Search found 39 matches

by Catherine Bubser 2C
Fri Nov 20, 2020 7:06 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angle
Replies: 9
Views: 29

Bond Angle

What was the angle measurement for the 'seesaw' molecular shape? Will this differ based on the exact atoms in the molecule?
by Catherine Bubser 2C
Fri Nov 20, 2020 7:03 pm
Forum: Bond Lengths & Energies
Topic: electron repulsion
Replies: 13
Views: 50

Re: electron repulsion

This repulsion is what changes the shape of the atom, correct?
by Catherine Bubser 2C
Fri Nov 20, 2020 6:54 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Shape Names
Replies: 26
Views: 103

Re: Shape Names

Bent or angular can be used interchangeably for this!
by Catherine Bubser 2C
Fri Nov 20, 2020 10:43 am
Forum: Determining Molecular Shape (VSEPR)
Topic: bond angles
Replies: 16
Views: 225

Re: bond angles

If there are lone pairs causing the bod angles to deviate from their average measurements, will the new angles always be less than their average counterparts?
by Catherine Bubser 2C
Fri Nov 20, 2020 10:41 am
Forum: Determining Molecular Shape (VSEPR)
Topic: LiCO3 missing parts
Replies: 2
Views: 13

LiCO3 missing parts

It was mentioned in lecture earlier this week that LiCO3 was incorrect in the slides and that there should be a 2 after Li. Does this 2 come from the charge on the carbon or the charge on the oxygen?
by Catherine Bubser 2C
Sun Nov 15, 2020 12:05 pm
Forum: Lewis Structures
Topic: Lewis Acid and Base Reactions (Sapling Week 5/6 #6)
Replies: 4
Views: 21

Re: Lewis Acid and Base Reactions (Sapling Week 5/6 #6)

This was extremely helpful for me as well! Thank you.
by Catherine Bubser 2C
Sat Nov 14, 2020 10:39 am
Forum: Determining Molecular Shape (VSEPR)
Topic: bent v. angular
Replies: 27
Views: 466

Re: bent v. angular

Does any angular measurement aside from 180 mean the molecule has bent/ angular character?
by Catherine Bubser 2C
Sat Nov 14, 2020 10:37 am
Forum: Sigma & Pi Bonds
Topic: Triple bond?
Replies: 21
Views: 108

Re: Triple bond?

What is an example of a molecule that exhibits a delta bond?
by Catherine Bubser 2C
Sat Nov 14, 2020 10:33 am
Forum: Dipole Moments
Topic: What is a dipole moment?
Replies: 4
Views: 17

Re: What is a dipole moment?

Would that mean an induced dipole only can be seen in a nonpolar molecule since there is a difference in charges between the atoms?
by Catherine Bubser 2C
Sat Nov 14, 2020 10:28 am
Forum: Octet Exceptions
Topic: Octet Rule Exceptions
Replies: 8
Views: 55

Re: Octet Rule Exceptions

Does this mean there is no set list of elements that are considered exceptions to the octet rule? It's just any element higher than row 3?
by Catherine Bubser 2C
Sat Nov 14, 2020 9:59 am
Forum: Ionic & Covalent Bonds
Topic: Dipole- induced dipole bond vs. dipole-dipole bond
Replies: 3
Views: 20

Dipole- induced dipole bond vs. dipole-dipole bond

From my understanding, a dipole-dipole bond occurs between two polar molecules but a dipole- induced dipole molecule occurs between a nonpolar and a polar molecule. How does this nonpolar molecule become an "induced dipole" molecule and why is this not just a London dispersion force? Also,...
by Catherine Bubser 2C
Wed Nov 11, 2020 1:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Step-Up Sessions
Replies: 3
Views: 28

Step-Up Sessions

Are step-up sessions and workshops still being held today (11/11)?
by Catherine Bubser 2C
Sun Nov 08, 2020 1:18 pm
Forum: Electronegativity
Topic: Noble Gases
Replies: 40
Views: 1358

Re: Noble Gases

If asked to compare an element that is in the group to the left of the noble gas, would that element have a higher electronegativity then?
by Catherine Bubser 2C
Sun Nov 08, 2020 1:16 pm
Forum: Quantum Numbers and The H-Atom
Topic: h-atom equation variances
Replies: 2
Views: 18

h-atom equation variances

Are the constants for many equations regarding the h-atom (like Rydberg's) different from their normal constants due to the mass/ structure of the h-atom?
by Catherine Bubser 2C
Sun Nov 08, 2020 1:10 pm
Forum: Lewis Structures
Topic: lewis structure
Replies: 10
Views: 62

Re: lewis structure

To tag onto the equation posted above-iIf the formal charge is zero, the electron is stable, correct?
by Catherine Bubser 2C
Sun Nov 08, 2020 1:09 pm
Forum: Ionic & Covalent Bonds
Topic: Octet rule exceptions
Replies: 15
Views: 67

Re: Octet rule exceptions

Do these named exceptions depend on which elements these specific exceptions bond with, or are these rules across the board?
by Catherine Bubser 2C
Sun Nov 08, 2020 1:07 pm
Forum: Administrative Questions and Class Announcements
Topic: Posting Screenshots on Chem Community
Replies: 3
Views: 30

Posting Screenshots on Chem Community

Hello, could anyone type out the way to post screenshots in this chat forum? I still am unable to figure it out; I have a screenshot from a question in the Sapling textbook that I would like to post. I'm probably just glancing over the tab, so if someone could name it that would be great.
by Catherine Bubser 2C
Sat Nov 07, 2020 4:05 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Element orbital representation
Replies: 4
Views: 53

Re: Element orbital representation

Does is matter the order in which these orbitals are written as long as the n number are in order?
by Catherine Bubser 2C
Sun Nov 01, 2020 1:47 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: General Heisenberg Question
Replies: 7
Views: 60

Re: General Heisenberg Question

In regards to uncertainty in position, do we need to multiply the position by 2? On sapling, I did not need to change delta x but I did have to multiply delta x by 2 in some step-up sessions. How do we know when to do this?
by Catherine Bubser 2C
Sun Nov 01, 2020 1:41 pm
Forum: Trends in The Periodic Table
Topic: Electron Affinity vs Electronegativity
Replies: 7
Views: 44

Electron Affinity vs Electronegativity

Electronegativity references an atom's ability to attract electrons to itself, how is this different from electron affinity? Can these terms be used interchangeably/ are they the same thing?
by Catherine Bubser 2C
Sun Nov 01, 2020 1:38 pm
Forum: Properties of Light
Topic: Is c always the speed of light?
Replies: 70
Views: 236

Re: Is c always the speed of light?

Is there a specific constant for the speed of light through air or should we always assume to use c even if it is not stated a vacuum is present in the equation?
by Catherine Bubser 2C
Sun Nov 01, 2020 1:36 pm
Forum: Einstein Equation
Topic: E=hv vs E=hf
Replies: 15
Views: 74

E=hv vs E=hf

Why is frequency denoted as v in the first equation? I understand that these are the same equation and was curious as to why some equations use v.
by Catherine Bubser 2C
Mon Oct 26, 2020 1:43 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: textbook 1B.5
Replies: 2
Views: 20

textbook 1B.5

Could someone explain why delta v is multiplied by 2 in part A of this example? The denominator as a whole is also multiplied by 2 because of the proportions so I'm confused as to why the uncertainty in the speed has to be multiplied additionally.
by Catherine Bubser 2C
Sat Oct 24, 2020 10:45 am
Forum: *Shrodinger Equation
Topic: Schrodinger's Equation
Replies: 5
Views: 82

Re: Schrodinger's Equation

So does Schrodinger's equation just provide us with the nodal graph or does it give us the energy of the wavefunction. Is the nodal graph just a visual (does it have any value numerically)?
by Catherine Bubser 2C
Sat Oct 24, 2020 10:40 am
Forum: Einstein Equation
Topic: Usage of E=hv
Replies: 10
Views: 87

Re: Usage of E=hv

Would the question have to explicitly state that we are solving for the energy of incoming photon in order to use c=lambda(v) ? Is there another key word that would point to using an equation for a particle with no mass?
by Catherine Bubser 2C
Sat Oct 24, 2020 10:35 am
Forum: Molarity, Solutions, Dilutions
Topic: molar mass and g/mol
Replies: 2
Views: 34

molar mass and g/mol

When writing the molar mass, should we always assume to use grams per mol unless it is specified in the question?
by Catherine Bubser 2C
Sat Oct 24, 2020 10:32 am
Forum: SI Units, Unit Conversions
Topic: Midterm
Replies: 25
Views: 139

Re: Midterm

In response to longer questions counting as partial credit- does that mean there will be multiple questions per longer question or the question as a whole won't be worth a full point?
by Catherine Bubser 2C
Thu Oct 22, 2020 5:53 pm
Forum: Significant Figures
Topic: Sig Figs
Replies: 8
Views: 68

Re: Sig Figs

Has he mentioned if it matters if we use 3.00 or 2.99792 for the speed of light constant c?
by Catherine Bubser 2C
Sun Oct 18, 2020 9:26 pm
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 200
Views: 141257

Re: Rusty on High School Chem [ENDORSED]

It's been almost six years since I took chemistry so I am also pretty rusty; is the best study tactic just repeating different types of practice problems?
by Catherine Bubser 2C
Sun Oct 18, 2020 7:11 pm
Forum: Properties of Electrons
Topic: Electron Configuration
Replies: 3
Views: 35

Re: Electron Configuration

Also, is a space in between each sublevel needed when writing or typing the electron configuration? For example, would the configuration 3s^(2) 3p^(2) be correct or would 3s^(2)3p^(2) be correct?
by Catherine Bubser 2C
Sun Oct 18, 2020 6:58 pm
Forum: Properties of Electrons
Topic: Electron Configuration
Replies: 3
Views: 35

Electron Configuration

Does the order of the s and p electron subshells in the final electron configuration matter?
by Catherine Bubser 2C
Sun Oct 18, 2020 11:51 am
Forum: Properties of Electrons
Topic: Spectral Lines
Replies: 7
Views: 57

Re: Spectral Lines

So when we are asked to identify the number of spectral lines that could appear when an electron drops levels, do we include the level it started at? I'm slightly confused still.
by Catherine Bubser 2C
Sat Oct 17, 2020 2:44 pm
Forum: Properties of Electrons
Topic: Work function/Threshold Energy
Replies: 19
Views: 81

Re: Work function/Threshold Energy

On that note, does threshold energy refer to the amount of energy needed to move the electron in general or does it differ depending on the level level?
by Catherine Bubser 2C
Sat Oct 17, 2020 2:41 pm
Forum: Properties of Light
Topic: Incident Light
Replies: 5
Views: 47

Incident Light

Could anyone explain what incident light is? It was mentioned during a recent lecture and I just wanted to know if it is different from light in other light reactions.
by Catherine Bubser 2C
Sun Oct 11, 2020 11:54 am
Forum: Properties of Light
Topic: Photoelectric effect Problem Audio Visual Topics Q28
Replies: 4
Views: 28

Re: Photoelectric effect Problem Audio Visual Topics Q28

What does the C in this equation stand for? I watched the lecture videos and understand the other coefficients are for lambda and velocity, but I'm slightly confused as to what C is.
by Catherine Bubser 2C
Sun Oct 11, 2020 11:44 am
Forum: SI Units, Unit Conversions
Topic: Unit Rounding
Replies: 11
Views: 67

Re: Unit Rounding

How many figures should we be including in our answers on Sapling?
by Catherine Bubser 2C
Thu Oct 08, 2020 8:20 am
Forum: Administrative Questions and Class Announcements
Topic: Step Up Sessions
Replies: 71
Views: 4370

Re: Step Up Sessions

What're the differences between the step-up sessions and Professor Lavelle's online office hours? Should I try to attend both if possible?
by Catherine Bubser 2C
Thu Oct 08, 2020 8:16 am
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 153
Views: 105473

Re: Reading the textbook [ENDORSED]

I'm reading the fundamentals and the recommended textbook sections but only because its been years since I've taken chemistry and I need a refresher.
by Catherine Bubser 2C
Mon Oct 05, 2020 3:20 pm
Forum: Student Social/Study Group
Topic: GroupMe for Chem 14A
Replies: 1
Views: 52

GroupMe for Chem 14A

Hello,
Is there a GroupMe for 14A? Could someone please provide the link?
Thanks!

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