Why did the bear dissolve in water?
It was a polar bear.
Search found 34 matches
- Wed Mar 15, 2017 7:48 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591714
- Tue Mar 14, 2017 5:53 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Formula Sheet for the Final Exam
- Replies: 5
- Views: 1069
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.
- 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: 507
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.
- Wed Mar 01, 2017 11:26 am
- Forum: Administrative Questions and Class Announcements
- Topic: Clarification on extra credit
- Replies: 3
- Views: 800
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.
If we got quiz scores of something like 36, 34, and 28,
would our scores be changed to 36, 34, and 36?
Thank you.
- Mon Feb 27, 2017 9:21 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591714
Re: Post All Chemistry Jokes Here
What's the difference between a politician and a chemist?
Have them both say "unionized"
Have them both say "unionized"
- Sun Feb 26, 2017 9:31 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591714
Re: Post All Chemistry Jokes Here
What is a chemist's favorite kind of tree?
A Chemistree
A Chemistree
- Mon Feb 20, 2017 8:53 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591714
Re: Post All Chemistry Jokes Here
Know any good jokes about sodium?
Na
Na
- Sat Feb 18, 2017 1:53 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591714
Re: Post All Chemistry Jokes Here
Did you hear about the man who got cooled to absolute zero?
He's 0K now.
He's 0K now.
- Mon Feb 13, 2017 2:47 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591714
Re: Post All Chemistry Jokes Here
I don't trust atoms... I heard they make up everything.
- Sat Feb 11, 2017 6:48 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Has the formula sheet changed?
- Replies: 3
- Views: 870
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.
That is in another practice midterm. We don't seem to have any formula to find entropy with variable pressure.
- Fri Feb 10, 2017 6:43 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Has the formula sheet changed?
- Replies: 3
- Views: 870
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...
- 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: 1362
.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?
- Wed Feb 08, 2017 5:55 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Mistake in equations sheet?
- Replies: 1
- Views: 511
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...
- Mon Feb 06, 2017 4:25 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 1
- Replies: 5
- Views: 1054
Re: Quiz 1
Grades can take a while to be uploaded but they are passed out after lectures by your TA :)
- Mon Jan 30, 2017 1:03 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Entropy
- Replies: 2
- Views: 600
Re: Entropy
Entropy has moles in the formula :)
- Wed Jan 25, 2017 10:38 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591714
Re: Post All Chemistry Jokes Here
Why do chemists like nitrates so much?
They're cheaper than day rates.
They're cheaper than day rates.
- Mon Jan 16, 2017 3:50 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Workbook?
- Replies: 3
- Views: 866
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.
- Wed Jan 11, 2017 9:37 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591714
Re: Post All Chemistry Jokes Here
What Did The Bartender Say When Oxygen, Hydrogen, Sulfur, Sodium And Phosphorous Walked Into His Bar?
OH SNaP!
OH SNaP!
- Mon Nov 28, 2016 9:51 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591714
Re: Post All Chemistry Jokes Here
Did you hear oxygen went on a date with potassium?
It went OK.
It went OK.
- Thu Nov 24, 2016 1:50 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591714
- Wed Nov 16, 2016 2:22 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591714
- Sun Nov 13, 2016 8:16 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Do we include (aq) in equilibrium equation?
- Replies: 3
- Views: 870
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?
- 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: 1373
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?
- 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: 797
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?
- Wed Nov 09, 2016 5:06 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591714
- Mon Oct 31, 2016 10:23 am
- Forum: Administrative Questions and Class Announcements
- Topic: Including units in calculations [ENDORSED]
- Replies: 1
- Views: 525
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.
- Sun Oct 30, 2016 2:02 pm
- Forum: Significant Figures
- Topic: Sig fig with constants
- Replies: 2
- Views: 921
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.
- Sat Oct 22, 2016 9:46 pm
- Forum: Electronegativity
- Topic: "Higher" Electron Affinity
- Replies: 4
- Views: 1164
"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?
- Fri Oct 21, 2016 1:39 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Chapter 4 Questions in Workbook
- Replies: 1
- Views: 474
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...
- Wed Oct 19, 2016 10:06 pm
- Forum: Electronegativity
- Topic: Units for electronegativity
- Replies: 4
- Views: 2398
Re: Units for electronegativity
I thought it was because it electronegativies are just relative to one another.
- Tue Oct 11, 2016 9:44 am
- Forum: Administrative Questions and Class Announcements
- Topic: Workbook Quizzes
- Replies: 1
- Views: 280
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.
Thanks.
- Mon Oct 03, 2016 9:59 am
- Forum: SI Units, Unit Conversions
- Topic: How to determine Sig figs? [ENDORSED]
- Replies: 3
- Views: 961
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...
- 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: 3949
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 ...
- Wed Sep 28, 2016 2:19 pm
- Forum: General Science Questions
- Topic: Light as a Wave
- Replies: 3
- Views: 711
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.