Search found 55 matches

by Jacob Schwarz-Discussion 3I
Sun Jan 10, 2021 11:20 pm
Forum: Ideal Gases
Topic: Units of Temperature
Replies: 82
Views: 288

Re: Units of Temperature

Juwan_Madaki_3K wrote:When using the ideal gas law, which units should the temperature be in? Kelvins or Celsius?

You would use Kelvin for the ideal gas law
by Jacob Schwarz-Discussion 3I
Sun Jan 10, 2021 11:16 pm
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Posts in 14B [ENDORSED]
Replies: 125
Views: 1901

Re: Chemistry Posts in 14B [ENDORSED]

Lorena_Morales_1K wrote:What weeks will the first midterm cover?

Pretty sure it will be weeks 1-3 just like fall quarter. I could be wrong through does anyone else know?
by Jacob Schwarz-Discussion 3I
Sun Jan 10, 2021 11:05 pm
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Posts in 14B [ENDORSED]
Replies: 125
Views: 1901

Re: Chemistry Posts in 14B [ENDORSED]

You will add on to the total number of posts that you already have. So by the end of 14B, you will need 100 posts. You also need to change your username for your discussion section.
by Jacob Schwarz-Discussion 3I
Sun Jan 10, 2021 10:57 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8548
Views: 1474861

Re: Post All Chemistry Jokes Here

Did you know that you can cool yourself to -273.15˚C and still be 0k?
This one blew me out of the water
by Jacob Schwarz-Discussion 3I
Tue Dec 15, 2020 12:14 am
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Sapling Question 13
Replies: 4
Views: 48

Re: Sapling Question 13

Jacob Schwarz wrote:Because the pH is bigger than the pkA in this problem, the solution therefore has a charge involved in it.


I forgot to clarify on this post but the charge also indicates that it's basic(according to this solution).
by Jacob Schwarz-Discussion 3I
Tue Dec 15, 2020 12:13 am
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Sapling Question 13
Replies: 4
Views: 48

Re: Sapling Question 13

Because the pH is bigger than the pkA in this problem, the solution therefore has a charge involved in it.
by Jacob Schwarz-Discussion 3I
Tue Dec 15, 2020 12:09 am
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 226
Views: 36006

Re: Final Jitters

Don't know how you guys felt about it but just wanna let you know that I hope y'all did good on it and there is nothing we can do now so just wanted to say I love you all!!
by Jacob Schwarz-Discussion 3I
Tue Dec 15, 2020 12:07 am
Forum: DeBroglie Equation
Topic: Units for DeBrogile Equation
Replies: 8
Views: 68

Re: Units for DeBrogile Equation

For the DeBroglie Equation:

Mass=kilograms(kg)
Velocity=meters per second(m/s)
Wavelength=meters(m)
by Jacob Schwarz-Discussion 3I
Tue Dec 15, 2020 12:01 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty in position
Replies: 4
Views: 49

Re: Uncertainty in position

You would multiply .01 by .05nm, which is the uncertainty in position, and by doing this you find 1% of .05 nm. (+- 1)
by Jacob Schwarz-Discussion 3I
Mon Dec 14, 2020 11:52 pm
Forum: Administrative Questions and Class Announcements
Topic: Course Evaluations
Replies: 9
Views: 306

Re: Course Evaluations

If you use the link through the email it will likely help. It's due Wednesday morning though and I think they extended it for the same problems you were having.
by Jacob Schwarz-Discussion 3I
Mon Dec 07, 2020 10:16 pm
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 106
Views: 7187

Re: Accessing the E-textbook [ENDORSED]

Kennedi2J wrote:Does anyone know if Sapling is mandatory?

The sapling is mandatory for points.
by Jacob Schwarz-Discussion 3I
Mon Dec 07, 2020 10:13 pm
Forum: Resonance Structures
Topic: Stability
Replies: 13
Views: 108

Re: Stability

They are more stable due to the delocalization of the electrons in resonance structures. The electrons have more options and therefore increased stability. I hope this helps!
by Jacob Schwarz-Discussion 3I
Mon Dec 07, 2020 10:09 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Preference on Scientific Notation
Replies: 13
Views: 166

Re: Preference on Scientific Notation

1.0*10^6 is used more often, yet both are technically correct. I would stick to the former because it is what is used on the midterms/finals.
by Jacob Schwarz-Discussion 3I
Mon Dec 07, 2020 10:04 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Avogadro constant
Replies: 16
Views: 154

Re: Avogadro constant

You use this constant to convert atoms/electrons/molecules into the number of moles, or conversely the number of moles into atoms/electrons/molecules.
by Jacob Schwarz-Discussion 3I
Mon Dec 07, 2020 10:02 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8548
Views: 1474861

Re: Post All Chemistry Jokes Here

What's the dullest element?
Obviously Bohrium!
by Jacob Schwarz-Discussion 3I
Mon Nov 30, 2020 11:04 am
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 216
Views: 142799

Re: Rusty on High School Chem [ENDORSED]

Hey Rusty!! If you watch lavelles audio visual concepts on his website, this should help a lot. I also recommend taking his post module tests multiple times. These caught me up, but he also reviews everything during his lectures. He doesn’t expect you to know much coming in, and reviews everything w...
by Jacob Schwarz-Discussion 3I
Mon Nov 30, 2020 10:57 am
Forum: Hybridization
Topic: Sigma and Pi bonds
Replies: 21
Views: 159

Re: Sigma and Pi bonds

Sigma bonds are single bonds and Pi bonds are double or triple bonds. Every bond contains a sigma bond. Ex: double bond=1 sigma + 1pi, triple bond=1 sigma +2 pi
by Jacob Schwarz-Discussion 3I
Mon Nov 30, 2020 10:55 am
Forum: Hybridization
Topic: Hybridization of Carbon
Replies: 10
Views: 85

Re: Hybridization of Carbon

Because Carbon has 4 valence electrons, it forms 4 bonds. 1 electron in the S state and three unpaired electrons in the P state. Therefore sp3
by Jacob Schwarz-Discussion 3I
Mon Nov 30, 2020 10:53 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Sapling Week 8 #3
Replies: 5
Views: 62

Re: Sapling Week 8 #3

Because of the additional lone pair, the bond angles will be slightly lower than 109.5. Answers such as 109,108,or 107 would likely be sufficient
by Jacob Schwarz-Discussion 3I
Mon Nov 30, 2020 10:49 am
Forum: Hybridization
Topic: How to simply determine hybridization
Replies: 27
Views: 186

Re: How to simply determine hybridization

You first need to calculate how many regions of electron density you have. From there if you have 4 regions, it will be sp3, 5 regions, sp3d, and so on
by Jacob Schwarz-Discussion 3I
Mon Nov 30, 2020 10:47 am
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 182
Views: 106825

Re: Reading the textbook [ENDORSED]

I do try to read the textbook but quite honestly, at times it is very difficult to read. I would definitely recommend trying your best, but I’ve found the textbook problems the most helpful
by Jacob Schwarz-Discussion 3I
Mon Nov 30, 2020 10:41 am
Forum: Electronegativity
Topic: Polarity of Molecules
Replies: 7
Views: 59

Re: Polarity of Molecules

If the central atom is bonded to a more electronegative atom, the central atom will be pulled towards that atom, creating a polar atom. The symmetry of an atom also determines whether the molecule is polar. If the molecule is symmetrical, it is likely non-polar, and vice-versa
by Jacob Schwarz-Discussion 3I
Mon Nov 30, 2020 10:29 am
Forum: Electronegativity
Topic: Be vs Cl
Replies: 13
Views: 108

Re: Be vs Cl

Hey Karina!!
Although Be is one row higher than Cl, Cl is much farther to the right than Be. Because it is much farther to the right, this outweighs the fact that Be is one row higher. Cl therefore has the higher electronegativity.
by Jacob Schwarz-Discussion 3I
Mon Nov 30, 2020 10:26 am
Forum: Properties of Light
Topic: Study Advice
Replies: 50
Views: 295

Re: Study Advice

I would recommend doing both. The textbook problems are extremely helpful, but I’ve found that supplementing these with attending the step up sessions is the best. It also depends on how you learn best
by Jacob Schwarz-Discussion 3I
Sun Nov 15, 2020 11:51 pm
Forum: Significant Figures
Topic: Sig Fig Question
Replies: 12
Views: 145

Re: Sig Fig Question

For anyone on this thread,
we don't need to worry about Sig Figs for the midterm!!
by Jacob Schwarz-Discussion 3I
Sun Nov 15, 2020 11:50 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Spin State
Replies: 8
Views: 92

Re: Spin State

I don't think you will use it mathematically, but knowing how to find either the +1/2 or -1/2 spin state is important!
by Jacob Schwarz-Discussion 3I
Sun Nov 15, 2020 11:48 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8548
Views: 1474861

Re: Post All Chemistry Jokes Here

What did one ion say to the other?





I've got my ion you.
by Jacob Schwarz-Discussion 3I
Sun Nov 15, 2020 11:47 pm
Forum: Resonance Structures
Topic: bond length
Replies: 37
Views: 153

Re: bond length

No! You just need to know the concepts. For example, multiple bonds have a shorter bond length. Weaker bonds are longer. Lone pairs on neighboring atoms also repel each other, which then in turn weakens the bond.
by Jacob Schwarz-Discussion 3I
Sun Nov 15, 2020 11:42 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Oxidation Number
Replies: 8
Views: 90

Re: Oxidation Number

I would think of it like this:
If you have the formula NO3-, and you are asked for the oxidation number of N.
You know the final charge is -1 and you know the oxidation number of O is -2. So -2 times 3 is -6 and so the oxidation of N would 5 in order to get you back to the final output of -1
by Jacob Schwarz-Discussion 3I
Sun Nov 15, 2020 11:40 pm
Forum: Lewis Structures
Topic: Hydrogen Bonding
Replies: 12
Views: 62

Re: Hydrogen Bonding

This is because it needs to bond to something with a higher electronegativity rating like oxygen, nitrogen, or fluorine
by Jacob Schwarz-Discussion 3I
Sun Nov 15, 2020 11:39 pm
Forum: Ionic & Covalent Bonds
Topic: bond lengths
Replies: 9
Views: 55

Re: bond lengths

Double bonds are shorter because more bonding means more attraction. Therefore because double bonds have more bonds and more attraction, they are closer to each other with shorter bonds
by Jacob Schwarz-Discussion 3I
Mon Nov 09, 2020 10:48 am
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 337
Views: 139732

Re: Saying Thank You to Dr. Lavelle

Thank you Dr. Lavelle. You have seriously inspired me with your passion for chemistry, even despite the online environment. I appreciate you so much!!!
-Jacob Schwarz
by Jacob Schwarz-Discussion 3I
Sun Nov 01, 2020 11:31 pm
Forum: Photoelectric Effect
Topic: Lyman Series
Replies: 30
Views: 200

Re: Lyman Series

Yes, if they Lyman series is mentioned, you should assume n=1 as the final state.
by Jacob Schwarz-Discussion 3I
Sun Nov 01, 2020 11:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Participation Points [ENDORSED]
Replies: 62
Views: 1016

Re: Participation Points [ENDORSED]

Do the points get calculated weekly or once at the end of the quarter?
by Jacob Schwarz-Discussion 3I
Sun Nov 01, 2020 11:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Fall 2020 Midterm 1 Instructions
Replies: 20
Views: 1084

Re: Fall 2020 Midterm 1 Instructions

For the next midterm or the final, do I need to buy a webcam?
by Jacob Schwarz-Discussion 3I
Sun Nov 01, 2020 11:29 pm
Forum: Einstein Equation
Topic: E=hv vs E=hf
Replies: 15
Views: 120

Re: E=hv vs E=hf

They just don't want to confuse it with velocity so sometimes they use E=hf
by Jacob Schwarz-Discussion 3I
Sun Nov 01, 2020 11:28 pm
Forum: Einstein Equation
Topic: Solving Equations using E=hv
Replies: 6
Views: 83

Re: Solving Equations using E=hv

You would solve normally using E=hv and then divide by Avogadro's constant
by Jacob Schwarz-Discussion 3I
Sun Nov 01, 2020 11:27 pm
Forum: Einstein Equation
Topic: Sapling #1
Replies: 6
Views: 82

Re: Sapling #1

It's 100E because there are 100 photons-each photon adds more energy-therefore 100E
by Jacob Schwarz-Discussion 3I
Sun Nov 01, 2020 11:25 pm
Forum: *Black Body Radiation
Topic: Midterm 1
Replies: 15
Views: 291

Re: Midterm 1

Dr. Lavelle said not to worry about it. It wasn't on my midterm and I believe he said it wouldn't be on any of them
by Jacob Schwarz-Discussion 3I
Sun Nov 01, 2020 11:24 pm
Forum: DeBroglie Equation
Topic: Diffraction Pattern
Replies: 9
Views: 105

Re: Diffraction Pattern

My interpretation was that a diffraction pattern is caused by waves!!!
by Jacob Schwarz-Discussion 3I
Sun Nov 01, 2020 11:21 pm
Forum: Administrative Questions and Class Announcements
Topic: Sapling access code
Replies: 3
Views: 63

Re: Sapling access code

Where did you order it to? I ordered it to the Ackerman union and it worked for me.
by Jacob Schwarz-Discussion 3I
Sun Nov 01, 2020 11:18 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 337
Views: 139732

Re: Saying Thank You to Dr. Lavelle

Dr. Lavelle,
I know you have an insane amount of students and to make it even harder, you are in an online environment. I can't imagine how many emails and daily notifications you have to respond to. Yet, you always have a smile on your face. Just wanted to say thank you! Appreciate you Dr. Lavelle!!
by Jacob Schwarz-Discussion 3I
Sun Nov 01, 2020 11:16 pm
Forum: Properties of Light
Topic: Study Advice
Replies: 50
Views: 295

Re: Study Advice

It really depends. Doing the step up sessions have helped me to refine my skills but I usually already know the content. The more help and practice you do, the easier the midterms will be.
by Jacob Schwarz-Discussion 3I
Sun Nov 01, 2020 11:12 pm
Forum: Properties of Light
Topic: Speed of light
Replies: 25
Views: 158

Re: Speed of light

Lavelle is okay with 3*10^8! You don't need to worry about 2.999 he wants us to stick with 3 (:
by Jacob Schwarz-Discussion 3I
Sun Nov 01, 2020 11:12 pm
Forum: Properties of Light
Topic: Speed of light
Replies: 25
Views: 158

Re: Speed of light

Lavelle is okay with 3*10^8! You don't need to worry about 2.999 he wants us to stick with 3 (:
by Jacob Schwarz-Discussion 3I
Mon Oct 19, 2020 2:23 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Helpful Wave Function Video!
Replies: 6
Views: 60

Re: Helpful Wave Function Video!

Thank you so much!!! This really helped me understand how light can follow the classical wave model and at the same time follow the quantum model.
by Jacob Schwarz-Discussion 3I
Mon Oct 19, 2020 2:20 am
Forum: Properties of Electrons
Topic: Energy levels
Replies: 8
Views: 62

Re: Energy levels

Hey!!
As you get farther away from the nucleus, it gets easier for electrons to jump energy levels. It is hardest to excite electrons in the ground state but as you go up energy levels it gradually gets easier.
by Jacob Schwarz-Discussion 3I
Mon Oct 19, 2020 2:16 am
Forum: *Black Body Radiation
Topic: Black Body Radiation
Replies: 13
Views: 96

Re: Black Body Radiation

Hey, I don't think you need to worry about this too much. Lavelle does cover Black Body Radiation yet he does explicitly acknowledge that we don't need to be too specific on the memorization of everything regarding this concept. I think it is important to remember that this type of radiation is abou...
by Jacob Schwarz-Discussion 3I
Sun Oct 18, 2020 9:25 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 203
Views: 1298

Re: How are you studying?

Hey,
I have been studying by obviously watching the lectures but on top of that the audio-visual concepts help a ton. By doing those it really reviews the lectures and going to his office hours helps review the content a lot. The more practice you have, the easier it will be.
by Jacob Schwarz-Discussion 3I
Sun Oct 18, 2020 9:21 pm
Forum: Administrative Questions and Class Announcements
Topic: Where can I buy a webcam for a reasonable price?
Replies: 60
Views: 1102

Re: Where can I buy a webcam for a reasonable price?

Amazon has some great ones for $14.99 or even cheaper. I also saw some on Instagram ads for $10.
by Jacob Schwarz-Discussion 3I
Sun Oct 11, 2020 10:47 pm
Forum: Empirical & Molecular Formulas
Topic: Finding Empirical Formula
Replies: 10
Views: 100

Re: Finding Empirical Formula

This is because 1.33 is not a whole number. Therefore, when he had the ratio 1:1.33:1, he had to multiply every number by 3 to get the empirical formula of 3:4:3(which all contain whole numbers).
by Jacob Schwarz-Discussion 3I
Sun Oct 11, 2020 10:45 pm
Forum: Significant Figures
Topic: SIG FIGS
Replies: 13
Views: 112

SIG FIGS

Will each problem tell you how many sig figs to use?
If the question has 4 sig figs, should the answer also have 4 sig figs?
by Jacob Schwarz-Discussion 3I
Sun Oct 11, 2020 10:40 pm
Forum: Molarity, Solutions, Dilutions
Topic: sapling hw #7
Replies: 17
Views: 165

Re: sapling hw #7

Hey!
For this problem, you know that 32.5% of the sln. is calcium chloride. Therefore, the other 67.5% of the sln. must be H20. If the sln. is 590.1g, then 32.5% of 590.1 is 191.78g of CaCl2. Then, after subtracting that mass from 590.1, you get the grams of H20 that make up the sln.
by Jacob Schwarz-Discussion 3I
Sun Oct 11, 2020 10:33 pm
Forum: Limiting Reactant Calculations
Topic: Sapling HW week 1#10
Replies: 2
Views: 42

Re: Sapling HW week 1#10

All of your steps so far have been correct! However, to find the theoretical yield you need to convert to grams of 3-methyl-3-hexanol. To do this, you need to find the molar mass of 3-methyl-3-hexanol, and then convert the moles of 2 butanone(the limiting reactant) to grams of 3-methyl-3-hexanol. To...
by Jacob Schwarz-Discussion 3I
Sun Oct 11, 2020 10:26 pm
Forum: Balancing Chemical Reactions
Topic: Order of Balancing Rxns
Replies: 23
Views: 116

Re: Order of Balancing Rxns

Hey Jerry! When it comes to balancing reactions, I would definitely start with the element that occurs the least. From there, I would recommend keeping two columns(one for products and one for reactants) to keep it organized and keep track of the elements as you go through with balancing. Keep track...

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