Search found 90 matches

by Sreyes_1C
Mon Mar 09, 2020 1:53 am
Forum: Experimental Details
Topic: picking a trial
Replies: 7
Views: 444

Re: picking a trial

You should end up with the same result, i guess we just always try to pick out the easiest choice
by Sreyes_1C
Mon Mar 09, 2020 1:52 am
Forum: Method of Initial Rates (To Determine n and k)
Topic: Rate Laws
Replies: 3
Views: 33

Re: Rate Laws

I also believe it'd always require some work/calculation
by Sreyes_1C
Mon Mar 09, 2020 1:51 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Arrhenius Theory
Replies: 3
Views: 32

Re: Arrhenius Theory

from my understanding, the equation helps us account for the factors that impact the rate of a reaction that we don't see in the rate laws
by Sreyes_1C
Sat Mar 07, 2020 11:16 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Electromotive force (emf)
Replies: 9
Views: 100

Re: Electromotive force (emf)

if its the same as cell potential I would assume we don't need to know much more about it
by Sreyes_1C
Sat Mar 07, 2020 11:13 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: non ideal gases
Replies: 6
Views: 96

Re: non ideal gases

yes, and not moles in the way we used to think of it, which is something that really confused me at first
by Sreyes_1C
Sat Mar 07, 2020 11:08 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: pH and Oxidizing Strength
Replies: 3
Views: 76

Re: pH and Oxidizing Strength

Also, how do you know if a metal/other compound is a strong reducing/oxidizing agent? I imagine theres a few ways but I do remember reading somewhere that good reducing agents tend to have large atomic radiuses and atoms with low EN so I figure thats one way you might be able to tell if its strong,...
by Sreyes_1C
Sat Mar 07, 2020 10:59 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Equilibrium Constants
Replies: 3
Views: 72

Re: Equilibrium Constants

It depends on what you're given but probably you can use the Nernst equation, but it depends on if you're given enough to use that
by Sreyes_1C
Sat Mar 07, 2020 10:48 pm
Forum: Balancing Redox Reactions
Topic: Physical state
Replies: 6
Views: 87

Re: Physical state

Since we only change coefficients I don't believe the physical states are altered
by Sreyes_1C
Sat Mar 07, 2020 10:44 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Study Advice
Replies: 73
Views: 3786

Re: Study Advice

I find myself very lost at times and started going to the step up sessions, which I have found pretty helpful. Before then I would just go to my PLF but the step up sessions have given me a nice boost in my understanding
by Sreyes_1C
Sun Mar 01, 2020 9:24 pm
Forum: Balancing Redox Reactions
Topic: Redox Reactions and Acid/Base Reactions
Replies: 9
Views: 105

Re: Redox Reactions and Acid/Base Reactions

Redox reactions just have to involve a change in oxidation number for one or more reactant elements, so it is not limited to that
by Sreyes_1C
Sun Mar 01, 2020 9:20 pm
Forum: Balancing Redox Reactions
Topic: Cell Diagrams
Replies: 14
Views: 114

Re: Cell Diagrams

I'm not sure what sources switch it up, but I would say in the context of this class the anode will stay on the left and cathode on the right
by Sreyes_1C
Sun Mar 01, 2020 9:16 pm
Forum: Balancing Redox Reactions
Topic: Oxidizing/reducing agent
Replies: 18
Views: 206

Re: Oxidizing/reducing agent

oxidizing agents = the ones carrying out the oxidation. and then same with reduction agents
by Sreyes_1C
Sun Mar 01, 2020 9:15 pm
Forum: Balancing Redox Reactions
Topic: oxidizing agents
Replies: 11
Views: 115

Re: oxidizing agents

I like to think of it as, the oxidizing agents carry out the oxidation, and same with reduction
by Sreyes_1C
Sun Mar 01, 2020 8:01 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Activated complex
Replies: 4
Views: 378

Re: Activated complex

I would assume we do not need to know it for the final
by Sreyes_1C
Sun Feb 23, 2020 11:55 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Units in Entropy Equation for Volume
Replies: 5
Views: 121

Re: Units in Entropy Equation for Volume

I believe the units for entropy after the calculations should end up being J/K
by Sreyes_1C
Sun Feb 23, 2020 11:54 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: S = 0
Replies: 18
Views: 258

Re: S = 0

its zero for an isothermal reversible reaction!
by Sreyes_1C
Sun Feb 23, 2020 11:45 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: w max
Replies: 3
Views: 89

Re: w max

http://www.esru.strath.ac.uk/EandE/Web_ ... s/text.htm

This link slightly touches on this subject
by Sreyes_1C
Sun Feb 23, 2020 11:42 pm
Forum: Calculating Work of Expansion
Topic: Work without volume
Replies: 5
Views: 123

Re: Work without volume

since what we learned involves expansion of volume, we need the change in volume to see how much work is done
by Sreyes_1C
Sun Feb 23, 2020 7:17 pm
Forum: Balancing Redox Reactions
Topic: Half reactions
Replies: 7
Views: 71

Re: Half reactions

Mariana Fuentes 1L wrote:A way of identifying redox reactions is : The LEO goes GER.

LEO: Lose Electrons Oxidation

GER: Gain Electrons Reduction



there's also OIL RIG, which is:
Oxidation Is Loss= OIL
Reduction Is Gain= RIG

which is referring to loss/gain of electrons
by Sreyes_1C
Sun Feb 23, 2020 7:10 pm
Forum: Balancing Redox Reactions
Topic: Balancing redox reactions
Replies: 5
Views: 50

Re: Balancing redox reactions

https://www.youtube.com/watch?v=v5sDNmYCaqo

this video on balancing redox reactions was helpful to me
by Sreyes_1C
Sun Feb 23, 2020 6:59 pm
Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
Topic: rust
Replies: 9
Views: 125

Re: rust

rusting is an oxidation reaction. iron reacts with water and oxygen to form hydrated iron(III) oxide. both water and oxygen and needed for rusting to occur. so our learning of these types of reactions applies
by Sreyes_1C
Sun Feb 23, 2020 6:48 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: galvanic/voltaic cells
Replies: 7
Views: 311

Re: galvanic/voltaic cells

the terms are used like interchangeable synonyms so I believe they are the same
by Sreyes_1C
Sun Feb 23, 2020 6:38 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: chemistry community posts
Replies: 12
Views: 79

Re: chemistry community posts

Robert Tran 1B wrote:The posts are usually counted at the end of the quarter. You should do 5/week to stay on track, but as long as you have 50 by the end of the quarter and you didn't do a bunch of them at the same time, you'll be good.


is this true? I assumed they were checked every week by the end of sunday
by Sreyes_1C
Sun Feb 23, 2020 6:36 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Half reactions
Replies: 13
Views: 126

Re: Half reactions

https://www.youtube.com/watch?v=fdbrhQAM9Gw


this video helped me understand half reactions a little better.
by Sreyes_1C
Sun Feb 23, 2020 3:50 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 5G.15
Replies: 5
Views: 74

Re: 5G.15

in that case, it seems like it is most likely wrong
by Sreyes_1C
Tue Feb 11, 2020 4:29 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: equations
Replies: 4
Views: 53

Re: equations

read closely as to what they give you. Sometimes they give you information to throw you off but look for any constant pressure, temperature, or volume. Also read closely to know exactly what values change. Also read for any words that describe the reaction or changes in the systems. If you know the ...
by Sreyes_1C
Tue Feb 11, 2020 4:15 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: First Law
Replies: 5
Views: 85

Re: First Law

Dang, studying for the midterm but this question has me curious now. I honestly have no idea but if we are trying to put it in context of that law, I guess matter isn't being created but rather expanded and recycled. But then again I don't know much about space and the universe. it'd be really crazy...
by Sreyes_1C
Tue Feb 11, 2020 4:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Tutoring? [ENDORSED]
Replies: 69
Views: 72136

Re: Tutoring? [ENDORSED]

AAP is honestly the best form of help with a class in my experience. PLFs help a lot and in my experience you form a nice small community with people in your classes you wouldn't have met otherwise
by Sreyes_1C
Tue Feb 11, 2020 4:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Tutoring? [ENDORSED]
Replies: 69
Views: 72136

Re: Tutoring? [ENDORSED]

AAP is honestly the best form of help with a class in my experience. PLFs help a lot and in my experience you form a nice small community with people in your classes you wouldn't have met otherwise
by Sreyes_1C
Tue Feb 11, 2020 3:40 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Degrees of Change in Entropy
Replies: 5
Views: 52

Re: Degrees of Change in Entropy

I think we should usually convert to kelvin, but it might depend on what the question says
by Sreyes_1C
Tue Feb 11, 2020 3:36 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: All Laws of Thermodynamics
Replies: 2
Views: 60

Re: All Laws of Thermodynamics

not sure about the concepts, but I feel like if you know the conceptual side or the actual formula part well, you'll be able to figure out the part you don't know
by Sreyes_1C
Tue Feb 11, 2020 3:32 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Midterm Material
Replies: 10
Views: 118

Re: Midterm Material

I assume we shouldn't focus on it much, but it might help knowing more about it but I am not sure if its worth risking studying it more instead of earlier topics
by Sreyes_1C
Thu Feb 06, 2020 9:35 am
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: PLF sessions
Replies: 6
Views: 86

Re: PLF sessions

How do I gain access to the emails of PLF instructors to join? I could use some help with chemistry and math /: if you're in AAP, you can just ask around and ask any PLF instructors if they know of any people who lead the PLF sessions you're looking for. I'm in AAP but one time my enrollment in PLF...
by Sreyes_1C
Sun Feb 02, 2020 7:21 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: isolated system
Replies: 13
Views: 105

Re: isolated system

the example i think of is a hydroflask. a water bottle like that isn't perfect, but ideally you can think that the temperatures don't transfer and that the temperature of the beverage in the bottle remains the same and not phased from the temperature outside the bottle.
by Sreyes_1C
Sun Feb 02, 2020 7:07 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Positive or negative work?
Replies: 8
Views: 78

Re: Positive or negative work?

it is negative if the system is expelling energy by doing work onto the surroundings. It is positive if the surroundings are doing work on the system
by Sreyes_1C
Sun Feb 02, 2020 7:05 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Constant Volume and Pressure
Replies: 7
Views: 44

Re: Constant Volume and Pressure

it means the volume or pressure will not change during the reaction. In the problems, it usually either specifies that it is constant, or you have to infer that based off what information they give you and the values they list
by Sreyes_1C
Sun Feb 02, 2020 7:04 pm
Forum: General Science Questions
Topic: Test 1: Sig Figs
Replies: 7
Views: 125

Re: Test 1: Sig Figs

I would assume they count, and I think you have to base it off how many sig figs the problem gives you. I believe its the lowest amount of sig figs the problem gives you and you match yours with those given
by Sreyes_1C
Sun Feb 02, 2020 7:01 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: extensive property
Replies: 12
Views: 118

Re: extensive property

Personally, what helped me memorize it was that i just learned to memorize the association of mass and volume to the word extensive, so when I thought of extensive I would remember mass and volume. so when I think of mass and volume I remember they depend on the amount of material
by Sreyes_1C
Sun Jan 19, 2020 6:52 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Titration
Replies: 3
Views: 31

Re: Titration

I don't think he said it's going to be on the test
by Sreyes_1C
Sun Jan 19, 2020 6:47 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Test 1 Acids and Bases Topic
Replies: 9
Views: 90

Re: Test 1 Acids and Bases Topic

Ritu Gaikwad 2E wrote:For the acids and bases, do we have to memorize the list of strong acids and bases for future tests and exams?

i'm not sure if we are required to memorize them, but it is usually good to know.
by Sreyes_1C
Sun Jan 19, 2020 6:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Concentrations
Replies: 12
Views: 87

Re: Concentrations

I'm not sure if this answers your question but if the temperature is the same the concentration does not change the equilibrium constant (k). However, if you change the temperature it does change the equilibrium constant. So temperature is the only thing that can affect the the equilibrium constant...
by Sreyes_1C
Sun Jan 19, 2020 6:40 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Why is K unitless?
Replies: 10
Views: 90

Re: Why is K unitless?

because its concentrations over concentrations, the M cancels out and its also just a ratio of the concentrations
by Sreyes_1C
Fri Jan 17, 2020 9:32 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kc & Kp
Replies: 12
Views: 108

Re: Kc & Kp

Elizabeth Harty 1A wrote:Are the calculations the same regardless of whether its concentration of partial pressure?


i believe the calculations are the same so i think its okay as long as you account for any differences in units or something
by Sreyes_1C
Sun Dec 01, 2019 10:20 pm
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: Bases
Replies: 4
Views: 392

Re: Bases

bases also react with acids on human skin, which influences how they feel
by Sreyes_1C
Sun Dec 01, 2019 10:13 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Acids Vs. Bases
Replies: 11
Views: 168

Re: Acids Vs. Bases

https://www.khanacademy.org/science/org ... sted-lowry

I found this video to be helpful with distinguishing the two
by Sreyes_1C
Sun Dec 01, 2019 8:18 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number
Replies: 4
Views: 50

Re: Coordination Number

yes so you would count the number of bonds to figure out the coordination number of the central atom
by Sreyes_1C
Sun Dec 01, 2019 8:10 pm
Forum: *Stereochemistry
Topic: What's a stereocenter?
Replies: 5
Views: 1171

Re: What's a stereocenter?

I am not sure but if it is on the final I doubt it'd be very important. As long as you remember that basic definition
by Sreyes_1C
Sun Dec 01, 2019 8:03 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxidation Number
Replies: 9
Views: 100

Re: Oxidation Number

the safe way would be to include it always, especially on an exam
by Sreyes_1C
Sun Nov 24, 2019 9:08 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: H3O+
Replies: 11
Views: 6020

Re: H3O+

its classification as tetrahedral is based off of it having 4 regions of density, as it will have a lone pair on the O as just the three hydrogrens would not satisfy oxygen
by Sreyes_1C
Sun Nov 24, 2019 8:57 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polarity
Replies: 4
Views: 49

Re: Polarity

if they have the same pull opposite of each other, like 4 of the same atoms surrounding a central atom, they will cancel out.
by Sreyes_1C
Sun Nov 24, 2019 8:47 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Intermolecular forces
Replies: 5
Views: 77

Re: Intermolecular forces

The three major types of intermolecular interactions are London dispersion forces, dipole–dipole interactions and hydrogen bonds
by Sreyes_1C
Sun Nov 24, 2019 8:41 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent vs linear
Replies: 56
Views: 1057

Re: Bent vs linear

linear will have no lone pairs so the bond angle will not be altered
by Sreyes_1C
Sun Nov 24, 2019 8:40 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs on Cenrtral Atom
Replies: 11
Views: 127

Re: Lone Pairs on Cenrtral Atom

the lone pairs will not attract the other bonds and actually repel them so bond angle decreases
by Sreyes_1C
Sun Nov 17, 2019 10:30 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: shape
Replies: 3
Views: 51

Re: shape

I think there would only be one, but maybe there are exceptions to where there could technically be more than one
by Sreyes_1C
Sun Nov 17, 2019 9:43 pm
Forum: Hybridization
Topic: Specifics
Replies: 3
Views: 59

Re: Specifics

so far, I do nt believe we should but perhaps later on that will be the case.
by Sreyes_1C
Sun Nov 17, 2019 9:41 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Lone Pairs
Replies: 5
Views: 459

Re: Lone Pairs

A lone pair of electrons at a central atom always tries to repel bonded pair of electrons. So, the bonds are displaced slightly, which leads to a decrease of bond angle.
by Sreyes_1C
Sun Nov 17, 2019 9:00 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Simpler Terms
Replies: 4
Views: 391

Re: Simpler Terms

Paramagnetic compounds are attracted to magnetic fields, they have unpaired electrons. diamagnetic compounds are repelled from magnetic fields. their electrons all have paired spins.
by Sreyes_1C
Sun Nov 17, 2019 8:53 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Covalent Character
Replies: 3
Views: 802

Re: Covalent Character

Mg and Br have a smaller difference in electronegativity
by Sreyes_1C
Sun Nov 17, 2019 8:28 pm
Forum: Hybridization
Topic: Test 2 Topics
Replies: 11
Views: 157

Re: Test 2 Topics

it is everything from the midterm onwards
by Sreyes_1C
Sun Nov 17, 2019 8:05 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Shapes
Replies: 7
Views: 76

Re: Shapes

there is linear, trigonal planar, bent, tetrahedral, trigonal pyramidal, trigonal bypyramidal, seesaw, t shaped, octahedral, square pyramidal, square planar
by Sreyes_1C
Sun Nov 17, 2019 7:47 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining a VSEPR model
Replies: 6
Views: 59

Re: Determining a VSEPR model

I don't believe it matters, as long as the number of regions of electron density is accurate
by Sreyes_1C
Sun Nov 17, 2019 7:42 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 2
Replies: 19
Views: 274

Re: Test 2

it is definitely safe to draw the most stable lewis structure to help with that.
by Sreyes_1C
Sun Nov 17, 2019 7:40 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Influence on Molecular Shape
Replies: 4
Views: 41

Re: Influence on Molecular Shape

bond angle is effected by lone pairs on the central atom. the presence of a lone pair decreases bond angle.
by Sreyes_1C
Sun Nov 03, 2019 8:15 pm
Forum: Hybridization
Topic: Electrons
Replies: 13
Views: 606

Re: Electrons

to moves to the next higher energy orbital because it is excited
by Sreyes_1C
Sun Nov 03, 2019 7:58 pm
Forum: Ionic & Covalent Bonds
Topic: In what order do electrons get removed?
Replies: 7
Views: 15715

Re: In what order do electrons get removed?

valence electrons are removed from the highest energy level first
by Sreyes_1C
Sun Nov 03, 2019 7:49 pm
Forum: Bond Lengths & Energies
Topic: Bond energies
Replies: 4
Views: 49

Re: Bond energies

I'm not sure if you mean bond strength, but if you do, single bonds are the weakest. Double bonds are stronger and triple are the strongest
by Sreyes_1C
Sun Nov 03, 2019 7:44 pm
Forum: Bond Lengths & Energies
Topic: Ions for the Midterm
Replies: 3
Views: 57

Re: Ions for the Midterm

I believe we don't have to memorize those random ions. Unless we see them a lot, I doubt we'd have to memorize them
by Sreyes_1C
Sun Nov 03, 2019 7:42 pm
Forum: Bond Lengths & Energies
Topic: Strength of Bonds
Replies: 16
Views: 203

Re: Strength of Bonds

longer bonds are weaker and shorter bonds are stronger.
by Sreyes_1C
Sun Oct 27, 2019 9:02 pm
Forum: Bond Lengths & Energies
Topic: bond lengths for single or double bonds
Replies: 7
Views: 64

Re: bond lengths for single or double bonds

not sure if it varies, but generally, the stronger the bond, the shorter the length. So a triple would be shorter than a double and a double would be shorter than a single
by Sreyes_1C
Sun Oct 27, 2019 8:55 pm
Forum: Ionic & Covalent Bonds
Topic: Double bond placement
Replies: 15
Views: 175

Re: Double bond placement

they can be placed as long as they satisfy the octet rule but you should try drawing a structure with zero formal charge because it will be most stable. the double/triple bonds will help getting the formal charge to zero
by Sreyes_1C
Sun Oct 27, 2019 8:52 pm
Forum: Lewis Structures
Topic: Figuring out When/How to Add a Double Bond
Replies: 3
Views: 39

Re: Figuring out When/How to Add a Double Bond

you would use a double or triple bond to satisfy the number of valence e- each element needs. also they are used to get the formal charge to zero
by Sreyes_1C
Sun Oct 27, 2019 8:48 pm
Forum: Lewis Structures
Topic: Lone Pairs
Replies: 12
Views: 117

Re: Lone Pairs

lone pairs are going to be two single dots next to each other that are not bonded to anything, thus making them lone pairs.
by Sreyes_1C
Sun Oct 27, 2019 8:46 pm
Forum: Electronegativity
Topic: Electronegativity
Replies: 14
Views: 139

Re: Electronegativity

Jorge Ramirez_4H wrote:Is electronegativity important when doing electron configurations?

for only electron configurations, it is not really useful. knowing what it is and its trend is more useful for bonds and lewis structures
by Sreyes_1C
Sun Oct 20, 2019 8:54 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: how to prepare
Replies: 22
Views: 237

Re: how to prepare

personally, reading a textbook does not help me, so I always recommend youtube videos. It is good to know what formulas you do not need to memorize, so you can watch these videos over and over again while focusing on learning to apply the formulas and conversions.
by Sreyes_1C
Sun Oct 20, 2019 8:47 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Hund's rule and Pauli Exclusion Principle
Replies: 14
Views: 220

Re: Hund's rule and Pauli Exclusion Principle

the relationship would be that they are both necessary in understanding how filling up the orbitals works. You can start by using Hund's rule to make sure each orbital has an electron before doubling up. Then, you can use Pauli's principle to arrange it so each orbital has one up and one down.
by Sreyes_1C
Sun Oct 20, 2019 8:37 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Short Hand
Replies: 11
Views: 114

Re: Short Hand

since the configurations continue to get longer and longer, you can start the longer configurations with an abbreviation of the noble gas that comes before it. The noble gases are the column all the way to the right and they have full outer shells, which makes it possible for us to use them when doi...
by Sreyes_1C
Sun Oct 20, 2019 7:45 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Spin up and spin down
Replies: 13
Views: 200

Re: Spin up and spin down

Since this is only 14a I dont think we should know much more about the details of it than he explains in lecture. I think main thing to remember is the -1/2 and +1/2 numbers and that it is always one down and one up in an orbital
by Sreyes_1C
Sun Oct 20, 2019 7:37 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals
Replies: 8
Views: 106

Re: Orbitals

ATingin_3I wrote:Why is it that each orbital can only hold 2 electrons max?


I suppose its just a given that is defined by the Pauli exclusion rule, along with how the two electrons must have different spins
by Sreyes_1C
Sun Oct 13, 2019 7:41 pm
Forum: Properties of Light
Topic: Photoelectric Effect
Replies: 7
Views: 71

Re: Photoelectric Effect

in vacuums, we don't see the same interferences as we would in realistic settings
by Sreyes_1C
Sun Oct 13, 2019 7:38 pm
Forum: Properties of Electrons
Topic: Mass of Electrons
Replies: 6
Views: 57

Re: Mass of Electrons

I believe it is always the same and it was a constant listed in the test sheet last week.
by Sreyes_1C
Sun Oct 13, 2019 7:30 pm
Forum: DeBroglie Equation
Topic: Diffraction patterns
Replies: 4
Views: 64

Re: Diffraction patterns

I like to remember that two in phase waves leads to constructive and two out of phase lead to destructive. What helps me is drawing out what in phase/out of phase waves would look like to visualize how it would lead to destructive or constructive.
by Sreyes_1C
Sun Oct 13, 2019 7:21 pm
Forum: Properties of Light
Topic: Speed of light.
Replies: 10
Views: 105

Re: Speed of light.

yes and it might be one of the constants listed on the test sheets
by Sreyes_1C
Sun Oct 13, 2019 7:15 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 5071

Re: Test 1 [ENDORSED]

Jasmine Kim 3H wrote:If we need to use the answer of one question for the next question and our answer for the first question is wrong, will we not get full credit for the second, even if our calculations on the second were correct?

not entirely sure, but i believe you should still get some points for accurate process
by Sreyes_1C
Mon Oct 07, 2019 11:57 pm
Forum: Empirical & Molecular Formulas
Topic: Polyatomic Ions/Naming Compounds
Replies: 6
Views: 264

Re: Polyatomic Ions/Naming Compounds

705327693 wrote:Do we have to know this stuff for the first test?

I would like to assume it wouldn't be directly tested on the first test but more than likely it would be necessary later on in the course
by Sreyes_1C
Mon Oct 07, 2019 11:54 pm
Forum: Balancing Chemical Reactions
Topic: When are atoms lost or created?
Replies: 14
Views: 508

Re: When are atoms lost or created?

Its always good to remember mass is neither created or destroyed. However it can be confusing since he mentioned something about atoms being destroyed in nuclear reactions, but pretty sure we won't see that in this class
by Sreyes_1C
Mon Oct 07, 2019 11:47 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 5071

Re: Test 1 [ENDORSED]

A bluebook is not mentioned in the syllabus for the first test
by Sreyes_1C
Mon Oct 07, 2019 11:44 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student - Part II [ENDORSED]
Replies: 174
Views: 13390

Re: Advice from a Medical Student - Part II [ENDORSED]

It was so great to hear your story. Often times it feels like we should know exactly what we want to do with our careers but it is nice to see an example of success while not knowing exactly each step going forward.

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