Search found 100 matches
- Thu Mar 11, 2021 7:01 am
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: What was your favorite chem topic?
- Replies: 137
- Views: 11351
Re: What was your favorite chem topic?
chemical equilibrium for sure
- Thu Mar 11, 2021 7:00 am
- Forum: General Rate Laws
- Topic: Rate determining step
- Replies: 38
- Views: 1580
Re: Rate determining step
think of it as a team is only as strong as its weakest link. you cant go on if one of your reactions hasnt finished yet.
- Thu Mar 11, 2021 6:58 am
- Forum: General Science Questions
- Topic: Pre-Law/Pre-Med Students
- Replies: 20
- Views: 1551
Re: Pre-Law/Pre-Med Students
im pre med and liking it so far but im only a freshman so we will see how things get when the workload gets harder.
- Thu Mar 11, 2021 6:57 am
- Forum: Student Social/Study Group
- Topic: How are y'all doing?
- Replies: 46
- Views: 2743
Re: How are y'all doing?
im so stressed for the final :(
- Thu Mar 11, 2021 6:56 am
- Forum: Balancing Redox Reactions
- Topic: Balance reaction using OH- or H+
- Replies: 18
- Views: 831
Re: Balance reaction using OH- or H+
the question will explicitly state whether the reaction is acidic or basic
- Thu Mar 11, 2021 6:55 am
- Forum: First Order Reactions
- Topic: Half Life Unit
- Replies: 38
- Views: 1628
Re: Half Life Unit
the question should specifically give you a unit of time
- Thu Mar 11, 2021 6:52 am
- Forum: General Rate Laws
- Topic: Factors Affecting k
- Replies: 83
- Views: 5524
Re: Factors Affecting k
only temperature affects k
- Thu Mar 11, 2021 6:51 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Calculating n
- Replies: 17
- Views: 1024
Re: Calculating n
balance the redox equation to cancel them out
- Thu Mar 11, 2021 6:48 am
- Forum: General Rate Laws
- Topic: Liquid Water in Rate Laws
- Replies: 4
- Views: 279
Re: Liquid Water in Rate Laws
because water acts as a solvent you would not include it
- Thu Mar 11, 2021 6:46 am
- Forum: Ideal Gases
- Topic: Reversing Reactions
- Replies: 68
- Views: 2527
- Thu Mar 11, 2021 6:46 am
- Forum: Student Social/Study Group
- Topic: Culinary Chemistry
- Replies: 239
- Views: 36819
Re: Culinary Chemistry
bon appetite is amazing!!!
- Thu Mar 11, 2021 6:44 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Units for Activation Energy
- Replies: 28
- Views: 2000
- Sun Feb 28, 2021 9:14 pm
- Forum: Balancing Redox Reactions
- Topic: Sapling #1 Glitch
- Replies: 16
- Views: 857
Re: Sapling #1 Glitch
id close out and refresh it sometimes. mine glitches too
- Sun Feb 28, 2021 9:13 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Final
- Replies: 15
- Views: 871
Re: Final
March 14th from 9:30-11. we all take it at the same time
- Sun Feb 28, 2021 9:11 pm
- Forum: General Science Questions
- Topic: Midterm 2 Reactions
- Replies: 79
- Views: 6515
Re: Midterm 2 Reactions
im happy with where i am right now
- Sun Feb 28, 2021 9:11 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Log or ln
- Replies: 22
- Views: 1681
Re: Log or ln
i believe you will get different values with each so im not sure that you can use them interchangeably
- Sun Feb 28, 2021 9:09 pm
- Forum: Student Social/Study Group
- Topic: Playlist
- Replies: 86
- Views: 7470
Re: Playlist
love this idea
- Sun Feb 28, 2021 9:09 pm
- Forum: Balancing Redox Reactions
- Topic: Sapling #5
- Replies: 2
- Views: 187
Re: Sapling #5
balanced equation :
Cl2O7(g)+4H2O2(aq)+2OH−(aq)⟶2ClO−2(aq)+4O2(g)+5H2O(l)
Cl2O7(g)+4H2O2(aq)+2OH−(aq)⟶2ClO−2(aq)+4O2(g)+5H2O(l)
- Sun Feb 28, 2021 9:07 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Anode and mass
- Replies: 6
- Views: 385
Re: Anode and mass
losing electrons decreases mass
- Sun Feb 28, 2021 9:06 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Chemistry Community Points
- Replies: 24
- Views: 1137
Re: Chemistry Community Points
no extra points if you have 50 posts then youre all good
- Sun Feb 14, 2021 11:35 pm
- Forum: Calculating Work of Expansion
- Topic: negative vs positive work
- Replies: 21
- Views: 988
Re: negative vs positive work
Work is negative when the system is expanding and positive when its compressing
- Sun Feb 14, 2021 11:34 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Units for Gibbs Free Energy Calculations
- Replies: 6
- Views: 414
Re: Units for Gibbs Free Energy Calculations
G is in in KJ same with H but S is in J/k or sometimes KJ/k
G is typically answered in kJ, and H is usually given in kJ. However, S is usually given in J/K instead of kJ/K, so be sure to convert the J to kJ before plugging it into the equation. Hope this helps!
G is typically answered in kJ, and H is usually given in kJ. However, S is usually given in J/K instead of kJ/K, so be sure to convert the J to kJ before plugging it into the equation. Hope this helps!
- Sun Feb 14, 2021 11:32 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Closed vs Isolated System
- Replies: 30
- Views: 1401
Re: Closed vs Isolated System
heat can be added in a closed system but cant be in an isolated one
- Sun Feb 14, 2021 11:30 pm
- Forum: Student Social/Study Group
- Topic: Spontaneous/Favorable
- Replies: 4
- Views: 265
Re: Spontaneous/Favorable
theyre the same you can use interchangeably
- Sun Feb 14, 2021 11:30 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Would an aq agent be included in K?
- Replies: 27
- Views: 1064
Re: Would an aq agent be included in K?
solids and liquids no aq and gas yes
- Sun Feb 14, 2021 11:29 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Factors that affect the equilibrium constant
- Replies: 31
- Views: 4194
Re: Factors that affect the equilibrium constant
temperature!!
- Sun Feb 14, 2021 11:28 pm
- Forum: Student Social/Study Group
- Topic: Points needed to pass?
- Replies: 76
- Views: 8158
Re: Points needed to pass?
theres a total of 400 points you can calculate how manhy points you can miss for the desired grade
- Sun Feb 14, 2021 11:27 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: R constants
- Replies: 40
- Views: 2263
Re: R constants
8.314 is common for this unit
- Sun Feb 14, 2021 11:26 pm
- Forum: Student Social/Study Group
- Topic: Valentine's Day Long Weekend!
- Replies: 30
- Views: 2090
Re: Valentine's Day Long Weekend!
happy valentines day!
- Sun Jan 31, 2021 6:12 pm
- Forum: Student Social/Study Group
- Topic: Guyssssss...(midterm)
- Replies: 22
- Views: 957
Re: Guyssssss...(midterm)
i was pleasantly surprised with the midterm. im glad we made it through the first one proud of you guys!
- Sun Jan 31, 2021 6:04 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: State Function
- Replies: 22
- Views: 801
Re: State Function
work is dependent on the path taken to obtain its current state
- Sun Jan 31, 2021 6:02 pm
- Forum: Student Social/Study Group
- Topic: Go treat yourself after MT1!
- Replies: 75
- Views: 5456
Re: Go treat yourself after MT1!
so proud of us!!
- Sun Jan 31, 2021 6:02 pm
- Forum: Student Social/Study Group
- Topic: Congrats!!
- Replies: 21
- Views: 1101
Re: Congrats!!
woohooo lets go guys!!!
- Thu Jan 28, 2021 3:41 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Textbook example 5I.3
- Replies: 4
- Views: 211
Re: Textbook example 5I.3
because of how small K is, its less than 10^-4
- Sun Jan 24, 2021 2:54 pm
- Forum: Administrative Questions and Class Announcements
- Topic: UA workshops
- Replies: 1
- Views: 112
Re: UA workshops
i believe justin did for both midterms and the final last quarter
- Sun Jan 24, 2021 2:53 pm
- Forum: General Science Questions
- Topic: Studying
- Replies: 67
- Views: 3913
Re: Studying
just do textbook problems!
- Sun Jan 24, 2021 2:53 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Grading Scale
- Replies: 16
- Views: 1101
Re: Grading Scale
c- = 50%
- Sun Jan 24, 2021 2:49 pm
- Forum: Student Social/Study Group
- Topic: Midterms During Lecture
- Replies: 44
- Views: 2101
Re: Midterms During Lecture
you can find it on the syllabus and exam schedule on his website
- Sun Jan 24, 2021 2:48 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Timing
- Replies: 15
- Views: 499
Re: Midterm Timing
i am a little slow when it comes to test taking but i felt that i had enough time to finish. mayb enot look back over every single question but definitely get to the ones that i was unsure about
- Sun Jan 24, 2021 2:47 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Should we memorize any standard states?
- Replies: 3
- Views: 193
Re: Should we memorize any standard states?
i would just get yourself comfortable with recognizing them not necessarily memorizing
- Sun Jan 17, 2021 11:59 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: quadratic formula values
- Replies: 13
- Views: 729
Re: quadratic formula values
no negative x values and if theyre both positive one will be bigger than the initial condition which isnt right
- Sun Jan 17, 2021 11:58 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kc and Kp
- Replies: 11
- Views: 474
Re: Kc and Kp
kc is for concentration while kp is for pressure
- Sun Jan 17, 2021 11:57 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Increasing pressure
- Replies: 23
- Views: 966
Re: Increasing pressure
if youre adding a gas that isnt going to react with the already present gases then it wont do anything
- Sun Jan 17, 2021 11:55 pm
- Forum: Student Social/Study Group
- Topic: Study Strategies
- Replies: 31
- Views: 1301
Re: Study Strategies
do the textbook problems and attend step ups
- Thu Jan 07, 2021 8:59 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Gas Constant (R)
- Replies: 12
- Views: 373
Re: Gas Constant (R)
it really depends on what the problem is asking you to do. You have to associate one of the three R constants with whatever equation youre using
- Thu Jan 07, 2021 8:58 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Accessing the E-textbook [ENDORSED]
- Replies: 125
- Views: 32829
Re: Accessing the E-textbook [ENDORSED]
i would encourage multi term, that way you can use it over several quarters for a more reasonable price
- Thu Jan 07, 2021 8:57 pm
- Forum: Ideal Gases
- Topic: Kc for Gases
- Replies: 11
- Views: 559
Re: Kc for Gases
you only use partial pressures when solving for Kp meaning that they would be giving you pressures of the gases. If they give you concentrations, then you calculate Kc
- Thu Jan 07, 2021 8:56 pm
- Forum: Ideal Gases
- Topic: PV=nRT
- Replies: 74
- Views: 4740
Re: PV=nRT
pressure, volume, number of moles, constant, tempurature
- Thu Jan 07, 2021 8:55 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: reaction quotient Q vs. equilibrium constant K
- Replies: 11
- Views: 405
Re: reaction quotient Q vs. equilibrium constant K
basically k is the constant when the reaction is at equuilibrium, and you calculate q when either more reactants or products are added to the system.
- Thu Jan 07, 2021 8:54 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Lecture Format
- Replies: 22
- Views: 891
Re: Lecture Format
sadly they are all pre recorded, you can attend his office hours live
- Thu Jan 07, 2021 8:53 pm
- Forum: Ideal Gases
- Topic: Kc vs Kp
- Replies: 109
- Views: 4980
Re: Kc vs Kp
Kc refers to concentration while Kp refers to pressure. You calculate either or depending on what values you were given in the problem.
- Thu Jan 07, 2021 8:52 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Sapling Assignments
- Replies: 30
- Views: 1961
Re: Sapling Assignments
sapling and chem community are the only mandatory graded assignments
- Thu Jan 07, 2021 8:51 pm
- Forum: Ideal Gases
- Topic: reversing reactions
- Replies: 83
- Views: 5469
- Thu Jan 07, 2021 8:50 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Q and K
- Replies: 17
- Views: 793
Re: Q and K
K stays the same, but Q is what you calculate after more reactants are added
- Thu Jan 07, 2021 8:49 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Audio-Visual Topics
- Replies: 13
- Views: 597
Re: Audio-Visual Topics
theyre not part of our grade, only for additional practice. i believe thyer only put up for the first section
- Wed Dec 09, 2020 6:04 pm
- Forum: Administrative Questions and Class Announcements
- Topic: review sessions
- Replies: 2
- Views: 175
Re: review sessions
sadly, no.
- Wed Dec 09, 2020 6:04 pm
- Forum: Student Social/Study Group
- Topic: Final Exam
- Replies: 11
- Views: 826
Re: Final Exam
probably a mix of some we have seen and some new ones. same as the midterms.
- Wed Dec 09, 2020 6:02 pm
- Forum: Naming
- Topic: Naming quizlet
- Replies: 41
- Views: 1898
Re: Naming quizlet
this is great thank you so much
- Wed Dec 09, 2020 6:02 pm
- Forum: Biological Examples
- Topic: Final Exam
- Replies: 8
- Views: 610
Re: Final Exam
i think if youre going to ua sessions and do the textbook problems youll see everything you need to know
- Sun Nov 29, 2020 7:14 pm
- Forum: Student Social/Study Group
- Topic: Tips for Staying Focused
- Replies: 64
- Views: 4101
Re: Tips for Staying Focused
i set aside my phone and anything that would potentially distract me. Then i let myself work for a certain amount of time and give myself a little break afterwards. that way it is more manageable.
- Sun Nov 29, 2020 7:13 pm
- Forum: Student Social/Study Group
- Topic: Week 8/9 Thoughts/Worries
- Replies: 66
- Views: 3779
Re: Week 8/9 Thoughts/Worries
im okay as of now but stressing big time for the final
- Sun Nov 29, 2020 7:12 pm
- Forum: Ionic & Covalent Bonds
- Topic: Homework due date
- Replies: 49
- Views: 2327
Re: Homework due date
sunday night at 11:59
- Sun Nov 29, 2020 7:11 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bent
- Replies: 9
- Views: 508
Re: Bent
yeah theyre the same thing
- Sun Nov 29, 2020 7:11 pm
- Forum: Student Social/Study Group
- Topic: Final Jitters
- Replies: 457
- Views: 373414
Re: Final Jitters
Its important to get a lot o frest the night before. I also remind myself that at that moment, it is the most prepared i can be. stressing only creates anxiety for taking the test. just breathe :)
- Sun Nov 22, 2020 10:31 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: 3d and 4s
- Replies: 9
- Views: 606
Re: 3d and 4s
an element is more stable with a half full or full filled orbital shell
- Sun Nov 22, 2020 10:26 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionization Energy
- Replies: 19
- Views: 823
Re: Ionization Energy
it always takes the electron from the orbital furthest away from the nucleus
- Sun Nov 22, 2020 6:48 pm
- Forum: Student Social/Study Group
- Topic: Finals!
- Replies: 43
- Views: 2038
Re: Finals!
yes it is thats why we had two separate midterms
- Sun Nov 22, 2020 6:46 pm
- Forum: Student Social/Study Group
- Topic: How to relax after midterms
- Replies: 54
- Views: 3038
Re: How to relax after midterms
After midterms, i love to watch netflix and sleep.
- Sun Nov 15, 2020 9:52 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Missed chem community posts
- Replies: 12
- Views: 623
Re: Missed chem community posts
i think you just need an accumulative count of 50 posts by the end of the quarter
- Sun Nov 15, 2020 9:50 pm
- Forum: General Science Questions
- Topic: Midterm 2
- Replies: 12
- Views: 813
Re: Midterm 2
lavelle sent out an outline 3 page you can also find it on his website
- Sun Nov 15, 2020 9:49 pm
- Forum: Lewis Structures
- Topic: Brackets
- Replies: 9
- Views: 604
Re: Brackets
you use brackets when the molecule has an overall neg or pos charge
- Sun Nov 15, 2020 9:48 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: lodon dispersion forces
- Replies: 8
- Views: 290
Re: lodon dispersion forces
they are the weakest because they only form temporary dipole attractions
- Sun Nov 15, 2020 9:46 pm
- Forum: Resonance Structures
- Topic: Sapling 9
- Replies: 5
- Views: 367
Re: Sapling 9
the one with the formal charge closest to zero is the most plausible
- Mon Nov 09, 2020 12:05 am
- Forum: Quantum Numbers and The H-Atom
- Topic: Are there subshells past f?
- Replies: 28
- Views: 1187
Re: Are there subshells past f?
I think there are a bunch more but we wont cover them
- Mon Nov 09, 2020 12:04 am
- Forum: Ionic & Covalent Bonds
- Topic: resources
- Replies: 7
- Views: 187
Re: resources
Khan Academy works wonders!
- Mon Nov 09, 2020 12:03 am
- Forum: Student Social/Study Group
- Topic: Forming Virtual Study Group
- Replies: 31
- Views: 1194
Re: Forming Virtual Study Group
Yes I would love that even for next midterm!!
- Mon Nov 09, 2020 12:01 am
- Forum: Student Social/Study Group
- Topic: Post Midterm Blues
- Replies: 71
- Views: 3781
Re: Post Midterm Blues
Dont even worry, Im sure you did great. We can always do better on the next one!
- Sun Nov 01, 2020 9:22 pm
- Forum: DeBroglie Equation
- Topic: Sapling #10
- Replies: 3
- Views: 296
Re: Sapling #10
Use wavelength=h/mv but make sure the mass is its diatomic weight (x2) and divided by avogadros number
- Sun Nov 01, 2020 9:20 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm scores
- Replies: 15
- Views: 505
Re: Midterm scores
305572629 wrote:Does anyone know if the next midterm and final exam will be multiple choice?
I think they would be multiple choice if we take them online but Im not completely sure no info has come out yet
- Sun Nov 01, 2020 9:19 pm
- Forum: Properties of Light
- Topic: Sapling Violet line observed
- Replies: 2
- Views: 308
Re: Sapling Violet line observed
Violet light is in the Balmer series meaning n1=2. Calculate frequency using wavelength value. Then use frequency value in rydberg equation to calculate n2
- Sun Nov 01, 2020 9:17 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Sapling Q #18 and 19
- Replies: 3
- Views: 374
Re: Sapling Q #18 and 19
Ah sorry to say I wasn't having this problem. Maybe you inputed incorrect values?
- Sun Nov 01, 2020 9:16 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configuration
- Replies: 8
- Views: 384
Re: Electron Configuration
Hi! 4s is filled first and has lower energy
- Sun Oct 25, 2020 8:44 pm
- Forum: General Science Questions
- Topic: When to use sig figs
- Replies: 19
- Views: 819
Re: When to use sig figs
To avoid round off error, use the whole number until your very last calculation. If you need to write down numbers for problems with multiple steps, you can round them on paper, but keep the entire number on your calculator so you can produce a more accurate answer at the end.
- Sun Oct 25, 2020 8:41 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Sampling HW Problems
- Replies: 4
- Views: 164
Re: Sampling HW Problems
I think they are all still shuffled but everyone has the same order. Someone informed me that problems 1-10,12,14,19,22-27 are the ones to focus on.
- Sun Oct 25, 2020 8:38 pm
- Forum: Student Social/Study Group
- Topic: How do you study?
- Replies: 19
- Views: 737
Re: How do you study?
Hey Nicolette, I'm also a freshman this year. One thing I have been doing to study is looking through his outlines and modules. While the lectures are very informative, these additional resources on his website allow for extra practice and explanations. At the end of the day, repetition is what help...
- Sun Oct 25, 2020 8:34 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Orbital shapes
- Replies: 3
- Views: 279
Re: Orbital shapes
To answer the first part of your question, the electrons they describe have different probability distributions around the nucleus. This means that the electrons can be found in a variety of different region which leads to forces with different strengths.
- Sun Oct 25, 2020 8:31 pm
- Forum: Student Social/Study Group
- Topic: How to relax
- Replies: 168
- Views: 27298
Re: How to relax
I love watching Netflix. Tiktok keeps me very entertained as well.
- Sun Oct 25, 2020 8:31 pm
- Forum: Einstein Equation
- Topic: Scratch paper during the exam
- Replies: 19
- Views: 654
Re: Scratch paper during the exam
I was confused with this too, we asked our TA during discussion and he said he was okay with us having extra scratch paper out. I would definitely email yours just to be sure.
- Sun Oct 25, 2020 8:29 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Electron-Density Distribution
- Replies: 2
- Views: 81
Re: Electron-Density Distribution
Hi this is a very interesting question actually. To be honest, Im not completely sure but I would assume that it is just a very very low number. As you get closer it just approaches zero but never actually reaches it.
- Sun Oct 18, 2020 10:12 pm
- Forum: General Science Questions
- Topic: Sig Figs
- Replies: 14
- Views: 488
Re: Sig Figs
Basically, you want to use the same amount of sigfigs as the value given in the problem with the least amount. If the given values were .0078, 5.076, and .72635, your answer should only contain 2 sigfigs. I'm not too sure if we will get penalized for using the wrong amount of sig figs, but I would a...
- Sun Oct 18, 2020 10:10 pm
- Forum: Student Social/Study Group
- Topic: Midterm 1
- Replies: 8
- Views: 298
Re: Midterm 1
HI! As stated above, we will only be covering week 1-3 content. Dr. Lavelle explained in a recent email that he would never make a test covering content we were learning in that current week. Hope this helped!!
- Sun Oct 18, 2020 10:08 pm
- Forum: Photoelectric Effect
- Topic: Short/high wavelength
- Replies: 7
- Views: 305
Re: Short/high wavelength
Hi! Each photon must have sufficient energy to overcome the energy of an electron. Increasing the intensity only adds more photons, but doesn't change the amount of energy each photon has. That is why a higher frequency is needed in order to eject electrons and wavelength doesn't have much of an aff...
- Sun Oct 18, 2020 10:05 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Logic behind it
- Replies: 3
- Views: 224
Re: Logic behind it
Hi! I am not 100% positive, but I believe this answer is based solely off of logic. Nothing can possibly move faster than the speed of light.
- Sun Oct 18, 2020 10:03 pm
- Forum: Administrative Questions and Class Announcements
- Topic: formulas/equations
- Replies: 2
- Views: 71
Re: formulas/equations
Hi! Professor informed us that we will be given a formula sheet and will not have to memorize equations. He believes it is more important to understand the concepts during the problem solving process.
- Sun Oct 18, 2020 10:00 pm
- Forum: Student Social/Study Group
- Topic: Respondus Tutorial
- Replies: 1
- Views: 91
Re: Respondus Tutorial
Hi! So, basically when on Respondus you are unable to exit that browser. This means that when you get to the zoom link, you have to deny the popup that says "open zoom app?" Instead, try clicking on the option down below written in blue that says "open zoom on browser." This shou...
- Thu Oct 08, 2020 5:28 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Molarity written with (aq)
- Replies: 4
- Views: 136
Re: Molarity written with (aq)
As of now, I don't think you have to worry about writing the phases. That is not a topic we have covered yet and professor said that we would go into detail about it sometime in the future. If it makes you feel any better, I have never seen it after a molar concentration value either!
- Thu Oct 08, 2020 5:23 pm
- Forum: Limiting Reactant Calculations
- Topic: Significant figures when using scientific notion
- Replies: 5
- Views: 219
Re: Significant figures when using scientific notion
Yes! Basically, you want to use the same amount of sigfigs as the value given in the problem with the least amount. If the given values were .0062, 5.098, and .76345, your answer should only contain 2 sigfigs. Hope this helped
- Thu Oct 08, 2020 5:20 pm
- Forum: Empirical & Molecular Formulas
- Topic: difference between empirical and molecular
- Replies: 16
- Views: 1058
Re: difference between empirical and molecular
After calculating the empirical formula, you can use the periodic table to calculate its mass. If the directions are telling you to find the molecular formula, they should have given you a mass for that compound. If you divide the mass of the molecular formula by the mass of the empirical formula an...
- Thu Oct 08, 2020 5:14 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Textbook question E.1
- Replies: 7
- Views: 268
Re: Textbook question E.1
Im not positive that this is correct, but if I were to approach this problem I would multiply 6.022x10^23 by twice the length of the radius. I believe that would give the length of the nanotube. Hope I could help.
- Thu Oct 08, 2020 5:07 pm
- Forum: SI Units, Unit Conversions
- Topic: Sig figs and molar mass
- Replies: 18
- Views: 625
Re: Sig figs and molar mass
I usually use the entire value that's given on the periodic table. This is so that I can get a more accurate answer, avoiding round-off error. Once your final value is calculated you can adjust the answer to the amount of sig figs for that specific problem.