Search found 32 matches

by Michael Nirula
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: 4982

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 ...
by Michael Nirula
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: 4982

Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]

Can someone explain 21 aka why is the oxidation state in poryphorin +2?
by Michael Nirula
Wed Dec 05, 2018 9:54 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: HW for this week
Replies: 4
Views: 101

Re: HW for this week

Great thanks
by Michael Nirula
Wed Dec 05, 2018 1:27 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: HW for this week
Replies: 4
Views: 101

Re: HW for this week

My bad, that was supposed to be a question.
by Michael Nirula
Wed Dec 05, 2018 1:26 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: HW for this week
Replies: 4
Views: 101

HW for this week

So, for this week we are just doing 7 problems from either coordination compounds and acids and bases
by Michael Nirula
Thu Nov 29, 2018 2:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape
Replies: 2
Views: 78

Re: Molecular Shape

It is something you're expected to memorize
by Michael Nirula
Thu Nov 29, 2018 2:28 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: AX2E2
Replies: 14
Views: 247

Re: AX2E2

Yes, bent molecular geometry with bond angles less than 109.5
by Michael Nirula
Mon Nov 19, 2018 12:03 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Pi bonds and sigma bonds
Replies: 5
Views: 76

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
by Michael Nirula
Sun Nov 18, 2018 3:57 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular geometry vs Electron geometry
Replies: 6
Views: 146

Re: Molecular geometry vs Electron geometry

Ok great could someone explain how they are different?
by Michael Nirula
Sun Nov 18, 2018 3:50 pm
Forum: Administrative Questions and Class Announcements
Topic: Studying for finals tip
Replies: 2
Views: 122

Re: Studying for finals tip

Great thanks
by Michael Nirula
Sun Nov 18, 2018 3:48 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular geometry vs Electron geometry
Replies: 6
Views: 146

Molecular geometry vs Electron geometry

Will we have to know both the molecular geometry and electron geometry?
by Michael Nirula
Sun Nov 18, 2018 3:30 pm
Forum: Sigma & Pi Bonds
Topic: Calculating Amount of Sigma/Pi Bonds
Replies: 4
Views: 99

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.
by Michael Nirula
Sun Nov 11, 2018 4:06 pm
Forum: Properties of Light
Topic: Test 3
Replies: 24
Views: 498

Re: Test 3

@EstelleJung Yes, week 9 after Thanksgiving
by Michael Nirula
Tue Nov 06, 2018 5:44 pm
Forum: Octet Exceptions
Topic: Copper
Replies: 10
Views: 231

Re: Copper

^Yeah, Cu and Cr are exceptions
by Michael Nirula
Tue Nov 06, 2018 5:43 pm
Forum: Trends in The Periodic Table
Topic: Electronegativity vs. Electron Affinity?
Replies: 9
Views: 298

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.
by Michael Nirula
Tue Nov 06, 2018 5:34 pm
Forum: Lewis Structures
Topic: Lewis Structure for N2O
Replies: 7
Views: 137

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.
by Michael Nirula
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: 53

Re: Rank C,N,O,F on Ionization Energy

Ok great thanks
by Michael Nirula
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: 53

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?
by Michael Nirula
Sun Nov 04, 2018 12:40 pm
Forum: Bond Lengths & Energies
Topic: Bond order
Replies: 4
Views: 87

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.
by Michael Nirula
Sun Oct 28, 2018 8:43 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: px,py,pz???
Replies: 6
Views: 228

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.
by Michael Nirula
Sun Oct 28, 2018 8:11 pm
Forum: Administrative Questions and Class Announcements
Topic: Peer learning Sessions
Replies: 3
Views: 108

Re: Peer learning Sessions

Ok great thanks
by Michael Nirula
Sun Oct 28, 2018 5:53 pm
Forum: Administrative Questions and Class Announcements
Topic: Peer learning Sessions
Replies: 3
Views: 108

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.
by Michael Nirula
Sun Oct 21, 2018 9:15 pm
Forum: Administrative Questions and Class Announcements
Topic: How do the post hw points work
Replies: 5
Views: 140

Re: How do the post hw points work

Yeah, I think it is 3 Posts per week by the end of Sunday
by Michael Nirula
Sun Oct 21, 2018 7:12 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Shielding [ENDORSED]
Replies: 14
Views: 562

Re: Shielding [ENDORSED]

Ok great think I've got it thanks guys
by Michael Nirula
Fri Oct 19, 2018 10:19 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Shielding [ENDORSED]
Replies: 14
Views: 562

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...
by Michael Nirula
Wed Oct 10, 2018 1:03 am
Forum: Significant Figures
Topic: Calculators
Replies: 16
Views: 507

Re: Calculators

Ok cool thx
by Michael Nirula
Wed Oct 10, 2018 12:41 am
Forum: Significant Figures
Topic: Calculators
Replies: 16
Views: 507

Re: Calculators

Ok but for test 1 do this week do we not need one?
by Michael Nirula
Wed Oct 10, 2018 12:39 am
Forum: Significant Figures
Topic: Calculators
Replies: 16
Views: 507

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?
by Michael Nirula
Sun Oct 07, 2018 11:16 pm
Forum: Balancing Chemical Reactions
Topic: Post-Module Assessment typo?? - Balancing Chemical Reactions
Replies: 3
Views: 138

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.
by Michael Nirula
Sun Oct 07, 2018 11:03 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Avogadro's Constant Definition
Replies: 7
Views: 360

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.
by Michael Nirula
Sun Oct 07, 2018 10:53 pm
Forum: Molarity, Solutions, Dilutions
Topic: Actual/Theoretical Yield
Replies: 8
Views: 754

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.

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