## 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: 229
Views: 103922

### Re: Saying Thank You to Dr. Lavelle

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.
Sat Mar 18, 2017 12:28 pm
Forum: *Cyclopropanes and Cyclobutanes
Topic: Draw the conformations
Replies: 2
Views: 578

### 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: 259

### 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: 578

### 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: 521

### 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: 506

### 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: 506

### 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: 635

### 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: 263

### 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: 250

### 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)
Fri Jan 13, 2017 5:07 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Thinking Point 8.5
Replies: 1
Views: 234

### 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: 299

### chelating complexes

What are chelating complexes?
Sun Oct 30, 2016 10:24 pm
Forum: Einstein Equation
Topic: Use of symbols
Replies: 6
Views: 696

### 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: 2437

### 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: 435

### 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: 435

### 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: 472

### 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: 309

### 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...