Search found 50 matches

by Kevin Antony 2B
Sat Jan 18, 2020 10:58 pm
Forum: Ideal Gases
Topic: Ideal Gas meaning
Replies: 5
Views: 18

Re: Ideal Gas meaning

At low temperatures, most gases are going to act ideally. In this course, we'll probably only deal with ideal gases because this allows for us to apply PV=nRT and infer molecular kinetic energy based on temperature.
by Kevin Antony 2B
Thu Dec 05, 2019 9:40 pm
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Base Strength
Replies: 1
Views: 33

Re: Base Strength

Look for relative anion stability. The more stable the anion, the stronger the base.
by Kevin Antony 2B
Thu Dec 05, 2019 9:39 pm
Forum: Lewis Acids & Bases
Topic: Curiosity's Sake
Replies: 1
Views: 40

Re: Curiosity's Sake

If it was a polyprotic base then the conjugate acid of NH3NH3^+ would be NH3NH4^2+
by Kevin Antony 2B
Thu Dec 05, 2019 9:37 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Acid Strength
Replies: 2
Views: 26

Re: Acid Strength

Look for which would have increased relative anion stability, that should be your stronger acid.
by Kevin Antony 2B
Thu Dec 05, 2019 9:35 pm
Forum: Hybridization
Topic: Determining Hybridization
Replies: 4
Views: 23

Re: Determining Hybridization

I believe you can tell by looking at regions of electron density.
by Kevin Antony 2B
Thu Dec 05, 2019 9:33 pm
Forum: Polyprotic Acids & Bases
Topic: Strength of Acids
Replies: 2
Views: 32

Re: Strength of Acids

Both anions would have resonance, but Chlorine's higher electronegativity makes the anion more stable. As a result HClO2 is the stronger acid.
by Kevin Antony 2B
Mon Dec 02, 2019 12:13 am
Forum: Administrative Questions and Class Announcements
Topic: Monday's Lecture
Replies: 2
Views: 17

Re: Monday's Lecture

I think he'll just be picking up where he left off.
by Kevin Antony 2B
Sun Dec 01, 2019 7:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Studying for final exam
Replies: 8
Views: 41

Re: Studying for final exam

I'm planning on just reading the textbook and doing any practice problems they give us/are on the outline.
by Kevin Antony 2B
Sun Dec 01, 2019 7:40 pm
Forum: Administrative Questions and Class Announcements
Topic: Past exams
Replies: 7
Views: 71

Re: Past exams

There might be something in the test bank if you want to check it out.
by Kevin Antony 2B
Sun Dec 01, 2019 7:40 pm
Forum: Administrative Questions and Class Announcements
Topic: Studying for the Final Exam
Replies: 1
Views: 20

Re: Studying for the Final Exam

I'm sure there will be some final review at some point where we'll be able to get practice problems, but until then you could always redo the problems from the outline.
by Kevin Antony 2B
Sat Nov 30, 2019 11:40 pm
Forum: Administrative Questions and Class Announcements
Topic: Final [ENDORSED]
Replies: 10
Views: 532

Re: Final [ENDORSED]

Has Lyndon posted a new final review yet?
by Kevin Antony 2B
Mon Nov 25, 2019 3:43 pm
Forum: Lewis Acids & Bases
Topic: Proton acceptor and proton donor?
Replies: 33
Views: 131

Re: Proton acceptor and proton donor?

The Bronsted Acid is the proton donor and the Bronsted Base is the proton acceptor.
by Kevin Antony 2B
Mon Nov 25, 2019 3:39 pm
Forum: Naming
Topic: Focus 9C.3
Replies: 4
Views: 23

Re: Focus 9C.3

The Roman Numeral (III) tells us that.
by Kevin Antony 2B
Sun Nov 24, 2019 4:14 pm
Forum: General Science Questions
Topic: Review Sessions for Final
Replies: 7
Views: 72

Re: Review Sessions for Final

Dr. Lavelle said he was working to organize rooms for the session in an email, we should probably hear about it in lecture soon.
by Kevin Antony 2B
Sun Nov 24, 2019 12:58 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination compounds
Replies: 2
Views: 14

Re: Coordination compounds

After looking it up, a coordination compound is a central atom or ion (typically a transition metal) surrounded by other molecules or ions known as ligands.
by Kevin Antony 2B
Sun Nov 24, 2019 12:56 am
Forum: Bronsted Acids & Bases
Topic: Bronsted vs. Lewis Acids
Replies: 4
Views: 42

Re: Bronsted vs. Lewis Acids

A Bronsted acid is a substance that gives off protons, so the proton donor. A Lewis acid is a substance that can accept a lone pair of electrons. Just because something is a Lewis Acid, does not mean it has to be a Bronsted Acid.
by Kevin Antony 2B
Mon Nov 18, 2019 8:49 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Bonds in VSEPR
Replies: 11
Views: 53

Re: Bonds in VSEPR

We're only looking for regions of electron density, so all bonds, lone pairs, or single electrons just count as a singular region.
by Kevin Antony 2B
Mon Nov 18, 2019 8:47 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining polarity 2E 25 pt d
Replies: 3
Views: 20

Re: Determining polarity 2E 25 pt d

The only time it could be polar is if one of the X atoms was different so that the dipoles no longer canceled each other out
by Kevin Antony 2B
Mon Nov 18, 2019 8:42 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape vs. Molecular Geometry
Replies: 3
Views: 31

Re: Molecular Shape vs. Molecular Geometry

I believe molecular geometry is the shape of a molecule when taking into consideration lone pairs of electrons while the molecular shape is the shape of the molecule when no taking into account the lone pairs.
by Kevin Antony 2B
Tue Nov 12, 2019 6:56 am
Forum: Dipole Moments
Topic: 3f.1
Replies: 3
Views: 27

Re: 3f.1

All of the molecules can have London Dispersion forces. A, C, and D will have dipole-dipole interactions, but only A and C will have Hydrogen bonding.
by Kevin Antony 2B
Mon Nov 11, 2019 12:13 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: hydrogen bonding in water
Replies: 3
Views: 21

Re: hydrogen bonding in water

The partial negative charge on the Oxygen is attracted to the partial positive of the Hydrogen. The short lines represent that attraction.
by Kevin Antony 2B
Mon Nov 11, 2019 11:42 am
Forum: General Science Questions
Topic: Chemitry Series
Replies: 5
Views: 52

Re: Chemitry Series

I believe that 14B has a lab that goes with it and I've heard all the organic chemistry courses are hard.
by Kevin Antony 2B
Mon Nov 11, 2019 11:39 am
Forum: General Science Questions
Topic: Chemistry Community Questions
Replies: 5
Views: 64

Re: Chemistry Community Questions

I would probably ask you TA about it to see how they're grading you for chem community participation. Hope that helps!
by Kevin Antony 2B
Mon Nov 11, 2019 11:38 am
Forum: General Science Questions
Topic: Midterm
Replies: 1
Views: 31

Re: Midterm

I believe that your TA will grade your midterm, and they do have partial credit.
by Kevin Antony 2B
Mon Nov 11, 2019 11:37 am
Forum: Administrative Questions and Class Announcements
Topic: Video Modules
Replies: 5
Views: 35

Re: Video Modules

I hope he does because they're a great resource. If not we still have step ups and the workshops to help fill in any gaps of knowledge.
by Kevin Antony 2B
Sun Nov 03, 2019 9:01 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Kinetic Energy Uncertainty Conversion
Replies: 3
Views: 52

Re: Kinetic Energy Uncertainty Conversion

From what I gather, you know have energy per electron. We know there are 6.022 x 10^23 electrons in a mol. If you divide by Avagadro's number you should get energy per mol.
by Kevin Antony 2B
Sun Nov 03, 2019 8:58 pm
Forum: Octet Exceptions
Topic: Octet Rule exceptions
Replies: 14
Views: 109

Re: Octet Rule exceptions

H, He, Li, Be, B, and Al I believe will never have a full octet. Additionally, some elements like Si, P, S, and Cl can have expanded octets. I'm pretty sure we just have to memorize what the exceptions are.
by Kevin Antony 2B
Sun Nov 03, 2019 8:57 pm
Forum: Lewis Structures
Topic: Delocalized Electrons
Replies: 4
Views: 21

Re: Delocalized Electrons

As resonance structures show, electrons can group in different manners. Delocalized means it doesn't group in one specific manner/with a single atom but rather with multiple.
by Kevin Antony 2B
Sun Nov 03, 2019 6:21 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Finding Final n
Replies: 2
Views: 42

Re: Finding Final n

102.6 nm would be part of the Lyman series which means n would equal 1.
by Kevin Antony 2B
Sun Nov 03, 2019 6:18 pm
Forum: Lewis Structures
Topic: Octet rule.
Replies: 2
Views: 22

Re: Octet rule.

H, He, Li, Be, B, and Al I believe will never have a full octet. Additionally, some elements like Si, P, S, and Cl can have expanded octets.
by Kevin Antony 2B
Sun Oct 27, 2019 7:58 pm
Forum: Lewis Structures
Topic: Choosing the central atom
Replies: 16
Views: 68

Re: Choosing the central atom

When choosing the central atom you look for which atom has the lowest ionization energy to be the central atom.
by Kevin Antony 2B
Sun Oct 27, 2019 7:56 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Questions with Heisenburg uncertainty principle
Replies: 2
Views: 17

Re: Questions with Heisenburg uncertainty principle

delta x is the uncertainty in position as we do not know exactly where an electron is at a given time. Delta p is the uncertainty in momentum which is derived by mass x velocity because we are not sure about the velocity.
by Kevin Antony 2B
Sun Oct 27, 2019 7:52 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron configurations
Replies: 3
Views: 22

Re: Electron configurations

To my knowledge, x, y, and z refer to the different electron pairs possible in orbital. There can be 2 electrons per orbital as long as they have opposite spin. In p, for example, there can be up to 6 electrons grouped in twos. To organize them we separate them by Px, Py, and Pz.
by Kevin Antony 2B
Sun Oct 20, 2019 8:10 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 1E-11
Replies: 4
Views: 37

Re: 1E-11

For sodium, it would look like this: [Ne] 3s^1

If you look at a periodic table, the closest element before Na with a full octet is Neon, so we start with [Ne]. From there, the valence electrons of Na fill up to the 3s^1 so we write that after.
by Kevin Antony 2B
Sun Oct 20, 2019 8:04 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg Indeterminacy Equation Confusion
Replies: 2
Views: 41

Re: Heisenberg Indeterminacy Equation Confusion

From what I understand, we don't exactly know where an electron is at a given moment so the "x" is similar to probability in the sense that we think the electron should be somewhere in that vicinity. As far as momentum goes, we appear to be calculating linear momentum as it's just mass x v...
by Kevin Antony 2B
Sun Oct 20, 2019 7:58 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: 1D-15
Replies: 3
Views: 29

Re: 1D-15

Principal numbers are your n values while the angular values are your l values. For example for 6p, n = 6 and l = 1.
by Kevin Antony 2B
Sat Oct 19, 2019 11:35 pm
Forum: Quantum Numbers and The H-Atom
Topic: Angular Wavefunctions
Replies: 2
Views: 27

Angular Wavefunctions

For tests, are we expected to know all of the angular wave function equations for all values of l as seen in topic 1D.2?
by Kevin Antony 2B
Thu Oct 17, 2019 11:21 pm
Forum: Einstein Equation
Topic: 1B.15)
Replies: 4
Views: 78

1B.15)

The velocity of an electron that is emitted from a metallic surface by a photon is 3.6 x 10^3 km/s. (a) What is the wavelength of the ejected electron? I've been trying this for some time but I can't seem to get the same answer the book has. How do I tackle it? Edit: Ok I figured it out but why do y...
by Kevin Antony 2B
Sat Oct 12, 2019 7:34 pm
Forum: Properties of Electrons
Topic: Weight of Particles
Replies: 4
Views: 31

Re: Weight of Particles

After looking it up, the masses are as follows:

Neutron = 1.6749286*10^-27 kg
Proton = 1.6726231*10^-27 kg
Electron = 9.1093897*10^-31 kg
by Kevin Antony 2B
Sat Oct 12, 2019 5:04 pm
Forum: DeBroglie Equation
Topic: Resonance
Replies: 2
Views: 28

Resonance

I'm not sure if I heard this correctly, but I believe it was briefly mentioned that the De Broglie wave equation applies for any particle that has resonance with momentum. What exactly does it mean to have resonance?
by Kevin Antony 2B
Sat Oct 12, 2019 3:22 pm
Forum: Properties of Electrons
Topic: Measuring wavelike properties
Replies: 3
Views: 29

Re: Measuring wavelike properties

In the lecture it was mentioned that anything with a De Broglie wavelength of less than 10^-15 m does not have any detectible wave-like behavior.
by Kevin Antony 2B
Sat Oct 12, 2019 3:19 pm
Forum: Properties of Light
Topic: Intensity of Light
Replies: 4
Views: 40

Intensity of Light

So if I understand this correctly, increasing the intensity of light means increasing the number of photons. How exactly are able to increase the number of photons in light?
by Kevin Antony 2B
Sat Oct 12, 2019 3:13 pm
Forum: Administrative Questions and Class Announcements
Topic: When do we need our 5 posts done by?
Replies: 4
Views: 64

Re: When do we need our 5 posts done by?

I believe that the posts are due each Sunday as that's how it was last week. To double-check I would suggest shooting your TA an email as they may have a special policy.
Hope this helps!
by Kevin Antony 2B
Wed Oct 02, 2019 10:05 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Finding the amount in moles of a part of a molecule
Replies: 3
Views: 47

Re: Finding the amount in moles of a part of a molecule

First you'll have to divide the mass of UF6 by the molar mass. This gives you the moles of UF6 present. As there are 6 moles of F- in 1 mol of UF6, multiply the result by 6. This should give you the moles of F- ions.
by Kevin Antony 2B
Tue Oct 01, 2019 11:30 pm
Forum: Administrative Questions and Class Announcements
Topic: using older edition textbook
Replies: 8
Views: 86

Re: using older edition textbook

Some questions may be different, but there is a pdf version of the 7th edition textbook in many of the chem 14a facebook messenger groupchats. You can always take a look at that book and compare it to the one you have currently.
by Kevin Antony 2B
Tue Oct 01, 2019 11:26 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant Lecture Question
Replies: 5
Views: 52

Re: Limiting Reactant Lecture Question

In theory, I suppose it is possible. To not have any limiting reactants, all the reactants would have to be present in equal moles and be used up at an equivalent rate or as long as all the same moles of each reactant are used up and all of the reactants are used up. This would mean no side reaction...
by Kevin Antony 2B
Sat Sep 28, 2019 10:11 pm
Forum: Limiting Reactant Calculations
Topic: Mass Yield of Product
Replies: 4
Views: 64

Re: Mass Yield of Product

You forgot to balance the equation. When you do, the equation shows that 1 mole of C6H9Cl3 will yield 3 moles of AgCl. Thus, the .004 moles C6H9Cl3 should yield .012 moles AgCl. Just remember to convert to grams after!
by Kevin Antony 2B
Sat Sep 28, 2019 10:03 pm
Forum: Empirical & Molecular Formulas
Topic: HW Problem F15
Replies: 2
Views: 48

Re: HW Problem F15

I believe the posts are due by next Sunday. As far as the order goes, after looking it up, the Hill System Order is one way to write it, but you may also write it in a manner where the notation indicates structure. For example, this is why you'll see the (OH) group together rather than being split a...

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