-Why isn't energy made of atoms? It doesn't matter
-Lose an electron? You should really keep a better ion them next time
-What does an anatomist give you when he's mad? A scowl-pal
Search found 11 matches
- Sat Mar 12, 2016 10:19 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3649215
- Sat Mar 12, 2016 10:12 pm
- Forum: *Cycloalkanes
- Topic: Winter Final 2012 Question 6B
- Replies: 3
- Views: 924
Re: Winter Final 2012 Question 6B
You know it is neopentyl because it has 3 carbons branching off of from one carbon (giving it the neo) and there are a total of 5 carbons in the substituent (making it pentyl). In other problems it looks like a cross but it an also be drawn like this.
- Sat Mar 12, 2016 10:04 pm
- Forum: *Alkenes
- Topic: Homework problem Chapter 2 Question 40
- Replies: 2
- Views: 706
Re: Homework problem Chapter 2 Question 40
If you draw it out, on one side of the double bond it has a carbon going each way, which makes it impossible to choose cis or trans because neither carbon has a priority.
- Sat Mar 12, 2016 6:55 pm
- Forum: *Carboxylic Acids
- Topic: Winter 2015 #9B
- Replies: 1
- Views: 1374
Winter 2015 #9B
For question Winter 2015 #9B (pg. 235 in the course reader), could anyone explain why Fructose (1,3,4,5,6-pentahydroxy-2-hexanone) and 3-hydropentanoic acid have OHs coming off of the carbon chain, as I thought that anything with an OH (unless it was an end of a chain) was an alcohol. It may have to...
- Sat Mar 12, 2016 6:43 pm
- Forum: *Alkenes
- Topic: Nomenclature of Alkenes with Functional Groups
- Replies: 1
- Views: 501
Re: Nomenclature of Alkenes with Functional Groups
You can't have a double bond starting at the second C (which means it's between 2 and 3) and have a ketone on the third because there would be 5 bonds coming off of the 3rd carbon (2 from the second carbon, 2 to the oxygen atom for the ketone, and 1 to the fourth C to keep the chain going). However,...
- Sat Mar 12, 2016 6:34 pm
- Forum: *Cycloalkanes
- Topic: 2015 Final #9A
- Replies: 1
- Views: 494
Re: 2015 Final #9A
Yes, in alcohols the OH always must come off of the main chain.
- Sat Mar 12, 2016 6:27 pm
- Forum: *Cycloalkanes
- Topic: 2012 Final Q6B
- Replies: 2
- Views: 677
Re: 2012 Final Q6B
Yes me and my colleague (@daniel23) just went though this compound and yes we concur that the IUPAC name is 1-(methylethyl)-3-(2,2-dimethylpropyl)-cyclohexane. Just make sure not to write the dashes between 2 names (like methyl-ethyl or dimethyl-propyl). My TA made it a point to tell us about that a...
- Sat Mar 12, 2016 6:09 pm
- Forum: *Alkanes
- Topic: Question on Alphabetizing Substituents
- Replies: 1
- Views: 415
Re: Question on Alphabetizing Substituents
I saw that and was wondering the same thing, I'm pretty sure that yes it should be 3-ethyl-2,2,4-trimethylhexane because even though the "tri" doesn't count towards the alphabetizing "ethyl" should still be before the "methyl." Must just be a typo or something.
- Sat Mar 12, 2016 6:01 pm
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: Drawing hydrogens
- Replies: 2
- Views: 628
Re: Drawing hydrogens
Because they don't take too much time I would be safe and just draw them in, as drawing them also helps you see if there are any interactions if there are any substituents.
- Wed Jan 20, 2016 2:08 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Changing the energy of a system
- Replies: 4
- Views: 872
Re: Changing the energy of a system
In simpler terms, the energy in open systems can be changed by all ways (adding/removing substance, heating/cooling, and doing work) while closed systems can only do the last two ways (heating/cooling and doing work). Hope this helps!
- Wed Jan 20, 2016 2:05 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Changing the energy of a system
- Replies: 4
- Views: 872
Re: Changing the energy of a system
I think the first response read the question wrong, I believe the answer is yes. The ways that you can change the energy for a closed system (Heating/cooling and doing work on the system) can be used on an open system as well, HOWEVER the way that the course reader says to change an open system (add...