Search found 32 matches
- Sun Dec 09, 2018 10:29 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Acid Rain
- Replies: 2
- Views: 519
Acid Rain
What was the equation for acid rain from SO2?
- Sun Dec 09, 2018 10:26 pm
- Forum: Properties of Light
- Topic: Snail velocity final problem
- Replies: 3
- Views: 5457
Re: Snail velocity final problem
I looked at this question for so long. Why a snail?
- Sun Dec 09, 2018 10:22 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: tetrahedral or square planar?
- Replies: 5
- Views: 919
Re: tetrahedral or square planar?
I believe it would be square planar is there are lone pairs
- Wed Nov 28, 2018 10:04 pm
- Forum: Hybridization
- Topic: Sulfur Trioxide Hybridization
- Replies: 4
- Views: 5224
Re: Sulfur Trioxide Hybridization
I would draw out the lewis structure in order to figure out the shape. The shape coordinates with the hybridization orbitals. steric #2= linear=sp steric #3= trigonal planar=sp2 steric #4= tetrahedral=sp3 steric #5= trigonal bipyramidal=sp3d steric #6= octahedral=sp3d2 They also coordinate with the ...
- Wed Nov 28, 2018 9:55 pm
- Forum: Lewis Structures
- Topic: Lewis structure of I3-
- Replies: 1
- Views: 564
Re: Lewis structure of I3-
I believe the reason why is because when you put the formal charge on the central atom, the outer Is have a formal charge of 0 which makes entire ion more stable. When drawing lewis structures, I usually start by counting all of the valence electrons including the -1 charge. So for I, the valence el...
- Wed Nov 28, 2018 9:44 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 7th edition 2E.1 mistake ?
- Replies: 6
- Views: 773
Re: 7th edition 2E.1 mistake ?
I was also confused by this problem. I think that you are correct, but I am not 100% sure. I would email a TA just to make sure.
- Tue Nov 20, 2018 1:35 pm
- Forum: Bond Lengths & Energies
- Topic: double bonds vs. single bonds
- Replies: 5
- Views: 937
Re: double bonds vs. single bonds
double bonds are more stable
- Tue Nov 20, 2018 1:33 pm
- Forum: Sigma & Pi Bonds
- Topic: sigma and pi bonds
- Replies: 5
- Views: 605
Re: sigma and pi bonds
the maximum number of sigma bonds is one and then every bond after is a pi bond
- Tue Nov 20, 2018 1:32 pm
- Forum: Hybridization
- Topic: Tips
- Replies: 2
- Views: 367
Re: Tips
If you count the amount of atoms and lone pairs surrounding the central atoms you will get the steric number.
# 2 = two sp orbitals
# 3 = three sp^3 orbitals
# 4 = four sp^3 orbitals
# 5 = five dsp^3 orbitals
# 6 = six d^2sp^3 orbitals
# 2 = two sp orbitals
# 3 = three sp^3 orbitals
# 4 = four sp^3 orbitals
# 5 = five dsp^3 orbitals
# 6 = six d^2sp^3 orbitals
- Tue Nov 20, 2018 1:27 pm
- Forum: Hybridization
- Topic: d Orbital
- Replies: 6
- Views: 591
Re: d Orbital
I don't think we will need to draw them, but it might be a good idea to look over what they look like.
- Tue Nov 20, 2018 1:26 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Memorization
- Replies: 4
- Views: 431
Re: Memorization
I'm assuming we will need to know the names of the shapes for both our test and the Final.
- Tue Nov 20, 2018 1:25 pm
- Forum: Lewis Structures
- Topic: Electronegativity
- Replies: 4
- Views: 449
Re: Electronegativity
It helps with the stability of the atom.
- Tue Nov 20, 2018 1:23 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond angles
- Replies: 4
- Views: 385
Re: Bond angles
This was really helpful thank you!
- Sun Nov 11, 2018 2:24 pm
- Forum: Limiting Reactant Calculations
- Topic: Chem Community Points
- Replies: 3
- Views: 707
Re: Chem Community Points
You have to post on a weekly basis. If you haven't been posting you wont get the points.
- Sun Nov 11, 2018 2:21 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR determining shape
- Replies: 3
- Views: 351
Re: VSEPR determining shape
Draw the Lewis structure, this will help you determine the shape.
- Sun Nov 11, 2018 2:19 pm
- Forum: Hybridization
- Topic: Final Grade
- Replies: 4
- Views: 479
Re: Final Grade
I would check the syllabus, but I don't think the class is curved.
- Mon Oct 29, 2018 8:39 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Exam
- Replies: 7
- Views: 939
Re: Exam
I believe the syllabus outlines what concepts will be on the exam.
- Mon Oct 29, 2018 8:24 pm
- Forum: Trends in The Periodic Table
- Topic: Coulombic potential energy
- Replies: 2
- Views: 463
Re: Coulombic potential energy
V=(kq1q2)/d
V=Potential Energy
k=Positive-valued proportionality constant
q1=charge on particle 1 (positive proton or negative electron)
q2=charge on particle 2 (positive proton or negative electron)
d=distance between particles
V=Potential Energy
k=Positive-valued proportionality constant
q1=charge on particle 1 (positive proton or negative electron)
q2=charge on particle 2 (positive proton or negative electron)
d=distance between particles
- Mon Oct 29, 2018 8:19 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Energy Levels
- Replies: 2
- Views: 433
Re: Energy Levels
When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.
- Thu Oct 25, 2018 9:54 pm
- Forum: *Black Body Radiation
- Topic: Black Body Radiation
- Replies: 4
- Views: 840
Re: Black Body Radiation
He said not to worry about black body.
- Thu Oct 25, 2018 9:53 pm
- Forum: Properties of Light
- Topic: Degenerate orbitals
- Replies: 2
- Views: 431
Re: Degenerate orbitals
I believe that the book is correct.
- Thu Oct 25, 2018 9:49 pm
- Forum: Einstein Equation
- Topic: De Broglie's
- Replies: 4
- Views: 901
Re: De Broglie's
I believe the problem will tell you which to use or it will give you the value.
- Fri Oct 19, 2018 6:55 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Quantum number song
- Replies: 1
- Views: 440
Re: Quantum number song
Thank you!
- Fri Oct 19, 2018 6:54 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Chem Community Due Date
- Replies: 6
- Views: 666
Re: Chem Community Due Date
I asked him and he said Sunday.
- Fri Oct 19, 2018 6:34 pm
- Forum: *Shrodinger Equation
- Topic: Schrodinger Equation
- Replies: 3
- Views: 1634
Re: Schrodinger Equation
I think he just wanted us to understand where the orbitals come from? I'm not completely sure.
- Tue Oct 09, 2018 11:03 pm
- Forum: Limiting Reactant Calculations
- Topic: Percent Yield [ENDORSED]
- Replies: 13
- Views: 2915
Re: Percent Yield [ENDORSED]
Usually you will be given the value for the actual yield because we are not in a lab course and then the value that you are calculating by using stoichometry is the theoretical yield.
- Tue Oct 09, 2018 11:01 pm
- Forum: Balancing Chemical Reactions
- Topic: Test 1
- Replies: 6
- Views: 2796
Re: Test 1
It also helps to write out the units so that you can make sure that everything will cancel so that you can end up with the correct units.
- Tue Oct 09, 2018 10:58 pm
- Forum: Balancing Chemical Reactions
- Topic: Review question L.35 in the 7th edition
- Replies: 1
- Views: 280
Re: Review question L.35 in the 7th edition
Thank you so much! I couldn't figure out what I was doing incorrectly.
- Wed Oct 03, 2018 6:52 pm
- Forum: Empirical & Molecular Formulas
- Topic: Question 22 on the post assessment for Empirical Formulas
- Replies: 2
- Views: 209
Re: Question 22 on the post assessment for Empirical Formulas
I completely forgot that they could be the same, thank you!
- Wed Oct 03, 2018 6:51 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Moles and Atomic Masses/Weights
- Replies: 4
- Views: 454
Re: Moles and Atomic Masses/Weights
This was confusing for me as well. I looked back at the lecture notes and I have written down that the mass of sample (g) = number of moles (mol)*molar mass of element (g*mol^-1). I'm not sure if that helps or not?
- Wed Oct 03, 2018 6:45 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: If we ever have to use dm^3
- Replies: 1
- Views: 198
Re: If we ever have to use dm^3
dm^3 is the same as 1000^3, so I believe you are correct.
- Wed Oct 03, 2018 6:43 pm
- Forum: Empirical & Molecular Formulas
- Topic: Question 22 on the post assessment for Empirical Formulas
- Replies: 2
- Views: 209
Question 22 on the post assessment for Empirical Formulas
I am confused as to why C5H12O5 would be the Molecular Formula. I thought that would be the Empirical Formula?