Search found 57 matches
- Sun Dec 08, 2019 11:58 pm
- Forum: General Science Questions
- Topic: 50 post grade
- Replies: 25
- Views: 1870
Re: 50 post grade
It probably depends on your TA. I have heard that some TA's just look to see if you have done 50 posts by the end of week 10.
Re: -ate
You add -ate to a negatively charged molecule/anions in which you would use their Latin name (ex. Ferrate, Cuprate,etc). You don't need to change anything for a positively charged molecule.
- Sun Dec 08, 2019 11:54 pm
- Forum: Student Social/Study Group
- Topic: most stable
- Replies: 6
- Views: 585
Re: most stable
The most stable Lewis Structures are the ones that have a formal charge of 0
- Sun Dec 08, 2019 11:53 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Nitro vs Nitrito
- Replies: 6
- Views: 521
Re: Nitro vs Nitrito
Nitrito will either be written as ONO or NO2 with the O atom underlined. Nitro will be written as NO2 with N underlined.
- Sun Dec 08, 2019 11:47 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: AXE formula
- Replies: 7
- Views: 551
Re: AXE formula
A represents the central atom, X represents the number of atoms bonded to the central atom and E represents the number of lone pairs on the central atom.
- Sun Dec 08, 2019 11:44 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: bent v. angular
- Replies: 27
- Views: 1522
Re: bent v. angular
Bent and angular are interchangeable. Whichever term you prefer, you may use.
- Sun Dec 08, 2019 11:42 pm
- Forum: Administrative Questions and Class Announcements
- Topic: curve
- Replies: 8
- Views: 662
Re: curve
In the syllabus it states that "Only at the end of the class when the class average score (out of 500 points) is known are final grades assigned. This class does not use a curve."
- Mon Dec 02, 2019 9:29 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Grades
- Replies: 15
- Views: 1064
Re: Grades
Does anyone know how many points is equivalent to a C, C+, B-, B, B+, and so on?
- Sun Dec 01, 2019 11:45 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Grades
- Replies: 15
- Views: 1064
Re: Grades
Yes, you need at 250 in order to pass with a C-.
- Sun Dec 01, 2019 11:44 pm
- Forum: Student Social/Study Group
- Topic: Studying Videos
- Replies: 3
- Views: 245
Re: Studying Videos
I agree! Organic Chemistry Tutor is very helpful.
- Sun Dec 01, 2019 11:33 pm
- Forum: General Science Questions
- Topic: Bruincasts
- Replies: 9
- Views: 781
Re: Bruincasts
Lavelle doesn't bruincast his lectures. Your best bet is rewatching his audio-visual topics on the class website. Or you may read the textbook if you don't understand certain topics.
- Sun Dec 01, 2019 11:30 pm
- Forum: General Science Questions
- Topic: Friday Lecture Week 10
- Replies: 3
- Views: 309
Re: Friday Lecture Week 10
Our last lecture will be on Wednesday and Friday will most likely be review.
- Sun Dec 01, 2019 11:19 pm
- Forum: Lewis Acids & Bases
- Topic: Homework
- Replies: 4
- Views: 297
Re: Homework
Yes, we turn in homework for week 9 and 10 if you didn't have discussion last week. Or if you had discussion and did not turn in week 9 homework then, you can do so this week.
- Mon Nov 25, 2019 11:59 pm
- Forum: Sigma & Pi Bonds
- Topic: sigma and pi bonds
- Replies: 27
- Views: 1687
Re: sigma and pi bonds
Single bond = 1 sigma bond
Double Bond = 1 sigma bond, 1 pi bond
Triple Bond = 1 sigma bond, 2 pi bonds
Double Bond = 1 sigma bond, 1 pi bond
Triple Bond = 1 sigma bond, 2 pi bonds
- Mon Nov 25, 2019 11:58 pm
- Forum: Student Social/Study Group
- Topic: Test 2 and Final
- Replies: 18
- Views: 936
Re: Test 2 and Final
I'm assuming we will get back test 2 during week 10 discussion and the final is cumulative! I have a feeling there will be more emphasis on the new material that wasn't covered in the midterm.
- Mon Nov 25, 2019 11:45 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Attach Pictures
- Replies: 3
- Views: 383
Re: Attach Pictures
You could also drop the picture into the text box itself. It won't show up at first but when you press preview you could see if your picture is there.
- Mon Nov 25, 2019 11:37 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Online Textbook
- Replies: 6
- Views: 381
Re: Online Textbook
There should be a code that came with the book you purchased. However, if you can't access it and didn't exchange the Sapling access code for a SaplingPlus access code a few weeks ago, I would recommend taking pictures of the physical copy of the book or scan it but that's a bit of work :(
- Mon Nov 25, 2019 11:31 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Seesaw Shape
- Replies: 12
- Views: 653
Re: Seesaw Shape
It would be easier to just memorize them. The seesaw shape would be <90 and <120 degrees
- Sun Nov 17, 2019 11:00 pm
- Forum: Trends in The Periodic Table
- Topic: electron affinity
- Replies: 7
- Views: 698
Re: electron affinity
Electron affinity increases as you goes up a period and across a period (from left to right).
- Sun Nov 17, 2019 10:55 pm
- Forum: Student Social/Study Group
- Topic: Class Grading
- Replies: 44
- Views: 3744
Re: Class Grading
Does anyone know how many points a B- would be per se if 250/500 is a C-?
- Sun Nov 17, 2019 10:47 pm
- Forum: Student Social/Study Group
- Topic: Class Grading
- Replies: 44
- Views: 3744
Re: Class Grading
I think you only need 250/500 to pass the class with a C-
- Sun Nov 17, 2019 7:59 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: types of bonds
- Replies: 14
- Views: 1228
Re: types of bonds
Yea, exactly!
Single bond = 1 sigma bond
Double Bond = 1 sigma bond, 1 pi bond
Triple Bond = 1 sigma bond, 2 pi bonds
Single bond = 1 sigma bond
Double Bond = 1 sigma bond, 1 pi bond
Triple Bond = 1 sigma bond, 2 pi bonds
- Sun Nov 17, 2019 5:35 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Do we have to memorize the names of shapes and/or the bond angles?
- Replies: 7
- Views: 521
Re: Do we have to memorize the names of shapes and/or the bond angles?
I believe that it would be good to memorize the bond angles and molecular shapes for the test.
- Sun Nov 10, 2019 9:45 pm
- Forum: Electronegativity
- Topic: Periodic Trend
- Replies: 13
- Views: 816
Re: Periodic Trend
Electronegativity increases up a period and across a period from left to right!
- Sun Nov 10, 2019 9:07 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: Test 2
- Replies: 6
- Views: 381
Re: Test 2
I believe that test 2 will cover everything after the midterm
- Sun Nov 10, 2019 9:06 pm
- Forum: Student Social/Study Group
- Topic: chem 14b + cehm14bl
- Replies: 9
- Views: 725
Re: chem 14b + cehm14bl
I am also not sure which is best to take together. However, I have met people that say they've taken chem14b and chem 14bl together or they have just taken chem14bl by itself.
- Sun Nov 10, 2019 9:03 pm
- Forum: Electronegativity
- Topic: memorizing tables
- Replies: 9
- Views: 344
Re: memorizing tables
I don't believe you need to memorize the electronegativity numbers just the electronegativity trend which increases across and up a period.
- Sun Nov 10, 2019 8:53 pm
- Forum: Bond Lengths & Energies
- Topic: Week 7 Homework
- Replies: 15
- Views: 867
Re: Week 7 Homework
I believe you could still turn in homework from the chemicals bonds section for week 7
- Sun Nov 03, 2019 10:46 pm
- Forum: Dipole Moments
- Topic: Dipole, midterm?
- Replies: 7
- Views: 506
Re: Dipole, midterm?
From what I can remember I think everything up until the end of last week including dipole moments will be on the midterm. Feel free to correct me because I might have heard wrong :)
- Sun Nov 03, 2019 10:41 pm
- Forum: Administrative Questions and Class Announcements
- Topic: slides
- Replies: 4
- Views: 376
Re: slides
Sadly, no :((( I believe it would be very beneficial if he did.
- Sun Nov 03, 2019 10:37 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterms
- Replies: 6
- Views: 436
Re: Midterms
Yes, thankfully we don't have two midterms! :) Just test 2 and a final.
- Sun Nov 03, 2019 10:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Accessing the E book urgent
- Replies: 1
- Views: 118
Re: Accessing the E book urgent
I also saw the email and am wondering about this too. However, I can still access the ebook but I haven't switched to sapling plus.
- Sun Nov 03, 2019 10:17 pm
- Forum: *Black Body Radiation
- Topic: Midterm
- Replies: 3
- Views: 466
Re: Midterm
I think we don't need to worry about it for the first midterm!
- Sun Oct 27, 2019 7:01 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Thanksgiving
- Replies: 3
- Views: 148
Re: Thanksgiving
I believe we do have lecture on Nov. 27 and discussion section as well if you have one on Wednesday.
- Sun Oct 27, 2019 4:40 pm
- Forum: Student Social/Study Group
- Topic: Study Tips
- Replies: 58
- Views: 4546
Re: Study Tips
You may also go to the test bank and see what Lavelle's previous tests consisted of so you have a general idea of what our's may possibly look like :)
- Sun Oct 27, 2019 4:36 pm
- Forum: Student Social/Study Group
- Topic: Miderm Review
- Replies: 10
- Views: 652
Re: Miderm Review
Did you buy the bundle? I believe if you bought the chemistry bundle in the beginning of the quarter I believe you would be able to access the course. If not, I assume you would have to pay $64 :(
- Sun Oct 27, 2019 4:29 pm
- Forum: Properties of Light
- Topic: p=mv
- Replies: 4
- Views: 159
Re: p=mv
Linear momentum is expressed as p=mass*velocity. Thus, the SI units should be kg*m/s
- Sun Oct 27, 2019 2:19 pm
- Forum: Student Social/Study Group
- Topic: Miderm Review
- Replies: 10
- Views: 652
Re: Miderm Review
There should be some practice assignments on Sapling Learning, other than that I am not sure of other resources.
- Sun Oct 20, 2019 9:47 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Posting Image
- Replies: 3
- Views: 296
- Sun Oct 20, 2019 9:40 pm
- Forum: General Science Questions
- Topic: Test #1
- Replies: 6
- Views: 326
Re: Test #1
I believe you meant percent yield.
Percent Yield = (Actual Yield / Theoretical Yield) * 100%
Percent Yield = (Actual Yield / Theoretical Yield) * 100%
- Sat Oct 19, 2019 11:18 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: 1D.19
- Replies: 6
- Views: 198
Re: 1D.19
a) Three orbitals
b) Five orbitals
c) One orbital
d) Seven orbitals
Try to make note of the number of orbitals in each type of subshell...
s: 1 orbital
p: 3 orbitals
d: 5 orbitals
f: 7 orbitals
b) Five orbitals
c) One orbital
d) Seven orbitals
Try to make note of the number of orbitals in each type of subshell...
s: 1 orbital
p: 3 orbitals
d: 5 orbitals
f: 7 orbitals
- Sat Oct 19, 2019 11:07 pm
- Forum: Properties of Light
- Topic: Homework due Next Week
- Replies: 9
- Views: 368
Re: Homework due Next Week
Yes! The homework for week 4 still deals with "The Quantum World" section so we would just submit a different set of 5 problems this week.
- Sat Oct 19, 2019 6:43 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Posting Image
- Replies: 3
- Views: 296
Re: Posting Image
I believe there are two ways you could do this. First, try to drop/add the image into the text box directly and then hit preview in order to see if the image appears in your post. Or you could look below the submit button, and there should be two tabs labeled "Options" and "Attachment...
- Sat Oct 19, 2019 6:31 pm
- Forum: General Science Questions
- Topic: Midterm
- Replies: 3
- Views: 231
Re: Midterm
I believe you could go to TA or Professor Office hours for any questions, comments, or concerns you may have leading up to the midterm. According to the syllabus, there should be many exam review sessions, workshops, peer learning sessions, and step-up sessions every week.
- Sat Oct 12, 2019 11:50 pm
- Forum: Empirical & Molecular Formulas
- Topic: Nomenclature
- Replies: 11
- Views: 2293
Re: Nomenclature
I agree with the previous person. Maybe in the future we will need to know how to write the molecular formula from it's name and vice versa but I don't think it is something to worry about as of right now.
- Sat Oct 12, 2019 7:48 pm
- Forum: DeBroglie Equation
- Topic: Chemistry Community Weekly Points
- Replies: 3
- Views: 207
Re: Chemistry Community Weekly Points
I believe that they are due Sunday before 11:59pm. If anything try to get your 5 posts in before Sunday so you don't have to worry about it! Hope this helps :)
- Sat Oct 12, 2019 7:46 pm
- Forum: DeBroglie Equation
- Topic: Thanksgiving Week
- Replies: 1
- Views: 106
Re: Thanksgiving Week
I believe that we'll have class the Wednesday before Thanksgiving because I actually added my classes I think from MyUCLA to my calendar.
- Sat Oct 12, 2019 6:24 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3618409
Re: Post All Chemistry Jokes Here
Q: What two elements do sheep belt when happy?
A: BaH!!
A: BaH!!
- Sat Oct 12, 2019 2:13 pm
- Forum: Properties of Light
- Topic: Textbook numbering
- Replies: 2
- Views: 114
Re: Textbook numbering
I think for the online version you would need to find the table of contents on the left hand side (underneath the home button) and find the sections that he assigned. For instance look for Focus 1, then you would read Topic 1A Investigating Atoms and all the way at the bottom you would find the home...
- Sat Oct 12, 2019 2:01 pm
- Forum: Photoelectric Effect
- Topic: Energy in Photoelectric Effect
- Replies: 5
- Views: 188
Re: Energy in Photoelectric Effect
I think that the threshold energy has to always be greater than or equal to the rest energy in order for the electrons to be emitted.
- Fri Oct 04, 2019 10:54 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Study Tips/Schedule
- Replies: 4
- Views: 236
Re: Study Tips/Schedule
I would suggest to view the modules again, look over lecture notes, do more practice problems on the concepts that you don't really understand (although that sounds a bit tedious it could turn out to be beneficial), and maybe look for outside sources if needed. For instance, you could watch videos o...
- Fri Oct 04, 2019 7:41 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3618409
Re: Post All Chemistry Jokes Here
oxygen+sodium+sodium = O Na Na whats my name...
- Fri Oct 04, 2019 7:36 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Homework Grading
- Replies: 7
- Views: 383
Re: Homework Grading
I'm not sure if you will be penalized. However, I think it might be good to write the units throughout the whole problem so that your TA will know how you went from say grams to atoms or whatever the problem asks you to do.
- Fri Oct 04, 2019 7:27 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Homework Grading
- Replies: 7
- Views: 383
Re: Homework Grading
I think that if you keep in mind the sig fig rules and how to properly decipher how many sig figs are needed in the final answer, you should be able to come up with the correct number. You could also look at the solutions manual so that you know exactly how much you need to round your answer in the ...
- Fri Oct 04, 2019 7:24 pm
- Forum: Empirical & Molecular Formulas
- Topic: Chemical Formulas
- Replies: 3
- Views: 301
Re: Chemical Formulas
I believe so. You would write H20 not OH2 because the element with the positive oxidation number comes first or before the element with the negative oxidation number.
- Tue Oct 01, 2019 10:56 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: How to do E15
- Replies: 4
- Views: 249
Re: How to do E15
You are trying to find the molar mass of M so essentially what does M=? 1) The molar mass of (OH)2 is 34.02 g/mol 2)Molar mass of metal (M) = 74.10 g/mol - 34.02 g/mol = 40.08 g*mol^-1 When you look at the periodic table the molar mass matches the element Ca 3) Now find the molar mass of Calcium Sul...
- Tue Oct 01, 2019 8:16 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: How to access e textbook
- Replies: 4
- Views: 317
Re: How to access e textbook
You should have gotten an email with a link to access sapling learning. From there you need to create a new user ID if you don't have one already and then once you log in you will be able to see the chem course. To access the book look all the way to the right hand side and it should say eTextbook u...