Search found 24 matches

by Julianne Seog 3K
Wed Mar 15, 2017 3:15 pm
Forum: Administrative Questions and Class Announcements
Topic: Common names on final
Replies: 3
Views: 376

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?
by Julianne Seog 3K
Fri Mar 10, 2017 4:48 am
Forum: *Alkanes
Topic: Iso / Neo when to use
Replies: 3
Views: 416

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?
by Julianne Seog 3K
Tue Mar 07, 2017 4:24 pm
Forum: *Electrophiles
Topic: Determining if a molecule is a nucleophile
Replies: 2
Views: 572

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...
by Julianne Seog 3K
Tue Mar 07, 2017 4:20 pm
Forum: *Organic Reaction Mechanisms in General
Topic: exergonic/exothermic
Replies: 2
Views: 318

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?
by Julianne Seog 3K
Thu Feb 23, 2017 10:00 pm
Forum: General Rate Laws
Topic: When B and C is significantly larger than A
Replies: 3
Views: 374

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?
by Julianne Seog 3K
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: 431

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?
by Julianne Seog 3K
Sun Feb 12, 2017 9:34 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1019214

Re: Post All Chemistry Jokes Here

Why did the bear dissolve in water?
Because it was a polar bear!
by Julianne Seog 3K
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: 365

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?
by Julianne Seog 3K
Sun Jan 29, 2017 1:47 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: bomb calorimeter mechanism
Replies: 1
Views: 403

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?
by Julianne Seog 3K
Mon Jan 23, 2017 3:05 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1019214

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.
by Julianne Seog 3K
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: 306

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?
by Julianne Seog 3K
Thu Dec 01, 2016 1:59 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1019214

Re: Post All Chemistry Jokes Here

What element is a girl's future best friend?
Carbon
by Julianne Seog 3K
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: 360

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?
by Julianne Seog 3K
Wed Nov 16, 2016 9:18 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1019214

Re: Post All Chemistry Jokes Here

How do you tell a coordination hugs and kisses in a letter?

O2-
by Julianne Seog 3K
Wed Nov 16, 2016 2:45 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1019214

Re: Post All Chemistry Jokes Here

Did you know that you can cool yourself to -273.15˚C and still be....0K?
by Julianne Seog 3K
Thu Nov 10, 2016 4:31 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Molecular orbitals
Replies: 1
Views: 204

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?
by Julianne Seog 3K
Sat Oct 29, 2016 10:34 pm
Forum: Hybridization
Topic: hybridization??
Replies: 1
Views: 228

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?
by Julianne Seog 3K
Sun Oct 23, 2016 10:50 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1019214

Re: Post All Chemistry Jokes Here

If a King farts.... is it a Noble gas?
by Julianne Seog 3K
Sat Oct 15, 2016 3:28 pm
Forum: Resonance Structures
Topic: resonance structures ?
Replies: 1
Views: 374

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?
by Julianne Seog 3K
Sun Oct 09, 2016 3:11 am
Forum: *Shrodinger Equation
Topic: wavefunction, psi, and orbitals [ENDORSED]
Replies: 1
Views: 636

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...
by Julianne Seog 3K
Sun Oct 09, 2016 3:01 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1019214

Re: Post All Chemistry Jokes Here

Why did the noble gas cry?

Because all his friends Argon.
by Julianne Seog 3K
Tue Oct 04, 2016 2:32 am
Forum: Administrative Questions and Class Announcements
Topic: where to post jokes
Replies: 3
Views: 471

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...
by Julianne Seog 3K
Sun Oct 02, 2016 4:59 pm
Forum: Student Social/Study Group
Topic: CHEM JOKES
Replies: 29
Views: 3498

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!!)
by Julianne Seog 3K
Fri Sep 30, 2016 12:58 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1019214

Re: Chemistry Jokes

What did elements from Group 7A say to Jennifer?
Halogen

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