CHEMISTRY COMMUNITY

Casey Monahan 2C

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.

Casey Monahan 2C

Thank you!!!

Casey Monahan 2C

For the pre-equilibrium approach step, I used K(1) instead of k(1)/k(-1). Would I get marked off for that?

Casey Monahan 2C

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?

Casey Monahan 2C

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.

Casey Monahan 2C

But... It's not even in the course reader.

Casey Monahan 2C

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...

Casey Monahan 2C

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?

Casey Monahan 2C

Arrange the following substances in order of increasing standard molar entropy: CHF3 (g), CF4 (g), CH3F (g), CH2F2 (g)

Casey Monahan 2C

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)

Casey Monahan 2C

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.

Casey Monahan 2C

What are chelating complexes?

Casey Monahan 2C

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.

Casey Monahan 2C

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!

Casey Monahan 2C

That makes sense. Thank you!

Casey Monahan 2C

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?

Casey Monahan 2C

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.

Casey Monahan 2C

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...

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Search found 18 matches

Re: Saying Thank You to Dr. Lavelle

Re: Draw the conformations

Winter 2015 Final #6B

Draw the conformations

Re: 2017 Quiz 2

Re: Quiz 2 Prep #9

Quiz 2 Prep #9

Platinum added to Galvanic Cells

Winter 2013 Midterm Question 5B

Galvanic Cells with commas [ENDORSED]

Re: Thinking Point 8.5

chelating complexes

Re: Use of symbols

Re: Sproul Hall Chem14A Study Group

Re: Octet exceptions and double bonds

Octet exceptions and double bonds

Re: Limiting Reactant [ENDORSED]

G.27