Search found 32 matches
- Sun Dec 09, 2018 1:06 am
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 21481
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
Wait so regarding #21/the Porphyrin question does that mean Fe is not covalently bonded to the Ns. Why I'm still confused is that it looks like there are 2 Ns with 3 covalent bonds and one pair and 2 Ns with a double bond, single bond and a lone pair so in that case the overall formal charge of the ...
- Sat Dec 08, 2018 6:54 pm
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 21481
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
Can someone explain 21 aka why is the oxidation state in poryphorin +2?
- Wed Dec 05, 2018 9:54 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: HW for this week
- Replies: 4
- Views: 462
Re: HW for this week
Great thanks
- Wed Dec 05, 2018 1:27 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: HW for this week
- Replies: 4
- Views: 462
Re: HW for this week
My bad, that was supposed to be a question.
- Wed Dec 05, 2018 1:26 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: HW for this week
- Replies: 4
- Views: 462
HW for this week
So, for this week we are just doing 7 problems from either coordination compounds and acids and bases
- Thu Nov 29, 2018 2:31 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular Shape
- Replies: 2
- Views: 305
Re: Molecular Shape
It is something you're expected to memorize
- Thu Nov 29, 2018 2:28 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: AX2E2
- Replies: 14
- Views: 4586
Re: AX2E2
Yes, bent molecular geometry with bond angles less than 109.5
- Thu Nov 29, 2018 1:37 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular geometry vs Electron geometry
- Replies: 6
- Views: 745
Re: Molecular geometry vs Electron geometry
@timothyho thanks got it
- Mon Nov 19, 2018 12:03 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Pi bonds and sigma bonds
- Replies: 5
- Views: 498
Re: Pi bonds and sigma bonds
If don't know if this is what you're asking, but when you draw more bonds, the bonds are shorter and the bonds are stronger
- Sun Nov 18, 2018 3:57 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular geometry vs Electron geometry
- Replies: 6
- Views: 745
Re: Molecular geometry vs Electron geometry
Ok great could someone explain how they are different?
- Sun Nov 18, 2018 3:50 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Studying for finals tip
- Replies: 2
- Views: 472
Re: Studying for finals tip
Great thanks
- Sun Nov 18, 2018 3:48 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular geometry vs Electron geometry
- Replies: 6
- Views: 745
Molecular geometry vs Electron geometry
Will we have to know both the molecular geometry and electron geometry?
- Sun Nov 18, 2018 3:30 pm
- Forum: Sigma & Pi Bonds
- Topic: Calculating Amount of Sigma/Pi Bonds
- Replies: 4
- Views: 501
Re: Calculating Amount of Sigma/Pi Bonds
Yeah I think you would just look at the bonds so N2 which has a triple bond has one sigma bond and 2 pi bonds.
- Sun Nov 11, 2018 4:06 pm
- Forum: Properties of Light
- Topic: Test 3
- Replies: 24
- Views: 2219
Re: Test 3
@EstelleJung Yes, week 9 after Thanksgiving
- Tue Nov 06, 2018 5:44 pm
- Forum: Octet Exceptions
- Topic: Copper
- Replies: 10
- Views: 985
Re: Copper
^Yeah, Cu and Cr are exceptions
- Tue Nov 06, 2018 5:43 pm
- Forum: Trends in The Periodic Table
- Topic: Electronegativity vs. Electron Affinity?
- Replies: 11
- Views: 1714
Re: Electronegativity vs. Electron Affinity?
Electronegativity is more conceptual because it refers to how well an element attracts an electron, but electron affinity is an actual value of the energy released when an electron is added.
- Tue Nov 06, 2018 5:34 pm
- Forum: Lewis Structures
- Topic: Lewis Structure for N2O
- Replies: 7
- Views: 1260
Re: Lewis Structure for N2O
I think people are confused because N has a higher ionization energy than O, but O is still more electronegative than N.
- Sun Nov 04, 2018 1:32 pm
- Forum: Trends in The Periodic Table
- Topic: Rank C,N,O,F on Ionization Energy
- Replies: 2
- Views: 365
Re: Rank C,N,O,F on Ionization Energy
Ok great thanks
- Sun Nov 04, 2018 12:48 pm
- Forum: Trends in The Periodic Table
- Topic: Rank C,N,O,F on Ionization Energy
- Replies: 2
- Views: 365
Rank C,N,O,F on Ionization Energy
Yesterday in the peer review we ranked C,N,O and F on ionization energies and I remember the ranking was an exception to the usual rule of ionization energies increasing across the period. Can someone explain this?
- Sun Nov 04, 2018 12:40 pm
- Forum: Bond Lengths & Energies
- Topic: Bond order
- Replies: 4
- Views: 497
Re: Bond order
I actually think bond order is just based on the number of bonds between two atoms so F2 which has a single bond has a bond order of 1, O2 which has a double bond has a bond order of 2 and N2 which has a triple bond has a bond order of 3.
- Sun Oct 28, 2018 8:43 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: px,py,pz???
- Replies: 6
- Views: 2203
Re: px,py,pz???
Yeah, I don't think the x, y, z has to be specified specifically. BTW, they simply refer to the different axis that the p-orbitals are on, so one is on the x-axis. another is on a y-axis and the last one is on a z-axis.
- Sun Oct 28, 2018 8:11 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Peer learning Sessions
- Replies: 3
- Views: 435
Re: Peer learning Sessions
Ok great thanks
- Sun Oct 28, 2018 5:53 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Peer learning Sessions
- Replies: 3
- Views: 435
Peer learning Sessions
What are peer learning sessions/how do they work? I remember it being brought up after class and have heard from a few people that they are helpful.
- Sun Oct 21, 2018 9:15 pm
- Forum: Administrative Questions and Class Announcements
- Topic: How do the post hw points work
- Replies: 5
- Views: 574
Re: How do the post hw points work
Yeah, I think it is 3 Posts per week by the end of Sunday
- Sun Oct 21, 2018 7:12 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Shielding [ENDORSED]
- Replies: 15
- Views: 2155
Re: Shielding [ENDORSED]
Ok great think I've got it thanks guys
- Fri Oct 19, 2018 10:19 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Shielding [ENDORSED]
- Replies: 15
- Views: 2155
Shielding [ENDORSED]
Because the 2S and 2P orbitals both have the quantum # n=2, I thought that these orbitals were the same distance from the nucleus, but I believe Prof. Lavelle mentioned today that the 2P orbital experiences shielding from the 2S orbital. Is this true/does the 2P orbital experience shielding from the...
- Wed Oct 10, 2018 1:03 am
- Forum: Significant Figures
- Topic: Calculators
- Replies: 20
- Views: 1947
Re: Calculators
Ok cool thx
- Wed Oct 10, 2018 12:41 am
- Forum: Significant Figures
- Topic: Calculators
- Replies: 20
- Views: 1947
Re: Calculators
Ok but for test 1 do this week do we not need one?
- Wed Oct 10, 2018 12:39 am
- Forum: Significant Figures
- Topic: Calculators
- Replies: 20
- Views: 1947
Calculators
I brought my TI-84 to college, but those can't be used on tests so do I need to buy a new calculator for the test or are they provided?
- Sun Oct 07, 2018 11:16 pm
- Forum: Balancing Chemical Reactions
- Topic: Post-Module Assessment typo?? - Balancing Chemical Reactions
- Replies: 3
- Views: 438
Re: Post-Module Assessment typo?? - Balancing Chemical Reactions
Prof. Lavelle mentioned that balancing rxns is just like solving math equations so if you left your answer as is it would be like saying 2x=2 when you really should simplify to x=1 if that makes sense.
- Sun Oct 07, 2018 11:03 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Avogadro's Constant Definition
- Replies: 7
- Views: 1063
Re: Avogadro's Constant Definition
@804994652 Answering your question, those questions should be asking "how many molecules of Cl2" because Cl2 is a molecule not a singular atom. But, maybe if they were asking about how many atoms are in Cl2, you would answer 2 in that case.
- Sun Oct 07, 2018 10:53 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Actual/Theoretical Yield
- Replies: 8
- Views: 4302
Re: Actual/Theoretical Yield
Yeah, I doubt you would need to know it on a case specific basis. But, it may be good to be able to describe some reasons off the top of your head so Reactant sticking to the container, instrumental errors, side rxns, etc.