Search found 11 matches

by jbcarton
Sat Mar 12, 2016 10:19 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7658
Views: 1035267

Re: Chemistry Jokes

-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
by jbcarton
Sat Mar 12, 2016 10:12 pm
Forum: *Cycloalkanes
Topic: Winter Final 2012 Question 6B
Replies: 3
Views: 587

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.
by jbcarton
Sat Mar 12, 2016 10:04 pm
Forum: *Alkenes
Topic: Homework problem Chapter 2 Question 40
Replies: 2
Views: 386

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.
by jbcarton
Sat Mar 12, 2016 6:55 pm
Forum: *Carboxylic Acids
Topic: Winter 2015 #9B
Replies: 1
Views: 631

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...
by jbcarton
Sat Mar 12, 2016 6:43 pm
Forum: *Alkenes
Topic: Nomenclature of Alkenes with Functional Groups
Replies: 1
Views: 312

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,...
by jbcarton
Sat Mar 12, 2016 6:34 pm
Forum: *Cycloalkanes
Topic: 2015 Final #9A
Replies: 1
Views: 269

Re: 2015 Final #9A

Yes, in alcohols the OH always must come off of the main chain.
by jbcarton
Sat Mar 12, 2016 6:27 pm
Forum: *Cycloalkanes
Topic: 2012 Final Q6B
Replies: 2
Views: 354

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...
by jbcarton
Sat Mar 12, 2016 6:09 pm
Forum: *Alkanes
Topic: Question on Alphabetizing Substituents
Replies: 1
Views: 224

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.
by jbcarton
Sat Mar 12, 2016 6:01 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Drawing hydrogens
Replies: 2
Views: 351

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.
by jbcarton
Wed Jan 20, 2016 2:08 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Changing the energy of a system
Replies: 4
Views: 503

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!
by jbcarton
Wed Jan 20, 2016 2:05 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Changing the energy of a system
Replies: 4
Views: 503

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...

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