Search found 88 matches

by Gabe_Ek 1G
Mon Feb 22, 2021 12:07 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Q and K
Replies: 35
Views: 67

Re: Q and K

Hi! When Q<K, reactants are greater relative to it's proportion at equilibrium, so the reaction will go towards products. It will be the reverse for Q>K.


When Q<K, there are more reactants are and the reaction with shift towards the products. It is the reverse when Q>K.
by Gabe_Ek 1G
Mon Feb 22, 2021 12:03 am
Forum: Van't Hoff Equation
Topic: Celcius vs Kelvin for T1 and T2
Replies: 61
Views: 290

Re: Celcius vs Kelvin for T1 and T2

I believe using Kelvin is the safe option. But I know at time it's okay to use Celsius because both units have the same degree of change.
by Gabe_Ek 1G
Sun Feb 21, 2021 11:59 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: H vs q
Replies: 17
Views: 64

Re: H vs q

Kiara Phillips 3L wrote:
305405193 wrote:Does any one have any good practice problems or YouTube videos for this topic to study for the final?



This video breaks it down a bit (https://youtu.be/6bi4_sAi0gE) hope this helps!


This is a very helpful video as well, thank you!
by Gabe_Ek 1G
Sun Feb 21, 2021 11:58 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1489073

Re: Post All Chemistry Jokes Here

I was thinking to tell a Sodium and Hydrogen pun, but NaH.
by Gabe_Ek 1G
Mon Feb 15, 2021 2:29 am
Forum: Ideal Gases
Topic: Units for K
Replies: 27
Views: 100

Re: Units for K

Since K is a ratio, the units usually cancel our at the end, that's why they're no units with the final answer.
by Gabe_Ek 1G
Mon Feb 15, 2021 2:27 am
Forum: Ideal Gases
Topic: R ideal gas constant
Replies: 25
Views: 62

Re: R ideal gas constant

Yes like most people said there is two different R constants to use. You should either one accordingly based on which values are presented in the problem to get the appropriate answer.
by Gabe_Ek 1G
Mon Feb 15, 2021 2:25 am
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: confusion with notation
Replies: 11
Views: 34

Re: confusion with notation

I believe d is used for derivatives and delta is what we will be and have been using for change.
by Gabe_Ek 1G
Mon Feb 15, 2021 2:24 am
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Molar Entropy of Vaporization
Replies: 4
Views: 25

Re: Molar Entropy of Vaporization

Thank you guys for the explaination, I was also stuck on this and it really helped me out!
by Gabe_Ek 1G
Mon Feb 15, 2021 2:21 am
Forum: Administrative Questions and Class Announcements
Topic: MyUCLA Grade
Replies: 27
Views: 162

Re: MyUCLA Grade

Yea I have had similar things happened to me as well, but I believe its something that just goes on off but will eventually be there officially later on.
by Gabe_Ek 1G
Mon Feb 15, 2021 2:18 am
Forum: Student Social/Study Group
Topic: Silly Mistakes?
Replies: 60
Views: 280

Re: Silly Mistakes?

Thank you for sharing! I feel much better after reading this and knowing I'm not the only person feeling this way!
by Gabe_Ek 1G
Mon Feb 15, 2021 2:12 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Entropy
Replies: 3
Views: 21

Re: Entropy

Yes I also believe that an additional one stated is standard molar entropy which is expressed as Sm⁰
by Gabe_Ek 1G
Sun Feb 07, 2021 11:53 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Specific heat value
Replies: 11
Views: 21

Re: Specific heat value

If there is specific heat on both sides of the equation, I believe it is okay to cross them out on each side before proceeding to the next step.
by Gabe_Ek 1G
Sun Feb 07, 2021 11:38 pm
Forum: Student Social/Study Group
Topic: Post Midterm 1...
Replies: 39
Views: 148

Re: Post Midterm 1...

I also feel the same way and I'm not really happy with how it went. I'm also going to focus more on going to UA sessions and workshops and reading the text more as well.
by Gabe_Ek 1G
Sun Feb 07, 2021 11:35 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1489073

Re: Post All Chemistry Jokes Here

Why do chemist like nitrates so much?
They're cheaper than any day rates!
by Gabe_Ek 1G
Sun Jan 31, 2021 10:53 pm
Forum: Student Social/Study Group
Topic: Favorite Music
Replies: 104
Views: 285

Re: Favorite Music

At least for studying I listen to slow jazz and piano instrumentals which help me focus most times.
by Gabe_Ek 1G
Sun Jan 31, 2021 10:50 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K vs. Kc
Replies: 36
Views: 91

Re: K vs. Kc

I believe K would stand for Kp which is in regards to the equilibrium constant for pressure and Kc for molar concentrations.
by Gabe_Ek 1G
Sun Jan 31, 2021 10:48 pm
Forum: Student Social/Study Group
Topic: Congrats!!
Replies: 21
Views: 143

Re: Congrats!!

Nicely done! Now one to the next one! :|
by Gabe_Ek 1G
Sun Jan 31, 2021 10:47 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Taking the Anti-Log
Replies: 36
Views: 111

Re: Taking the Anti-Log

I believe it will be important for the rest of the class. To find Ka you would have to raise it to the power of 10 to the negative of exponent where - Ka would be 10^(-pKa)
by Gabe_Ek 1G
Sun Jan 31, 2021 10:44 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Work
Replies: 7
Views: 30

Re: Work

nayha a 1E wrote:I believe it's negative because the energy is being lost.


Yea I believe it represents an exothermic reaction that has occurred.
by Gabe_Ek 1G
Sun Jan 31, 2021 10:44 pm
Forum: General Science Questions
Topic: Midterm 1 Reactions
Replies: 70
Views: 350

Re: Midterm 1 Reactions

I was also quite frustrated by having my calculations all done to then find that none of the answer choices reflected the answer. It was a lot just a bit rushed but arguably doable.
by Gabe_Ek 1G
Sun Jan 31, 2021 10:42 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1489073

Re: Post All Chemistry Jokes Here

What do you do with a sick chemist?
If you can't Helium and you can't curium, then you're going to have to Barium
by Gabe_Ek 1G
Sun Jan 24, 2021 9:38 pm
Forum: Ideal Gases
Topic: Bars to atm [ENDORSED]
Replies: 40
Views: 238

Re: Bars to atm [ENDORSED]

Since they are relatively equal around 1atm = 1 bar, both units can be used interchangeably when solving problems!
by Gabe_Ek 1G
Sun Jan 24, 2021 9:36 pm
Forum: Student Social/Study Group
Topic: Favorite Music
Replies: 104
Views: 285

Re: Favorite Music

I also really like listening to lofi music, piano instrumentals, and classical jazz. I find those really help me stay focused and in the zone.
by Gabe_Ek 1G
Sun Jan 24, 2021 9:32 pm
Forum: Administrative Questions and Class Announcements
Topic: Audio-Visual Focus-Topics, Assessments & Surveys
Replies: 6
Views: 19

Re: Audio-Visual Focus-Topics, Assessments & Surveys

I would say they're quite helping getting a refresher on chemical chemical equilibrium. At times I even find myself going back to it figure out problems as well.
by Gabe_Ek 1G
Sun Jan 24, 2021 9:30 pm
Forum: Student Social/Study Group
Topic: Study Group
Replies: 14
Views: 54

Re: Study Group

This would really be helpful! I'll be able to keep on track and get a some help with all my confusion!
by Gabe_Ek 1G
Sun Jan 24, 2021 9:29 pm
Forum: Student Social/Study Group
Topic: Study Strategies
Replies: 31
Views: 59

Re: Study Strategies

Lily Anne Garcia 1C wrote:do the textbook problems and attend step ups


I also think this is very useful alongside the specific problems on the outline.
by Gabe_Ek 1G
Mon Jan 18, 2021 12:00 am
Forum: Student Social/Study Group
Topic: Midterms During Lecture
Replies: 44
Views: 236

Re: Midterms During Lecture

I believe that they're stated in the syllabus
by Gabe_Ek 1G
Mon Jan 18, 2021 12:00 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kw Uses
Replies: 6
Views: 27

Re: Kw Uses

with all problems involving pH, I believe you can use it
by Gabe_Ek 1G
Sun Jan 17, 2021 11:59 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Week 1 Sapling 10
Replies: 8
Views: 57

Re: Week 1 Sapling 10

Yea i believe sapling gives you different values
by Gabe_Ek 1G
Sun Jan 17, 2021 11:59 pm
Forum: Student Social/Study Group
Topic: Study Strategies
Replies: 31
Views: 59

Re: Study Strategies

The textbook questions really have everything you need for the midterms and finals
by Gabe_Ek 1G
Sun Jan 17, 2021 11:56 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Temperature
Replies: 45
Views: 160

Re: Temperature

I believe it would be critical to determine if the reaction is endothermic or exothermic for this rxn
by Gabe_Ek 1G
Sun Jan 10, 2021 12:05 pm
Forum: Ideal Gases
Topic: Units for Pressure
Replies: 41
Views: 845

Re: Units for Pressure

Is there any case where we won't use atm? Such as having to change the final answer into Pa (Pascal) or kPa?
by Gabe_Ek 1G
Sun Jan 10, 2021 11:49 am
Forum: Administrative Questions and Class Announcements
Topic: How to find my posts
Replies: 97
Views: 49792

Re: How to find my posts

904571591 wrote:You can search your username or the main words of your post.


This is what I usually do but I think we can use quick links on the top right hand corner of the website. I'm not so sure if this was here during 14A as well...
by Gabe_Ek 1G
Sun Jan 10, 2021 11:42 am
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 187
Views: 108895

Re: Reading the textbook [ENDORSED]

KTran 1I wrote:Are there a lot of topics in the book that are not covered during lecture that show up on tests?


I had the same question as well because I've heard that there's a lot of information covered that we don't need.
by Gabe_Ek 1G
Sun Jan 10, 2021 11:33 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Water
Replies: 28
Views: 131

Re: Water

OmarArafat_2K wrote:Only include H2O in the ice table if it is aqueous and gaseous, never a liquid or a solid. Ensure that you know which phase it is in always.


Is aqueous not the same as a liquid or am I getting this wrong?
by Gabe_Ek 1G
Sun Jan 10, 2021 11:17 am
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 107
Views: 7255

Re: Accessing the E-textbook [ENDORSED]

alebenavides wrote:
Lily Anne Garcia 1H wrote:i would encourage multi term, that way you can use it over several quarters for a more reasonable price

yea this is more reasonable and beneficial bc u can use it on another term.


I believe it is more beneficial because at least for when you enrolled in 14A with Lavelle it carried over into 14B.
by Gabe_Ek 1G
Sun Jan 10, 2021 11:10 am
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 107
Views: 7255

Re: Accessing the E-textbook [ENDORSED]

Nicole Critzer 2L wrote:Everything on Sapling is automatically graded right? We don't have to turn anything in for this portion of the course?


Yeah, I believe so. We just have the 5 chemistry community posts weekly that we have to "turn in."
by Gabe_Ek 1G
Tue Dec 15, 2020 7:49 pm
Forum: Naming
Topic: Latin names
Replies: 10
Views: 66

Re: Latin names

You would only use the Latin name when the atom is negatively charged / is an anion.
by Gabe_Ek 1G
Tue Dec 15, 2020 7:45 pm
Forum: Conjugate Acids & Bases
Topic: Oxyacids
Replies: 8
Views: 49

Re: Oxyacids

Ocyacids are compounds that have include both hydrogen, oxygen, and another element to make up an acid. Some examples of this are HBrO3, H2CO3, and HIO3 where the strength of the acid increases per number of oxygen.
by Gabe_Ek 1G
Tue Dec 15, 2020 7:39 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1489073

Re: Post All Chemistry Jokes Here

Forget Hydrogen, you're my number one element ;)
by Gabe_Ek 1G
Sun Dec 06, 2020 8:05 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8731
Views: 1489073

Re: Post All Chemistry Jokes Here

What is the name of 007's Eskimo cousin?
Polar Bond.
by Gabe_Ek 1G
Sun Dec 06, 2020 7:46 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Negative pH of acid
Replies: 16
Views: 85

Re: Negative pH of acid

I believe it is possible for a very strong acid to have a negative pH based on the logarithmic pH scale of the concentration of hydronium ions. But I think for this class it is going to be addressed within the 0-14 scale.
by Gabe_Ek 1G
Sun Dec 06, 2020 7:39 pm
Forum: Naming
Topic: Sapling
Replies: 11
Views: 134

Re: Sapling

En stands for a natural bidentate ligand ethylenediamine where its full chemical formula is NH2CH2CH2NH2
by Gabe_Ek 1G
Sun Dec 06, 2020 7:21 pm
Forum: Lewis Acids & Bases
Topic: sapling #6
Replies: 19
Views: 127

Re: sapling #6

CH3COOH is a weak acid because within a solution it dissociates partially, not completely, where an H+ ion is formed alongside CH3COO- ions.
by Gabe_Ek 1G
Sun Dec 06, 2020 7:16 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Sapling Question #2
Replies: 7
Views: 57

Re: Sapling Question #2

Chloride is a halogen with an oxidation state of -1. The overall charge of the compound is also -1. Even if we aren't given the oxidation of Cu we can still solve to find out. It would be X + 2(-1) = -1, where X stands for Cu. When solved we get +1 and that's the oxidation state for the metal atom Cu.
by Gabe_Ek 1G
Sun Nov 29, 2020 5:23 pm
Forum: Student Social/Study Group
Topic: Professor Lavelle's hat
Replies: 17
Views: 256

Re: Professor Lavelle's hat

All this time I thought there was a tik or a specific shape on his hat, guess I was completely wrong too.
by Gabe_Ek 1G
Sun Nov 29, 2020 5:07 pm
Forum: Student Social/Study Group
Topic: Week 8/9 Thoughts/Worries
Replies: 66
Views: 503

Re: Week 8/9 Thoughts/Worries

So far I feel okay because I think I am understanding the materials so far. The upcoming material is what is worrying me a little which is why I am not so confident about the final, but I hope to utilize all these resources well.
by Gabe_Ek 1G
Sun Nov 29, 2020 5:03 pm
Forum: Administrative Questions and Class Announcements
Topic: Weekly Discussion grades
Replies: 9
Views: 59

Re: Weekly Discussion grades

I believe the weekly discussion grades come from the Chemistry Community posts every week.
by Gabe_Ek 1G
Sun Nov 29, 2020 5:00 pm
Forum: Hybridization
Topic: Lecture #23
Replies: 13
Views: 122

Re: Lecture #23

Yes, that's true. Some of the electrons are delocalized which means they form delocalized pi bonds that are perpendicular to the Benzene molecule which can also share these electrons.
by Gabe_Ek 1G
Sun Nov 29, 2020 4:53 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Angle Masterlist
Replies: 5
Views: 55

Re: Angle Masterlist

I also found this really helpful, thank you!
by Gabe_Ek 1G
Sun Nov 29, 2020 4:51 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
Replies: 33
Views: 178

Re: London Dispersion

Yes this is true, London dispersion forces are always present within molecules. These are usually not so strong depending if the molecular mass is relatively large or not.
by Gabe_Ek 1G
Sun Nov 29, 2020 4:47 pm
Forum: Student Social/Study Group
Topic: Chemistry Among Us
Replies: 43
Views: 460

Re: Chemistry Among Us

I still do not trust Green, but just for this round, I will make friends with them to see if they act suspicious.
by Gabe_Ek 1G
Sun Nov 29, 2020 4:38 pm
Forum: Hybridization
Topic: Single Bonds and Sigma Bonds
Replies: 23
Views: 119

Re: Single Bonds and Sigma Bonds

I believe that every single bond has a sigma bond, and every other bond also consists of a sigma bond. However, a double bond has an additional pi bond, and a triple bond has 2 pi bonds as well.
by Gabe_Ek 1G
Sun Nov 22, 2020 11:07 pm
Forum: Ionic & Covalent Bonds
Topic: Ionization Energy
Replies: 19
Views: 168

Re: Ionization Energy

The outermost electron, or the one that is furthest away from the nucleus on the outermost orbital, is what is referred to as the first ionization energy.
by Gabe_Ek 1G
Sun Nov 22, 2020 10:59 pm
Forum: Student Social/Study Group
Topic: Finals!
Replies: 43
Views: 358

Re: Finals!

Yes, I believe Lavelle said the Final will be cumulative so it will cover everything.
by Gabe_Ek 1G
Sun Nov 22, 2020 10:56 pm
Forum: Molarity, Solutions, Dilutions
Topic: mmol
Replies: 14
Views: 171

Re: mmol

A unit of mmol or known more as millimole is 10^-3 of a mole or mol.
by Gabe_Ek 1G
Sun Nov 22, 2020 10:47 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sapling #1
Replies: 6
Views: 68

Re: Sapling #1

The main difference between the two ions is that the sulfur on the sulfite ion has a lone pair which changes up the geometry of the shape compared to the carbon on the carbonate ion that has no lone pairs.
by Gabe_Ek 1G
Sun Nov 22, 2020 10:35 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: memorizing VSEPR models
Replies: 13
Views: 80

Re: memorizing VSEPR models

I also really struggle with memorizing and visualizing some of the shapes. I've also heard testing yourself on Quizlet along with some useful diagrams can be really helpful.
by Gabe_Ek 1G
Sun Nov 15, 2020 9:58 pm
Forum: Trends in The Periodic Table
Topic: Ion Trends
Replies: 18
Views: 127

Re: Ion Trends

I think the atomic radius trend Is a trend we should know but I am not sure about the Ionic trend. But for the ionic radius, it decreases across a period and down a group the ionic radius increases.
by Gabe_Ek 1G
Sun Nov 15, 2020 9:52 pm
Forum: Student Social/Study Group
Topic: Chemistry Among Us
Replies: 43
Views: 460

Re: Chemistry Among Us

I would call out green, just incase I as yellow was going to die there....
by Gabe_Ek 1G
Sun Nov 15, 2020 9:43 pm
Forum: Sigma & Pi Bonds
Topic: Sigma and Pi bonds
Replies: 9
Views: 72

Re: Sigma and Pi bonds

I am not sure that he went into much detail about them last week. A single bond is a sigma bond. Double bond has one sigma, one pi. Triple has one sigma, 2 pi bonds. A sigma bond is stronger than a pi bond. Sigma bonds are overlapping of electrons on the end of each atom; it is a linear overlapping...
by Gabe_Ek 1G
Sun Nov 15, 2020 9:35 pm
Forum: Ionic & Covalent Bonds
Topic: Homework due date
Replies: 49
Views: 369

Re: Homework due date

It would be due at Sunday 11:59 before week 7 for the week 5/6 homework.
by Gabe_Ek 1G
Sun Nov 15, 2020 9:33 pm
Forum: General Science Questions
Topic: Midterm 2
Replies: 12
Views: 94

Re: Midterm 2

It will cover all the bullet points for outline 3 - chemical bonds section and the last 8 points of outline 2 - quantum world section.
by Gabe_Ek 1G
Sun Nov 15, 2020 9:31 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: Van der Waals vs London Dispersion
Replies: 10
Views: 40

Re: Van der Waals vs London Dispersion

Yes I believe Van Der Waals and London Dispersion are interchangeable. I was more familiar with VDW forces and was slightly confused but they're both dipole induced dipole interactions.
by Gabe_Ek 1G
Sun Nov 08, 2020 10:27 pm
Forum: Student Social/Study Group
Topic: Chemistry Among Us
Replies: 43
Views: 460

Re: Chemistry Among Us

I would follow green so if I die hopefully they know who is really being suspicious.
by Gabe_Ek 1G
Sun Nov 08, 2020 10:14 pm
Forum: Properties of Light
Topic: Videos
Replies: 12
Views: 138

Re: Videos

Nicole Attiq 3D wrote:The Organic Chemistry Tutor and Khan Academy are both amazing!


These are really good review videos. I also use Bozeman Science, he really helps too.
by Gabe_Ek 1G
Sun Nov 08, 2020 9:54 pm
Forum: Student Social/Study Group
Topic: Mid-quarter Check in
Replies: 67
Views: 294

Re: Mid-quarter Check in

Not the best, the online system makes everything a bit more draining but maybe that's just me. I'm definitely getting used to it though but saying that I still have a bit of catching up to do.
by Gabe_Ek 1G
Sun Nov 08, 2020 9:50 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 189
Views: 1206

Re: Favorite TV shows

Jonathan Malau 2I wrote:As a basketball fan, I really liked the Michael Jordan documentary that came out recently (now, on Netflix), known as the Last Dance.


Same here, I really enjoyed The Last Dance as well. I also finished up a new show on Netflix called The Queens Gambit which was really good too.
by Gabe_Ek 1G
Sun Nov 01, 2020 10:26 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: s and d orbitals in electron configurations
Replies: 9
Views: 72

Re: s and d orbitals in electron configurations

Whatever is at the lower energy level should be listed first. So for this example, it would be 3d^1 4s^2!
by Gabe_Ek 1G
Sun Nov 01, 2020 9:53 pm
Forum: *Shrodinger Equation
Topic: Schrodinger Equation
Replies: 5
Views: 65

Re: Schrodinger Equation

I had a similar question as well. It is confusing how Planck's constant may be introduced into this equation as I have seen before yet it is not within the original equation
by Gabe_Ek 1G
Sun Nov 01, 2020 9:41 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Electron affinity
Replies: 4
Views: 36

Re: Electron affinity

I also had a similar question to this but specifically, since affinity is associated with the addition of electrons to an atom, wouldn't gaining an atom require energy instead of it being released?
by Gabe_Ek 1G
Sun Nov 01, 2020 9:35 pm
Forum: Student Social/Study Group
Topic: Halloween!!!
Replies: 54
Views: 349

Re: Halloween!!!

Happy Halloween!! I dressed up as a soccer player and had some cake! Hope everyone stayed safe!
by Gabe_Ek 1G
Sun Nov 01, 2020 9:26 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm scores
Replies: 15
Views: 119

Re: Midterm scores

Hi! I think some students had complications with the testing (zoom/respondus issues) so likely due to make-ups it may delay but I also heard that the scores should be out by the end of the week.
by Gabe_Ek 1G
Sun Oct 25, 2020 11:18 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Equation - Sapling Question 11
Replies: 1
Views: 32

Re: Rydberg Equation - Sapling Question 11

I am also confused with this problem, however, I am not too sure how to determine the values of n using a chart of the energy level differences. If it is specifically noted to be within the H-atom does that automatically mean it is within the Balmer series?
by Gabe_Ek 1G
Sun Oct 25, 2020 10:52 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Module #20
Replies: 1
Views: 22

Module #20

The following question is from the Heisenberg module - Use the above uncertainty in velocity to calculate the electron's uncertainty in kinetic energy. Then calculate the uncertainty in kinetic energy per mole of electrons (that is, per mole of hydrogen atoms). I was able to do the first part of the...
by Gabe_Ek 1G
Sun Oct 25, 2020 10:42 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Module #18
Replies: 5
Views: 52

Re: Module #18

I was also very confused about this question. I also thought that we had to multiply the hydrogen radius by 2 before continuing on with the problem. I got a similar answer of 1.1 x 10^8 m/s, which is very close to the correct answer of 10m^8 m/s. So will it practically not matter in most situations?
by Gabe_Ek 1G
Sun Oct 25, 2020 10:32 pm
Forum: Student Social/Study Group
Topic: How to relax
Replies: 125
Views: 690

Re: How to relax

I enjoy playing video games and watching youtube to keep me entertained. If not, I sometimes like to go on walks listening to music (of any kind really) just so I can clear my head and be in a relaxed state of mind.
by Gabe_Ek 1G
Sat Oct 24, 2020 8:31 pm
Forum: Student Social/Study Group
Topic: Topic 1.C
Replies: 2
Views: 35

Re: Topic 1.C

I am not so sure too and wondering about the same thing. Does this mean we shouldn't omit some of the practice questions?
by Gabe_Ek 1G
Sun Oct 18, 2020 11:31 pm
Forum: DeBroglie Equation
Topic: Natural Frequency?
Replies: 2
Views: 8

Re: Natural Frequency?

This actually sounds very interesting! I wonder if any shift in mass can influence the potential of reach a natural frequency, if it was possible at least!
by Gabe_Ek 1G
Sun Oct 18, 2020 11:16 pm
Forum: Photoelectric Effect
Topic: Atomic Specta Post-Module Assessment
Replies: 3
Views: 38

Atomic Specta Post-Module Assessment

Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 105 m.s-1. The work function for sodium is 150.6 kJ.mol-1. How much energy is required to remove an electron from one sodium atom? Hi, I was able to get through this problem using the work function but got different...
by Gabe_Ek 1G
Sun Oct 18, 2020 11:00 pm
Forum: Photoelectric Effect
Topic: Sapling clarification
Replies: 15
Views: 102

Re: Sapling clarification

Teti Omilana 2E wrote:Sorry just to make sure I have this correct so there is no Sapling HW due tonight?


Yes, I believe there is no Sapling HW due tonight. It will be due midnight of week 4.
by Gabe_Ek 1G
Sun Oct 18, 2020 10:52 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Atomic Specta Post-Module Assessment #41
Replies: 3
Views: 33

Atomic Specta Post-Module Assessment #41

Can someone please help me work through this problem? I'm really getting mixed up, especially with the calculation.

An excited hydrogen atom emits light with a frequency of 1.14 x 1014 Hz to reach the energy level for which n = 4. In what principle quantum level did the electron begin?
by Gabe_Ek 1G
Sun Oct 18, 2020 10:24 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Atomic Spectra
Replies: 3
Views: 29

Re: Atomic Spectra

Same here with me. I am quite confused as well. I think it's something relating to "meter" in the first few words of the question but not sure what.
by Gabe_Ek 1G
Fri Oct 09, 2020 7:58 pm
Forum: Significant Figures
Topic: How many significant figures are in 7.00 x 10^2?
Replies: 25
Views: 730

Re: How many significant figures are in 7.00 x 10^2?

There are 3 significant figures here, in this case, 7 is a significant figure due to it being a non zero number, and the 2 zeros after the decimal points are also significant figures because it is after the decimal point. If it was to be written in standard notation (700), then 7 would be the only s...
by Gabe_Ek 1G
Fri Oct 09, 2020 7:50 pm
Forum: SI Units, Unit Conversions
Topic: Mole ratios: Don't forget them; how to convert g of one compound to g to an another compound/element.
Replies: 4
Views: 67

Re: Mole ratios: Don't forget them; how to convert g of one compound to g to an another compound/element.

Yes, I also agree! This is a concept that is often missed, especially by me, when trying to find the amount of product that has been produced. It can get a little unclear especially when the molar ratio of the moles of the element desired is similar to the given compound and it seems like there's no...
by Gabe_Ek 1G
Fri Oct 09, 2020 7:31 pm
Forum: SI Units, Unit Conversions
Topic: Temperature
Replies: 14
Views: 126

Re: Temperature

I also believe Professor Lavelle mentioned that the main unit that will be used for temperature will be Kelvin (K). However, most of the time I think it will depend on the units given within the problem unless it mentions otherwise, but it would also be helpful to be familiar with the conversion bet...
by Gabe_Ek 1G
Fri Oct 09, 2020 7:23 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molar Mass Stated in Sapling HW
Replies: 10
Views: 66

Re: Molar Mass Stated in Sapling HW

I was also very confused when figuring out this question as well. That plus/minus symbol shows the range of what the mass can be, so around 100g-120g. I was a bit concerned if using any number within that range within the calculation would affect the final result needed to determine the molecular fo...
by Gabe_Ek 1G
Fri Oct 09, 2020 7:07 pm
Forum: Administrative Questions and Class Announcements
Topic: Petition to Bring Music Back To Lectures [ENDORSED]
Replies: 34
Views: 555

Re: Petition to Bring Music to Back To Lectures [ENDORSED]

I couldn't agree more! The music just brings back an on-campus feeling towards class which gets me even more prepared for lectures!

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