

Nitrate has three oxygens and nitrite has two oxygens. Generally if the ending is "ite" it has one less than the "ate" version.
by Megan ODonnell 1K
Sun Nov 15, 2020 4:17 pm
Forum: Lewis Structures
Topic: Chemical Names
Replies: 9
Views: 32

Re: Chemical Names

I am not sure, but it is not outlined in the syllabus so I doubt it.
by Megan ODonnell 1K
Sun Nov 15, 2020 4:15 pm
Forum: Properties of Light
Topic: Study Advice
Replies: 50
Views: 197

Re: Study Advice

I haven't been to the step-up sessions but I know that when I took the last midterm for this class, a couple of the questions came directly out of the textbook and so I found that doing the practice problems ended up being really helpful.
by Megan ODonnell 1K
Sun Nov 15, 2020 4:13 pm
Forum: Properties of Light
Topic: Videos
Replies: 12
Views: 54

Re: Videos

Khan academy always has good review videos that go into great detail and are good at explaining concepts!
by Megan ODonnell 1K
Wed Nov 04, 2020 8:58 pm
Forum: Properties of Light
Topic: How are you guys studying for the midterm?
Replies: 19
Views: 59

Re: How are you guys studying for the midterm?

I am working through the textbook problems, the homework problems, and the problems on the worksheet that my TA gave me.
by Megan ODonnell 1K
Wed Nov 04, 2020 8:56 pm
Forum: Properties of Light
Topic: Webcam for midterm
Replies: 6
Views: 26

Re: Webcam for midterm

I think you can use your phone or ipad if you can't get a webcam.
by Megan ODonnell 1K
Wed Nov 04, 2020 8:55 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 196
Views: 901

Re: How are you studying?

I have been going through one textbook unit (ie Focus 1A and the practice problems) per night, working on the sapling homework, and doing the worksheets my TA has given me.
by Megan ODonnell 1K
Wed Nov 04, 2020 8:52 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm grades
Replies: 19
Views: 172

Re: Midterm grades

They should be out by sometime tomorrow!
by Megan ODonnell 1K
Fri Oct 30, 2020 5:49 pm
Forum: Properties of Light
Topic: How to remember what v is in equations
Replies: 46
Views: 140

Re: How to remember what v is in equations

v with italics is frequency whereas v non-italics is speed.
by Megan ODonnell 1K
Fri Oct 30, 2020 5:48 pm
Forum: Properties of Light
Topic: Midterm Question
Replies: 11
Views: 144

Re: Midterm Question

It will cover fundamentals up to focus 1D!
by Megan ODonnell 1K
Fri Oct 30, 2020 5:47 pm
Forum: Administrative Questions and Class Announcements
Topic: Participation Points [ENDORSED]
Replies: 62
Views: 914

Re: Participation Points [ENDORSED]

Thank you for the info!
by Megan ODonnell 1K
Fri Oct 30, 2020 5:42 pm
Forum: Properties of Light
Topic: Is c always the speed of light?
Replies: 72
Views: 253

Re: Is c always the speed of light?

We have only used c as the speed of light so far!
by Megan ODonnell 1K
Fri Oct 30, 2020 5:40 pm
Forum: Properties of Light
Topic: Midterm
Replies: 42
Views: 371

Re: Midterm

It is 12 problems on CCLE during discussion section
by Megan ODonnell 1K
Tue Oct 20, 2020 5:03 pm
Forum: SI Units, Unit Conversions
Topic: Do I need to do very single textbook question on the syllabus?
Replies: 34
Views: 193

Re: Do I need to do very single textbook question on the syllabus?

It's not going to hurt your grade if you don't do every single question, but I would do a few questions from each segment in order to self study for the exam and make sure you know all of the topics that are being covered.
by Megan ODonnell 1K
Tue Oct 20, 2020 5:01 pm
Forum: Administrative Questions and Class Announcements
Topic: Built-in webcams/Equipment request [ENDORSED]
Replies: 22
Views: 710

Re: Built-in webcams/Equipment request [ENDORSED]

I think that they strongly recommend that we have external webcams because of the way that the lockdown browser works, but it seems like you can still take the test without one, maybe just less conveniently. My TA also said that maybe we will be able to take the test on an ipad if you have those, an...
by Megan ODonnell 1K
Tue Oct 20, 2020 4:57 pm
Forum: Administrative Questions and Class Announcements
Topic: Where can I buy a webcam for a reasonable price?
Replies: 60
Views: 949

Re: Where can I buy a webcam for a reasonable price?

Amazon probably has the most variety and most reasonably priced. Plus if you are a prime member, shipping is very fast!
by Megan ODonnell 1K
Wed Oct 14, 2020 5:42 pm
Forum: Student Social/Study Group
Topic: Chemistry News
Replies: 77
Views: 50111

Re: Chemistry News

by Megan ODonnell 1K
Wed Oct 14, 2020 5:40 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 191
Views: 34673

Re: Final Jitters

I always just try not to wake up right before the test starts, but rather give myself enough time in the morning to have a routine to make food, brush my teeth, etc. I also find it helpful to do some last minute review or practice problems to get my brain warmed up. Hope this helps!
by Megan ODonnell 1K
Wed Oct 14, 2020 5:38 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student - Part II [ENDORSED]
Replies: 191
Views: 14511

Re: Advice from a Medical Student - Part II [ENDORSED]

Thank you so much for posting this! I love hearing about your experience as a medical student as I hope to become one eventually.
by Megan ODonnell 1K
Wed Oct 14, 2020 5:34 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8252
Views: 1445024

Re: Post All Chemistry Jokes Here

Don't trust atoms, they make up everything.
by Megan ODonnell 1K
Sun Oct 11, 2020 4:11 pm
Forum: Administrative Questions and Class Announcements
Topic: How to find my posts
Replies: 78
Views: 49127

Re: How to find my posts

I would search for the subject of your post when on the main page. Your question should pop up.
by Megan ODonnell 1K
Sun Oct 11, 2020 4:09 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 156
Views: 105677

Re: Reading the textbook [ENDORSED]

I find it helpful, especially when learning the different equations, constants, and their applications. If you don't like doing the readings, though, there are multiple other ways in which you can learn the material
by Megan ODonnell 1K
Sun Oct 11, 2020 4:08 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 226
Views: 116463

Re: Advice from a Medical Student [ENDORSED]

Thank you so much for this post! As a pre-med student I find this very helpful.
by Megan ODonnell 1K
Sun Oct 11, 2020 4:07 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 291
Views: 136553

Re: Saying Thank You to Dr. Lavelle

Dr. Lavelle, Thank you so much for all of the work you have put into providing resources for this course, despite the difficulty during COVID-19 right now. I was initially anxious about taking this course since the lectures have so many people and the sheer size of the course made learning seem so d...
by Megan ODonnell 1K
Sun Oct 11, 2020 4:03 pm
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 205
Views: 141596

Re: Rusty on High School Chem [ENDORSED]

I would say that reading the readings and staying on top of the practice problems are especially helpful to me. I took AP chem last year and was so scared that I wouldn't be able to stay on top of the work and succeed in the class, but as long as you stay on top of the work and study an ample amount...

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