Search found 65 matches

by ShinwooKim_3E
Mon Jan 25, 2021 2:46 am
Forum: Administrative Questions and Class Announcements
Topic: Grading scale
Replies: 11
Views: 115

Re: Grading scale

Probably 93 is an A and anything below that and above 90 will be an A-
by ShinwooKim_3E
Mon Jan 25, 2021 2:45 am
Forum: Student Social/Study Group
Topic: 14B Groupme
Replies: 12
Views: 88

Re: 14B Groupme

I think the Chem 14A changed to the 14B Groupme, someone posted it on the announcements in CCLE I believe.
by ShinwooKim_3E
Mon Jan 25, 2021 2:45 am
Forum: Student Social/Study Group
Topic: Study Guide - Midterm?
Replies: 14
Views: 54

Re: Study Guide - Midterm?

I don't have a particular study guide, but I find the most help on going over the textbook problems recommended as well as reviewing hard problems from Sapling!
by ShinwooKim_3E
Mon Jan 25, 2021 2:44 am
Forum: Student Social/Study Group
Topic: How are you?
Replies: 117
Views: 788

Re: How are you?

I can't believe midterms are in 4 days...
by ShinwooKim_3E
Mon Jan 25, 2021 2:43 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8547
Views: 1474774

Re: Post All Chemistry Jokes Here

What did one ion say to the other?
I've got my ion you.
by ShinwooKim_3E
Sat Jan 16, 2021 1:32 pm
Forum: Ideal Gases
Topic: T variable in pv=nrt [ENDORSED]
Replies: 38
Views: 285

Re: T variable in pv=nrt [ENDORSED]

Always keep the units in Kelvin so you don't accidently miscalculate.
by ShinwooKim_3E
Sat Jan 16, 2021 1:32 pm
Forum: Ideal Gases
Topic: Units of Temperature
Replies: 82
Views: 288

Re: Units of Temperature

The units would be in Kelvin.
by ShinwooKim_3E
Sat Jan 16, 2021 1:31 pm
Forum: Ideal Gases
Topic: reversing reactions
Replies: 83
Views: 402

Re: reversing reactions

K becomes the inverse, 1/K.
by ShinwooKim_3E
Sat Jan 16, 2021 1:30 pm
Forum: Ideal Gases
Topic: PV=nRT
Replies: 74
Views: 451

Re: PV=nRT

P=pressure
V=volume
n=moles
R=gas constant
T=temperature
by ShinwooKim_3E
Wed Jan 06, 2021 11:44 pm
Forum: Administrative Questions and Class Announcements
Topic: How to find my posts
Replies: 93
Views: 49682

Re: How to find my posts

I tap on the profile on the top right, click on user control panel, go to overview, then access my posts on "Show my posts" on the very bottom of the page.
by ShinwooKim_3E
Wed Jan 06, 2021 11:41 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 182
Views: 106822

Re: Reading the textbook [ENDORSED]

I like to first watch the lectures and take notes, then rewatch the lectures to compare them to the corresponding textbook section and finish by doing the problems suggested in the syllabus.
by ShinwooKim_3E
Wed Jan 06, 2021 11:40 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8547
Views: 1474774

Re: Post All Chemistry Jokes Here

A photon checks into a hotel and is asked if he needs any help with his luggage. He says, "No, I'm traveling light."
by ShinwooKim_3E
Wed Jan 06, 2021 11:38 pm
Forum: Administrative Questions and Class Announcements
Topic: Registering/Creating Your Chemistry Community Account
Replies: 32
Views: 44980

Re: Registering/Creating Your Chemistry Community Account

Don't forget to change your discussion number if you already took the class last quarter!
by ShinwooKim_3E
Wed Jan 06, 2021 11:34 pm
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 106
Views: 7187

Re: Accessing the E-textbook [ENDORSED]

I already had access to the E-book because I took Chem14A last quarter, but it made me re-purchase an already bought version for this quarter (it doesn't charge).
by ShinwooKim_3E
Mon Dec 07, 2020 6:06 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 226
Views: 36005

Re: Final Jitters

Get a good night's rest the day before! For the longest time I personally would ignore this, but it helps you focus and ease your anxiety during tests!
by ShinwooKim_3E
Mon Dec 07, 2020 6:05 pm
Forum: SI Units, Unit Conversions
Topic: unit conversions
Replies: 24
Views: 254

Re: unit conversions

I usually leave it as 10^x.
by ShinwooKim_3E
Mon Dec 07, 2020 6:04 pm
Forum: SI Units, Unit Conversions
Topic: How to memorize prefixes
Replies: 22
Views: 215

Re: How to memorize prefixes

I memorized it in high school through flash cards/quizlet, if that helps!
by ShinwooKim_3E
Mon Dec 07, 2020 6:02 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 337
Views: 139728

Re: Saying Thank You to Dr. Lavelle

Dr. Lavelle- I would like to say a heartfelt thank you for your passion in teaching us chemistry! Despite the classes being online and off-campus, you helped us learn in a supportive learning environment with great help and support. We students would like you to know that we appreciate you immensely...
by ShinwooKim_3E
Mon Dec 07, 2020 5:54 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8547
Views: 1474774

Re: Post All Chemistry Jokes Here

Want to hear a joke about nitrogen oxide? NO!
by ShinwooKim_3E
Sun Dec 06, 2020 5:24 pm
Forum: Hybridization
Topic: pi bonds
Replies: 6
Views: 90

Re: pi bonds

Pi bonds are only seen in double or triple bonds.
by ShinwooKim_3E
Sun Dec 06, 2020 5:23 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Memorization for final
Replies: 9
Views: 73

Re: Memorization for final

I think for memorization, the key compounds and their changes, and VSEPR models would be required!
by ShinwooKim_3E
Sun Dec 06, 2020 5:13 pm
Forum: Administrative Questions and Class Announcements
Topic: CCLE fixed?
Replies: 19
Views: 100

Re: CCLE fixed?

Mine is really laggy right now, so I'm just waiting until it becomes normal again.
by ShinwooKim_3E
Sun Dec 06, 2020 5:12 pm
Forum: Administrative Questions and Class Announcements
Topic: 14B Enrollment [ENDORSED]
Replies: 26
Views: 1353

Re: 14B Enrollment [ENDORSED]

Edwin Liang 2I wrote:I think the lectures are recorded again because it saids "Online - Recorded"

I think it's going to be the same as 14A, just watching it in your own free time.
by ShinwooKim_3E
Sun Dec 06, 2020 5:11 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8547
Views: 1474774

Re: Post All Chemistry Jokes Here

What happens when you lower your body temperature to -273°C? Nothing, you're perfectly 0K!
by ShinwooKim_3E
Fri Nov 27, 2020 1:51 pm
Forum: Trends in The Periodic Table
Topic: atomic radius of anions
Replies: 9
Views: 70

Re: atomic radius of anions

The general trend of the atomic radius is that it decreases as you go across a period (left to right), and increases from above to below in a group.
by ShinwooKim_3E
Fri Nov 27, 2020 1:49 pm
Forum: Empirical & Molecular Formulas
Topic: Periodic Table and Calculations
Replies: 20
Views: 161

Re: Periodic Table and Calculations

I think the most calculator everyone uses is the TI-84.
by ShinwooKim_3E
Fri Nov 27, 2020 1:46 pm
Forum: SI Units, Unit Conversions
Topic: Modules This Week
Replies: 9
Views: 113

Re: Modules This Week

I hope he would post more! They helped me a lot during the initial weeks.
by ShinwooKim_3E
Fri Nov 27, 2020 1:45 pm
Forum: Significant Figures
Topic: 40. versus 40
Replies: 23
Views: 181

Re: 40. versus 40

Except when the 0s in decimals are considered, whole values with 0s are not accounted for as a signifcant figure.
by ShinwooKim_3E
Fri Nov 27, 2020 1:43 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molarity other than solutions
Replies: 6
Views: 55

Re: Molarity other than solutions

Molarity is a way to find the concentration of an aqueous solution, and can't be used to find out the concentrations in gases and solids.
by ShinwooKim_3E
Sat Nov 21, 2020 6:57 pm
Forum: Quantum Numbers and The H-Atom
Topic: London Dispersion Forces
Replies: 7
Views: 65

Re: London Dispersion Forces

The weakest intermolecular forces that form very weak, temporary dipoles.
by ShinwooKim_3E
Sat Nov 21, 2020 6:56 pm
Forum: Quantum Numbers and The H-Atom
Topic: quantum number f
Replies: 6
Views: 72

Re: quantum number f

I don't think you have to worry about it too much, because the I think we only need to know the general quantum numbers up to the d subshells.
by ShinwooKim_3E
Sat Nov 21, 2020 6:55 pm
Forum: Quantum Numbers and The H-Atom
Topic: Names of different orbitals
Replies: 7
Views: 83

Re: Names of different orbitals

I don't think we have to know the names and shapes past the d orbitals.
by ShinwooKim_3E
Sat Nov 21, 2020 6:54 pm
Forum: Quantum Numbers and The H-Atom
Topic: Textbook question 1E.9
Replies: 4
Views: 48

Re: Textbook question 1E.9

The main exceptions I look for is that s never equals 0 and l cannot be more than 4!
by ShinwooKim_3E
Sat Nov 21, 2020 6:52 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 226
Views: 36005

Re: Final Jitters

I have anxiety also waiting for test results :')
by ShinwooKim_3E
Fri Nov 13, 2020 11:59 pm
Forum: SI Units, Unit Conversions
Topic: picometer conversion
Replies: 13
Views: 137

Re: picometer conversion

1 picometer is synonymous to 1 * 10^-12 meters.
by ShinwooKim_3E
Fri Nov 13, 2020 11:58 pm
Forum: SI Units, Unit Conversions
Topic: Memorizing SI Units
Replies: 14
Views: 110

Re: Memorizing SI Units

Are we expected to memorize SI units? I have some of them memorized, but could not remember what power of 10 a picometer was on the exam. I didn't see SI units given on the exam or on the formulas sheet, so I am guessing we should memorize them? Does anyone have any tricks they use to memorize them...
by ShinwooKim_3E
Fri Nov 13, 2020 11:57 pm
Forum: SI Units, Unit Conversions
Topic: conversion factors
Replies: 8
Views: 62

Re: conversion factors

Hana Sigsbee 3A wrote:are there any specific conversion factors we are expected to know for the midterm that are not basic common knowledge ones?

Other than unit conversions (micro nano pico etc), all the conversions will be on the resource sheet provided for us!
by ShinwooKim_3E
Fri Nov 13, 2020 11:55 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 203
Views: 1298

Re: How are you studying?

Hi, I am having trouble being on top of my work so I was hoping so of you guys could kinda walk me through how you stay on top of Chem. Also do you have any tips on how to study for the midterm coming up? I usually review all the textbook problems Professor Lavelle recommends, and review the saplin...
by ShinwooKim_3E
Wed Nov 04, 2020 12:51 am
Forum: SI Units, Unit Conversions
Topic: Angstrom
Replies: 6
Views: 66

Re: Angstrom

I'm a little confused on converting units still. I know 1 Angstrom is 10^-10m. But if I have 6.001x10^-7 and I multiply that by 10^-10 on my calculator, I get 6.001x10^-17 when the answer should be 6001 angstroms I think. Any ideas? SInce -7 and -10 have a difference of 3 decimal places, the answer...
by ShinwooKim_3E
Wed Nov 04, 2020 12:45 am
Forum: SI Units, Unit Conversions
Topic: SI Unit for Mass
Replies: 10
Views: 103

Re: SI Unit for Mass

Out of all the equations we've used so far in units 1 and 2, should mass always be in kg? I've been using g for mass for most of my work, but I noticed while reviewing the De Broglie equation that mass needs to be converted into kg for this example. Do some equations require mass in kg while some u...
by ShinwooKim_3E
Wed Nov 04, 2020 12:43 am
Forum: SI Units, Unit Conversions
Topic: Converting equations
Replies: 14
Views: 124

Re: Converting equations

Hi, While I was working on the homework a lot of my problems originated from wrongly converting equations. This occurred with equations as simple as E = hc/lambda Any tips? I like highlighting or putting different shapes on a specific part of the equation I'm working on, and put a check mark so I k...
by ShinwooKim_3E
Wed Nov 04, 2020 12:42 am
Forum: SI Units, Unit Conversions
Topic: Using a Calculator
Replies: 10
Views: 86

Re: Using a Calculator

Not sure if anyone's run into this problem but I'd thought I would share because it continuely happens to me. By using parantheses on everything you insert into your calculator, it really prevents errors. Especially in terms of determining if an exponenet should be negative or positive I remember g...
by ShinwooKim_3E
Wed Nov 04, 2020 12:41 am
Forum: SI Units, Unit Conversions
Topic: unit conversions
Replies: 24
Views: 254

Re: unit conversions

Agustina Santa Cruz 2F wrote:When converting units do you just multiply by 10^x given number or is there a different way? For example if I convert centi to giga, I multiply the number I'm converting by 10^9 and leave it in scientific notation?

I usually leave the answer as x 10^x!
by ShinwooKim_3E
Fri Oct 30, 2020 10:42 pm
Forum: Molarity, Solutions, Dilutions
Topic: UA Session Question
Replies: 2
Views: 40

Re: UA Session Question

Hi! Could someone teach me how to do part b of this question? Arsenic is a toxic substance that can sometimes be found in groundwater. Arsenic has a molar mass of 74.922 g/mol. a) Calculate the molarity if 1.125 grams of arsenic are added to 235 mL of water. b) What volume (mL) of concentrated arse...
by ShinwooKim_3E
Fri Oct 30, 2020 10:41 pm
Forum: Empirical & Molecular Formulas
Topic: Review for Midterm
Replies: 11
Views: 153

Re: Review for Midterm

I just had a quick question that came up when I was reviewing for the midterm. I was going over the fundamentals and I was wondering if we would have to know the formula for a molecule just based on the name. For example, for F3, it says to write the formula for nitric acid. Do we need to know this...
by ShinwooKim_3E
Fri Oct 30, 2020 10:39 pm
Forum: Limiting Reactant Calculations
Topic: Midterm
Replies: 7
Views: 108

Re: Midterm

On the midterm will the questions be like those in the textbook where it will ask for the balanced chemical equation when aluminum metal reacts with chlorine gas to produce aluminum chloride? Will we be expected to know that Chlorine gas is Cl2 or know what aluminum chloride looks like? Or will we ...
by ShinwooKim_3E
Fri Oct 30, 2020 10:37 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 226
Views: 36005

Re: Final Jitters

Does anyone know how to calm down your anxieties before you take this final? Since having test anxiety can be very distracting while you're trying to study or even while you're taking the test itself. Open to any tips:) If I can go back, I would definitely not sleep for two hours, because by the en...
by ShinwooKim_3E
Fri Oct 30, 2020 10:36 pm
Forum: Administrative Questions and Class Announcements
Topic: Fall 2020 Midterm 1 Instructions
Replies: 20
Views: 1084

Re: Fall 2020 Midterm 1 Instructions

Do you know when midterm grades will be submitted?
by ShinwooKim_3E
Thu Oct 22, 2020 5:25 pm
Forum: SI Units, Unit Conversions
Topic: SI units
Replies: 9
Views: 46

Re: SI units

You have to use meters for this equation!
by ShinwooKim_3E
Thu Oct 22, 2020 5:24 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?

If you look at the syllabus, there are multiple practice problems Professor Lavelle recommended, so I think doing all of those will prepare you more than enough for the midterm!
by ShinwooKim_3E
Thu Oct 22, 2020 5:23 pm
Forum: SI Units, Unit Conversions
Topic: Conversions
Replies: 5
Views: 58

Re: Conversions

we'll be given a conversion sheet for the midterm, I think!
by ShinwooKim_3E
Thu Oct 22, 2020 5:22 pm
Forum: SI Units, Unit Conversions
Topic: units to know for midterm
Replies: 11
Views: 149

Re: units to know for midterm

I would remember them just in case (I also remember memorizing them as a mandatory assignment for my past high school)!
by ShinwooKim_3E
Thu Oct 22, 2020 5:21 pm
Forum: SI Units, Unit Conversions
Topic: Kilograms SI unit?
Replies: 4
Views: 35

Re: Kilograms SI unit?

kilograms is the si unit, yes! Remember to convert all measurements in the problem to kg!
by ShinwooKim_3E
Wed Oct 14, 2020 5:21 pm
Forum: Significant Figures
Topic: Sig Fig Process
Replies: 13
Views: 111

Re: Sig Fig Process

It's always a good idea to hold off on sig figs until the very end!
by ShinwooKim_3E
Wed Oct 14, 2020 5:19 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular formula from shape
Replies: 5
Views: 86

Re: Molecular formula from shape

You can't figure out how many double bonds a structure has just by looking at its chemical formula (that's why we draw models)!
by ShinwooKim_3E
Wed Oct 14, 2020 5:06 pm
Forum: Ionic & Covalent Bonds
Topic: Is ionic or covalent stronger?
Replies: 31
Views: 397

Re: Is ionic or covalent stronger?

I think generally covalent bonds are stronger. Take salt and water for example, NaCl, an ionic compound, dissolves in H2O, a covalent compound. You can infer that the ionic bonds in NaCl were weak enough to break in an aqueous solution.
by ShinwooKim_3E
Wed Oct 14, 2020 5:00 pm
Forum: Properties of Light
Topic: GroupMe
Replies: 2
Views: 54

Re: GroupMe

I don't think there's a GroupMe, but here's a link to the Discord if you haven't joined yet:
https://discord.gg/TCUm7A
by ShinwooKim_3E
Wed Oct 14, 2020 4:59 pm
Forum: SI Units, Unit Conversions
Topic: Textbook
Replies: 22
Views: 181

Re: Textbook

The textbook is only for self-studying and learning the problem sets, I think! The actual homework is on sapling learning.
by ShinwooKim_3E
Wed Oct 07, 2020 4:46 pm
Forum: Balancing Chemical Reactions
Topic: Fractions
Replies: 34
Views: 566

Re: Fractions

I know this was kind of addressed in a question someone asked earlier but I just wanted to ask if we would be marked down if we left the stoichiometric coefficient as a fraction? I know different professors prefer different things so I just wanted to clarify to see if it would necessarily be seen a...
by ShinwooKim_3E
Wed Oct 07, 2020 4:44 pm
Forum: Balancing Chemical Reactions
Topic: Periodic Table
Replies: 50
Views: 484

Re: Periodic Table

Ke Huang 2G wrote:Do we need to memorize both the name and the symbol of elements for the Periodic Table? Will the Periodic Table on the tests provide us the names?

Not all the elements, but only the important top few rows I think!
by ShinwooKim_3E
Wed Oct 07, 2020 4:43 pm
Forum: Balancing Chemical Reactions
Topic: State in chemical reactions
Replies: 13
Views: 117

Re: State in chemical reactions

Will we be penalized for not including the state of each element in the chemical reactions? It's easier for me to visualize the formula without the extra information but I don't know if that's something that's important to have in the answer. In my high school class, I would always get docked off 0...
by ShinwooKim_3E
Wed Oct 07, 2020 4:40 pm
Forum: Balancing Chemical Reactions
Topic: Stoichiometric Coefficients
Replies: 20
Views: 147

Re: Stoichiometric Coefficients

Can we assume that a problem with the stoichiometric coefficients already given in the chemical equation is balanced? In other words, would there ever be a scenario where the stoichiometric coefficients are given, but the equation isn't balanced? Yes! Some given equations can be tricky because they...
by ShinwooKim_3E
Wed Oct 07, 2020 4:38 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Equations --> #18 in Module
Replies: 4
Views: 76

Re: Balancing Equations --> #18 in Module

If a hydrocarbon is being combusted, the chemical equation with be the hydrocarbon + O2 forms CO2 + H2O. Butane is a hydrocarbon so this equation will apply and all you have to do is balance it. If there is also nitrogen or another element in the molecule being combusted, other products may form. Y...

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