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Chemistry Community
Search found 17 matches
- Sat Mar 18, 2017 8:12 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3891420
- Sat Mar 18, 2017 2:19 pm
- Forum: *Cycloalkanes
- Topic: Root naming
- Replies: 2
- Views: 1416
Re: Root naming
Hope this question makes sense.. These are two examples taken from Problem Set 2 (E )-3-bromo-2,4-dimethylhepta-2,4-diene (Z)-4-ethyl-6-methylhept-3-enal Why is one hepta- and one hept-? What are the rules when it comes to adding/dropping the -a? Can someone explain to me when to use trans and cis?
- Fri Mar 17, 2017 10:58 pm
- Forum: Student Social/Study Group
- Topic: De Neve Study Group
- Replies: 35
- Views: 4841
Re: De Neve Study Group
paulapedrani wrote:Does anyone in De Neve want to make a study group? It's only been two days and I already feel behind.
What about a Study Group tomorrow?
- Fri Mar 17, 2017 10:53 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Quiz 2 question
- Replies: 3
- Views: 745
Re: Quiz 2 question
Thank you for this I also had this question on my quiz. One more thing, on question four where would the deltaG rxn and deltaG transition go for an endergonic and exergonic reaction?
- Fri Mar 17, 2017 10:44 pm
- Forum: *Alkenes
- Topic: Cyclohexene example in course reader [ENDORSED]
- Replies: 1
- Views: 1339
Re: Cyclohexene example in course reader [ENDORSED]
Because of the double bond. We would have to prioritize the double bond and cross it. You would start with the Chloro right next to the bond as 1 and continue counting from there.
- Fri Mar 17, 2017 2:29 pm
- Forum: General Science Questions
- Topic: Final
- Replies: 9
- Views: 2285
Re: Final
Homework questions will be on the final, and there might be a question from chemistry community?? not sure about that one
- Fri Mar 17, 2017 10:07 am
- Forum: Administrative Questions and Class Announcements
- Topic: Saying Thank You to Dr. Lavelle
- Replies: 490
- Views: 622178
Re: Saying Thank You to Dr. Lavelle
Thank You Dr. Lavelle for your enthusiasm for teaching. Thank you for two great quarters of chemistry. Everyone appreciates all of the resources you have provided for us. For Chemistry Community, office hours, UA sessions, and review sessions. Thank you for everything that you have done for us this ...
- Fri Mar 17, 2017 9:58 am
- Forum: *Calculations Using ΔG° = -RT ln K
- Topic: Memorizing Relative Energies
- Replies: 1
- Views: 1360
Re: Memorizing Relative Energies
I think they'll be given. If not just memorize the lowest and highest relative energies.
- Thu Mar 16, 2017 8:34 pm
- Forum: Balancing Redox Reactions
- Topic: 2013 Final Q3 Part A
- Replies: 1
- Views: 446
Re: 2013 Final Q3 Part A
For the cathode and anode make sure that they are in the correct state. So for cathode make sure it is written as a reduction. For the anode make sure its being oxidized. And if you have to switch the products and the reactions to get to the right state then change the sign on your voltage and add u...
- Thu Mar 16, 2017 6:00 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Thermodynamically/ kinetically stable
- Replies: 2
- Views: 627
Re: Thermodynamically/ kinetically stable
http://chemistry.stackexchange.com/ques ... -stability
This helped me understand it. Hope it helps!
This helped me understand it. Hope it helps!
- Thu Mar 16, 2017 5:56 pm
- Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
- Topic: How to tell whether a molecule is eclipsed or staggered by looking at the 2D repersentation?
- Replies: 4
- Views: 5597
Re: How to tell whether a molecule is eclipsed or staggered by looking at the 2D repersentation?
To add on to this, you can tell mostly because the Newman projection gives you the 2-D image looking along the C-C bond - think of it as facing C1 head-on so that C2 is perfectly behind it. Staggered and eclipsed just refer to the positions of the hydrogens in this radial image - staggered means th...
- Thu Mar 02, 2017 8:53 pm
- Forum: *Alkanes
- Topic: Naming [ENDORSED]
- Replies: 93
- Views: 17015
Re: Naming [ENDORSED]
Caleb Lim 2M wrote:How do we know in what order we should put the numbers? (because we can start counting from either side of the molecule)
You number the substituents based off the lowest number/location on the parent chain.
- Sun Jan 29, 2017 5:22 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 1 Preparation Answers
- Replies: 130
- Views: 25810
Re: Quiz 1 Preparation Answers
Hue_Vo_1D wrote:Hue_Vo_1D wrote:Diego Cortez 2J wrote:I balanced the equation, but I'm still confused on how to get the moles.
Use stoichiometry.
2220 kJ/1 mol=2580 kJ/X mol
Solve for X
Thanks
- Sun Jan 29, 2017 5:08 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 1 Preparation Answers
- Replies: 130
- Views: 25810
Re: Quiz 1 Preparation Answers
Can someone show me the setup for #6? Please and thank you! -Write out the equation for the combustion of propane and make sure to balance the eqn. -From the given standard enthalpy of combustion (kJ/mol), figure out how many moles of propane is burned in order to release 2580. kJ of heat.(use stoi...
- Sun Jan 29, 2017 4:17 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 1 Preparation Answers
- Replies: 130
- Views: 25810
Re: Quiz 1 Preparation Answers
Can someone show me the setup for #6? Please and thank you!
- Sun Oct 23, 2016 8:06 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm
- Replies: 2
- Views: 735
Re: Midterm
Wednesday, November 2, 6-8 PM
- Fri Sep 30, 2016 8:55 pm
- Forum: Student Social/Study Group
- Topic: De Neve Study Group
- Replies: 35
- Views: 4841
Re: De Neve Study Group
Is anyone actually going to meet? If so please post the time on here! I live in Birch and would really like to study with others.