Search found 77 matches

by Alejandro Gonzalez 2G
Sun Feb 28, 2021 10:38 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: n in ∆G = -nFE
Replies: 54
Views: 128

Re: n in ∆G = -nFE

I believe the n refers to the number of moles of electrons transferred in the half redox reactions.
by Alejandro Gonzalez 2G
Sun Feb 28, 2021 10:34 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Anodes and Cathodes
Replies: 22
Views: 43

Re: Anodes and Cathodes

I believe oxidation occurs at the anode and reduction is occurring in the cathode.
by Alejandro Gonzalez 2G
Sun Feb 28, 2021 10:27 pm
Forum: Balancing Redox Reactions
Topic: states of matter
Replies: 52
Views: 109

Re: states of matter

Yes, unless the question says that phases are optional, I would say include the states of matter.
by Alejandro Gonzalez 2G
Sun Feb 28, 2021 10:24 pm
Forum: Balancing Redox Reactions
Topic: Finding Reagents From Provided Table
Replies: 9
Views: 23

Re: Finding Reagents From Provided Table

Yes, I think you just find the ion that you are looking for in the table and the equation that applies to it, and from there you can see the reduction potential.
by Alejandro Gonzalez 2G
Sun Feb 28, 2021 10:22 pm
Forum: Balancing Redox Reactions
Topic: Sapling #18
Replies: 5
Views: 21

Re: Sapling #18

I believe that you just need to make sure the equation is balanced correctly, i.e. having the coefficient of 6 instead of 3 in front of the H20.
by Alejandro Gonzalez 2G
Sun Feb 21, 2021 10:44 pm
Forum: Student Social/Study Group
Topic: Students Who Have a Job
Replies: 79
Views: 336

Re: Students Who Have a Job

I feel like having to balance work and school forces you to manage your time more efficiently because if you don't you can fall way behind (especially since classes are online). That happened to me last quarter, and it can be pretty stressful but I've been trying to be more productive!
by Alejandro Gonzalez 2G
Sun Feb 21, 2021 10:40 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Finding standard reaction enthalpy
Replies: 7
Views: 31

Re: Finding standard reaction enthalpy

The standard molar enthalpy is either given to you or found in the standard enthalpy of formation of the products minus the standard enthalpy of formation of the reactants.
by Alejandro Gonzalez 2G
Sun Feb 21, 2021 10:34 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gas Constant R
Replies: 42
Views: 69

Re: Gas Constant R

The gas constant you use depends on the units you have to convert to in the problem, whether they be L*atm, J, L*Torr, etc.
by Alejandro Gonzalez 2G
Sun Feb 21, 2021 10:27 pm
Forum: Van't Hoff Equation
Topic: Equation Sheet
Replies: 7
Views: 34

Re: Equation Sheet

They are the same equation, just one has a negative sign factored out so it appears at the front of the equation.
by Alejandro Gonzalez 2G
Sun Feb 21, 2021 10:24 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Meaning of K
Replies: 48
Views: 98

Re: Meaning of K

Depending on the context of the problem, K can either refer to the equilibrium constant or the temperature in Kelvin.
by Alejandro Gonzalez 2G
Sun Feb 14, 2021 11:43 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: R Constant
Replies: 89
Views: 249

Re: R Constant

I believe the R value you use depends on the units that are given to you and which ones the question asks you to end up with, whether it be J/K*mol, L*bar/K*mol, or any of the other possible values.
by Alejandro Gonzalez 2G
Sun Feb 14, 2021 11:40 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: temperature
Replies: 32
Views: 98

Re: temperature

I think depending on the type of question and which units are given, that is how to tell whether or not to convert from Celsius to Kelvin or vice versa.
by Alejandro Gonzalez 2G
Sun Feb 14, 2021 11:38 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Sapling Week 6 Question 9
Replies: 6
Views: 61

Re: Sapling Week 6 Question 9

I think in this case, the delta H value is more useful in finding the entropy of the surroundings as opposed to the system itself.
by Alejandro Gonzalez 2G
Sun Feb 14, 2021 11:35 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: What's the difference between delta G and delta G°
Replies: 7
Views: 29

Re: What's the difference between delta G and delta G°

Delta G by itself refers to change in Gibbs free energy given certain conditions, whereas delta G° refers to standard Gibbs free energy under standard conditions.
by Alejandro Gonzalez 2G
Sun Feb 14, 2021 11:30 pm
Forum: Calculating Work of Expansion
Topic: negative vs positive work
Replies: 21
Views: 65

Re: negative vs positive work

Yes, work is positive when the system is being compressed, while it is negative when the system is expanding.
by Alejandro Gonzalez 2G
Sun Feb 07, 2021 11:59 pm
Forum: Calculating Work of Expansion
Topic: R constant of an Ideal Gas
Replies: 15
Views: 43

Re: R constant of an Ideal Gas

I usually try to look at the units in order to see which R constant to use (atm vs J).
by Alejandro Gonzalez 2G
Sun Feb 07, 2021 11:58 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Positive and Negative q Value
Replies: 19
Views: 43

Re: Positive and Negative q Value

If the reaction is exothermic, then q will be negative, and if it is positive that means the reaction is endothermic.
by Alejandro Gonzalez 2G
Sun Feb 07, 2021 11:57 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: External Pressure
Replies: 32
Views: 63

Re: External Pressure

I believe external pressure is that which compresses or acts outside of a system.
by Alejandro Gonzalez 2G
Sun Feb 07, 2021 11:46 pm
Forum: Calculating Work of Expansion
Topic: Sapling week 3/4 #15
Replies: 9
Views: 51

Re: Sapling week 3/4 #15

I first found the number of moles of N2 by using the ratio of moles of NaN3 first. I then plugged that answer into the ideal gas law to find the volume, using that volume in the equation w= -P*deltaV.
by Alejandro Gonzalez 2G
Sun Feb 07, 2021 11:19 pm
Forum: Calculating Work of Expansion
Topic: Sapling #14
Replies: 11
Views: 69

Re: Sapling #14

I used the initial volume when finding the number of moles because the final volume is reached after the expansion pathways, and I think we need the number of moles before the expansion happens in order for the equation to make sense later on.
by Alejandro Gonzalez 2G
Mon Jan 25, 2021 12:00 am
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: What is the Conjugate Seesaw
Replies: 11
Views: 78

Re: What is the Conjugate Seesaw

I believe Dr. Lavelle described the conjugate seesaw as being along the lines of the stronger the acid, the weaker its conjugate base, and the stronger the base, the weaker its conjugate acid.
by Alejandro Gonzalez 2G
Sun Jan 24, 2021 11:58 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: How to calculate the pKa
Replies: 14
Views: 130

Re: How to calculate the pKa

If you are given the Ka value, you can just use the -log(Ka) in order to find the pKa value.
by Alejandro Gonzalez 2G
Sun Jan 24, 2021 11:56 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Sapling Week 2 #2
Replies: 4
Views: 33

Re: Sapling Week 2 #2

I think the assumption can only be made when the K value is less than 10^-3, otherwise, you have to just use the normal method of finding x.
by Alejandro Gonzalez 2G
Sun Jan 24, 2021 11:53 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Sapling Question 3
Replies: 4
Views: 54

Re: Sapling Question 3

I believe you use the quadratic formula to solve for x (the change in concentration), which is then plugged into the percent ionization equation. (dividing the newly found x by the initial concentration then multiplying by 100)
by Alejandro Gonzalez 2G
Mon Jan 18, 2021 12:00 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Initial Concentrations
Replies: 7
Views: 47

Re: Initial Concentrations

We are usually given some of the initial molar concentrations, as they usually indicate the reactants that form the product.
by Alejandro Gonzalez 2G
Sun Jan 17, 2021 11:29 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ICE Box
Replies: 10
Views: 62

Re: ICE Box

It depends on whether or not you are given the product's or the reactant's initial molar concentration. If it is the reactants (left side), then the molar concentration would have to decrease in order to create the product.
by Alejandro Gonzalez 2G
Sun Jan 10, 2021 11:01 pm
Forum: Ideal Gases
Topic: Non-Ideal gases?
Replies: 26
Views: 154

Re: Non-Ideal gases?

I think Dr. Lavelle said we would not be using any non-ideal gases in this course, but more likely in higher-division classes.
by Alejandro Gonzalez 2G
Sun Jan 10, 2021 10:59 pm
Forum: Ideal Gases
Topic: T variable in pv=nrt [ENDORSED]
Replies: 38
Views: 329

Re: T variable in pv=nrt [ENDORSED]

I think it's easier to keep the t units in Kelvin in the long run.
by Alejandro Gonzalez 2G
Sun Jan 10, 2021 10:57 pm
Forum: Ideal Gases
Topic: value of R
Replies: 24
Views: 116

Re: value of R

I believe the value of R depends on which units are used in the problem.
by Alejandro Gonzalez 2G
Sun Jan 10, 2021 10:55 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Stoichiometric Coefficients
Replies: 5
Views: 23

Re: Stoichiometric Coefficients

I don't remember Dr. Lavelle explaining why the coefficients become the exponents, just that they do as part of the formula.
by Alejandro Gonzalez 2G
Sun Jan 10, 2021 10:52 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Units
Replies: 27
Views: 117

Re: Units

I believe bars and atm are very similar, so it would probably just depend on the problem and the units given.
by Alejandro Gonzalez 2G
Thu Dec 17, 2020 6:35 am
Forum: General Science Questions
Topic: Grading
Replies: 6
Views: 132

Re: Grading

It updates from day to day, as sometimes I'll check and it won't be updated even though I know I did an assignment. Usually it is fixed by the next day, however, so if it is not updated in a few days you might want to contact Dr. Lavelle or your TA.
by Alejandro Gonzalez 2G
Thu Dec 17, 2020 6:34 am
Forum: General Science Questions
Topic: Passing Grade
Replies: 34
Views: 288

Re: Passing Grade

I believe it is a 50% of all the points from tests and homework and stuff that count towards you passing the class.
by Alejandro Gonzalez 2G
Thu Dec 17, 2020 6:31 am
Forum: Student Social/Study Group
Topic: Thoughts on Switching Majors?
Replies: 31
Views: 291

Re: Thoughts on Switching Majors?

I have also been considering switching my major, although I am not 100% sure what it is I want to do yet so I have been trying to take a variety of classes to see which ones are most aligned with my interests and passions.
by Alejandro Gonzalez 2G
Thu Dec 17, 2020 6:29 am
Forum: Student Social/Study Group
Topic: Course Evals
Replies: 18
Views: 137

Re: Course Evals

I don't think they are mandatory for a grade, I also forgot to fill out a few of them because of finals.
by Alejandro Gonzalez 2G
Thu Dec 17, 2020 6:27 am
Forum: Administrative Questions and Class Announcements
Topic: Lectures not loading
Replies: 6
Views: 76

Re: Lectures not loading

I had the same issue, I just tried switching to different browsers and a VPN but eventually, they started loading again. I am not sure how it was fixed but it took a while.
by Alejandro Gonzalez 2G
Sun Dec 06, 2020 11:40 pm
Forum: Naming
Topic: -ate
Replies: 17
Views: 116

Re: -ate

I believe the suffix -ate follows a compound name if it has an overall negative charge.
by Alejandro Gonzalez 2G
Sun Dec 06, 2020 11:37 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Tetrahedral vs Square Planar Coordinate Complex
Replies: 8
Views: 88

Re: Tetrahedral vs Square Planar Coordinate Complex

I don't think Dr. Lavelle expects us to differentiate for 14A, just that there are 4 coordinate covalent bonds in both.
by Alejandro Gonzalez 2G
Sun Dec 06, 2020 11:34 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Prefixes
Replies: 9
Views: 76

Re: Prefixes

The ligand charts definitely helped me, since I was able to see which prefixes correlated with which number of ligands.
by Alejandro Gonzalez 2G
Sun Dec 06, 2020 11:28 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxidation state vs. oxidation number
Replies: 4
Views: 36

Re: Oxidation state vs. oxidation number

I am pretty sure that these two terms are interchangeable, as they are used that way on the homework and practice problems.
by Alejandro Gonzalez 2G
Sun Dec 06, 2020 11:24 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Finding Coordination Numbers
Replies: 7
Views: 89

Re: Finding Coordination Numbers

I believe finding the coordination number has to do with looking at the number of ligands bound to a central metal atom.
by Alejandro Gonzalez 2G
Sun Nov 29, 2020 11:38 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Equatorial/ Axial Planes
Replies: 14
Views: 81

Re: Equatorial/ Axial Planes

I like to think of it as axial being up and down (sort of like an x and y-axis) while equatorial is a horizontal plane (like the Earth's equator).
by Alejandro Gonzalez 2G
Sun Nov 29, 2020 11:36 pm
Forum: Hybridization
Topic: Sigma and Pi bonds
Replies: 21
Views: 191

Re: Sigma and Pi bonds

I believe pi bonds are found in double and triple bonds (1 and 2 pi bonds, respectively) and sigma bonds are found in single, double, and triple bonds.
by Alejandro Gonzalez 2G
Sun Nov 29, 2020 11:34 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: finding the shape of a molecule
Replies: 6
Views: 55

Re: finding the shape of a molecule

I think that the most stable Lewis structure is usually the one we use to decide the shape of a molecule, or at least that is what Dr. Lavelle did in his lectures.
by Alejandro Gonzalez 2G
Sun Nov 29, 2020 8:41 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: ions
Replies: 8
Views: 86

Re: ions

I believe that charges do not necessarily affect VSEPR theory, as it is more focused on lone pair electrons and bonded pair electrons.
by Alejandro Gonzalez 2G
Sun Nov 29, 2020 8:23 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape
Replies: 12
Views: 87

Re: Molecular Shape

Lone pairs do affect molecular shape, as I believe they provide more repulsion than bonded electron pairs.
by Alejandro Gonzalez 2G
Sun Nov 22, 2020 11:36 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: London Dispersion Forces
Replies: 9
Views: 101

Re: London Dispersion Forces

I believe a larger surface area (more interaction between electrons) allows for stronger London dispersion forces.
by Alejandro Gonzalez 2G
Sun Nov 22, 2020 11:28 pm
Forum: *Liquid Structure (Viscosity, Surface Tension, Liquid Crystals, Ionic Liquids)
Topic: determining viscosity
Replies: 11
Views: 101

Re: determining viscosity

I think one way you can determine viscosity is by looking at things like the flow rate (putting it through a viscometer to determine how fast or slow it flows through a tube).
by Alejandro Gonzalez 2G
Sun Nov 22, 2020 11:24 pm
Forum: *Liquid Structure (Viscosity, Surface Tension, Liquid Crystals, Ionic Liquids)
Topic: Boiling and Melting point
Replies: 18
Views: 145

Re: Boiling and Melting point

I believe that the higher the boiling and/or melting point of a substance is, the stronger the intermolecular forces within it (as the bonds are stronger and harder to break).
by Alejandro Gonzalez 2G
Sun Nov 22, 2020 11:23 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: Dipole-Induced-Dipole and Dipole-Dipole
Replies: 10
Views: 153

Re: Dipole-Induced-Dipole and Dipole-Dipole

I think that if one of the molecules is nonpolar, then it is a dipole-induced -dipole interaction whereas if both molecules are polar with a dipole at all times, it is a dipole-dipole interaction.
by Alejandro Gonzalez 2G
Sun Nov 15, 2020 9:35 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Lewis acids and bases
Replies: 22
Views: 135

Re: Lewis acids and bases

I find it helpful to think of Lewis acids as the electron deficient compound that accepts electrons whereas the Lewis base in a reaction is the compound or molecule that provides electrons (donates) to form a coordinate covalent bond.
by Alejandro Gonzalez 2G
Sun Nov 15, 2020 9:33 pm
Forum: Dipole Moments
Topic: Boiling/Melting Points
Replies: 15
Views: 141

Re: Boiling/Melting Points

I think looking at intermolecular forces/interactions like London or Van der Waals forces help understand the differences in boiling points between two compounds, as those with stronger forces will need more energy to break the interactions, resulting in a higher boiling point.
by Alejandro Gonzalez 2G
Sun Nov 15, 2020 9:27 pm
Forum: Coordinate Covalent Bonds
Topic: Is a Hydrogen Bond a Coordinate Covalent Bond? [ENDORSED]
Replies: 8
Views: 214

Re: Is a Hydrogen Bond a Coordinate Covalent Bond? [ENDORSED]

I don't think that a hydrogen bond is a coordinate covalent bond, as a coordinate covalent bond is a bond in which one of the atoms provides both of the electrons needed to form that bond, whereas a hydrogen bond typically occurs between two molecules.
by Alejandro Gonzalez 2G
Sun Nov 15, 2020 9:23 pm
Forum: Dipole Moments
Topic: H-Bond acceptor
Replies: 9
Views: 77

Re: H-Bond acceptor

I think the hydrogen bond acceptor does not need to be attached to another hydrogen itself, but just needs to have a partial negative charge.
by Alejandro Gonzalez 2G
Sun Nov 15, 2020 9:21 pm
Forum: Electronegativity
Topic: determining electronegativity
Replies: 31
Views: 264

Re: determining electronegativity

I don't think we've learned how to actually calculate electronegativity, just the trends in the periodic table (which for electronegativity, increases across a period and decreases down a group).
by Alejandro Gonzalez 2G
Sun Nov 08, 2020 9:48 pm
Forum: Ionic & Covalent Bonds
Topic: Electron Affinity
Replies: 8
Views: 74

Re: Electron Affinity

I think electron affinity is basically the likelihood that an atom will gain an electron, based on the amount of energy released when a neutral atom gains an electron.
by Alejandro Gonzalez 2G
Sun Nov 08, 2020 9:31 pm
Forum: Ionic & Covalent Bonds
Topic: Chemical Bonds
Replies: 12
Views: 68

Re: Chemical Bonds

Double bonds are shorter than single bonds because they are stronger, so the electrons are closer together than in a single bond.
by Alejandro Gonzalez 2G
Sun Nov 01, 2020 11:21 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: d orbitals
Replies: 17
Views: 99

Re: d orbitals

Dr. Lavelle explained in his lecture on orbitals that there are 5 d-orbitals in total, with 3 of them being located in xy-yz-zx planes, 1 being along the x and y axis, and 1 being located along the z-axis and a donut in the xy-plane.
by Alejandro Gonzalez 2G
Sun Nov 01, 2020 11:18 pm
Forum: Trends in The Periodic Table
Topic: Electron Affinity
Replies: 4
Views: 35

Re: Electron Affinity

This was very helpful in my understanding of some of the homework problems this week, thank you!
by Alejandro Gonzalez 2G
Sun Nov 01, 2020 11:17 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Sapling Week 2-4 #21
Replies: 4
Views: 32

Re: Sapling Week 2-4 #21

The main one in this problem that helps you find the number of electrons, as the l number is based on what orbital you are in. Since it is l=2, that means it is a d-orbital, which can hold up to 5 sublevels, each of which can hold 2 electrons.
by Alejandro Gonzalez 2G
Sun Nov 01, 2020 11:14 pm
Forum: Quantum Numbers and The H-Atom
Topic: Ionization Energy Trend
Replies: 6
Views: 75

Re: Ionization Energy Trend

I think ionization energy increases as you move towards the top of the periodic table because of how close the electrons are to the nucleus, whereas elements with many shells have less pull on the outermost electrons.
by Alejandro Gonzalez 2G
Sun Nov 01, 2020 11:07 pm
Forum: Quantum Numbers and The H-Atom
Topic: Spin state
Replies: 25
Views: 222

Re: Spin state

I think the two "directions" of the spin state are just to differentiate the two from each other, not necessarily up and down in terms of the axis line.
by Alejandro Gonzalez 2G
Sun Oct 25, 2020 8:44 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Question about the Delta X and what it stands for
Replies: 6
Views: 54

Re: Question about the Delta X and what it stands for

I believe Delta X refers to the uncertainty in position, like how delta v stands for uncertainty in velocity.
by Alejandro Gonzalez 2G
Sun Oct 25, 2020 8:26 pm
Forum: Properties of Electrons
Topic: rydberg equation
Replies: 8
Views: 64

Re: rydberg equation

I agree that thinking of it as n(final)-n(initial) is more practical than n1 and n2, as you can just think of it as the energy level it ends up at minus the energy level it started at.
by Alejandro Gonzalez 2G
Sun Oct 25, 2020 8:23 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Lyman and Balmer Series
Replies: 5
Views: 65

Re: Lyman and Balmer Series

I believe it is just the Lyman and Balmer Series that we need to know for the midterm, as those are the main ones we use in the homework and textbook practice problems.
by Alejandro Gonzalez 2G
Sun Oct 25, 2020 6:58 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: When do we use Heisenberg indeterminacy equation
Replies: 10
Views: 70

Re: When do we use Heisenberg indeterminacy equation

I think it's mostly (for our purposes) used when we're trying to find velocity, at least that is what we've been doing with homework and textbook problems.
by Alejandro Gonzalez 2G
Sun Oct 25, 2020 6:53 pm
Forum: *Particle in a Box
Topic: Midterm 1
Replies: 16
Views: 259

Re: Midterm 1

Thank you guys for clarifying! I wasn't sure how much of the particle in a box concept I should review for the midterm, as I remember Dr. Lavelle saying we wouldn't need to know everything for the first midterm during lecture.
by Alejandro Gonzalez 2G
Sun Oct 18, 2020 11:14 pm
Forum: Einstein Equation
Topic: unexpected outcome of wave-particle experiment
Replies: 8
Views: 55

Re: unexpected outcome of wave-particle experiment

I think the outcome they expected was that a higher intensity of light would result in more electrons being emitted, but since there was not as much emission based on the intensity of the light when the experiment was done, they found that light did not just have wave properties.
by Alejandro Gonzalez 2G
Sun Oct 18, 2020 11:11 pm
Forum: Properties of Light
Topic: Photons
Replies: 9
Views: 81

Re: Photons

The way that Dr. Lavelle explained it, a photon is a "packet" of energy that constitutes light. These photons interact with electrons in the photoelectric effect.
by Alejandro Gonzalez 2G
Sun Oct 18, 2020 11:09 pm
Forum: Photoelectric Effect
Topic: Short/high wavelength
Replies: 7
Views: 57

Re: Short/high wavelength

Seeing all of these answers helps me understand further the concept behind the photoelectric effect, as I was still a bit confused on high and short wavelengths and the energy threshold.
by Alejandro Gonzalez 2G
Sun Oct 18, 2020 11:07 pm
Forum: *Black Body Radiation
Topic: Equation
Replies: 8
Views: 244

Re: Equation

I believe Dr. Lavelle stated that we wouldn't necessarily be going in depth on black body radiation in this class, so I don't think we need to know any equations for it as of now.
by Alejandro Gonzalez 2G
Sun Oct 18, 2020 1:08 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 203
Views: 1402

Re: How are you studying?

For me, taking notes during the lectures and highlighting key concepts or learning objectives helps me to better understand what I am learning. I also pay attention to practice problems or examples given in discussion section to further understand certain steps or ideas I might have been confused ab...
by Alejandro Gonzalez 2G
Sun Oct 11, 2020 11:20 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant and Limiting Reagent
Replies: 7
Views: 97

Re: Limiting Reactant and Limiting Reagent

Thanks for clarifying, I also wasn't sure if these two terms were interchangeable. Now that I am aware of this I probably won't think of something else if I see reagent being used instead of reactant on homework or a quiz or something.
by Alejandro Gonzalez 2G
Sun Oct 11, 2020 11:14 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molar Mass and precision/interpretation
Replies: 5
Views: 58

Re: Molar Mass and precision/interpretation

I also used 100g because in every example Dr. Lavelle has used in finding molar mass, it was much easier to assume a 100g sample (when given percentages). In this case, I guess the error allowed us to simplify our calculations a little bit.
by Alejandro Gonzalez 2G
Sun Oct 11, 2020 11:00 pm
Forum: Molarity, Solutions, Dilutions
Topic: Sapling HW question
Replies: 4
Views: 111

Re: Sapling HW question

Yeah I was also confused about finding the molar masses, and I tried to solve it multiple times but I was finally able to realize that the molar ratios of the reactant and the product were equal so finding them at first was not totally necessary.
by Alejandro Gonzalez 2G
Sun Oct 11, 2020 8:58 pm
Forum: Empirical & Molecular Formulas
Topic: Sapling Hw #10
Replies: 10
Views: 101

Re: Sapling Hw #10

Seeing the steps one by one made it much easier to go through the problem, since it's been a while for me since I've done any calculations like this. Thank you guys it really helped me understand what I was doing!
by Alejandro Gonzalez 2G
Sun Oct 11, 2020 6:57 pm
Forum: SI Units, Unit Conversions
Topic: Formula Units v.s Molecules
Replies: 4
Views: 44

Re: Formula Units v.s Molecules

I'm not 100% sure based on the context of the problems being mentioned, but I think formula units basically refers to the empirical formula (or the lowest ratio possible of ions) of an ionic compound, whereas molecules refer to the individual components in covalent compounds.

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