Dear Dr. Lavelle,
Thank you so much for introducing me to college chemistry. Your class was the one that I was most nervous about, but I learned that a class is nothing to be afraid of. Thank you so much for all of the help that you provide, and the cheeriness that you bring to class every day.
Search found 18 matches
- Sun Mar 19, 2017 9:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Saying Thank You to Dr. Lavelle
- Replies: 490
- Views: 504088
- Sat Mar 18, 2017 12:28 pm
- Forum: *Cyclopropanes and Cyclobutanes
- Topic: Draw the conformations
- Replies: 2
- Views: 1398
Re: Draw the conformations
Thank you!!!
- Fri Mar 17, 2017 11:41 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Winter 2015 Final #6B
- Replies: 1
- Views: 436
Winter 2015 Final #6B
For the pre-equilibrium approach step, I used K(1) instead of k(1)/k(-1). Would I get marked off for that?
- Fri Mar 17, 2017 8:31 pm
- Forum: *Cyclopropanes and Cyclobutanes
- Topic: Draw the conformations
- Replies: 2
- Views: 1398
Draw the conformations
I understand how to draw chair and boat conformations, but I'm having trouble figuring out how to represent conformations like butterfly and envelope clearly. Will we have to know how to draw these on the final?
- Tue Feb 21, 2017 9:50 am
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: 2017 Quiz 2
- Replies: 4
- Views: 854
Re: 2017 Quiz 2
Using the equation ln(k2/k1)=(Ea/R)(1/T1-1/T2), imagine Ea getting really really small. If Ea becomes zero, then multiplied by (1/T1-1/T2) we find that the temperature becomes insignificant, so it relies on the rate constants over anything else.
- Mon Feb 20, 2017 10:18 pm
- Forum: *Enzyme Kinetics
- Topic: Quiz 2 Prep #9
- Replies: 3
- Views: 990
Re: Quiz 2 Prep #9
But... It's not even in the course reader.
- Sun Feb 19, 2017 5:37 pm
- Forum: *Enzyme Kinetics
- Topic: Quiz 2 Prep #9
- Replies: 3
- Views: 990
Quiz 2 Prep #9
I'm assuming that this isn't going to be on the quiz, but I'd still like to understand #9 on the quiz 2 prep if anybody could explain it: Which if the following statements about enzymes is incorrect? A When the concentration of substrate is low, the rate of an enzyme-catalyzed reaction increases wit...
- Mon Feb 13, 2017 10:19 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Platinum added to Galvanic Cells
- Replies: 1
- Views: 1073
Platinum added to Galvanic Cells
So what exactly are the rules around adding platinum to galvanic cells? I know to use it with aqueous solutions, an aqueous and a gas, or when using solid Iodine. Is there anything that I'm missing?
- Sat Feb 11, 2017 8:38 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Winter 2013 Midterm Question 5B
- Replies: 1
- Views: 419
Winter 2013 Midterm Question 5B
Arrange the following substances in order of increasing standard molar entropy: CHF3 (g), CF4 (g), CH3F (g), CH2F2 (g)
- Sat Feb 11, 2017 10:45 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Galvanic Cells with commas [ENDORSED]
- Replies: 1
- Views: 524
Galvanic Cells with commas [ENDORSED]
What does it mean when there's a comma between 2 elements in a galvanic cell?
Like Cu(s)|Cu^2+(aq)||Ce^4+,Ce^3+(aq)|Pt(s)
Like Cu(s)|Cu^2+(aq)||Ce^4+,Ce^3+(aq)|Pt(s)
- Fri Jan 13, 2017 5:07 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Thinking Point 8.5
- Replies: 1
- Views: 423
Re: Thinking Point 8.5
I was wondering about that too. My thoughts were that the metal is a better conductor than the air and since there is no phase change of the pan turning into a liquid or vapor, the pan itself is the only thing that can scald you.
- Sun Nov 13, 2016 12:53 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: chelating complexes
- Replies: 1
- Views: 547
chelating complexes
What are chelating complexes?
- Sun Oct 30, 2016 10:24 pm
- Forum: Einstein Equation
- Topic: Use of symbols
- Replies: 6
- Views: 1116
Re: Use of symbols
Since the TA's are probably grading it, I'd suggest you shoot a quick email to one of them and see what they say. When in doubt, though, just use v instead of f. You'll get an equation sheet and it'll be written that way on the sheet as well, so just double check with that.
- Sat Oct 22, 2016 11:04 pm
- Forum: Student Social/Study Group
- Topic: Sproul Hall Chem14A Study Group
- Replies: 30
- Views: 3812
Re: Sproul Hall Chem14A Study Group
Alyssa_Hsu_1G wrote:Are people interested in having a session this Sunday so we can work on workbook questions for quiz 2?
I would like to join as well!
- Sat Oct 22, 2016 1:26 pm
- Forum: Octet Exceptions
- Topic: Octet exceptions and double bonds
- Replies: 3
- Views: 733
Re: Octet exceptions and double bonds
That makes sense. Thank you!
- Sat Oct 22, 2016 11:41 am
- Forum: Octet Exceptions
- Topic: Octet exceptions and double bonds
- Replies: 3
- Views: 733
Octet exceptions and double bonds
How do we know when to use a double bond with exceptions to the octet rule (like with XeOF(4))? Does it have to do with the future charge?
- Sun Oct 09, 2016 7:20 pm
- Forum: Limiting Reactant Calculations
- Topic: Limiting Reactant [ENDORSED]
- Replies: 2
- Views: 731
Re: Limiting Reactant [ENDORSED]
You find the number of moles of NO that NH3 will produce, then find the number of moles of NO that CO2 will produce, and whichever amount produces the least amount of NO will be the limiting reactant. Basically, you take the two reactants and find out which one produces the least amount of product.
- Sun Oct 02, 2016 10:54 am
- Forum: Molarity, Solutions, Dilutions
- Topic: G.27
- Replies: 1
- Views: 631
G.27
I'm doing this out of the fifth edition book, so I'm not sure what number this is in the 6th edition, but here's the question: G.27 The concentration of toxic chemicals in the environment is often measured in parts per million (ppm) or even parts per billion (ppb). A solution in which the concentrat...