Search found 38 matches
- Fri Nov 15, 2019 10:27 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: Intermolecular forces
- Replies: 10
- Views: 638
Re: Intermolecular forces
On the exams do we need to use those terms (induced dipole) or should we just say London Forces?
- Fri Nov 15, 2019 10:26 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: regions of electron density
- Replies: 7
- Views: 511
Re: regions of electron density
So this means that electron density is a term referring to any charge away from zero?
- Fri Nov 15, 2019 10:24 pm
- Forum: DeBroglie Equation
- Topic: De Broglie Wavelength
- Replies: 23
- Views: 3242
Re: De Broglie Wavelength
I think the short and direct answer to this question is no, the question will not always say De Broglie in it. You need to know the components of the equation to know when to use it.
- Fri Nov 15, 2019 10:23 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: Test Topics
- Replies: 11
- Views: 698
Re: Test Topics
Wait so from which week to which week is this material from?
- Fri Nov 15, 2019 10:22 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: How to tell polar or non polar from lewis structure?
- Replies: 9
- Views: 635
Re: How to tell polar or non polar from lewis structure?
Is this supposed to be on next week’s test?
- Thu Nov 07, 2019 9:43 pm
- Forum: Ionic & Covalent Bonds
- Topic: polarizing power
- Replies: 7
- Views: 384
Re: polarizing power
so based off of the previous responses I'm hearing that atomic radius and polarization increase and decrease opposite of each other?
- Thu Nov 07, 2019 9:38 pm
- Forum: Resonance Structures
- Topic: resonance importance?
- Replies: 7
- Views: 390
Re: resonance importance?
So are all these answers in short saying that the resonance structures show how electrons may move to have the most stable interactions possible?
- Thu Nov 07, 2019 9:34 pm
- Forum: Lewis Structures
- Topic: Does the shape that I draw the Lewis structure matter?
- Replies: 14
- Views: 918
Re: Does the shape that I draw the Lewis structure matter?
but what if the shape determines the kind of interactions a molecule has with those surrounding it?
- Thu Nov 07, 2019 9:32 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge Equation?
- Replies: 12
- Views: 490
Re: Formal Charge Equation?
do you include the subscripts between different elements in your calculations?
- Thu Nov 07, 2019 7:09 pm
- Forum: General Science Questions
- Topic: Week 6 homework problems
- Replies: 7
- Views: 486
Re: Week 6 homework problems
sooo...should we not have done any questions that are from before 2D?
- Fri Oct 25, 2019 8:48 am
- Forum: Ionic & Covalent Bonds
- Topic: Threshold Energy
- Replies: 4
- Views: 262
Re: Threshold Energy
Does threshold energy apply in places other than the photoelectric experiment?
- Fri Oct 25, 2019 8:46 am
- Forum: Trends in The Periodic Table
- Topic: Aufbau Principle
- Replies: 11
- Views: 544
Re: Aufbau Principle
Is this then the same thing as the spin rules where we must place the “spins” of electrons properly?
- Fri Oct 25, 2019 8:44 am
- Forum: Bond Lengths & Energies
- Topic: Bond lengths
- Replies: 15
- Views: 957
Re: Bond lengths
How could there be any variance in bond length if it’s always one angstrom?
- Fri Oct 25, 2019 8:43 am
- Forum: Lewis Structures
- Topic: Where to start putting dots for electrons
- Replies: 10
- Views: 541
Re: Where to start putting dots for electrons
What does it mean by placing the dots on the diagonal sides when a double bond is present?
- Fri Oct 25, 2019 8:41 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: What's the difference between subshell vs orbitals?
- Replies: 8
- Views: 603
Re: What's the difference between subshell vs orbitals?
Wait so orbital are just used to describe when sub shells are spherical? I’m confused.
- Fri Oct 18, 2019 10:44 am
- Forum: *Shrodinger Equation
- Topic: Math Function
- Replies: 4
- Views: 189
Re: Math Function
If these are just math functions how are we supposed to apply that to a physical image, do we have to draw it as nodes and all of that?
- Fri Oct 18, 2019 10:34 am
- Forum: Properties of Electrons
- Topic: electron
- Replies: 3
- Views: 256
Re: electron
I think the mass of an electron is negligible because they are so small, and that they behave more as particles than as waves. However, they are so small that they might be able to behave as waves pretty easily. In short I don't think a constant is necessary for the mass of an electron, but I don't ...
- Fri Oct 18, 2019 10:31 am
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: What does the equation actually show?
- Replies: 3
- Views: 153
Re: What does the equation actually show?
I believe the second part of your question is the correct assumption to make.
- Fri Oct 18, 2019 10:29 am
- Forum: Properties of Light
- Topic: Wavelength and Frequency
- Replies: 2
- Views: 182
Re: Wavelength and Frequency
To speak specifically to the part about how the number of peaks can vary within a given amount of time between different wavelengths, I think you answered that within your question. The way I interpreted that, wavelength isn't so much about following the line up and down but rather the width of the ...
- Fri Oct 11, 2019 6:58 am
- Forum: Quantum Numbers and The H-Atom
- Topic: Atomic Spectra Question
- Replies: 3
- Views: 189
Re: Atomic Spectra Question
Sorry to possibly add confusion, but can you explain how you would use the relationship between wavelength and frequency to read that "barcode" image thing?
- Fri Oct 11, 2019 6:53 am
- Forum: Photoelectric Effect
- Topic: Wavelengths?
- Replies: 8
- Views: 476
Re: Wavelengths?
Higher Frequency = Higher Energy, Shorter wavelength = Higher Frequency
- Fri Oct 11, 2019 6:50 am
- Forum: Administrative Questions and Class Announcements
- Topic: posting on chemistry community
- Replies: 11
- Views: 651
Re: posting on chemistry community
I think it's safer to assume for now that posting is due on Friday, specifically at 8 am.
- Fri Oct 11, 2019 6:49 am
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect diagram
- Replies: 3
- Views: 256
Re: Photoelectric Effect diagram
I don't think this part of detection is as important as the fact that it picks up on electron emission in the first place because we work more with the equations pertaining to how much energy is present on either side of the work function. However, this might be a good question for your TA or Dr. La...
- Fri Oct 11, 2019 6:43 am
- Forum: Photoelectric Effect
- Topic: Ejecting electrons with no KE
- Replies: 3
- Views: 258
Re: Ejecting electrons with no KE
The detector used in the photoelectric effect is slightly charged towards the positive, so even if the energy from the photons meets the threshold energy/work function the detector can pick up on electron emissions (or at least, that's what I interpreted from his explanation).
- Thu Oct 03, 2019 7:20 pm
- Forum: Balancing Chemical Reactions
- Topic: Fractions in Balancing Equations
- Replies: 11
- Views: 12847
Re: Fractions in Balancing Equations
Make sure to never leave your equation with fractions in it, just multiply every coefficient by the lowest number that would make the fractional coefficient a whole number!!!!!
- Thu Oct 03, 2019 7:17 pm
- Forum: Empirical & Molecular Formulas
- Topic: 100 gram Method?
- Replies: 9
- Views: 1068
Re: 100 gram Method?
Be careful! Do not automatically make this assumption when the question gives you the amount of grams in the sample already, you would need to know the mass percentage composition already.
- Thu Oct 03, 2019 7:13 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: mol-1?
- Replies: 5
- Views: 328
Re: mol-1?
Yeah, these two units of measure are equivalent because anything attached to a negative exponent is meant to be written as a fraction for example 10^-1 = 1/10. Thus, the -1 part of g.mol-1 means that this unit can also be written as grams over moles.
- Thu Oct 03, 2019 7:08 pm
- Forum: SI Units, Unit Conversions
- Topic: Slide Show Notes
- Replies: 5
- Views: 313
Re: Slide Show Notes
Sometimes the videos he puts on the class website have the exact same examples that he uses in classes, and often he lectures exactly what he puts in a set of videos in one or two lectures.
- Thu Oct 03, 2019 7:01 pm
- Forum: SI Units, Unit Conversions
- Topic: Formula Names
- Replies: 7
- Views: 385
Re: Formula Names
I would say that if we do have to know those, it doesn't seem like we are going to have a lesson on it. If anything it would be good just to find a small chart that explains the prefixes and suffixes (i.e. -ide, -ate, etc...).
- Wed Oct 17, 2018 9:38 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Grading
- Replies: 3
- Views: 477
Re: Grading
If you're having trouble understanding the syllabus, it would probably be best to ask people who have previously taken the class. Better yet, your TA could probably break down the syllabus and grading scheme perfectly.
- Wed Oct 17, 2018 9:34 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Orbital Shape
- Replies: 1
- Views: 100
Re: Orbital Shape
To my understanding they are all possible places that electrons can be, so they would be happening simultaneously. However, if I were you I would check with my TA just to be sure.
- Wed Oct 17, 2018 9:24 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Px Py Pz
- Replies: 1
- Views: 67
Re: Px Py Pz
You should probably ask your TA when you get to your discussion section because they grade your tests and would know best how grading will go based on notation and units.
- Thu Oct 11, 2018 3:58 am
- Forum: Properties of Light
- Topic: Do I need to memorize the Light Spectrum? [ENDORSED]
- Replies: 13
- Views: 864
Re: Do I need to memorize the Light Spectrum? [ENDORSED]
I'm thinking that we might need to memorize it as well as the varying types of light in order to have a general understanding of the strength of each as they relate to each other.
- Thu Oct 11, 2018 3:55 am
- Forum: Significant Figures
- Topic: Calculators
- Replies: 20
- Views: 1691
Re: Calculators
If you're in a hurry to buy one and cannot order it or go to target to get one, they sell scientific calculators at the store in Lu Valle commons. It's the store underground by Dodd Hall.
- Thu Oct 11, 2018 3:51 am
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Molar mass
- Replies: 3
- Views: 4030
Re: Molar mass
In most of the practice and homework problems it seems that we do take coefficients into account when finding molar mass, but that is not always the case. I cannot give you a for sure rule of thumb, but I will say that there are times when we have not needed to use the coefficients when finding the ...
- Mon Oct 01, 2018 1:12 pm
- Forum: SI Units, Unit Conversions
- Topic: Office Hours [ENDORSED]
- Replies: 2
- Views: 185
Re: Office Hours [ENDORSED]
I'm not sure about office hours, but the professor sent an email that said peer learning sessions would be announced this week and next week which is (Week 1 and Week 2).
- Mon Oct 01, 2018 1:09 pm
- Forum: Balancing Chemical Reactions
- Topic: States of Matter
- Replies: 11
- Views: 2043
Re: States of Matter
To the best my knowledge an aqueous solution just means that something is in a state where it was dissolved in water. For example salt dissolved in water is a chemical reaction that produces an aqueous solution.
- Mon Oct 01, 2018 1:05 pm
- Forum: SI Units, Unit Conversions
- Topic: Week 1 Homework Assignment [ENDORSED]
- Replies: 16
- Views: 1154
Re: Week 1 Homework Assignment [ENDORSED]
On the outlines Dr. Lavelle posted there are sections that are titled 7th Edition Fundamentals, and 6th Edition Fundamentals. You'll pick 7 problems from either of those depending on which book you have. Usually, we are supposed to turn in our homework in our discussion sessions, but for week 1 (whi...