Search found 24 matches
- Wed Mar 15, 2017 3:15 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Common names on final
- Replies: 3
- Views: 734
Common names on final
I remember Dr. Lavelle mentioning something in class that we only need to know IUPAC naming. Does that mean we do not need to know common names like Iso and Neo that are mentioned in the course reader for the final exam?
- Fri Mar 10, 2017 4:48 am
- Forum: *Alkanes
- Topic: Iso / Neo when to use
- Replies: 3
- Views: 830
Iso / Neo when to use
On page 96 of the course reader, the first diagram was labeled to be isopropyl-cyclopentane. why cant it just be named propyl cyclopentane? what determines the prefixes of iso(or neo) to be added-- is it just the shape of the substituent chain?
- Tue Mar 07, 2017 4:24 pm
- Forum: *Electrophiles
- Topic: Determining if a molecule is a nucleophile
- Replies: 4
- Views: 1534
Determining if a molecule is a nucleophile
I was looking through the course reader, and noticed that in the list of nucleophiles, the majority of molecules that are classified as nucleophiles were overall a negative charge and positive for electrophiles. Are there any molecules that have a negative charge that is not and nucleophile/ positiv...
- Tue Mar 07, 2017 4:20 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: exergonic/exothermic
- Replies: 2
- Views: 792
exergonic/exothermic
What is the difference between exergonic and exothermic reactions? Is the same concept but just a different name because it describes a different type of reaction?
- Thu Feb 23, 2017 10:00 pm
- Forum: General Rate Laws
- Topic: When B and C is significantly larger than A
- Replies: 3
- Views: 721
When B and C is significantly larger than A
In the course reader, it says if the concentration of B and C is significantly larger than A then the reaction rate depends only on A. How much is "significantly larger" so that this rule can apply?
- Tue Feb 14, 2017 2:38 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: function of a salt bridge
- Replies: 2
- Views: 1076
function of a salt bridge
I am still confused on how the salt bridge maintains the neutrality of the two solutions. What exactly does the salt bridge transfer, and from and to where does it transfer and it's effects?
- Sun Feb 12, 2017 9:34 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2966510
Re: Post All Chemistry Jokes Here
Why did the bear dissolve in water?
Because it was a polar bear!
Because it was a polar bear!
- Sun Jan 29, 2017 5:39 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: question on U=q+w equation
- Replies: 2
- Views: 690
question on U=q+w equation
in the course reader, it says that if the change in pressure is 0( meaning constant pressure),then the change in internal energy is equal to q+w. How would you calculate internal energy if the pressure wasnt constant while the system is getting compressed?
- Sun Jan 29, 2017 1:47 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: bomb calorimeter mechanism
- Replies: 1
- Views: 901
bomb calorimeter mechanism
I am confused on how the constant v bomb calorimeter works. So I understand that for constant pressure, a reaction is taken inside a cup of water, and then the change in temp of the water is used to calculate the change in heat of the reaction, but how does the constant v bomb calorimeter work?
- Mon Jan 23, 2017 3:05 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2966510
Re: Post All Chemistry Jokes Here
Helium walks into a bar,
The bar tender says "We don't serve noble gasses in here."
Helium doesn't react.
The bar tender says "We don't serve noble gasses in here."
Helium doesn't react.
- Fri Jan 20, 2017 9:23 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Energy of the system during expansion [ENDORSED]
- Replies: 2
- Views: 585
Energy of the system during expansion [ENDORSED]
In the course reader it says that the piston moves out the energy of the system decreases. Why does the energy decrease?? is it because the energy of the system is used to move the piston, therefore the energy leaving the system?
- Thu Dec 01, 2016 1:59 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2966510
Re: Post All Chemistry Jokes Here
What element is a girl's future best friend?
Carbon
Carbon
- Thu Dec 01, 2016 1:40 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: pressure change and the effect on K
- Replies: 2
- Views: 618
pressure change and the effect on K
In the course reader, it said that K does not change even if the pressure changes. Why is this true? Wouldnt changing pressure (for example decreasing the volume) affect the concentration and therefore the equilibrium constant?
- Wed Nov 16, 2016 9:18 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2966510
Re: Post All Chemistry Jokes Here
How do you tell a coordination hugs and kisses in a letter?
O2-
O2-
- Wed Nov 16, 2016 2:45 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2966510
Re: Post All Chemistry Jokes Here
Did you know that you can cool yourself to -273.15˚C and still be....0K?
- Thu Nov 10, 2016 4:31 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Molecular orbitals
- Replies: 1
- Views: 414
Molecular orbitals
Are Molecular orbitals different from when we bond with hybrid orbitals? What are their differences?
Also, when we draw MOs do we only utilize the valence electrons?
Also, when we draw MOs do we only utilize the valence electrons?
- Sat Oct 29, 2016 10:34 pm
- Forum: Hybridization
- Topic: hybridization??
- Replies: 1
- Views: 524
hybridization??
I can figure out what atom has which hybrid orbitals, but I dont understand why/when hybrid orbitals form. Do they always form when atoms bond? If not what is the criteria for forming hybrid orbitals?
- Sun Oct 23, 2016 10:50 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2966510
Re: Post All Chemistry Jokes Here
If a King farts.... is it a Noble gas?
- Sat Oct 15, 2016 3:28 pm
- Forum: Resonance Structures
- Topic: resonance structures ?
- Replies: 1
- Views: 621
resonance structures ?
I was wondering if there were certain requirements/characteristics that help determine if an ion had a resonance structure? so any ion with interchangeable bonds are all ions with resonance structures?
- Sun Oct 09, 2016 3:11 am
- Forum: *Shrodinger Equation
- Topic: wavefunction, psi, and orbitals [ENDORSED]
- Replies: 1
- Views: 1453
wavefunction, psi, and orbitals [ENDORSED]
I understand that psi is the wavefunction, and the psi^2 is the probability density. Is it only the psi^2 that determines the shape of the orbital, as it represents the likeliness of finding an electron in that area? If so, then what is the significance of just psi by itself? (sorry im confused on t...
- Sun Oct 09, 2016 3:01 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2966510
Re: Post All Chemistry Jokes Here
Why did the noble gas cry?
Because all his friends Argon.
Because all his friends Argon.
- Tue Oct 04, 2016 2:32 am
- Forum: Administrative Questions and Class Announcements
- Topic: where to post jokes
- Replies: 3
- Views: 781
where to post jokes
Hi, I posted a chem joke last friday but it disappeared, so i posted another time on a different thread, but that thread became locked and the admin said to post on the forum it linked us to. however, when I pressed on the link, it said I have no authority to access the forum. So i was wondering whe...
- Sun Oct 02, 2016 4:59 pm
- Forum: Student Social/Study Group
- Topic: CHEM JOKES
- Replies: 29
- Views: 6848
Re: CHEM JOKES
What did the elements in group 7A say to Jennifer?
Halogen
(I posted this on Friday but now i cant find my post so im posting it again just to make sure!!)
Halogen
(I posted this on Friday but now i cant find my post so im posting it again just to make sure!!)
- Fri Sep 30, 2016 12:58 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2966510
Re: Chemistry Jokes
What did elements from Group 7A say to Jennifer?
Halogen
Halogen