What would you call a clown in jail?
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- Thu Mar 14, 2019 8:42 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
- Thu Mar 14, 2019 8:41 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
What element derives from a Norse [censored]?
Thorium.
Thorium.
- Thu Mar 14, 2019 8:41 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Organic chemistry is difficult. It causes alkynes of problems.
- Tue Mar 05, 2019 4:57 pm
- Forum: Zero Order Reactions
- Topic: 7A 15
- Replies: 4
- Views: 526
Re: 7A 15
By looking at the first and fourth experiment, you can see that the only concentration change is C but the initial rate in both those experiments are the same, therefore concentration doesn't change the rate of the reaction and that's the definition of a zero order reaction.
- Tue Mar 05, 2019 4:52 pm
- Forum: Zero Order Reactions
- Topic: Units of K
- Replies: 2
- Views: 297
Re: Units of K
just m/s
- Tue Mar 05, 2019 4:46 pm
- Forum: Zero Order Reactions
- Topic: zero order rate?
- Replies: 14
- Views: 1608
Re: zero order rate?
That's correct! zeroth-order reactions have rates that won't vary when the reactant concentrations change. If the concentrations of reactants change and the rate remains the same, the reaction is zero order.
- Mon Feb 25, 2019 8:44 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
What kind of dogs do chemists have?
Laboratory Retrievers
Laboratory Retrievers
- Mon Feb 25, 2019 8:44 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
What do you call a clown who's in jail?
A silicon.
A silicon.
- Mon Feb 25, 2019 8:42 pm
- Forum: Balancing Redox Reactions
- Topic: Test #2
- Replies: 9
- Views: 933
Re: Test #2
Just Gibbs and electrochemical thru (but not including) the Nernst equation taught today in class (Feb. 25)
- Sun Feb 17, 2019 9:37 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Silver walks up to gold in a bar and says, "Au, get outta here!"
- Sun Feb 17, 2019 9:36 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
What show do cesium and iodine love to watch together?
CsI
CsI
- Sun Feb 17, 2019 9:36 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
What is the chemical formula for a banana?
BaNa2
BaNa2
- Sun Feb 17, 2019 9:35 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
What element is a girl's future best friend?
Carbon.
Carbon.
- Sun Feb 17, 2019 9:24 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Two Gibbs Free Energy Formulas
- Replies: 2
- Views: 324
Re: Two Gibbs Free Energy Formulas
It'll depend on what information the question gives you. Based on that, you can solve by plugging in the given numbers.
- Sun Feb 17, 2019 9:23 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs Free energy and spontaneity
- Replies: 2
- Views: 248
Re: Gibbs Free energy and spontaneity
when delta G is negative, free energy is being released, which is what makes it spontaneous
- Mon Feb 04, 2019 5:21 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
The best thing about learning equilibrium is that nothing changes.
- Mon Feb 04, 2019 5:20 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
The name's Bond. Ionic Bond. Taken, not shared.
- Mon Feb 04, 2019 5:19 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
If the Silver Surfer and Iron Man team up, they'd be alloys.
- Sat Jan 26, 2019 12:36 pm
- Forum: Ideal Gases
- Topic: PV=nRT
- Replies: 8
- Views: 1158
Re: PV=nRT
If you need to solve a PV=nRT equation, temperature will almost always be given. Also, R is a constant on our sheet, you just need to figure out which R works in the situation (whether or not the problem is asking in bar or atm).
- Sat Jan 26, 2019 12:35 pm
- Forum: Ideal Gases
- Topic: kc vs kp
- Replies: 19
- Views: 3513
Re: kc vs kp
Kp is for pressure, whereas Kc is for concentration. When writing out the formula for Kp, you must say the partial pressure of the compound (for example, P subscript O2). For Kc, you don't use the large P, you simply put it in brackets to indicate concentration.
- Sat Jan 26, 2019 12:33 pm
- Forum: Ideal Gases
- Topic: atm vs. bar?
- Replies: 25
- Views: 2974
Re: atm vs. bar?
They're different units of measure for pressure. It's essential that you identify the correct units in order to plug in the correct value for the R constant in PV=nRT.
- Sat Jan 26, 2019 12:32 pm
- Forum: Ideal Gases
- Topic: ICE Table Values
- Replies: 9
- Views: 1309
Re: ICE Table Values
I usually convert from moles to concentration or even pressure, otherwise your calculations may get messed up. I believe you can use moles, but it's a little more challenging that way.
- Wed Jan 23, 2019 9:24 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Q: What is CH2O?
A: Seawater
A: Seawater
- Wed Jan 23, 2019 9:23 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Temperature change
- Replies: 5
- Views: 594
Re: Temperature change
It'll depend on if the reaction is endo- or exo- thermic.
If endothermic, the reaction will move to the right when heat is added.
If exothermic, the reaction will move to the left when heat is added.
If endothermic, the reaction will move to the right when heat is added.
If exothermic, the reaction will move to the left when heat is added.
- Wed Jan 23, 2019 9:20 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Endothermic vs. Exothermic
- Replies: 8
- Views: 816
Re: Endothermic vs. Exothermic
If the reaction is endothermic, then the products are favored when temperature increases.
If the reaction is exothermic, then the reactants are favored when temperature increases.
The opposite is true for each of the above statements when temperature decreases.
If the reaction is exothermic, then the reactants are favored when temperature increases.
The opposite is true for each of the above statements when temperature decreases.
- Sun Jan 13, 2019 11:48 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
I asked the guy next to me if he had any sodium hypobromite. He said NaBrO.
- Sun Jan 13, 2019 11:47 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Q: What animal is made up of calcium, nickel and neon?
A: A CaNiNe
A: A CaNiNe
- Sun Jan 13, 2019 11:39 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: K vs Q [ENDORSED]
- Replies: 7
- Views: 793
Re: K vs Q [ENDORSED]
The formula is the same, but K is the ratio at equilibrium, whereas Q is the reaction quotient. The numbers you plug in decide whether you're using K or Q.
- Wed Jan 09, 2019 7:29 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Q: Why was the mole of oxygen molecules excited when he left the singles bar?
A: He got Avogadro’s number!
A: He got Avogadro’s number!
- Wed Jan 09, 2019 7:29 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Q: How can you tell the chemist in the restroom?
A: He washes his hands BEFORE he goes.
A: He washes his hands BEFORE he goes.
- Wed Jan 09, 2019 7:28 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Q: Why do chemists like nitrates so much?
A: They are cheaper than day rates.
A: They are cheaper than day rates.
- Mon Dec 03, 2018 5:49 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Organic chemistry is difficult.
Those who study it have alkynes of trouble.
Those who study it have alkynes of trouble.
- Mon Dec 03, 2018 5:47 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: what is a ligand?
- Replies: 8
- Views: 883
Re: what is a ligand?
A ligand is an ion or a molecule that donates electrons (Lewis base) that binds to the central atom and help in making coordination compounds
- Mon Dec 03, 2018 5:40 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
A photon checks into a hotel and is asked if he needs any help with his luggage.
He says, "No, I'm traveling light."
He says, "No, I'm traveling light."
- Wed Nov 21, 2018 4:34 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Why did the bear dissolve in water?
Because it was polar.
Because it was polar.
- Wed Nov 21, 2018 4:34 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
What's a pirate's favorite element? (your victim may assume "arrrrgon".)
Gold.
Gold.
- Wed Nov 21, 2018 4:33 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
I would tell another chemistry joke, but all the good ones Argon.
- Wed Nov 21, 2018 4:32 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Two atoms are walking down the street.
One of them shouts, "Hey! I think I lost an electron!"
The other inquires, "Are you sure?"
"Yes, I'm positive!"
One of them shouts, "Hey! I think I lost an electron!"
The other inquires, "Are you sure?"
"Yes, I'm positive!"
- Wed Nov 21, 2018 4:27 pm
- Forum: Ionic & Covalent Bonds
- Topic: Bond Lengths
- Replies: 10
- Views: 1093
Re: Bond Lengths
Because there is resonance, you can average the two. The average of 140 and 120 is 130, therefore the bond length should be 130 rpm
- Wed Nov 21, 2018 4:02 pm
- Forum: Ionic & Covalent Bonds
- Topic: delta positive delta negative
- Replies: 15
- Views: 2339
Re: delta positive delta negative
The electron acceptor is usually the more electronegative and tends to be delta negative.
- Sun Nov 18, 2018 3:57 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Why did the acid go to the gym?
To become a buffer solution!
To become a buffer solution!
- Sun Nov 18, 2018 3:56 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Why did the noble gas cry?
Because all his friends argon.
Because all his friends argon.
- Sun Nov 18, 2018 3:56 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
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.
- Tue Nov 06, 2018 6:30 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Did you hear about the industrialist who had a huge chloroform spill at his factory? His business went insolvent.
- Tue Nov 06, 2018 6:29 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Why does a hamburger have lower energy than steak? Because it's in the ground state.
- Tue Nov 06, 2018 6:27 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
I don't trust atoms...
I heard they make up everything
I heard they make up everything
- Mon Oct 29, 2018 6:05 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Q: If a mole of moles were digging a mole of holes, what would you see?
A: A mole of molasses.
A: A mole of molasses.
- Mon Oct 29, 2018 6:01 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Q: What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
A: A ferrous wheel
A: A ferrous wheel
- Mon Oct 29, 2018 5:59 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
A chemistry professor couldn't resist interjecting a little philosophy into a class lecture. He interrupted his discussion on balancing chemical equations, saying, "Remember, if you're not part of the solution, you're part of the precipitate!"
- Wed Oct 24, 2018 11:13 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
What do you call a tooth in a glass of water?
One molar solution
One molar solution
- Wed Oct 24, 2018 1:16 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Did you hear the one about cobalt, radon, and yttrium?
It was CoRnY.
It was CoRnY.
- Wed Oct 24, 2018 1:16 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
I tried writing jokes about the periodic table
...but I realized I wasn’t quite in my element.
...but I realized I wasn’t quite in my element.
- Sun Oct 21, 2018 12:34 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
What is "HIJKLMNO"?
H2O.
H2O.
- Sun Oct 21, 2018 12:32 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Why do chemists enjoy working with ammonia?
Because it's pretty basic stuff.
Because it's pretty basic stuff.
- Sun Oct 21, 2018 12:29 pm
- Forum: Properties of Light
- Topic: TEST 2
- Replies: 7
- Views: 838
Re: TEST 2
Professor Lavelle mentioned in his office hours that we will have the same formula sheet on each of the tests, so no need to memorize them!
- Sun Oct 14, 2018 11:21 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705663
Re: Post All Chemistry Jokes Here
Have you heard the one about a chemist who was reading a book about helium?
He just couldn't put it down.
He just couldn't put it down.
- Sun Oct 14, 2018 11:18 am
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Moles [ENDORSED]
- Replies: 6
- Views: 1273
Re: Moles [ENDORSED]
FrankieClarke4B wrote:While looking at this equation: Fe2O3(s)+ 3 CO2(g) ------> 2 Fe(s) + 3 CO2(g)
it implies that 2 mol Fe ~ 1 mol Fe2O3
How does this imply that 2 mol of iron equals 1 mol of the compound?
It's a ratio. It is saying that there are two moles of iron for every one mole of the compound Fe2O3.
- Sun Oct 14, 2018 11:13 am
- Forum: Significant Figures
- Topic: knowing how many sig figs to use
- Replies: 17
- Views: 2221
Re: knowing how many sig figs to use
I am still a bit confused on significant figures and when to use a certain number of sig figs. Will the answer to a problem always have the same number of sig figs as in the question? For addition and subtraction, you want to use the least number of decimal points from the values given to you in th...
- Fri Oct 05, 2018 8:56 am
- Forum: General Science Questions
- Topic: Common ions
- Replies: 4
- Views: 591
Common ions
I know that Professor Lavelle mentioned that we'll learn as we go, but is there any tips for memorizing common ions and their charges? I've always had trouble with that, even in high school chemistry. Thanks!
- Fri Oct 05, 2018 8:53 am
- Forum: General Science Questions
- Topic: Periodic Table
- Replies: 16
- Views: 1676
Re: Periodic Table
Gillian Ward 4H wrote:How should you round the atomic weights of the elements on the periodic table when using it for calculations and how many decimal places should you go out to?
I usually use the entire atomic weight given so that my final answer is more accurate than if I were to round from the start.
- Fri Oct 05, 2018 8:50 am
- Forum: General Science Questions
- Topic: Rusty on High School Chem [ENDORSED]
- Replies: 347
- Views: 445091
Re: Rusty on High School Chem [ENDORSED]
Hi everyone! I hadn't taken a chemistry course since my sophomore year in high school, and after the first lecture, I was a bit lost in Chem14A's content. However, I have found that using Dr. Lavelle's website (his audio/visual modules) is quite helpful in reviewing the material that I should've ma...