## Search found 32 matches

Sun Dec 09, 2018 10:29 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Acid Rain
Replies: 2
Views: 295

### 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: 2227

### 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: 560

### 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: 2562

### 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: 110

### 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: 306

### 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: 237

### 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: 237

### 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: 149

### 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
Tue Nov 20, 2018 1:27 pm
Forum: Hybridization
Topic: d Orbital
Replies: 6
Views: 168

### 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: 167

### 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: 205

### 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: 144

### 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: 381

### 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: 130

### Re: VSEPR determining shape

Sun Nov 11, 2018 2:19 pm
Forum: Hybridization
Replies: 4
Views: 188

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: 455

### 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: 157

### 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
Mon Oct 29, 2018 8:19 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Energy Levels
Replies: 2
Views: 172

### 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
Replies: 4
Views: 512

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: 181

### 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: 491

### 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: 161

### 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: 276

### 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: 322

### 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: 1874

### 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: 2595

### 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: 157

### 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: 110

### 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: 194

### 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: 105

### 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: 110

### 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?