Search found 34 matches

by Lindsey Lill
Wed Mar 15, 2017 7:48 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912669

Re: Post All Chemistry Jokes Here

Why did the bear dissolve in water?

It was a polar bear.
by Lindsey Lill
Tue Mar 14, 2017 5:53 pm
Forum: Administrative Questions and Class Announcements
Topic: Formula Sheet for the Final Exam
Replies: 5
Views: 587

Re: Formula Sheet for the Final Exam

I'm not sure if it's the same one that's on the back of the periodic table. The one on the back of the periodic table has some extra labels which I believe they don't have on the ones for quizzes and exams.
by Lindsey Lill
Tue Mar 07, 2017 11:03 am
Forum: Administrative Questions and Class Announcements
Topic: Don't skip your quizzes even though lowest score is replaced with highest score
Replies: 1
Views: 313

Don't skip your quizzes even though lowest score is replaced with highest score

I'm not sure if Professor ever clarified this but don't skip your last quiz just because lowest score is replaced with highest score! You have to take all the quizzes for that to apply.
by Lindsey Lill
Wed Mar 01, 2017 11:26 am
Forum: Administrative Questions and Class Announcements
Topic: Clarification on extra credit
Replies: 3
Views: 394

Clarification on extra credit

Just for clarification on how the extra credit works...

If we got quiz scores of something like 36, 34, and 28,

would our scores be changed to 36, 34, and 36?

Thank you.
by Lindsey Lill
Mon Feb 27, 2017 9:21 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912669

Re: Post All Chemistry Jokes Here

What's the difference between a politician and a chemist?

Have them both say "unionized"
by Lindsey Lill
Sun Feb 26, 2017 9:31 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912669

Re: Post All Chemistry Jokes Here

What is a chemist's favorite kind of tree?

A Chemistree
by Lindsey Lill
Mon Feb 20, 2017 8:53 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912669

Re: Post All Chemistry Jokes Here

Know any good jokes about sodium?

Na
by Lindsey Lill
Sat Feb 18, 2017 1:53 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912669

Re: Post All Chemistry Jokes Here

Did you hear about the man who got cooled to absolute zero?

He's 0K now.
by Lindsey Lill
Mon Feb 13, 2017 2:47 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912669

Re: Post All Chemistry Jokes Here

I don't trust atoms... I heard they make up everything.
by Lindsey Lill
Sat Feb 11, 2017 6:48 pm
Forum: Administrative Questions and Class Announcements
Topic: Has the formula sheet changed?
Replies: 3
Views: 531

Re: Has the formula sheet changed?

What about delta S = nRln(V2/V1)?

That is in another practice midterm. We don't seem to have any formula to find entropy with variable pressure.
by Lindsey Lill
Fri Feb 10, 2017 6:43 pm
Forum: Administrative Questions and Class Announcements
Topic: Has the formula sheet changed?
Replies: 3
Views: 531

Has the formula sheet changed?

Doing some of the old midterms, there are equations popping up that don't seem to be on our equation sheet, like ln K = nFE/RT. Has the formula sheet changed or something? It just kind of confuses me, I'm not sure whether I'm supposed to be aware of these formulas, and I can't solve the problem with...
by Lindsey Lill
Fri Feb 10, 2017 2:55 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: .05916 In Nernst Equation
Replies: 5
Views: 568

.05916 In Nernst Equation

In our practice midterms, I keep seeing the RT in the Nernst equation written as .05916. Where does this number come from?
by Lindsey Lill
Wed Feb 08, 2017 5:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Mistake in equations sheet?
Replies: 1
Views: 301

Mistake in equations sheet?

On the equation sheet (both the ones I got for 14A and 14B) Faraday's constant is listed as "96,4853 C/mol". Shouldn't it be "96,485.3 C/mol" (with the decimal between 5 and 3?) I know it would make sense for the decimal to be there considering there should only be 3 numbers afte...
by Lindsey Lill
Mon Feb 06, 2017 4:25 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1
Replies: 5
Views: 552

Re: Quiz 1

Grades can take a while to be uploaded but they are passed out after lectures by your TA :)
by Lindsey Lill
Mon Jan 30, 2017 1:03 pm
Forum: Administrative Questions and Class Announcements
Topic: Entropy
Replies: 2
Views: 323

Re: Entropy



Entropy has moles in the formula :)
by Lindsey Lill
Wed Jan 25, 2017 10:38 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912669

Re: Post All Chemistry Jokes Here

Why do chemists like nitrates so much?

They're cheaper than day rates.
by Lindsey Lill
Mon Jan 16, 2017 3:50 pm
Forum: Administrative Questions and Class Announcements
Topic: Workbook?
Replies: 3
Views: 426

Re: Workbook?

I think I will buy an old practice quiz workbook off of someone else since they really helped me with 14A last quarter. You can probably find people selling theirs.
by Lindsey Lill
Wed Jan 11, 2017 9:37 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912669

Re: Post All Chemistry Jokes Here

What Did The Bartender Say When Oxygen, Hydrogen, Sulfur, Sodium And Phosphorous Walked Into His Bar?

OH SNaP!
by Lindsey Lill
Mon Nov 28, 2016 9:51 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912669

Re: Post All Chemistry Jokes Here

Did you hear oxygen went on a date with potassium?

It went OK.
by Lindsey Lill
Thu Nov 24, 2016 1:50 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912669

Re: Post All Chemistry Jokes Here

Image
by Lindsey Lill
Wed Nov 16, 2016 2:22 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912669

Re: Post All Chemistry Jokes Here

Image
by Lindsey Lill
Sun Nov 13, 2016 8:16 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Do we include (aq) in equilibrium equation?
Replies: 3
Views: 407

Do we include (aq) in equilibrium equation?

The notes say not to include solids and liquids in K expression. But the example right after uses an Ca^2+(aq). Why do we use it although it's aqueous? Is it not a liquid?
by Lindsey Lill
Sun Nov 13, 2016 8:11 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Are the coordination numbers just inside of brackets? [ENDORSED]
Replies: 4
Views: 667

Are the coordination numbers just inside of brackets? [ENDORSED]

Say you have a compound like Li[Ni(CN)3(en)(NH3)]. Would the coordination number just be 5 because it only counts inside of the brackets? Or would the Li outside the bracket be counted too so it's 6?
by Lindsey Lill
Sun Nov 13, 2016 7:14 pm
Forum: Administrative Questions and Class Announcements
Topic: Will changes in temperature/pressure on rxns be on quiz 3
Replies: 1
Views: 486

Will changes in temperature/pressure on rxns be on quiz 3

It says on the 14A website that Quiz 3 only covers the first 4 pages of notes of chemical equilibrium. But the graded Quiz 3 in the workbook has questions on pressure and temperature of chemical reactions. This isn't covered until the 8th page of the lecture notes. Will this be on the actual quiz?
by Lindsey Lill
Wed Nov 09, 2016 5:06 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912669

Re: Post All Chemistry Jokes Here

Image
by Lindsey Lill
Mon Oct 31, 2016 10:23 am
Forum: Administrative Questions and Class Announcements
Topic: Including units in calculations [ENDORSED]
Replies: 1
Views: 304

Including units in calculations [ENDORSED]

When we are writing out calculations for quizzes and midterms, do we need to include the units within the calculations to get full points? I'm in the habit of not writing units for the calculation but writing the units in the final answer.
by Lindsey Lill
Sun Oct 30, 2016 2:02 pm
Forum: Significant Figures
Topic: Sig fig with constants
Replies: 2
Views: 532

Re: Sig fig with constants

I think when working with something like n=1, 2, 3, 4... those are like infinite significant figures. They are whole numbers, they do not need a decimal. So I think in that case you would see what the significant figure of the other numbers in the problem are.
by Lindsey Lill
Sat Oct 22, 2016 9:46 pm
Forum: Electronegativity
Topic: "Higher" Electron Affinity
Replies: 4
Views: 521

"Higher" Electron Affinity

Is a "higher" electron affinity technically the more negative one since is energy being released? For example, would -60 be "higher" than -50?
by Lindsey Lill
Fri Oct 21, 2016 1:39 pm
Forum: Administrative Questions and Class Announcements
Topic: Chapter 4 Questions in Workbook
Replies: 1
Views: 284

Chapter 4 Questions in Workbook

In the practice quizzes for Quiz 2 in the workbook, there seem to be questions that deal with things from chapter 4, such as sigma and pi bonds and hybridization. I thought Quiz 2 was only supposed to cover chapters 2 and 3. Are these things just in the practice quizzes since it's from previous year...
by Lindsey Lill
Wed Oct 19, 2016 10:06 pm
Forum: Electronegativity
Topic: Units for electronegativity
Replies: 4
Views: 892

Re: Units for electronegativity

I thought it was because it electronegativies are just relative to one another.
by Lindsey Lill
Tue Oct 11, 2016 9:44 am
Forum: Administrative Questions and Class Announcements
Topic: Workbook Quizzes
Replies: 1
Views: 211

Workbook Quizzes

I know we need to do the in-discussion quizzes in pen, but do we need to do the practice quizzes in our workbook in pen too? The ones that are graded to replace our worst test score?

Thanks.
by Lindsey Lill
Mon Oct 03, 2016 9:59 am
Forum: SI Units, Unit Conversions
Topic: How to determine Sig figs? [ENDORSED]
Replies: 3
Views: 517

Re: How to determine Sig figs? [ENDORSED]

For adding and subtracting: the number with the LEAST significant figures after the decimal point is the number of significant figures you can have. For multiplying and dividing: the number with the LEAST significant figures in the entire number is the number of significant figures you can have. Hop...
by Lindsey Lill
Wed Sep 28, 2016 4:59 pm
Forum: SI Units, Unit Conversions
Topic: When do we know whether to use gram vs. kilogram, etc.? [ENDORSED]
Replies: 4
Views: 780

When do we know whether to use gram vs. kilogram, etc.? [ENDORSED]

Say you are doing a problem using E = (1/2)mv^2. You are multiplying mass times velocity to receive energy. However, how to we know whether to use grams, or kilograms? Are we trying to keep everything the same (such as doing a problem with kJ, kg, and km/s), or do some units need to be in kilo form ...
by Lindsey Lill
Wed Sep 28, 2016 2:19 pm
Forum: General Science Questions
Topic: Light as a Wave
Replies: 3
Views: 585

Re: Light as a Wave

When learning about the photoelectric effect, it's more helpful to think of the light as particles, because the individual particles need to have enough energy to overcome threshold energy. Intensifying the whole wave by just shooting more and more particles won't help anything.

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