Search found 21 matches
- Sat Mar 18, 2017 2:54 pm
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: Equatorial and axial bonds
- Replies: 4
- Views: 2119
Re: Equatorial and axial bonds
In the photo, which bond would be which on the carbon I labeled 3? How would I be able to tell that on a test?
- Sat Mar 18, 2017 2:33 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Saying Thank You to Dr. Lavelle
- Replies: 490
- Views: 633406
Re: Saying Thank You to Dr. Lavelle
Dear Dr. Lavelle, After a bad experience in AP Chem, I really thought I hated chemistry, and that I could never understand it. Then I had you as a professor for both chem 14A and 14B, and I must say when I first picked your class, I was scared that I would hate it. I didn't. Having you as my profess...
- Wed Mar 08, 2017 5:30 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 Winter 2017
- Replies: 183
- Views: 30089
Re: Quiz 3 Winter 2017
for #1, why do we need "iso" infant of propyl? wouldn't the 4- signify the branching? This is because "iso" identifies that there is 2 CH3's coming off of 1 CH (in all there is 3 carbons so prop). That is what CH(CH3)2 means so iso is used and it is connected to the 4th carbon a...
- Sun Mar 05, 2017 9:15 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3917088
- Sat Feb 25, 2017 11:10 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3917088
- Wed Feb 15, 2017 5:24 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Changes in both volume and temp [ENDORSED]
- Replies: 5
- Views: 1247
Re: Changes in both volume and temp [ENDORSED]
How would you be able to tell whether or not a reaction occurs at a constsnt temperature?
- Sat Feb 11, 2017 3:16 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Winter 2017
- Replies: 87
- Views: 21266
Re: Midterm Winter 2017
I am having trouble viewing the midterm review session. Is there any one else having this problem? It says the plugin is not supported when I try and watch it.
- Sat Feb 11, 2017 3:14 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: 2013 Midterm Q6B [ENDORSED]
- Replies: 1
- Views: 539
2013 Midterm Q6B [ENDORSED]
In the 2013 midterm Q6B, we are asked to determine when different quantities provide a criterion for assessing the spontaneity of a reaction. Why are we unable to tell whether the reaction is spontaneous or not using delta S but we can tell using delta S (total)?
- Wed Feb 01, 2017 6:05 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 1 Preparation Answers
- Replies: 130
- Views: 25834
Re: Quiz 1 Preparation Answers
Can anyone explain how they calculated the enthalpy of vaporization for question 4? deltaH sublimation = deltaH vaporization + deltaH fusion so by manipulating the equation to make deltaH vaporization = deltaH sublimation - deltaH fusion, you can then calculate the enthalpy of vaporization given th...
- Wed Feb 01, 2017 5:49 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3917088
- Fri Jan 13, 2017 11:21 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Random Enrollment Checks
- Replies: 9
- Views: 2038
Re: Random Enrollment Checks
How would these random enrollment checks be conducted? Would they take up lecture time?
- Sun Dec 04, 2016 12:27 am
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: bond order question [ENDORSED]
- Replies: 3
- Views: 902
Re: bond order question [ENDORSED]
What does it mean if something has a bond order of 2.5? Is it a shorter double bond?
- Fri Dec 02, 2016 4:13 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Charge of ligand
- Replies: 1
- Views: 760
Charge of ligand
On question Q5A from the 2015 final, it asks what the charge of the ligand called "corrin-DMB" is, and hints that this can be found by taking the formal charges of each coordinated Nitrogen. In the answer, it says that the top left Nitrogen has a formal charge of -1. How do you get that fo...
- Sat Nov 26, 2016 10:28 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3917088
Re: Post All Chemistry Jokes Here
If the Silver Surfer and Iron Man team up, they’d be alloys.
- Sat Nov 19, 2016 10:10 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3917088
Re: Post All Chemistry Jokes Here
If you're not part of the solution, you're part of the precipitate
- Sat Nov 12, 2016 11:13 pm
- Forum: Bond Lengths & Energies
- Topic: Bond length, 2012 Midterm Question 6B
- Replies: 3
- Views: 991
Re: Bond length, 2012 Midterm Question 6B
A better way to figure this out is by determining the bond order of each, rather than drawing out the lewis structures.
- Tue Nov 01, 2016 8:17 pm
- Forum: Bond Lengths & Energies
- Topic: Bond length, 2012 Midterm Question 6B
- Replies: 3
- Views: 991
Bond length, 2012 Midterm Question 6B
Using molecular orbital theory, list the following molecules from shortest bond length to the longest bond length.
B2^+, B2, B2^-, B2^2-
How would you tell which which would have to shortest or the longest length?
B2^+, B2, B2^-, B2^2-
How would you tell which which would have to shortest or the longest length?
- Wed Oct 26, 2016 6:09 pm
- Forum: Octet Exceptions
- Topic: Octet Exception
- Replies: 4
- Views: 1108
Re: Octet Exception
So would atoms in the 3rd period fill their d orbital or go to a 4p orbital?
- Wed Oct 19, 2016 11:33 am
- Forum: Ionic & Covalent Bonds
- Topic: Electronegativity and Bond Types
- Replies: 2
- Views: 689
Electronegativity and Bond Types
Would we have to memorize the electronegativity values in order to tell which is an ionic or a covalent bond?
- Sun Oct 09, 2016 10:09 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Uncertainty
- Replies: 11
- Views: 2885
Re: Uncertainty
So if the equation does not use a +/-, then the uncertainty of speed is the value given, but if it does include a +/-, the uncertainty is the value doubled? I thought that the value always meant that it the uncertainty was that value above or below? For example, even if the question had not said +/-...
- Sun Oct 02, 2016 9:28 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Peer Facilitated Learning Sessions
- Replies: 32
- Views: 13440
Re: Peer Facilitated Learning Sessions
In the chem refreshers, each person who was holding a session was focusing on a specific topic. Will these sessions be the same way? Or would they just answer the questions each student brings to the learning sessions?