CHEMISTRY COMMUNITY

Julianne Seog 3K

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?

Julianne Seog 3K

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?

Julianne Seog 3K

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...

Julianne Seog 3K

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?

Julianne Seog 3K

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?

Julianne Seog 3K

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?

Julianne Seog 3K

Why did the bear dissolve in water?
Because it was a polar bear!

Julianne Seog 3K

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?

Julianne Seog 3K

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?

Julianne Seog 3K

Helium walks into a bar,
The bar tender says "We don't serve noble gasses in here."
Helium doesn't react.

Julianne Seog 3K

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?

Julianne Seog 3K

What element is a girl's future best friend?
Carbon

Julianne Seog 3K

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?

Julianne Seog 3K

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

O^2-

Julianne Seog 3K

Did you know that you can cool yourself to -273.15˚C and still be....0K?

Julianne Seog 3K

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?

Julianne Seog 3K

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?

Julianne Seog 3K

If a King farts.... is it a Noble gas?

Julianne Seog 3K

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?

Julianne Seog 3K

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...

Julianne Seog 3K

Why did the noble gas cry?

Because all his friends Argon.

Julianne Seog 3K

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...

Julianne Seog 3K

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!!)

Julianne Seog 3K

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

CHEMISTRY COMMUNITY

Search found 24 matches

Common names on final

Iso / Neo when to use

Determining if a molecule is a nucleophile

exergonic/exothermic

When B and C is significantly larger than A

function of a salt bridge

Re: Post All Chemistry Jokes Here

question on U=q+w equation

bomb calorimeter mechanism

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Energy of the system during expansion [ENDORSED]

Re: Post All Chemistry Jokes Here

pressure change and the effect on K

Re: Post All Chemistry Jokes Here

Re: Post All Chemistry Jokes Here

Molecular orbitals

hybridization??

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resonance structures ?

wavefunction, psi, and orbitals [ENDORSED]

Re: Post All Chemistry Jokes Here

where to post jokes

Re: CHEM JOKES

Re: Chemistry Jokes