Search found 27 matches
- Fri Mar 11, 2016 10:13 pm
- Forum: *Alkenes
- Topic: I AM DYING! PLEASE HELP ME!
- Replies: 3
- Views: 517
Re: I AM DYING! PLEASE HELP ME!
haha I love how you advised counseling to me xD
- Wed Mar 09, 2016 7:16 pm
- Forum: *Alkenes
- Topic: I AM DYING! PLEASE HELP ME!
- Replies: 3
- Views: 517
I AM DYING! PLEASE HELP ME!
tricked you, didn't I?
- Fri Mar 04, 2016 5:18 pm
- Forum: *Haloalkanes
- Topic: CH2I?
- Replies: 2
- Views: 934
CH2I?
why is CH2I called Iodomethyl? I thought CH3I would be Iodomethyl. Thanks!
- Thu Feb 25, 2016 9:48 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: My Girlfriend's Water Broke O_o
- Replies: 1
- Views: 369
My Girlfriend's Water Broke O_o
Well yeah... we were too late... :(
- Fri Feb 19, 2016 6:09 pm
- Forum: General Rate Laws
- Topic: Difference Between General Rate Laws and Rate=k[A]^n
- Replies: 2
- Views: 522
Re: Difference Between General Rate Laws and Rate=k[A]^n
THEY ARE THE SAME! JUST DIFFERENT FORMS.
- Fri Feb 12, 2016 9:59 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Gibbs Free Energy for Ideal Gases
- Replies: 1
- Views: 409
Gibbs Free Energy for Ideal Gases
Is the gibbs free energy for ideal gases always zero? please explain why
- Thu Feb 04, 2016 7:52 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: I OXIDENTLY reduced your son...
- Replies: 1
- Views: 283
I OXIDENTLY reduced your son...
my apologies
- Wed Jan 27, 2016 7:48 pm
- Forum: Phase Changes & Related Calculations
- Topic: CONSTANT TEMPERATURE?
- Replies: 2
- Views: 414
CONSTANT TEMPERATURE?
Why does a phase change occur at constant temperature if heat is being added?
- Wed Jan 27, 2016 12:12 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: 8.67
- Replies: 1
- Views: 322
8.67
For part A on chapter 8, number 67, why is the equation
H2 + 1/2 O2 --> H2O
as opposed to
2H2 + O2 --> 2H2O
H2 + 1/2 O2 --> H2O
as opposed to
2H2 + O2 --> 2H2O
- Fri Jan 22, 2016 6:25 pm
- Forum: Phase Changes & Related Calculations
- Topic: Molar Kinetic Energy?
- Replies: 1
- Views: 1225
Molar Kinetic Energy?
Chapter 8, question 103 asks to calculate the molar kinetic energy. The Students' Solution Manual says to use the equation 3/2*RT. Can someone derive this equation please? I understand that the units of R (J*/(K*mol)) and T (K) end up becoming J/mol when multiplied together. But where did this equat...
- Tue Jan 19, 2016 4:14 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Perfect System
- Replies: 3
- Views: 618
Re: Perfect System
It doesn't really matter, since it's just arithmetic. Your focus should be on the system, so that's why surroundings is usually negative.
- Mon Jan 18, 2016 8:56 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Entropy Joke
- Replies: 1
- Views: 507
Entropy Joke
There's so much disorder that I don't understand the joke!
- Wed Jan 13, 2016 11:21 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: INFINITE ENERGY JOKE
- Replies: 1
- Views: 325
INFINITE ENERGY JOKE
Thermodynamics can't explain video game logic.
- Fri Jan 08, 2016 11:20 am
- Forum: Phase Changes & Related Calculations
- Topic: Thermochemistry Joke #1
- Replies: 1
- Views: 847
Thermochemistry Joke #1
Starting week 1 off with a simple joke
- Fri Dec 04, 2015 2:59 pm
- Forum: Empirical & Molecular Formulas
- Topic: Final Set of Jokes
- Replies: 3
- Views: 557
Final Set of Jokes
Best set of jokes for the end of the quarter. Enjoy :)
- Wed Dec 02, 2015 9:18 am
- Forum: *Titrations & Titration Calculations
- Topic: Solutions Joke
- Replies: 1
- Views: 424
Solutions Joke
Just a cheesy joke I found while surfing the web. If it's hard to read the text it goes like this: Top Left: Solvent - "I like you, but we're from different states. It'll never work" Top Right: Solvent - "We can't be together" Bottom Left: Solute - "Oh, but we can" Bott...
- Fri Nov 20, 2015 3:08 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Electron Uncertainty Joke
- Replies: 1
- Views: 468
Electron Uncertainty Joke
Electrons are such a tease.
- Sun Nov 15, 2015 12:26 pm
- Forum: Ideal Gases
- Topic: PV=nRT
- Replies: 2
- Views: 758
Re: PV=nRT
PV=nRT Let's say nRT equals some constant 20. So now we have PV=20. Let's also say P=10 and V=2. Now if we double the volume, with your logic the pressure should also double. If that happens, P=20, V=4 --> 20x4=80 But we said PV=20 So if Volume doubles, Pressure halves. P=5, V=4 --> 5x4=20 Mathemati...
- Sun Nov 15, 2015 12:19 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Endothermic/Exothermic vs Endergonic/Exergonic
- Replies: 1
- Views: 761
Endothermic/Exothermic vs Endergonic/Exergonic
Is there a major difference between endothermic and endergonic? Graphically, they look the same to me. The former deals with an "Enthalpy vs Coordination Reaction" graph while the latter deals with a "Free Energy vs Coordination Reaction" graph. But do they function similarly?
- Sun Nov 15, 2015 12:13 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligand Definition and Coordination Number
- Replies: 2
- Views: 806
Re: Ligand Definition and Coordination Number
A ligand can be either an atom or a molecule that binds to a transition metal.
I'm not sure about the coordination number though. :/
I'm not sure about the coordination number though. :/
- Thu Nov 05, 2015 1:32 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Can oxalate ion be monodentate?
- Replies: 1
- Views: 519
Re: Can oxalate ion be monodentate?
My best guess (I could be wrong) is that carbonic acid can easily lose hydrogen because of the multiple resonance structures it will have. More resonance means more stability. Perhaps carbonate has more resonance when it forms one bond compared to oxalate. That's just a possibility. I'm not exactly ...
- Thu Nov 05, 2015 1:26 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: CIS/TRANS - NEVER FORGET IT AGAIN!!!
- Replies: 2
- Views: 408
CIS/TRANS - NEVER FORGET IT AGAIN!!!
If you cannot remember the difference between CIS and TRANS, you will never forget again!
- Fri Oct 30, 2015 10:21 am
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Quiz 2 preparation
- Replies: 1
- Views: 850
Re: Quiz 2 preparation
Oxygen has 2 unpaired electrons while Nitrogen has 3. If you look at both of their 2P orbitals, Nitrogen has all of them half filled, which is more stable than Oxygen, which has 2 of of them half filled and one of them full. I'm assuming that the stability Oxygen gets when it loses its one electron ...
- Fri Oct 23, 2015 11:53 am
- Forum: Octet Exceptions
- Topic: Why does Sulfur accommodate expanded octet?
- Replies: 2
- Views: 3765
Re: Why does Sulfur accommodate expanded octet?
Sulfur may be in the same group as Oxygen, but it is in a period below Oxygen. This extra period correlates to an extra energy level. Sulfur is in the 3rd period, meaning it has a highest energy level of n=3. This means Sulfur has access to the 3s, 3p, and 3d orbitals. Oxygen, however, only has acce...
- Thu Oct 15, 2015 11:35 am
- Forum: Formal Charge and Oxidation Numbers
- Topic: Chlorine and Oxidation States
- Replies: 5
- Views: 3015
Re: Chlorine and Oxidation States
I just looked at the noble gas before and after Chlorine (Neon and Argon, respectively). Neon is 7 electrons less than Chlorine, so Chlorine's maximum oxidation state would be +7. It's +7 and not -7, because Chlorine would have to LOSE 7 electrons to equate the number of electrons that Neon has. Alt...
- Tue Oct 06, 2015 2:56 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: energy of electron in H-Atom
- Replies: 2
- Views: 408
Re: energy of electron in H-Atom
Yes. Imagine going from -3 to -2 on a number scale. You are increasing the value by positive 1. Hence, you are INCREASING. When n approaches infinity, the energy of the electron becomes zero, as you said. However, at ground state, the electron has some negative value. Increasing the energy levels ge...
- Fri Oct 02, 2015 11:20 am
- Forum: Properties of Light
- Topic: % Yield
- Replies: 5
- Views: 1111
Re: % Yield
Theoretical yield is the amount of a substance one has at the end of an experimental calculation. So whenever you are solving problems, the answer you find when you do all of those mole conversions is the THEORETICAL. The actual yield is the one found in the lab, and the point of the percent yield i...