Search found 21 matches
- Mon Mar 13, 2017 4:55 pm
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: Stability and Breaking of Bonds
- Replies: 1
- Views: 617
Stability and Breaking of Bonds
So we have learned that cyclohexanes are the most stable forms of "cyclo-" molecules out there because of there bond angles being 109.5 so there is little strain on the bond angles themselves. Can someone describe to me a real-life example on how we may be able to break long chains of cycl...
- Tue Mar 07, 2017 6:51 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3051055
Re: Post All Chemistry Jokes Here
What did the bartender say when Oxygen, Hydrogen, Sulfur, Sodium, and Phosphorous walked into his bar?
OH SNaP!
OH SNaP!
- Thu Mar 02, 2017 10:28 am
- Forum: *Alkanes
- Topic: Alphabetical Naming Order After Lowest Carbon?
- Replies: 1
- Views: 611
Alphabetical Naming Order After Lowest Carbon?
I am I correct in that when naming based on the IUPAC scheme, we take priority of the lowest number C bonded to the hydrocarbon groups and then after that (if the molecule is identical forward and reverse) we utilize the alphabetical order of the alkanes (ethyl take priority over methyl)? Or does th...
- Thu Mar 02, 2017 10:26 am
- Forum: *Alkanes
- Topic: Naming with dimethyl groups
- Replies: 1
- Views: 501
Naming with dimethyl groups
Dr. Lavelle used the example of 4 ethyl-2,2-dimethyl hexane in-class yesterday and I was wondering in a hypothetical scenario if we had 1 ethyl group (bonded at the 4th carbon atom) and 2 methyl groups bonded to hexane: 1 methyl group bonded to the 2nd carbon atom and another at the 3rd, how would w...
- Tue Feb 21, 2017 9:18 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: Order of Reactions and its Units
- Replies: 1
- Views: 545
Order of Reactions and its Units
Can someone please describe to me how the units of each order of reaction differ, particular "k"'s units? Does it come from the derivation of the formula itself or is it dependent on the units of the concentration/pressure of the products and reactants in the equation? Any input would help...
- Thu Feb 16, 2017 5:38 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3051055
Re: Post All Chemistry Jokes Here
What fruit contains Barium and double Sodium?
BaNaNa's! :D
BaNaNa's! :D
- Mon Feb 06, 2017 7:58 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3051055
Re: Post All Chemistry Jokes Here
What do you get when you cross two hydrogen buffalo and a oxygen buffalo?
-A water buffalo
-A water buffalo
- Tue Jan 31, 2017 2:18 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Necessity for a Salt Bridge
- Replies: 1
- Views: 489
Necessity for a Salt Bridge
In lecture, we learned about the model of a cathode-anode circuit, with electrons transferring from anode to the cathode. My question is how do we connect the circuit in order for it to be in a proper electrical loop. Why is it necessary to have a salt bridge with an aqueous substance like NaCl?
- Mon Jan 23, 2017 10:10 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Collisions of Particles
- Replies: 1
- Views: 508
Collisions of Particles
In the textbook, they described a transfer of energy from a particle of higher energy to one of lower energy upon collision when they are in an isolated container. Is this an example that can connect to thermal energy in that one substance of warmer temperature(i.e-coffee, water, etc) exchanges ener...
- Mon Jan 16, 2017 11:47 pm
- Forum: Phase Changes & Related Calculations
- Topic: Boiling Points at Altitude [ENDORSED]
- Replies: 2
- Views: 671
Boiling Points at Altitude [ENDORSED]
Hi there! I just was wondering about how altitude affects water's boiling points. I don't quite remember is it water's boiling point is lower at altitude? If so, why is that?
- Wed Jan 11, 2017 5:33 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: 8.3 Expansion Work Help? [ENDORSED]
- Replies: 1
- Views: 517
8.3 Expansion Work Help? [ENDORSED]
When I was reading Chapter 8, the book describes this idea of an "irreversible process" of pressure and how pressure cannot reverse a piston in a container. I am not quite sure what they are describing when they say "an infinitesimal change in external pressure does not reverse the di...
- Mon Jan 09, 2017 4:14 pm
- Forum: Phase Changes & Related Calculations
- Topic: Burns Worse from Steam Than Water Example
- Replies: 2
- Views: 829
Burns Worse from Steam Than Water Example
When we talked about how steam burns can be significantly worse than water burns at similar temperatures (Ex: 100 degrees Celsius), I was slightly confused on the math of the equation. Is the calculation for the steam burn a combination of both the heat change from the 100 degrees celsius to approxi...
- Sun Dec 04, 2016 11:46 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3051055
Re: Post All Chemistry Jokes Here
What kind of fish is made of 2 NA atoms?
A two-NA ;)
A two-NA ;)
- Mon Nov 28, 2016 10:26 am
- Forum: Polyprotic Acids & Bases
- Topic: Ka1 vs Ka2 vs Ka3
- Replies: 2
- Views: 8969
Ka1 vs Ka2 vs Ka3
Can someone please explain why as the Ka's increase in subscript, the attraction between opposite charges decrease? Is it because it is harder to separate the cation with the anion? I would love to know.
- Mon Nov 21, 2016 5:19 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3051055
Re: Post All Chemistry Jokes Here
What's 007's Eskimo cousin's name?
Polar Bond :D
Polar Bond :D
- Sun Nov 20, 2016 10:31 am
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Ions and Molecular Orbital Theory
- Replies: 1
- Views: 420
Ions and Molecular Orbital Theory
When we are given a negatively charged ion like O2- or BO-, where are we expected to put the extra valence electron? Is it on the more electronegative atom? And in the case of O2-, does it matter where we put it in the 2p orbital of the molecular orbital diagram?
- Mon Nov 07, 2016 1:57 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: The Difference Between Sigma and Sigma* Levels
- Replies: 1
- Views: 624
The Difference Between Sigma and Sigma* Levels
Can someone tell me for molecular orbital theory why the sigma and sigma* or pi and pi* have different energy levels? Why would the anti-bonding orbital have more energy than the bonding orbital? Is because having a full orbital decreases its energy?
- Sat Oct 29, 2016 8:53 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Group 11 Metals Quantum Numbers
- Replies: 1
- Views: 590
Group 11 Metals Quantum Numbers
On our laminated periodic table, the group 11 metals (Cu, Ag, Au) all have an electron taken out of their s-orbital rather than their d-orbital for the electron configurations in their given spaces i.e-Cu: [Ar]3d10,5s1 Can anyone explain why it is noted the way it is? Also if I were to say for Cu, [...
- Sun Oct 23, 2016 2:28 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: What is an ns-orbital?
- Replies: 1
- Views: 3531
What is an ns-orbital?
In Chapter 2, the textbook defines an "ns-orbital" as "each shell has one-orbital, and the s-orbital in the shell with quantum number n." Are they referring to the donut-like shape of the s-orbital like Dr. Lavelle showed us in-class (aka the diagrams) for each n quantum number?
- Sun Oct 16, 2016 4:19 pm
- Forum: Trends in The Periodic Table
- Topic: Atomic Radius [ENDORSED]
- Replies: 1
- Views: 487
Atomic Radius [ENDORSED]
If the trend for atomic radii is shifting to right of a period and up a column to make it smaller, if we have two elements (such as Li and F) on the same periods, both with different atomic radii and orbitals pertaining to them, can we assume that the different energy levels of the orbitals affect t...
- Wed Oct 05, 2016 3:22 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Wave Function
- Replies: 1
- Views: 369
Wave Function
In the Lecture today (10/5), Dr. Lavelle talked about waves being described as taking on the form of sin- and cos- functions. Now when we graph sin- and cos-, they're usually on a two 2-dimensional graph with and the x and y axis. Are we assuming that the functions become 3-dimensional, or adding a ...