Search found 24 matches
- Sat Mar 12, 2016 6:35 pm
- Forum: *Chem3D
- Topic: 3D Conformations
- Replies: 1
- Views: 1275
3D Conformations
If asked on the final to draw the most stable conformation or the boat conformation, do we have to draw it in 3D with a small shading part?
- Fri Mar 11, 2016 5:39 pm
- Forum: Calculating Work of Expansion
- Topic: Systems Under Constant Pressure
- Replies: 1
- Views: 420
Systems Under Constant Pressure
When solving thermodynamic problems, does constant pressure mean an adiabatic system (q=0)?
- Tue Mar 01, 2016 8:57 pm
- Forum: *Alkanes
- Topic: Tert vs. neo
- Replies: 1
- Views: 449
Tert vs. neo
What is the difference between tert- and neo-?
- Fri Feb 26, 2016 3:39 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 Winter 2016
- Replies: 48
- Views: 20590
Re: Quiz 3 Winter 2016
When being asked to name a compound, are we going to have to give the IUPAC and common name? Or, is just the IUPAC name okay? (For the final also?)
- Tue Feb 16, 2016 2:45 pm
- Forum: First Order Reactions
- Topic: Rate Constant
- Replies: 1
- Views: 493
Rate Constant
So for the rate constant of a first order reaction will the slope always turn out negative and then you k is the negative of the slope? What if the slope is positive would you still place a negative in front to get k? Does this only refer to first order reactions?
- Sun Feb 14, 2016 1:00 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Mechanism
- Replies: 1
- Views: 424
Mechanism
So what exactly is a mechanism? Is it just the way that you split the reaction into elementary steps?
- Wed Feb 03, 2016 9:17 pm
- Forum: Balancing Redox Reactions
- Topic: Oxidizing/Reducing Agent
- Replies: 1
- Views: 484
Oxidizing/Reducing Agent
Is the oxidizing agent the same as the one that is being oxidized? Same for reducing agents?
- Tue Jan 26, 2016 7:27 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: dG=-RTlnK
- Replies: 1
- Views: 971
dG=-RTlnK
Will this equation be on quiz number one?
- Mon Jan 25, 2016 9:15 pm
- Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
- Topic: Residual Entropy
- Replies: 5
- Views: 1887
Residual Entropy
What is residual entropy? How is it different from normal entropy and how do you calculate it?
For example HW 9.75, where did Avogadro's number come from?
For example HW 9.75, where did Avogadro's number come from?
- Sun Jan 24, 2016 11:58 am
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Quiz #1
- Replies: 1
- Views: 408
Quiz #1
It seems like we are almost done with chapter 9 in the course reader, and Lavelle said up to the end of Friday's lecture, which was the start of Gibbs Free Energy, will be on the quiz. So when reading chapter 9 in the book, how much of the reading (sections) on Gibbs free energy will be on the quiz?
- Sun Jan 17, 2016 5:11 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2973518
Re: Chemistry Jokes
Q: Sulfur and Oxygen are best friends, but they lived far from each other. How did oxygen chat with his friend?
A: He used his Sulfone
A: He used his Sulfone
- Sun Jan 10, 2016 3:41 pm
- Forum: Phase Changes & Related Calculations
- Topic: Phase Change Picture
- Replies: 1
- Views: 631
Phase Change Picture
Hi guys :) so I just wanted to add a link for a phase change graph. I thought it was pretty cool cause it has a few more details and is a bit more clear than the picture in the course reader (or if you do not have the course reader). So, here's the link: http://mrzimmerman.org/New%20Folder/HW/phases...
- Tue Dec 01, 2015 8:18 pm
- Forum: Polyprotic Acids & Bases
- Topic: HW # 12.79
- Replies: 1
- Views: 592
HW # 12.79
In the solutions manual, it says that the initial concentrations of HSO4- and H3O+ are 0.15 mol. How do we know that it was fully dissociated to the H3O+ rather than the other compound?
- Tue Dec 01, 2015 7:35 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Rounding off
- Replies: 2
- Views: 707
Re: Rounding off
Corresponding to what Phu Mai 4G said, it can also be disregarded if x is less than 5% of the initial value.
- Mon Nov 23, 2015 9:11 pm
- Forum: Naming
- Topic: Using the word ion
- Replies: 2
- Views: 783
Re: Using the word ion
The phrase ion is used at the end when you are naming an ion complex which like Rachel said is when the complex has a negative or positive charge. When it is just a coordination compound (neutral charge), you do not say ion after you write out the name.
- Wed Nov 18, 2015 5:29 pm
- Forum: Naming
- Topic: Order of ligands
- Replies: 2
- Views: 674
Re: Order of ligands
Within the coordination sphere, you write the transition metal first. Afterwards, you write the anionic ligands followed by neutral ligands.
- Tue Nov 10, 2015 3:42 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Calculating the value of K
- Replies: 1
- Views: 509
Calculating the value of K
This is a question from Chapter 11 homework page 457 problem 11.37B. So it originally gives you the equation N2 + 3H2 -> 2NH3 and a K that is equal to 41 In part B, it asks you to find K for (1/2)N2 + (3/2)H2 -> NH3 I noticed that each coefficient had decreased by half, but the solution manual says ...
- Fri Nov 06, 2015 12:05 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Formation Constant vs. Equilibrium constant
- Replies: 2
- Views: 7444
Formation Constant vs. Equilibrium constant
What is the difference between a formation constant and an equilibrium constant? Or are they the same thing? The textbook and course reader each use a different one.
- Tue Oct 27, 2015 3:13 pm
- Forum: Hybridization
- Topic: Coefficients for Hybridization
- Replies: 1
- Views: 513
Coefficients for Hybridization
When I am predicting the type of hybrid orbital for lets say H3O+, can I just say sp^3? Or do I have to say 2sp^3 because O is in the second period of the period table?
- Wed Oct 21, 2015 6:30 pm
- Forum: Resonance Structures
- Topic: Resonance Arrows
- Replies: 3
- Views: 799
Resonance Arrows
I know when you draw a resonance arrow between two structures it is just a double headed arrow, but how do you draw them if there are three structures? Is there a special way like almost forming a triangle between the three structures? Or, can you just draw them all side by side in no order?
- Thu Oct 15, 2015 2:24 pm
- Forum: Lewis Structures
- Topic: Exceptions to the Octet Rule
- Replies: 2
- Views: 643
Exceptions to the Octet Rule
So I know that H, Li,and Be are exceptions to the octet rule but is He also? The first lecture we began discussing lewis structures I remember Lavelle saying "H, He, Li,and Be," but the course reader only says three? Then two lectures later, he said it again... so yea? is He considered an ...
- Sun Oct 11, 2015 10:13 pm
- Forum: Photoelectric Effect
- Topic: 2013 Fall Prep Quiz 1 Question 10
- Replies: 1
- Views: 673
2013 Fall Prep Quiz 1 Question 10
Okay, so I understood how to do the problem it was just once I reached the answer I got a different answer. I was not off by much but enough to get the answer wrong. It was just somewhere my sig figs messed up and resulted in the wrong number. After calculating the E=hv, I got 1.02 x 10^-9. I guess ...
- Thu Oct 08, 2015 9:52 pm
- Forum: Einstein Equation
- Topic: Work Function
- Replies: 1
- Views: 760
Work Function
In problems that give you the work function value, how am I able to tell whether there is an amount for kinetic energy or not (0)?
- Thu Oct 01, 2015 7:07 pm
- Forum: Properties of Light
- Topic: Question: Wave Model vs. Photon Model of Light
- Replies: 7
- Views: 3502
Re: Question: Wave Model vs. Photon Model of Light
I believe the wave model demonstrated that light had only contained wave properties. Therefore, it did not involve the idea of quanta. The photoelectric effect, like Neil said, proved that light has wave and particle properties. It showed that if light had only wave properties, then electrons should...