Search found 52 matches
- Mon Dec 09, 2019 12:21 am
- Forum: Administrative Questions and Class Announcements
- Topic: Curving in Chem 14A
- Replies: 7
- Views: 562
Re: Curving in Chem 14A
So does anyone have an idea what the scale may be for each letter grade since a 50% is a C-?
- Mon Dec 09, 2019 12:17 am
- Forum: Administrative Questions and Class Announcements
- Topic: Final Grades [ENDORSED]
- Replies: 2
- Views: 322
Re: Final Grades [ENDORSED]
Do the cut-offs vary alot to the regular scale?
- Sat Dec 07, 2019 10:19 pm
- Forum: Polyprotic Acids & Bases
- Topic: Polyprotic
- Replies: 6
- Views: 538
Re: Polyprotic
On the outline posted for Acid and Bases and Structures Properties, one of the focus says mentions Box 6E.1. Are we supposed to memorize these values?
- Sat Dec 07, 2019 9:33 pm
- Forum: Identifying Acidic & Basic Salts
- Topic: Acidic Rain
- Replies: 3
- Views: 362
Re: Acidic Rain
what would be the net equation of this process?
- Sat Dec 07, 2019 9:31 pm
- Forum: Identifying Acidic & Basic Salts
- Topic: Hw Problem 6D.11
- Replies: 4
- Views: 385
Re: Hw Problem 6D.11
what is the complete list of strong acids?
- Sat Dec 07, 2019 7:03 pm
- Forum: Naming
- Topic: -ate, -ide, -ite, -o
- Replies: 3
- Views: 282
-ate, -ide, -ite, -o
When naming coordination compounds when do use the first three suffix (-ate, -ide, -ite) and when do you use -o?
I would appreciate if there was example provided!
I would appreciate if there was example provided!
- Sun Dec 01, 2019 8:18 pm
- Forum: Naming
- Topic: Final Exam?
- Replies: 20
- Views: 1056
Re: Final Exam?
Has he announced any review sessions for the final?
- Sun Dec 01, 2019 8:15 pm
- Forum: Naming
- Topic: Naming Coordination Compounds
- Replies: 3
- Views: 353
Re: Naming Coordination Compounds
When we are naming coordinate compounds are we supposed to memorize the chart that professor Lavelle has in the website?
- Sun Dec 01, 2019 8:11 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: structure of water
- Replies: 4
- Views: 224
Re: structure of water
can someone explain why water acts like bronsted acid and a base?
- Sun Dec 01, 2019 8:02 pm
- Forum: Naming
- Topic: Naming Order
- Replies: 5
- Views: 340
Re: Naming Order
I am not sure by what it meant that when a ligand name is with DI-, TRI-, TETRA, or polydentate, we should have different prefixes such as bis, tris, tetrakis, and pentakis. Are there any examples with these prefixes?
- Sun Dec 01, 2019 7:17 pm
- Forum: Naming
- Topic: Roman Numeral
- Replies: 13
- Views: 854
Re: Roman Numeral
How do you calculate the oxidation number of the metal in a complex?
- Mon Nov 25, 2019 1:10 pm
- Forum: *Molecular Orbital Theory Applied To Transition Metals
- Topic: Ligands
- Replies: 5
- Views: 916
Re: Ligands
Can a ligand be a whole compound attached to a TM?
- Fri Nov 22, 2019 11:47 am
- Forum: Administrative Questions and Class Announcements
- Topic: Final Studying
- Replies: 14
- Views: 858
Re: Final Studying
Does anyone know if professor Lavelle has sent out the dates for reviews session for the final?
- Fri Nov 22, 2019 11:42 am
- Forum: Student Social/Study Group
- Topic: Study Tips
- Replies: 58
- Views: 4295
Re: Study Tips
I know that watching videos might not always replace other study methods but I would recommend watching Professor Dave Explains on Youtube. This channel is very helpful, topics may be oversimplified sometimes but its a good start.
- Fri Nov 22, 2019 11:38 am
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student - Part II [ENDORSED]
- Replies: 298
- Views: 244818
Re: Advice from a Medical Student - Part II [ENDORSED]
I find your story very interesting and inspiring but as I think more of my future I have become interested in Forensic pathology so I was wondering if you knew about any resources I look into so that I can get more involved and become more knowledgeable of the field?I would appreciate it if you did ...
- Fri Nov 22, 2019 11:32 am
- Forum: Student Social/Study Group
- Topic: Final Jitters
- Replies: 457
- Views: 333906
Re: Final Jitters
Give yourself enough study time before the final, and therefore before the final just remember how much you studied for it. Taking deep breathes helps calm me down, get enough sleep and you will feel more confident before the final and after it.
- Fri Nov 15, 2019 10:28 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: Test Topics
- Replies: 11
- Views: 717
Re: Test Topics
There really is not a week to week schedule to follow, its better to look at the syllabus and study any material after 2D for the test, so basically anything after the midterm. This excludes hybridization
- Fri Nov 15, 2019 10:25 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: Intermolecular forces
- Replies: 10
- Views: 647
Re: Intermolecular forces
can anyone explain why professor Lavelle preferred to London dispersion force to be called Induced Dipole- Induced Dipole?
- Fri Nov 15, 2019 10:22 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: Test Topics
- Replies: 11
- Views: 717
Re: Test Topics
Victor James 4I wrote:VSPR info as in bond angles and the names of the formation?
yes I believe that is correct!
- Fri Nov 15, 2019 10:17 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: How to tell polar or non polar from lewis structure?
- Replies: 9
- Views: 678
Re: How to tell polar or non polar from lewis structure?
Are going to have to determine on whether a molecule is polar or not?
- Fri Nov 15, 2019 10:16 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: test 2
- Replies: 13
- Views: 648
Re: test 2
What are other topics other than the VSEPR models we should know for test two? or is only that?
- Sun Nov 10, 2019 9:56 pm
- Forum: Bond Lengths & Energies
- Topic: Test 2 Topics
- Replies: 40
- Views: 2051
Re: Test 2 Topics
what was the last topic we covered for the midterm?
- Sun Nov 10, 2019 9:54 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: How to Draw Dipole Arrows
- Replies: 8
- Views: 2654
Re: How to Draw Dipole Arrows
If the dipole moments always point toward the more electronegative atom is this why the arrow drawn from positive to negative?
- Sun Nov 10, 2019 9:51 pm
- Forum: Bond Lengths & Energies
- Topic: how to determine the energy of a bond
- Replies: 6
- Views: 541
Re: how to determine the energy of a bond
I am confused by what formal energy is? is that formal charge?
- Sun Nov 10, 2019 9:47 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: Test 2
- Replies: 6
- Views: 349
Re: Test 2
Is test 2 week 8?
- Sun Nov 10, 2019 11:22 am
- Forum: Sigma & Pi Bonds
- Topic: Triple bond?
- Replies: 18
- Views: 1652
Re: Triple bond?
Does this also apply for bonding in DNA?
- Sun Nov 03, 2019 1:03 am
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Polarizable vs Polarizing
- Replies: 6
- Views: 270
Re: Polarizable vs Polarizing
I am still unsure of what covalent character means, can anyone explain?
- Sun Nov 03, 2019 1:58 am
- Forum: Formal Charge and Oxidation Numbers
- Topic: When to calculate formal charge
- Replies: 7
- Views: 336
Re: When to calculate formal charge
When determining the most stable structure do you choose the Lewis structure with the least formal charges on each atom?
- Sun Nov 03, 2019 1:55 am
- Forum: Lewis Structures
- Topic: Midterm Topics
- Replies: 8
- Views: 217
Re: Midterm Topics
I believe the midterm is up everything up to section 2.D
- Sun Nov 03, 2019 1:52 am
- Forum: Coordinate Covalent Bonds
- Topic: Coordinate covalent bond?
- Replies: 12
- Views: 1332
Re: Coordinate covalent bond?
I know understand what a coordinate covalent bond is but, how did you know what compound was a base or an acid?
- Sun Nov 03, 2019 1:47 am
- Forum: Resonance Structures
- Topic: Resonance structure
- Replies: 4
- Views: 184
Re: Resonance structure
how do you figure out how many resonance structures you should have for a compound?
- Sun Nov 03, 2019 1:45 am
- Forum: Lewis Structures
- Topic: BF3
- Replies: 3
- Views: 180
Re: BF3
In order to fin the Lewis structure of BF3 we need to know the valence electron of both Boron and Fluorine which is 3 and 7 valence electrons respectively (you can figure this out by using the periodic table). With this we know that all three F has only one unpaired electron which will bong with the...
- Fri Oct 25, 2019 12:29 am
- Forum: Student Social/Study Group
- Topic: Midterm
- Replies: 17
- Views: 809
Re: Midterm
Also does anyone know if Lavelle has posted any possible dates for the midterm review session?
- Fri Oct 25, 2019 12:27 am
- Forum: Ionic & Covalent Bonds
- Topic: Electron Affinity
- Replies: 5
- Views: 282
Re: Electron Affinity
Why does electron affinity increase as we go towards the noble gasses?
- Fri Oct 25, 2019 12:18 am
- Forum: Bond Lengths & Energies
- Topic: Bond lengths
- Replies: 15
- Views: 986
Re: Bond lengths
would the bond length vary when it is a double or triple bond?
- Fri Oct 25, 2019 12:16 am
- Forum: Octet Exceptions
- Topic: Electron Configurations
- Replies: 3
- Views: 186
Re: Electron Configurations
why is the electronic configuration of Ag [Kr] 5s^1 4d^10 instead of [Kr] 5s^2 4d^9?
- Thu Oct 24, 2019 11:09 pm
- Forum: Resonance Structures
- Topic: Bond Lengths
- Replies: 3
- Views: 534
Re: Bond Lengths
When we are asked to draw resonance structures are we supposed to calculate the average bond length?
- Sun Oct 20, 2019 6:22 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Nodal planes
- Replies: 3
- Views: 86
Re: Nodal planes
They are regions around atomic nuclei where the likelihood of finding electrons is zero.
- Sun Oct 20, 2019 6:07 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configuration Exceptions
- Replies: 5
- Views: 284
Re: Electron Configuration Exceptions
What is the partial full one you are referring to in these exceptions?
- Thu Oct 17, 2019 12:42 pm
- Forum: DeBroglie Equation
- Topic: De Broglie's Equation
- Replies: 17
- Views: 547
Re: De Broglie's Equation
What is the difference between λ=h/p and c= λ*ν
- Thu Oct 17, 2019 12:36 pm
- Forum: Properties of Light
- Topic: Rydberg's Equation [ENDORSED]
- Replies: 4
- Views: 188
Re: Rydberg's Equation [ENDORSED]
Can someone explain why Lavelle preferred us to us this equation, (E = -hR/n^2), instead of Rydbergs equation?
- Thu Oct 17, 2019 12:33 pm
- Forum: DeBroglie Equation
- Topic: Constant Question
- Replies: 7
- Views: 309
Re: Constant Question
Usually just use the constant they give in the equation sheet, which I believe is usually 6.626*10^-34 J*s. Rounding up sometimes can eventually lead your answer to be slightly off from the real answer, so it is better to be more precise with your constants.
- Sat Oct 12, 2019 11:24 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2988400
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!
- Sat Oct 12, 2019 11:10 pm
- Forum: DeBroglie Equation
- Topic: De Broglie's Equation
- Replies: 13
- Views: 476
Re: De Broglie's Equation
Can someone explain the difference between the De Broglie's and Heisenberg's equation?
- Sat Oct 12, 2019 11:02 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect and Photons
- Replies: 6
- Views: 236
Re: Photoelectric Effect and Photons
A photon is a basic unit of light, when it hits a metal and meets the threshold, an electron will be emitted.
- Sat Oct 12, 2019 9:52 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2988400
Re: Post All Chemistry Jokes Here
Enjoy!
Oxygen, hydrogen, sulfur, sodium, and phosphorous walk into a bar.
“OH SNaP!” says the bartender.
Oxygen, hydrogen, sulfur, sodium, and phosphorous walk into a bar.
“OH SNaP!” says the bartender.
- Sat Oct 12, 2019 9:38 am
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Test 1 [ENDORSED]
- Replies: 107
- Views: 17474
Re: Test 1 [ENDORSED]
Does anyone know when we will be getting the first test back?
- Thu Oct 03, 2019 11:54 pm
- Forum: Properties of Light
- Topic: Spectroscopy
- Replies: 4
- Views: 190
Re: Spectroscopy
How can we figure out what type of light has a shorter/longer frequency? Is there a chart or acronym for this?
- Thu Oct 03, 2019 11:44 pm
- Forum: Significant Figures
- Topic: When to round for sig figs?
- Replies: 12
- Views: 477
Re: When to round for sig figs?
I undertand we have to round till the end so that we get more accurate numbers but, if there multiple parts to a problem, for example where you have to find moles, mass, etc, in the same problem, should i just write down exact numbers?
- Wed Oct 02, 2019 3:39 pm
- Forum: Properties of Light
- Topic: Angstrom Unit [ENDORSED]
- Replies: 2
- Views: 204
Angstrom Unit [ENDORSED]
Can someone explain what was the significance of the Angstrom unit from lecture?
- Wed Oct 02, 2019 3:23 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Moles
- Replies: 5
- Views: 268
Re: Moles
First you would have to convert 25.2 kg to grams, and then convert grams to moles.
Second use stoichiometry to find the amount of moles multiplied by 6 which will tell you the amount of F ions
25.2 kg * 1000g/1 kg* 1 mol UF6/Molar Mass UF6 * 6 mol F- ions/1 mol UF6
Second use stoichiometry to find the amount of moles multiplied by 6 which will tell you the amount of F ions
25.2 kg * 1000g/1 kg* 1 mol UF6/Molar Mass UF6 * 6 mol F- ions/1 mol UF6
- Wed Oct 02, 2019 3:14 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Balancing Equations [ENDORSED]
- Replies: 25
- Views: 1961
Re: Balancing Equations [ENDORSED]
When balancing equations how do you determine what to balance first?