## Search found 65 matches

Sun Jan 17, 2021 2:04 pm
Forum: Student Social/Study Group
Topic: Exercising Our Minds and Bodies
Replies: 103
Views: 507

### Re: Exercising Our Minds and Bodies

One of my favorite activities to do to exercise my mind and bodies is to dance because I like to test my creativity while also working out my body.
Sun Jan 17, 2021 1:57 pm
Forum: Ideal Gases
Topic: Inverse Kc
Replies: 29
Views: 61

### Re: Inverse Kc

To state, the inverse of Kc is basically the reciprocal of Kc.
Sun Jan 17, 2021 1:43 pm
Forum: Student Social/Study Group
Topic: New Joke Chain
Replies: 28
Views: 92

### Re: New Joke Chain

I really wanted to post a chemistry joke, but I could not ZINC of one.
Sun Jan 17, 2021 1:40 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sapling Question
Replies: 4
Views: 19

### Re: Sapling Question

Initially, I think your reasoning is right by find the Kc value before the concentration of NO is modified. But after finding the Kc value, you have to keep the molar concentrations of both reactants. You have to keep in mind how adding the concentration of NO affects the equilibrium.
Sun Jan 17, 2021 1:33 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Using the ICE table
Replies: 32
Views: 79

### Re: Using the ICE table

ICE table is applied to both reactions that deal with concentrations and partial pressure.
Sun Jan 10, 2021 2:54 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Picking Value when doing Quadratic Equation
Replies: 10
Views: 29

### Re: Picking Value when doing Quadratic Equation

You cannot have negative molarity, so you choose the positive value that you get from the quadratic equation.
Thu Jan 07, 2021 4:38 pm
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Posts in 14B [ENDORSED]
Replies: 113
Views: 1781

### Re: Chemistry Posts in 14B[ENDORSED]

Since the number of posts adds onto last quarter (which was 50 in 14A), would that technically mean that we need 55 posts by this Sunday? (technically)
Thu Jan 07, 2021 4:30 pm
Forum: Administrative Questions and Class Announcements
Replies: 7
Views: 80

Some UAs encourage that they want students to come to their sessions or they can email it to you personally.
Thu Jan 07, 2021 4:28 pm
Forum: General Science Questions
Topic: mole vs. M
Replies: 16
Views: 106

### Re: mole vs. M

Mol is different from M because M is used to measure concentration in the units M * L^-1.
Wed Jan 06, 2021 10:05 pm
Forum: Ideal Gases
Topic: Sapling Homework
Replies: 22
Views: 171

### Re: Sapling Homework

In response to Laura,
You access the Chem 14B homework under current courses (if you bought the course or use credit to get it).
Wed Jan 06, 2021 10:02 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: names for reaction quotient Q
Replies: 19
Views: 68

### Re: names for reaction quotient Q

These are all the reaction quotients but they apply to different units. Qc deals with molar concentration, so its (mol/L). Qp deals with partial pressure, so its in atm.
Wed Dec 16, 2020 1:17 pm
Forum: Student Social/Study Group
Topic: Staying Motivated
Replies: 20
Views: 117

### Re: Staying Motivated

I find myself struggling to stay motivated as well due to the academic setbacks I experienced so far, especially in this class alone. To stay more motivated, I believe that taking breaks and surrounding yourself with a great support system will definitely boost your morale.
Wed Dec 16, 2020 1:14 pm
Forum: Student Social/Study Group
Topic: Changing Study Habits
Replies: 35
Views: 179

### Re: Changing Study Habits

This quarter I feel that my study habits were decent because I went to UA sessions, but I feel that I could improve better by doing the textbook problems consistently everyday and reading more of the textbook.
Wed Dec 16, 2020 1:13 pm
Forum: Student Social/Study Group
Topic: Winter Break Plans
Replies: 32
Views: 140

### Re: Winter Break Plans

My plans for the winter break are to catch up on sleep and to play more video games.
Wed Dec 16, 2020 1:12 pm
Forum: Student Social/Study Group
Topic: Anxiety
Replies: 38
Views: 229

### Re: Anxiety

In order to manage my anxiety, I tend to exercise by taking a quick jog so that I can get my mind off academics.
Wed Dec 16, 2020 1:10 pm
Forum: Student Social/Study Group
Replies: 29
Views: 208

I believe that grades would be out by Saturday according to Lavelle's email.
Sun Dec 06, 2020 6:44 pm
Forum: Administrative Questions and Class Announcements
Topic: CCLE fixed?
Replies: 19
Views: 98

### Re: CCLE fixed?

As of right now (6:44 p.m.), logging into CCLE has worked for me.
Sun Dec 06, 2020 6:43 pm
Forum: Conjugate Acids & Bases
Topic: studying
Replies: 7
Views: 259

### Re: studying

Watching youtube videos like O-chem tutor really helps and clarifies a lot of confusion. It also helps to memorize all the strong acids and bases so that you can immediately recognize them.
Sun Dec 06, 2020 6:39 pm
Forum: Naming
Topic: Naming Coordination Compounds
Replies: 5
Views: 66

### Re: Naming Coordination Compounds

Aside from the tips listed above, one tip that has helped me when naming coordination compounds is to write out the different parts of the ligands and cations in different segments because it helps me stay organized and makes the work less chaotic to work with.
Hope this helps!
Sun Dec 06, 2020 3:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Partial Credit on the Final
Replies: 6
Views: 67

### Re: Partial Credit on the Final

I feel like the questions that would have partial credit would be the calculation-based problems, or any problem that is related to the topics in the first midterm.
Sun Dec 06, 2020 3:44 pm
Forum: Student Social/Study Group
Topic: Practice Exams
Replies: 3
Views: 14

### Re: Practice Exams

Not only practice exams will help, but doing and reviewing all the textbook problems would definitely help a lot!
Sun Nov 29, 2020 10:50 pm
Forum: Octet Exceptions
Topic: PCl5 expanded octet question
Replies: 6
Views: 45

### Re: PCl5 expanded octet question

Phosphorus is an exception to the octet rule because it is further down in the periodic table, allowing it to hold more than 8 electrons in octet,
Sun Nov 29, 2020 10:46 pm
Forum: Student Social/Study Group
Topic: Tips for Staying Focused
Replies: 52
Views: 524

### Re: Tips for Staying Focused

In order to stay focused, I like to take things one step at a time so that I do not get overwhelmed with classes. It is also important to do your favorite hobbies so that you can destress.
Sun Nov 29, 2020 10:40 pm
Forum: Student Social/Study Group
Topic: Midterm Partial Credit
Replies: 19
Views: 229

### Re: Midterm Partial Credit

There is no partial credit for the second midterm because the questions were more conceptual rather than calculation based.
Sun Nov 29, 2020 1:02 am
Forum: Student Social/Study Group
Topic: Week 8/9 Thoughts/Worries
Replies: 66
Views: 481

### Re: Week 8/9 Thoughts/Worries

I feel there are definitely many rooms for improvement in terms of how I study and prepare for the exams. I also feel very comfortable in this class because of the extensive resources available, especially the UA sessions.
Sun Nov 29, 2020 12:55 am
Forum: Sigma & Pi Bonds
Topic: Delocalized π bonds
Replies: 6
Views: 29

### Re: Delocalized π bonds

Resonance is the only way in which delocalized pi bonds can occur because the different structures implies different electron placements.
Sun Nov 22, 2020 4:51 pm
Forum: Administrative Questions and Class Announcements
Topic: final
Replies: 5
Views: 26

### Re: final

How many questions would be on the final? Will it contain questions with or without partial credit, or both?
Sun Nov 22, 2020 4:27 pm
Forum: Resonance Structures
Topic: Resonance Structures and Energy
Replies: 21
Views: 98

### Re: Resonance Structures and Energy

The lewis structure with the lowest amount if energy and the structure where the negative formal charge is on the most electronegative atom will always be preferred.
Sun Nov 22, 2020 4:25 pm
Forum: Bond Lengths & Energies
Topic: Bond Length vs Size of Molecule
Replies: 14
Views: 141

### Re: Bond Length vs Size of Molecule

When dealing with the boiling point, the bigger the size of the molecule, the more electron distortion that it can experience, thus resulting in more dipole moments. It is important to note the difference between IMFs and covalent bonds.
Sun Nov 22, 2020 4:02 pm
Forum: Student Social/Study Group
Topic: How to relax after midterms
Replies: 54
Views: 262

### Re: How to relax after midterms

After midterms, I feel that the best way to relax is to do your favorite hobbies because they help distract you from anything stressful in school. It is also important to remember to keep up with the lectures after the midterm because you do not want to fall behind.
Sun Nov 22, 2020 3:58 pm
Forum: Student Social/Study Group
Topic: Step-Up vs. Drop-In Sessions
Replies: 7
Views: 63

### Re: Step-Up vs. Drop-In Sessions

In UA sessions, they review certain topics based on the week and give problems on them. They lightly review the topics, whereas in Step-Up sessions, they review the topics and problems with more emphasis on the steps and detail.
Sun Nov 15, 2020 5:30 pm
Forum: Lewis Structures
Topic: Lewis Acids and Bases (Sapling HW)
Replies: 1
Views: 34

### Lewis Acids and Bases (Sapling HW)

How can molecules with double polar bonds accept electrons? (Like SO2)
Sun Nov 15, 2020 4:28 pm
Forum: Lewis Structures
Topic: Lewis acids and Bases
Replies: 20
Views: 119

### Re: Lewis acids and Bases

One way to identify a lewis base is by drawing the lewis structure of it. If the compound is electron deficient, then it is a lewis base because it needs to accept electrons. A lewis base usually is an anion or has extra electrons, which can be donated to lewis bases.
Sun Nov 15, 2020 4:24 pm
Forum: Lewis Structures
Topic: Central Atom
Replies: 20
Views: 91

### Re: Central Atom

The central atom is the one that has the least electronegativity. Since the trend of electronegativity increases to the right and to the top (with fluorine having the most), you select the atom that is the farthest.
Sun Nov 15, 2020 4:20 pm
Forum: Lewis Structures
Topic: Chemical Names
Replies: 9
Views: 62

### Re: Chemical Names

I am pretty sure we will not be tested on that, similar to how we encountered problems on oxidation number. Just in case, I would double check with someone else.
Sun Nov 15, 2020 4:14 pm
Forum: Dipole Moments
Topic: London (dispersion) forces
Replies: 4
Views: 44

### Re: London (dispersion) forces

One thing to think about is that London dispersion forces are always present in all molecules. However, to find out whether its only London dispersion forces, I use the process of elimination. The first thing I check is to see if the molecule is an ion-dipole relationship. The next aspect is to chec...
Sun Nov 15, 2020 4:09 pm
Forum: Resonance Structures
Topic: Sapling #4
Replies: 6
Views: 58

### Re: Sapling #4

In order to draw different resonance structures, I exchange the electron formation and bonds while keeping the number of overall valence electrons the same. It is also important to calculate the formal charge while doing this.
Sun Nov 08, 2020 10:26 pm
Forum: Student Social/Study Group
Topic: Studying From Home
Replies: 91
Views: 485

### Re: Studying From Home

Personally for me, I study in an area that provides the least distractions. Staying in an environment that is less likely to influence you to distract yourself will actually help a lot. In addition, muting notifications on your phone or just putting in away from your presence will definitely keep yo...
Sun Nov 08, 2020 10:04 pm
Forum: Student Social/Study Group
Topic: chemistry community post
Replies: 3
Views: 36

### Re: chemistry community post

From my TA and some other people, I heard that posts will only be counted at the end of the quarter. Just to be sure, I clarify with someone else as well.
Sun Nov 08, 2020 10:02 pm
Forum: Student Social/Study Group
Topic: Mid-quarter Check in
Replies: 67
Views: 281

### Re: Mid-quarter Check in

Personally, I feel that the online format has pros and cons to learning. The biggest obstacle that I have faced is being distracted and trying to balance other classes along with my personal life. We all got this guys!
Sat Nov 07, 2020 2:16 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge of the Same Element
Replies: 15
Views: 60

### Re: Formal Charge of the Same Element

I believe that each atom should have its own formal charge because each atom on the compound can have different numbers of bonds and valence electrons.
Sat Nov 07, 2020 2:14 pm
Forum: Electronegativity
Topic: Electronegativity Table/Chart in Lecture
Replies: 14
Views: 53

### Re: Electronegativity Table/Chart in Lecture

I do not think it is required to memorize the specific values for electronegativity, but to memorize the trends of it on the periodic table and its relation to ionic/covalent character. I remember during the lecture he said that if we had to determine if a compound has ionic or covalent character, h...
Sun Nov 01, 2020 2:40 pm
Forum: Student Social/Study Group
Topic: How to relax
Replies: 113
Views: 596

### Re: How to relax

In order to destress and relax, I usually go exercise or play video games because it distracts me.
Sun Nov 01, 2020 2:38 pm
Forum: Quantum Numbers and The H-Atom
Topic: number of posts required
Replies: 4
Views: 22

### Re: number of posts required

We should have 20 posts by week 4 since it is 5 posts per week.
Sun Nov 01, 2020 11:54 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: l=4
Replies: 13
Views: 85

### Re: l=4

I believe that l=4 would be equivalent to higher orbitals, but in this class we are only dealing with 0,1,2,3.
Sun Nov 01, 2020 11:50 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Excited vs. Ground State
Replies: 3
Views: 46

### Re: Excited vs. Ground State

The concept of electrons being excited to a higher level relates to electron configuration because an electron that is excited means that there are added electrons. In an electron configuration, this would be represented by the valence electron being in the next orbital.
Sun Nov 01, 2020 11:36 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Ground state electron configuration?
Replies: 9
Views: 47

### Re: Ground state electron configuration?

The term "ground state" refers to the lowest energy state that an atom can have.
Sun Oct 25, 2020 8:18 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8520
Views: 1471942

### Re: Post All Chemistry Jokes Here

Did you hear that oxygen when on a date with potassium?

It went OK.
Sun Oct 25, 2020 8:12 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Replies: 92
Views: 2098

Personally, I study in short intervals of about an hour because taking breaks are important for retaining information. Everyday I review bits of my lecture notes so that the information stays in my head. In addition, I recommend attending every UA session even if think you are fine. Doing problems w...
Sun Oct 25, 2020 8:07 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: orbital concepts
Replies: 6
Views: 63

### Re: orbital concepts

Orbitals describe the location of where an electron can be found. As of right now, there are more orbitals after f, but we are not required to learn that.
Sun Oct 25, 2020 8:04 pm
Forum: General Science Questions
Topic: Webcams
Replies: 17
Views: 128

### Re: Webcams

For my discussion, I am just going to log into zoom on another device while the test is going on. Since I am taking the test on respondus on my computer, zoom will be closed, so you have to access zoom on an external device.
Sun Oct 25, 2020 8:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Even Solutions to Textbook Questions
Replies: 3
Views: 34

### Re: Even Solutions to Textbook Questions

I don't think you can view solutions to even problems, only odd.
Sun Oct 25, 2020 7:59 pm
Forum: Student Social/Study Group
Replies: 7
Views: 62

### Re: Advice for Midterm Studying?

One of the methods that I am using for studying is to review all the lecture notes, doing all the textbook problems, and going to all the UA sessions and doing their worksheets. UA sessions help a lot because you are able to interact with other students and they can answer questions live.
Thu Oct 15, 2020 8:17 pm
Forum: Photoelectric Effect
Topic: Definition of "Work"
Replies: 6
Views: 86

### Re: Definition of "Work"

Work is the amount of energy that it takes for an electron to be ejected. According to the photoelectric experiment, the energy of a photon must be greater or equal to the work function, which is also referred to as the energy needed to eject an electron. You will know when to apply the equation whe...
Thu Oct 15, 2020 7:24 pm
Forum: SI Units, Unit Conversions
Topic: Webcam
Replies: 11
Views: 126

### Re: Webcam

If you have Amazon prime, you can definitely get a webcam for a low price since there was "Amazon prime day."
Thu Oct 15, 2020 7:16 pm
Forum: Photoelectric Effect
Topic: finding Ek
Replies: 4
Views: 46

### Re: finding Ek

Another way you can find the energy of the photon besides (E=hv) is through the photoelectric formula which is E(photon) - E(ejected electron) = Kinetic energy of electron. If you were given the wavelength of an ejected electron, you would have to use c=( λ )(ν) and move the variables around to ν=c/...
Thu Oct 15, 2020 7:06 pm
Forum: Administrative Questions and Class Announcements
Topic: Historical Figures in Science
Replies: 5
Views: 48

### Re: Historical Figures in Science

I do not think it is necessary to memorize historical figures, but I feel that we should memorize the important names that are tied to constants, equations, experiments, laws, etc. It would be beneficial to remember some so that it will help you remember concepts.
Wed Oct 14, 2020 10:15 am
Forum: Empirical & Molecular Formulas
Topic: Dealing with Diatomic Elements
Replies: 11
Views: 116

### Dealing with Diatomic Elements

For one of my problems in discussion, we were tasked to find the molecular formula of caffeine, which included the elements CO2, H2O, and nitrogen. I know that nitrogen exists as a diatomic element, so it is written as N2. But when I am finding the moles of nitrogen, do I treat it as N2 or N? All re...
Wed Oct 14, 2020 10:06 am
Forum: Properties of Light
Topic: Photons
Replies: 9
Views: 81

### Re: Photons

In quantum mechanics, a photon is a particle of light that harbors energy. Unlike classical mechanics, light is treated as a wave, but in this case, a photon is a particle.
Wed Oct 07, 2020 3:14 pm
Forum: Limiting Reactant Calculations
Topic: Help Determining a Chemical Equation
Replies: 5
Views: 53

### Re: Help Determining a Chemical Equation

My apologies, I meant to state that chlorine had a -1 charge, so it takes 3 chlorine atoms to cancel one aluminum atom.
Wed Oct 07, 2020 2:08 pm
Forum: Limiting Reactant Calculations
Topic: Help Determining a Chemical Equation
Replies: 5
Views: 53

### Re: Help Determining a Chemical Equation

Determining the molecular formulas of those three components is apart of the process of balancing a chemical equation. By looking at the periodic table, you can determine the ionic charge of aluminum and chlorine to help construct the formula for aluminum chloride. Since aluminum has a +3 charge and...
Wed Oct 07, 2020 2:00 pm
Forum: Properties of Light
Topic: Units of Work Function
Replies: 3
Views: 50

### Re: Units of Work Function

I believe that the work function can be expressed in both Joules and Joules/mol. According to the SI base unit, it can also be expressed as J/mol^-1.
Wed Oct 07, 2020 10:03 am
Forum: Administrative Questions and Class Announcements
Topic: Sapling Homework Submission Confirmation [ENDORSED]
Replies: 2
Views: 51

### Re: Sapling Homework Submission Confirmation[ENDORSED]

Once you finish the Sapling homework, it is already inputted into your sapling grade. You can confirm this by checking your Sapling grade to see if there is a score for Homework 1.
Wed Oct 07, 2020 10:00 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molecules, and Formula Units
Replies: 4
Views: 95

### Re: Molecules, and Formula Units

To clarify, a formula unit is the amount of units used when converting an empirical formula to a molecular formula. Thus, it represents the lowest whole number ratio in an ionic compound. On the other hand, a molecule is created when 2 or more elements are bonded together covalently.
Wed Oct 07, 2020 9:53 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Review of Chemical and Physical Principles Fundamentals E.15
Replies: 7
Views: 44

### Re: Review of Chemical and Physical Principles Fundamentals E.15

In this question the metal "M" is supposed to be calcium. Find the molar mass of (OH)2, then you can subtract the molar mass of hydroxide from the overall molar mass to get the molar mass of calcium, which should give you 40.08 grams/mol. This matches the mass of calcium in the periodic ta...