Someone threw sodium chloride at me.
I yelled, “That’s a salt!”
Search found 51 matches
- Sun Dec 08, 2019 11:41 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3045820
- Sun Dec 08, 2019 11:41 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3045820
Re: Post All Chemistry Jokes Here
What should you do if no one laughs at your chemistry jokes?
Keep telling them until you get a reaction.
Keep telling them until you get a reaction.
- Sun Dec 08, 2019 11:40 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3045820
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 Dec 08, 2019 11:39 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Final question
- Replies: 1
- Views: 250
Final question
There was a question on the final in this section I think that asked what kind of compound some molecules were, what was it asking exactly?
- Sun Dec 08, 2019 11:36 pm
- Forum: Administrative Questions and Class Announcements
- Topic: curve
- Replies: 8
- Views: 619
Re: curve
Nare Arakelian Dis 3E wrote:I have been wondering this too. All I know is 250/500 is considered a C- and then I think he is just gonna wait to see how the final average comes out and figure out the curve then
Is it true that only people with a c or lower get affected by the curve?
- Sun Dec 01, 2019 8:08 pm
- Forum: General Science Questions
- Topic: test taking nervousness
- Replies: 19
- Views: 1029
Re: test taking nervousness
Savannah Mance 3B wrote:I think I have the concepts down pretty well from lecture and I do all of the homework problems. But, when I take the tests I kind of blank and I think it's because I get kind of nervous. Does anyone have any advice for that?
Don't drink too much coffee beforehand. Plus do practice problems.
- Sun Dec 01, 2019 8:07 pm
- Forum: Naming
- Topic: explain Coordination compound
- Replies: 5
- Views: 383
Re: explain Coordination compound
Coordination compounds form when neutral molecules or atoms (or anions) supply a central cation (usually a Tx metal) with an electron pair to form a coordinate covalent bond. These often form when Tx metals in solution first form complexes with water as the ligands, which are then replaced by more ...
- Sun Dec 01, 2019 8:06 pm
- Forum: Naming
- Topic: Final Exam?
- Replies: 20
- Views: 1076
Re: Final Exam?
The final exam is cumulative.
- Sun Dec 01, 2019 8:05 pm
- Forum: Naming
- Topic: Naming for the final
- Replies: 6
- Views: 465
Re: Naming for the final
check out page 723 of the textbook!! but naming goes: [greek prefix; ligand name(s, in alphabetical order); transition metal cation; Roman numeral] the brackets represent coordination sphere the greek prefix (di, tri, tetra, penta) refers ti how many of the ligand there is the ligands have the endi...
- Sun Dec 01, 2019 8:03 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination Number
- Replies: 4
- Views: 306
Coordination Number
Is the coordination number just the number of bonds on the central atom?
- Sun Dec 01, 2019 8:02 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligands
- Replies: 4
- Views: 393
Ligands
What does it mean when it's a chelating ligand?
- Sun Nov 24, 2019 8:40 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Advice for studying
- Replies: 92
- Views: 6542
Re: Advice for studying
Aside from the textbook problems and online video modules, I would recommend doing to the Step-Up sessions and the upcoming midterm review sessions if you feel that you study well with others around; it would be a good way to clarify and reinforce concepts. The online modules stopped at a certain p...
- Sun Nov 24, 2019 8:38 pm
- Forum: Hybridization
- Topic: Lone pairs
- Replies: 9
- Views: 553
Re: Lone pairs
The geometry of a molecule determines its hybridization. A molecule with 3 bonded atoms and one lone pair has tetrahedral geometry since it has 4 regions of electron density. This is why the molecule has a hybridization of sp 3 even though the molecule only has three bonding regions. Thanks, I was ...
- Sun Nov 24, 2019 8:37 pm
- Forum: Hybridization
- Topic: Counting for hybridization
- Replies: 2
- Views: 231
Counting for hybridization
Can I just count the bonds on an atom and determine the hybridization by making sure the exponents of the s and p add up to that number? I feel like that's what I did in high school, don't remember exactly though.
- Sun Nov 24, 2019 8:34 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Test 2
- Replies: 14
- Views: 735
Re: Test 2
Cassandra_1K wrote:Does anyone have any advice for remembering molecular shape?
I memorized the AX formula that went along with the shape.
- Sun Nov 24, 2019 8:32 pm
- Forum: Naming
- Topic: Oxidation Numbers
- Replies: 2
- Views: 223
Oxidation Numbers
What does knowing the oxidation numbers tell you?
- Sun Nov 17, 2019 10:40 pm
- Forum: Trends in The Periodic Table
- Topic: Trend for Polarizability
- Replies: 6
- Views: 623
Trend for Polarizability
What's the trend for polarizability?
- Sun Nov 17, 2019 10:36 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: This Week Test
- Replies: 12
- Views: 732
Re: This Week Test
605357751 wrote:Can someone tell me which section of hw problems will be on the test please.
I think it's 3F, 2E, 2F
- Sun Nov 17, 2019 10:31 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: equatorial v. axial
- Replies: 4
- Views: 263
Re: equatorial v. axial
What do equatorial and axial mean?
- Sun Nov 17, 2019 10:30 pm
- Forum: Hybridization
- Topic: Test 2
- Replies: 11
- Views: 546
Re: Test 2
Kendra Barreras 3E wrote:I believe Lavelle said in lecture on Friday that hybridization wouldn't be on the test.
Yeah it's not on the test but sigma and pi bonds will be on there I think.
- Sun Nov 10, 2019 10:53 pm
- Forum: General Science Questions
- Topic: Study Tips
- Replies: 13
- Views: 872
Re: Study Tips
TimVintsDis3C wrote:I would do the online modules and go through the problems assigned for homework. I believe all of the questions will be taken from there, so it's almost like an exact study guide.
Yeah this is probably the best way to study/learn material.
- Sun Nov 10, 2019 9:53 pm
- Forum: Student Social/Study Group
- Topic: Study Tips
- Replies: 58
- Views: 4354
Re: Study Tips
At the test bank do they only give you five minutes to find what you're looking for?
- Sun Nov 10, 2019 9:52 pm
- Forum: Ionic & Covalent Bonds
- Topic: Hydrogen Bond Strength
- Replies: 8
- Views: 461
Re: Hydrogen Bond Strength
Which elements does hydrogen form hydrogen bonds with?
- Sun Nov 10, 2019 9:50 pm
- Forum: Ionic & Covalent Bonds
- Topic: Electronegativity in between 1.5 and 2
- Replies: 2
- Views: 260
Electronegativity in between 1.5 and 2
What do you do if the electronegative difference is between 1.5 and 2?
- Sun Nov 10, 2019 9:49 pm
- Forum: Ionic & Covalent Bonds
- Topic: Solid v. Liquid v. Gas
- Replies: 8
- Views: 418
Solid v. Liquid v. Gas
How can you tell if a certain molecule is a solid, liquid, gas, or aqueous? I think Prof Lavelle went over it in a lecture but I didn't understand and know that it's related to bonding, if someone could just clarify?
- Sun Nov 10, 2019 9:47 pm
- Forum: Resonance Structures
- Topic: Resonance structures
- Replies: 15
- Views: 768
Re: Resonance structures
Follow Prof Lavelle's instructions from his lecture ppt and from there it's just practicing getting fast with identifying formal charges.
- Sun Nov 03, 2019 5:08 pm
- Forum: *Shrodinger Equation
- Topic: Calculating the probability of finding an electron at a certain location
- Replies: 5
- Views: 456
Re: Calculating the probability of finding an electron at a certain location
What's the difference between Heisenberg Uncertainty Principle and Shrodinger's? Is it cause Shrodinger deals with the wave function?
- Sun Nov 03, 2019 5:06 pm
- Forum: *Shrodinger Equation
- Topic: wavefunctions & orbitals relationship?
- Replies: 5
- Views: 279
Re: wavefunctions & orbitals relationship?
Due to the fact that orbitals act as waves, a wave function is a mathematical function that shows the wave-like behavior of electron(s) in an atom and the probable location to finding an electron in a specific region around the nucleus of an atom. Thanks! Shrodinger's eqn has a chance of being on t...
- Sun Nov 03, 2019 4:57 pm
- Forum: Photoelectric Effect
- Topic: Ionization Energy vs Threshold Energy
- Replies: 4
- Views: 310
Re: Ionization Energy vs Threshold Energy
Threshold energy and ionization energy both have to do with the minimum energy required to remove an electron from an element but threshold energy refers to the energy needed to remove an electron from a metal (photoelectric effect) while ionization energy has to do with the energy needed to remove...
- Sun Nov 03, 2019 4:56 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric effect [ENDORSED]
- Replies: 6
- Views: 1064
Re: Photoelectric effect [ENDORSED]
Camille 4I wrote:Where did you get the number 4.200x10^-19 from?
Yeah I don't get that either.
- Sun Nov 03, 2019 4:46 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Rydberg equation [ENDORSED]
- Replies: 73
- Views: 8741
Re: Rydberg equation [ENDORSED]
TimVintsDis3C wrote:Are all of these equations meant to be memorized, or will they be provided on tests?
Rydberg's constant is provided, but the eqn isn't. However, I think you can use E(lowercase n) = -hR/n^2 which is on the constants sheet.
- Sun Oct 27, 2019 4:42 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 384989
Re: Advice from a Medical Student [ENDORSED]
Thanks for the advice! Any tips for the midterm?
- Sun Oct 27, 2019 4:39 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Exceptions
- Replies: 2
- Views: 202
Exceptions
Can someone explain why Cr and Cu are exceptions?
- Sun Oct 27, 2019 4:37 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Rydberg equation [ENDORSED]
- Replies: 73
- Views: 8741
Re: Rydberg equation [ENDORSED]
Is there any problem where you would use Rydberg with another equation?
- Sun Oct 27, 2019 4:36 pm
- Forum: Student Social/Study Group
- Topic: Study Tips
- Replies: 58
- Views: 4354
Re: Study Tips
Find a lounge with a white board and work things out on there, it really helps to have everything larger and in front of you.
- Sun Oct 27, 2019 4:33 pm
- Forum: Properties of Light
- Topic: All the formulas
- Replies: 5
- Views: 194
All the formulas
Can someone put all the formulas that are related to each other in one post?
- Sun Oct 20, 2019 3:12 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Advice for studying
- Replies: 92
- Views: 6542
Re: Advice for studying
The online modules are pretty helpful, especially taking the post-assessment. The videos aren't too in depth about the harder questions but they cover the basics really well which helps.
- Sun Oct 20, 2019 3:11 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice on Homework
- Replies: 13
- Views: 1592
Re: Advice on Homework
At least look at all of the questions and their answers if you know you won't have time to physically do them all, because then at least you have some idea of what the test questions could look like.
- Sun Oct 20, 2019 3:09 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 384989
Re: Advice from a Medical Student [ENDORSED]
Thanks for the advice, because I'm not sure about the pre-med track so it's nice to hear from someone who has been through it.
- Sun Oct 20, 2019 3:07 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: how to prepare
- Replies: 22
- Views: 836
Re: how to prepare
Find a study room with a white board and find some people who are also in the class so you can talk it through and draw it out on the board, that's what helps me.
- Sun Oct 20, 2019 3:06 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Advice
- Replies: 6
- Views: 348
Re: Advice
Make a study group because it really helps to talk things out with others, especially the theoretical stuff we're doing right now with quantum numbers.
- Sun Oct 13, 2019 6:30 pm
- Forum: Properties of Light
- Topic: Atomic Spectra Pre-Assessment #13
- Replies: 1
- Views: 65
Atomic Spectra Pre-Assessment #13
What is the difference between absorption line and emission line spectrum?
- Sun Oct 13, 2019 6:28 pm
- Forum: Properties of Light
- Topic: Atomic Spectra Pre-Assessment #12
- Replies: 2
- Views: 119
Atomic Spectra Pre-Assessment #12
What is the experimental setup for a spectroscopic experiment?
- Sun Oct 13, 2019 6:23 pm
- Forum: Properties of Light
- Topic: Next test
- Replies: 23
- Views: 1044
Next test
Do we get all of the equations given to us on the next test?
- Sun Oct 13, 2019 6:21 pm
- Forum: Properties of Light
- Topic: Photoelectric Effect Pre-Assessment
- Replies: 1
- Views: 65
Photoelectric Effect Pre-Assessment
Can someone clarify number 19?
- Sun Oct 13, 2019 6:14 pm
- Forum: Properties of Light
- Topic: Photoelectric Effect
- Replies: 7
- Views: 335
Photoelectric Effect
Why does the experiment have to happen in a vacuum?
- Sun Oct 06, 2019 8:24 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Dilution and Molarity in general
- Replies: 1
- Views: 67
Dilution and Molarity in general
For these kinds of questions (like from section G), is it mainly just knowing how to manipulate the mv = mv equation?
- Sun Oct 06, 2019 8:21 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Homework G25
- Replies: 1
- Views: 67
Homework G25
I’m confused as to how to even start this question, I don’t think I’m understanding it correctly, is there any way for someone to explain it in easier terms?
- Fri Oct 04, 2019 7:45 am
- Forum: Molarity, Solutions, Dilutions
- Topic: Homework Question E9 Part A
- Replies: 1
- Views: 127
Homework Question E9 Part A
I wrote out the dimensional analysis as 5.15g / 246.37g*mol^-1 * 11 mol oxygen * 6.022e23 which I'm pretty sure is the correct way (maybe not?), but when I put it into my calculator it ends up being around 86 instead of 1.38e23 (I got this answer on my calc once but I don't know how). Am I just doin...
- Fri Oct 04, 2019 7:40 am
- Forum: Molarity, Solutions, Dilutions
- Topic: Homework Question G13
- Replies: 2
- Views: 134
Homework Question G13
Why do I have to multiply by the .100 L that is added to the diluted solution?
- Fri Oct 04, 2019 7:38 am
- Forum: Molarity, Solutions, Dilutions
- Topic: Homework Question H11
- Replies: 3
- Views: 155
Homework Question H11
I was having trouble balancing the second part of H11, where the Fe2O3 reacts with carbon monoxide to make iron and carbon dioxide, can someone tell me how it's supposed to be done?