Search found 68 matches

by Annette Fishman
Mon Jan 25, 2021 9:37 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Rounding E Values in ICE charts
Replies: 17
Views: 49

Re: Rounding E Values in ICE charts

If the K value is less than 1.0 x 10^-3, then the x can be dropped. Lavelle prefers we drop it at 1.0 x 10^-4 to be more safe, but essentially its when the K value is so small it doesn't affect the overall concentration.
by Annette Fishman
Mon Jan 25, 2021 9:32 am
Forum: Student Social/Study Group
Topic: Favorite Music
Replies: 57
Views: 129

Re: Favorite Music

I've been super all over the place lately. Kanye West, The Weeknd, Kid Cudi, Tyler the Creator, Lana del Rey, Frank Ocean, PATD, Fall Out Boy. Anything that hits in that specific moment in time.
by Annette Fishman
Mon Jan 25, 2021 9:30 am
Forum: Student Social/Study Group
Topic: Comfort Movies
Replies: 126
Views: 280

Re: Comfort Movies

Any Disney classic. The Parent Trap is a great movie. CAMP ROCK! These immediately take me back.
by Annette Fishman
Mon Jan 25, 2021 9:27 am
Forum: Student Social/Study Group
Topic: Exam Duration
Replies: 7
Views: 21

Re: Exam Duration

Same as last quarter, the TAs would probably want us to join 5-10 minutes early to set up, check papers, and get everybody situated. Then, once you open up Respondus and click the timer, the 50 minutes is the time limit in which you can take the test.
by Annette Fishman
Mon Jan 25, 2021 9:25 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: When to use ICE box
Replies: 23
Views: 53

Re: When to use ICE box

The ICE box is used to find unknown concentrations at equilibrium or initial given the concentration of one of the reactants or products.
by Annette Fishman
Tue Jan 12, 2021 12:51 pm
Forum: Student Social/Study Group
Topic: New Year Resolutions?
Replies: 54
Views: 174

Re: New Year Resolutions?

Be more easy on myself. That being said, try to wakeup early everyday. Stay on top of my lectures, zoom calls. Maintain my time a bit better with a planner. Bike at least four times a week. Work hard, play hard :)
by Annette Fishman
Tue Jan 12, 2021 12:47 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Left vs. Right
Replies: 29
Views: 95

Re: Left vs. Right

These both can be used interchangeably! It is important to note that no reaction actually "shifts". According to Le Chatelier, the position of equilibrium will move in such a way as to counteract the change.
by Annette Fishman
Tue Jan 12, 2021 12:41 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 1 Assignment
Replies: 17
Views: 79

Re: Week 1 Assignment

Sapling homework is mandatory. So the week 1 assignment for sapling is DUE the Sunday of week 2. All of the problems from the textbook are optional, and normally are extra practice plus they commonly show up on midterms and final exams.
by Annette Fishman
Tue Jan 12, 2021 12:38 pm
Forum: Administrative Questions and Class Announcements
Topic: Sapling Homework
Replies: 7
Views: 50

Re: Sapling Homework

Make sure to log in to Sapling through CCLE. Once you're there, click "use credit" and then it should work.
by Annette Fishman
Tue Jan 12, 2021 12:32 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Getting two positive x values when using quadratic
Replies: 43
Views: 160

Re: Getting two positive x values when using quadratic

I've run into this problem when completing the Sapling, but even though they are both positive, both shouldn't make sense in the context of the problem. Some people above have noticed that the correct x value is commonly the smaller one. To be sure, though, it is necessary to check for yourself.
by Annette Fishman
Tue Jan 12, 2021 12:29 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q and K relationship
Replies: 12
Views: 42

Re: Q and K relationship

It is also important to note this relationship between Q and K. Q is a quantity that changes as a reaction system approaches equilibrium. K is the numerical value of Q at the "end" of the reaction, when equilibrium is reached. If Q is less than K the reaction will shift right If Q is great...
by Annette Fishman
Tue Jan 12, 2021 12:24 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Clarification of terminology
Replies: 15
Views: 96

Re: Clarification of terminology

All these phrases mean the same thing. You have to take into consideration too that nothing in the chemical reaction is actually "shifting", that is just simply the terminology.
by Annette Fishman
Thu Jan 07, 2021 7:12 pm
Forum: Student Social/Study Group
Topic: Advice for someone who didn't take 14A with professor Lavelle
Replies: 61
Views: 261

Re: Advice for someone who didn't take 14A with professor Lavelle

In my opinion, watching lectures on the day they come out is the way to go. At one point, I was behind on fourteen lectures for a midterm, and it is almost impossible cramming that much. Asynchronous classes make it very easy to procrastinate, but promise me it will be way easier to follow along as ...
by Annette Fishman
Thu Jan 07, 2021 7:09 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Gas Constant (R)
Replies: 12
Views: 66

Re: Gas Constant (R)

In this class, R is 8.314 J·K^-1·mol^-1. It can be found on the formula sheet on Lavelle's website.
by Annette Fishman
Thu Jan 07, 2021 7:07 pm
Forum: Administrative Questions and Class Announcements
Topic: Lecture Format
Replies: 22
Views: 119

Re: Lecture Format

Lavelle lectures are pre-recorded and posted on their assigned date (every other day of the week). You must keep yourself accountable to watch these. Discussion sections are optional, but they are helpful as you can ask any question you need. Sapling is mandatory homework you are graded on. Hope thi...
by Annette Fishman
Thu Jan 07, 2021 7:04 pm
Forum: Administrative Questions and Class Announcements
Topic: Sapling Assignments
Replies: 26
Views: 140

Re: Sapling Assignments

Sapling is mandatory homework, due dates are posted on there too. Textbook problems are optional and given as additional help if needed (they show up on exams sometimes)
by Annette Fishman
Thu Dec 03, 2020 1:30 pm
Forum: Ionic & Covalent Bonds
Topic: Polar and Nonpolar
Replies: 28
Views: 176

Re: Polar and Nonpolar

It becomes way easier when you draw the molecule and draw out the vectors to signify the dipoles! If they cancel out, the molecule is nonpolar.
by Annette Fishman
Thu Dec 03, 2020 1:26 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Best Formal Charge Equations
Replies: 24
Views: 133

Re: Best Formal Charge Equations

FC = valence electrons - number of dots - number of bonds/lines.
by Annette Fishman
Thu Dec 03, 2020 1:25 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 13
Views: 115

Re: Bond Angles

First step is to draw the Lewis diagram to visualize the atom. Bond angle is determined by examining the number of lone pair electrons. This is because there is election repulsion, causing the bond angles to be slightly smaller. And as Lavelle said, we don't have to memorize these changes in angles,...
by Annette Fishman
Thu Dec 03, 2020 1:19 pm
Forum: General Science Questions
Topic: # of chem posts
Replies: 27
Views: 323

Re: # of chem posts

December 6 - 45
December 13 - 50 posts total
by Annette Fishman
Thu Dec 03, 2020 12:36 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: polar v nonpolar molecules
Replies: 30
Views: 154

Re: polar v nonpolar molecules

Polar molecules occur when there is an electronegativity difference between the bonded atoms, whereas nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out.
by Annette Fishman
Thu Dec 03, 2020 12:34 pm
Forum: Hybridization
Topic: Pi Bonds Cannot Rotate
Replies: 23
Views: 167

Re: Pi Bonds Cannot Rotate

Rotation around a single bond occurs readily, while rotation around a double bond is restricted. The pi bond prevents rotation because of the electron overlap both above and below the plane of the atoms.
by Annette Fishman
Thu Dec 03, 2020 12:31 pm
Forum: Administrative Questions and Class Announcements
Topic: 14B vs 14A
Replies: 12
Views: 167

Re: 14B vs 14A

I believe that it will be mostly the same. We will continue to use Sapling. I think the textbook we bought was for both classes, so just an continuation.
by Annette Fishman
Thu Dec 03, 2020 12:29 pm
Forum: Naming
Topic: Oxidation State
Replies: 4
Views: 38

Re: Oxidation State

An oxidation state is the total number of electrons that an atom either gains or loses in order to form a chemical bond with another atom. :)
by Annette Fishman
Thu Dec 03, 2020 12:23 pm
Forum: Student Social/Study Group
Topic: How are you?
Replies: 117
Views: 782

Re: How are you?

Honestly, overwhelmed. On top of UCLA classes, I am working a job that I go to right after I finish my classes. I close almost everyday, so I come home at 10:30. I just always feel like I have absolutely no time for anything, and December is one of those months that keep me up all night. Scared for ...
by Annette Fishman
Sun Nov 29, 2020 10:03 pm
Forum: Significant Figures
Topic: 40. versus 40
Replies: 23
Views: 181

Re: 40. versus 40

40. has 2 sig figs while 40 only has one! All above answers are correct :)
by Annette Fishman
Sun Nov 29, 2020 10:02 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 182
Views: 106809

Re: Reading the textbook [ENDORSED]

I think the textbook is extremely helpful in clearing up topics that weren't clearly defined in lectures. Plus, lectures are super long and have a ton of information, while the book condenses it. It is way easier to follow in my opinion!
by Annette Fishman
Sun Nov 29, 2020 10:00 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining Molecular Shape
Replies: 9
Views: 50

Re: Determining Molecular Shape

The type of bond doesn't affect molecular geometry. However, it might change the angle between the elements (as double bonds are tighter etc), but when asked, we don't take this into account. You can think about it that way conceptually, but it doesn't change the actual answer!
by Annette Fishman
Sun Nov 29, 2020 9:56 pm
Forum: Lewis Structures
Topic: Tips on drawing Lewis structures
Replies: 20
Views: 148

Re: Tips on drawing Lewis structures

Best advice is to count the electrons first in order to fill the octets for all the atoms (as they are most stable that way).
by Annette Fishman
Sun Nov 29, 2020 9:53 pm
Forum: Student Social/Study Group
Topic: Week 8/9 Thoughts/Worries
Replies: 66
Views: 484

Re: Week 8/9 Thoughts/Worries

I feel relatively okay in this class - tons of resources, great textbook, descriptive videos. The only issue with me is that I constantly fall behind on lectures and have to do a ton of catching up. First midterm was good, but my second I didn't perform my best. So I am a little anxious about the fi...
by Annette Fishman
Sat Nov 28, 2020 2:59 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sapling Wk8 Q. 18, Determining Molecular Shape
Replies: 10
Views: 70

Re: Sapling Wk8 Q. 18, Determining Molecular Shape

Molecules are read left to right to be given the order!
by Annette Fishman
Sat Nov 28, 2020 2:59 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sapling Wk8 Q. 18, Determining Molecular Shape
Replies: 10
Views: 70

Re: Sapling Wk8 Q. 18, Determining Molecular Shape

Molecules are read left to right to be given the order!
by Annette Fishman
Sat Nov 28, 2020 2:57 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polar vs. nonpolar bonds/molecules
Replies: 8
Views: 79

Re: Polar vs. nonpolar bonds/molecules

A bond is polar because two atoms have different electronegativities. However, when these two atoms (or more) are symmetric and have zero lone pairs, this indicates that this molecule has linear geometry. The bonds are symmetric, so their dipoles cancel out. Thus, the molecule is nonpolar. On the ot...
by Annette Fishman
Mon Nov 23, 2020 12:51 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: bond angle tips
Replies: 10
Views: 64

Re: bond angle tips

Best bet is to memorize them. We will continue to draw molecules and will have to know what they look like to look at its chemical properties. Luckily, its not that much and is typically straightforward once you get the hang of it.
by Annette Fishman
Mon Nov 23, 2020 12:49 pm
Forum: Ionic & Covalent Bonds
Topic: Polar Bonds
Replies: 19
Views: 111

Re: Polar Bonds

I look at electronegativity and the presence of lone pairs in the Lewis structure. It is extremely helpful to also draw the atom and indicate all the lone pairs. If the molecule is asymmetrical with bonding, electrons, etc, then it is always non-polar because that means that one side is slightly mor...
by Annette Fishman
Mon Nov 23, 2020 12:45 pm
Forum: Lewis Structures
Topic: Dot stucture
Replies: 11
Views: 66

Re: Dot stucture

Counting the valence electrons is the first step, make sure to account for the cations/anions. Next, I write the most electronegative atom in the middle and draw bonds to make sure it has an octet (or lone pairs). I tend to use trial and error, but after practice you know how to draw basic atoms and...
by Annette Fishman
Mon Nov 23, 2020 12:42 pm
Forum: Student Social/Study Group
Topic: Studying From Home
Replies: 91
Views: 496

Re: Studying From Home

I have the same struggle, especially this quarter. I make sure to use an agenda, because I find satisfaction in crossing of assignments that I have completed. I also try to make sure my work environment is clean (as well as my room). Sometimes I facetime my friends and we both do homework at the sam...
by Annette Fishman
Mon Nov 16, 2020 9:02 am
Forum: Ionic & Covalent Bonds
Topic: London Dispersion Forces
Replies: 11
Views: 77

Re: London Dispersion Forces

The London dispersion force is the weakest intermolecular force. The London dispersion force is a temporary attractive force that results when the electrons in two atoms occupy positions that make the atoms form temporary dipoles.
by Annette Fishman
Sun Nov 15, 2020 9:40 am
Forum: Resonance Structures
Topic: Formal Charge influence on Resonance Structure
Replies: 4
Views: 18

Re: Formal Charge influence on Resonance Structure

The formal charge of an atom in a molecule is the hypothetical charge the atom would have if we could redistribute the electrons in the bonds evenly between the atoms. The smallest formal charge is most favorable because it is considered to be the most stable.
by Annette Fishman
Sun Nov 15, 2020 9:33 am
Forum: Lewis Structures
Topic: Drawing Lewis Structures on Midterm
Replies: 31
Views: 162

Re: Drawing Lewis Structures on Midterm

Instructions should be clear, but if not, least formal charge is the way to go. It is the most accurate, but I'd make sure to recognize multiple structures in case.
by Annette Fishman
Sun Nov 15, 2020 9:23 am
Forum: Student Social/Study Group
Topic: Exercising Our Minds and Bodies
Replies: 103
Views: 516

Re: Exercising Our Minds and Bodies

I go biking on my free time around my neighborhood when I can. Sometimes, I go on the trampoline or just take a walk. All of these help me clear my mind and relax a little bit
by Annette Fishman
Sun Nov 15, 2020 9:21 am
Forum: Student Social/Study Group
Topic: grade worries
Replies: 110
Views: 1174

Re: grade worries

Yes, I am always super anxious about my grades, and sometimes I feel super disconnected from UCLA so it gets hard to learn. These past few weeks have been back to back midterms so I haven't had as much time to study as for the first midterm, which means cramming for me til Tuesday morning. But just ...
by Annette Fishman
Fri Nov 06, 2020 8:50 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: 4s before 3d Orbital
Replies: 11
Views: 88

Re: 4s before 3d Orbital

The energy levels that are lowest are filled up first. Based on experimental data, it was found that the 4S shell has less energy than the 3D shell, so that's why it is filled up first. So, when writing out the electron configuration, you must keep this in mind or you will get the answer incorrect.
by Annette Fishman
Fri Nov 06, 2020 8:47 am
Forum: Bond Lengths & Energies
Topic: Radicals
Replies: 5
Views: 157

Re: Radicals

A radical is a molecule that contains at least one unpaired electron. In organic chemistry, it is more specified that radical stability increases in the order methyl < primary < secondary < tertiary, but I'm not sure how much of this we actually need to know. The stability of radicals on the carbon ...
by Annette Fishman
Fri Nov 06, 2020 8:40 am
Forum: Ionic & Covalent Bonds
Topic: Coulombs equation
Replies: 4
Views: 131

Re: Coulombs equation

Coulomb's law describes the force between two charged particles. This Coulomb force is extremely basic, since most charges are due to point-like particles. It is responsible for all electrostatic effects and underlies most macroscopic forces. This equation is given by F(e)=(kQ1Q2)/r^2 (unit in Newto...
by Annette Fishman
Fri Nov 06, 2020 8:34 am
Forum: Student Social/Study Group
Topic: Test Anxiety
Replies: 62
Views: 350

Re: Test Anxiety

I take a few deep breaths. I get less anxious when I know that I studied to my fullest potential, so it puts me in the mindset that I am going to try my BEST. When I start my test and am unable to do the first few questions that makes me more stressed out. So I either take it slow or take the test b...
by Annette Fishman
Fri Nov 06, 2020 8:30 am
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 178
Views: 883

Re: Favorite TV shows

Breaking Bad, Orange is the New Black, How to get Away with Murder, Euphoria! some of my favorites
by Annette Fishman
Thu Nov 05, 2020 10:25 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Why is the 4s state filled before the 3d state?
Replies: 14
Views: 123

Re: Why is the 4s state filled before the 3d state?

The energy levels that are lowest are filled up first. Based on experimental data, it was found that the 4S shell has less energy than the 3D shell, so that's why it is filled up first.
by Annette Fishman
Thu Nov 05, 2020 10:22 am
Forum: Ionic & Covalent Bonds
Topic: Homework due date
Replies: 49
Views: 339

Re: Homework due date

Sapling homework is due at 12:59 midnight on Sundays! He also uploaded the new Sapling for week 5 and 6, so it is due next Sunday night. Hope that helps!
by Annette Fishman
Mon Nov 02, 2020 8:36 am
Forum: Electronegativity
Topic: Periodic Table Trend
Replies: 37
Views: 387

Re: Periodic Table Trend

The trends for ionization energy and electronegativity are the same. They increase in electronegativity/ionization energy as you go across a row and up a column. Fluorine is the most electronegative element. This is because for ionization energy, or the energy to remove an electron, the elements wit...
by Annette Fishman
Mon Nov 02, 2020 8:28 am
Forum: Student Social/Study Group
Topic: Forming Virtual Study Group
Replies: 31
Views: 172

Re: Forming Virtual Study Group

I would love to be a part of it! My email is anfishm@gmail.com :)
by Annette Fishman
Mon Nov 02, 2020 8:25 am
Forum: Properties of Electrons
Topic: Sapling #24
Replies: 7
Views: 72

Re: Sapling #24

I was confused on this one as well, but I realized that the waves must be continuous. So as Juliana mentioned above, picture the image of the wave side by side, and if its continuous, then you know that the wave is compatible.
by Annette Fishman
Mon Nov 02, 2020 8:22 am
Forum: Balancing Chemical Reactions
Topic: Balancing Equations Coefficient Question
Replies: 15
Views: 108

Re: Balancing Equations Coefficient Question

Yes, you should multiply your coefficients by the same number in order to get whole ratios. That number should be the smallest coefficient possible, or you'll need to simplify. For example, if the coefficient is 1.5, you'd want to multiply by 2. If 3.33, multiply by 3. When you put it in fraction fo...
by Annette Fishman
Mon Nov 02, 2020 8:18 am
Forum: Student Social/Study Group
Topic: Halloween!!!
Replies: 54
Views: 332

Re: Halloween!!!

Happy Halloween!! I went to a very small Halloween "get-together" where I watched scary movies and ate candy :)
by Annette Fishman
Sun Oct 25, 2020 11:22 pm
Forum: Properties of Light
Topic: Webcam for midterm
Replies: 6
Views: 63

Re: Webcam for midterm

I'm pretty sure Professor Lavelle sent out an email regarding the webcam and all of its nuances later in Week 2. Additionally, there's an entire page on Chemistry Community answering a ton of those questions. My TA told my session that a cell phone would be okay as well!
by Annette Fishman
Sun Oct 25, 2020 11:16 pm
Forum: Student Social/Study Group
Topic: Textbook sections on the midterm?
Replies: 3
Views: 36

Re: Textbook sections on the midterm?

As mentioned above, Lavelle said the MT covers up to 1.D.2 in the textbook and to Week 3 Wednesday lecture. Quantum numbers, s, p, d-orbitals, etc., are not on MT 1.
by Annette Fishman
Sun Oct 25, 2020 11:05 pm
Forum: SI Units, Unit Conversions
Topic: Do I need to do very single textbook question on the syllabus?
Replies: 34
Views: 274

Re: Do I need to do very single textbook question on the syllabus?

Like everybody has mentioned above, it's your call. They aren't collected, but they help you prepare for exams and the coming up midterm. If you look at the syllabus, there are multiple practice problems Professor Lavelle recommended. Whatever feels best for you!
by Annette Fishman
Sun Oct 25, 2020 11:02 pm
Forum: Properties of Electrons
Topic: rydberg equation
Replies: 8
Views: 64

Re: rydberg equation

In the Rydberg equation, n1 represents the lower energy level and the n2 value represents the higher energy level. n2 has to be greater than n1 (positive results)
by Annette Fishman
Sun Oct 18, 2020 12:57 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 203
Views: 1296

Re: How are you studying?

Studying is subjective and depends on how you work best personally. For me, I watch the lectures while taking notes to highlight key points. I also do the Sapling along with homework problems if I need additional help understanding a concept. Reading the textbook as well!! Use a planner or calendar ...
by Annette Fishman
Sun Oct 18, 2020 9:49 am
Forum: Student Social/Study Group
Topic: Discussion 2A GroupMe
Replies: 2
Views: 43

Re: Discussion 2A GroupMe

Thank you!!!!
by Annette Fishman
Sun Oct 18, 2020 9:47 am
Forum: Administrative Questions and Class Announcements
Topic: UCLA Store Updates on Ebook/Sapling access card
Replies: 16
Views: 147

Re: UCLA Store Updates on Ebook/Sapling access card

I ordered my Sapling textbook with the shipping option about a week before school started, and I received it in the middle of the second week of school. I kept checking the UCLA bookstore site for when the status of the book switched from "processing" to "shipping". They also sen...
by Annette Fishman
Sun Oct 18, 2020 9:43 am
Forum: General Science Questions
Topic: Writing Formulas
Replies: 10
Views: 78

Re: Writing Formulas

Equations should generally be given to us, but for our future in chemistry, it is best to start becoming familiar as well as memorizing them.
by Annette Fishman
Sun Oct 18, 2020 9:39 am
Forum: Photoelectric Effect
Topic: External Camera
Replies: 11
Views: 115

Re: External Camera

I agree, it depends on your TA and the information that they told you. Mine suggested a separate USB webcam but said that a phone camera would do the trick as well. This is so that he could have a few of our keyboard the entire time.
by Annette Fishman
Fri Oct 09, 2020 1:06 pm
Forum: Empirical & Molecular Formulas
Topic: Calculation Errors for Empirical Formulas
Replies: 10
Views: 67

Re: Calculation Errors for Empirical Formulas

The problems are generally made so that there is a clear way in which one should round. In between your calculations, make sure not to round until the very last step so that you use exact values.
by Annette Fishman
Fri Oct 09, 2020 12:37 pm
Forum: Student Social/Study Group
Topic: Discussion 2A GroupMe
Replies: 2
Views: 43

Discussion 2A GroupMe

I apologize if this question has been asked before, but is there a specific GroupMe for discussion 2A for Chem 14A? Thank you so much :)
by Annette Fishman
Fri Oct 09, 2020 12:23 pm
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Community Participation Points
Replies: 5
Views: 51

Re: Chemistry Community Participation Points

It doesn't only have to be brand new posts with questions. I think if you don't have something to ask, then Professor Lavelle just expects us to help each other in Chemistry Community so that it becomes a safe space for people to learn from each other. The five per week could also include responses ...
by Annette Fishman
Fri Oct 09, 2020 12:13 pm
Forum: SI Units, Unit Conversions
Topic: Mole notation
Replies: 7
Views: 69

Re: Mole notation

They are interchangeable and are equivalent in value. I personally use g/mol because I think the negative exponent doesn't look as "clean", but it comes down to what you feel most comfortable with.
by Annette Fishman
Thu Oct 08, 2020 5:42 pm
Forum: SI Units, Unit Conversions
Topic: Sapling Assignment 1 Question 6
Replies: 16
Views: 129

Re: Sapling Assignment 1 Question 6

You have to convert the grams into moles using the molar mass. You have 2.92 grams of CuNO3 so you find the molar mass of CuNO3 and divide those two values to find moles: 2.92/125.55 = 0.023 moles of CuNO3. grams/(grams/mol) = mole From here you can easily find the volume by plugging in known values...

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