Search found 31 matches
- Sat Dec 08, 2018 3:16 pm
- Forum: Conjugate Acids & Bases
- Topic: Strong acids and bases to memorize
- Replies: 9
- Views: 1548
Re: Strong acids and bases to memorize
Is there a list to memorize for strong bases?
- Sat Dec 08, 2018 3:12 pm
- Forum: Air Pollution & Acid Rain
- Topic: Acid Rain Damage [ENDORSED]
- Replies: 5
- Views: 1740
Re: Acid Rain Damage [ENDORSED]
Do we think that there are going to be question on the final regarding the chemical makeup and chemical reactions that take place during the formation of acid rain?
- Wed Dec 05, 2018 8:34 pm
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 21526
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
Thank you!! Your sessions and review problems are always so helpful!!
- Wed Dec 05, 2018 9:42 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: AX2E2
- Replies: 14
- Views: 4588
Re: AX2E2
what would make the bond angles equal to 109.5? or are they always less than it?
- Wed Dec 05, 2018 9:40 am
- Forum: Naming
- Topic: naming differences
- Replies: 6
- Views: 637
Re: naming differences
When do we use bis-, tris- etc. vs di- tri-, etc?
- Wed Dec 05, 2018 9:38 am
- Forum: Lewis Acids & Bases
- Topic: Lewis Acids and Bronstead Acids
- Replies: 1
- Views: 284
Lewis Acids and Bronstead Acids
What's the difference between a Lewis Acid and a Bronstead acid? I'm actually really confused.
- Sun Nov 25, 2018 8:12 pm
- Forum: Hybridization
- Topic: Hybridization
- Replies: 5
- Views: 575
Re: Hybridization
Yes, I believe we only need to know up to that amount. I would only assume this because no problems that we covered in class or in the homework have gone above it.
- Sun Nov 25, 2018 8:09 pm
- Forum: Hybridization
- Topic: Test 3
- Replies: 13
- Views: 921
Re: Test 3
When it says "3.12 and onward", what topics does that include? I'm assuming hybridization and things of that nature?
- Mon Nov 12, 2018 4:57 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic Bonds with Covalent Character
- Replies: 3
- Views: 447
Re: Ionic Bonds with Covalent Character
They are less soluble in water because the covalent bonds are holding the atoms together stronger than with the other type of bond. It takes more to break apart the covalent bond.
- Mon Nov 12, 2018 4:55 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: Dipoles and Electronegativity
- Replies: 4
- Views: 605
Re: Dipoles and Electronegativity
What happens if the atoms are very close in electronegativity? Then is the dipole moment very small?
- Mon Nov 12, 2018 4:53 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular Shape
- Replies: 6
- Views: 850
Re: Molecular Shape
I'm still a bit lost.. What's the difference between dotted lines and a solid line? I thought that they were both notations for interactions?
- Sun Nov 04, 2018 8:02 pm
- Forum: Ionic & Covalent Bonds
- Topic: Chem Midterm
- Replies: 13
- Views: 1183
Re: Chem Midterm
Do you guys know how many points total you can get taken off of the midterm if you miss sig figs and units, but get all of the math/concepts right?
- Sun Nov 04, 2018 7:59 pm
- Forum: Lewis Structures
- Topic: Expanded Octet
- Replies: 4
- Views: 505
Re: Expanded Octet
The atom that is in row three or below is able to form an expanded octet!
- Sun Nov 04, 2018 7:57 pm
- Forum: Electronegativity
- Topic: Electronegativity vs. Ionization Energy
- Replies: 3
- Views: 372
Re: Electronegativity vs. Ionization Energy
Does it work so that the same trends for electronegativity also apply for ionization energy and electron affinity?
- Sun Oct 28, 2018 10:12 pm
- Forum: Electronegativity
- Topic: Test 3. Question 7.
- Replies: 6
- Views: 1071
Re: Test 3. Question 7.
The difference in the electro negativity defines the ionic character !!
- Sun Oct 28, 2018 10:11 pm
- Forum: Ionic & Covalent Bonds
- Topic: the Octet rule
- Replies: 21
- Views: 4141
Re: the Octet rule
Yes they always follow the octet rule! Except for hydrogen. That only gets two electrons
- Sun Oct 28, 2018 10:10 pm
- Forum: Lewis Structures
- Topic: Dots in Lewis Stucture
- Replies: 14
- Views: 1245
Re: Dots in Lewis Stucture
I would say that it doesn’t matter,yet. I would say place one dot on each side before you add a second dot to the side.
- Sun Oct 21, 2018 4:29 pm
- Forum: Photoelectric Effect
- Topic: Test #2
- Replies: 9
- Views: 970
Re: Test #2
Hi! I've heard that test two is only going to be on the things that we have learned in lecture. However, I'd prepare just in case because you never know when a curveball will be thrown!
- Sun Oct 21, 2018 4:28 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: shells
- Replies: 2
- Views: 329
Re: shells
Like stated above, Dr. Lavelle said that that was beyond what is required to be known for exam day. You do, however, need to know how to apply x,y, and z to the topic!
- Sun Oct 21, 2018 4:25 pm
- Forum: Properties of Light
- Topic: Test 2
- Replies: 7
- Views: 626
Re: Test 2
Do we know if the test will be in a similar format to test one (same number of questions and all free response)?
- Wed Oct 17, 2018 2:53 pm
- Forum: *Shrodinger Equation
- Topic: Test 2
- Replies: 5
- Views: 727
Test 2
On Dr. Lavelle's website, he has outlines for each section that covers the content that we should know for the tests in detail. What outlines does test two cover? I'm trying to get ahead in my studying!
- Sun Oct 14, 2018 6:03 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Solving for frequency
- Replies: 3
- Views: 401
Re: Solving for frequency
Hz and S-1 are both units of frequency, but in almost every additional example that I have come across, the frequency has been measured in Hz. Would an equivalent in both be acceptable?
- Sun Oct 14, 2018 6:01 pm
- Forum: DeBroglie Equation
- Topic: De Broglie Equation Example
- Replies: 4
- Views: 464
Re: De Broglie Equation Example
What would be an example of something that does have measurable wavelength properties? I know Dr. Lavelle mentioned something in class about a baseball, but that is not really applicable to this class's content.
- Sun Oct 14, 2018 5:58 pm
- Forum: Properties of Electrons
- Topic: Wave Length Calculations
- Replies: 5
- Views: 406
Re: Wave Length Calculations
I think it's crazy that any wavelength smaller than 10^-18 is just a theory. For me, it is hard to grasp the concept that 10^-18 is measurable, but just .000001 smaller than that number is not considered measurable. What is the defining line for measurable vs. non-measurable.
- Thu Oct 11, 2018 1:34 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 152353
Re: Reading the textbook
I read the textbook after a lecture when I don't fully understand the topic while discussed in class. While the book uses some different symbols/terms than in lecture, I find that reading the book explains the material in an alternate fashion, which sometimes helps. However, I always go on Dr. Lavel...
- Thu Oct 11, 2018 1:29 pm
- Forum: Properties of Light
- Topic: Wavelength
- Replies: 10
- Views: 508
Re: Wavelength
Hi! Just make sure that when you do the conversions that all of the measurements are in the same units. If not, the answer will be wrong. In terms of the final answer, i've read to put them in meters, unless otherwise stated in the problem!
- Tue Oct 09, 2018 11:12 pm
- Forum: Limiting Reactant Calculations
- Topic: How to determine the limiting reactant???? [ENDORSED]
- Replies: 8
- Views: 12327
How to determine the limiting reactant???? [ENDORSED]
Hi guys! So in reviewing for the first test, I have found myself stuck on trying to determine the limiting reactant. I have tried numerous times attempting what Dr. Lavelle did in class to determine it, but it just isn't clicking. Does anyone have any advice??
- Thu Oct 04, 2018 9:26 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Homework Problem E.21, 6th Edition
- Replies: 1
- Views: 178
Homework Problem E.21, 6th Edition
Hi guys, so as I work through problem E.21 part B, i realize that there is a number in scientific notation that seems off to me. It is 25.92x10^-3.. I thought when you are in scientific notation that there is only supposed to be one figure before the decimal place? Please help!
- Tue Oct 02, 2018 6:39 pm
- Forum: General Science Questions
- Topic: Rusty on High School Chem [ENDORSED]
- Replies: 347
- Views: 444463
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 mas...
- Tue Oct 02, 2018 6:32 pm
- Forum: SI Units, Unit Conversions
- Topic: Formula Units: Molecules or Atoms
- Replies: 5
- Views: 480
Re: Formula Units: Molecules or Atoms
In the converting process, when/where do you use Avogadro's Number? I know the general steps in this process, but get quite confused when it is time to divide/multiple by it.
- Tue Oct 02, 2018 3:08 pm
- Forum: Significant Figures
- Topic: Rules For Significant Figures
- Replies: 6
- Views: 921
Re: Rules For Significant Figures
There was one thing that Dr. Lavelle mentioned in class that really helped me understand how to determine how many significant figures are present in a number. If you are unsure on the amount of significant figures in a number, convert the number into scientific notation. The number of didgets in th...