Search found 75 matches

by Edward Suarez 1I
Sun Mar 17, 2019 3:33 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

u know what's a joke?

my grade on that final :(
by Edward Suarez 1I
Sat Mar 16, 2019 3:45 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.15d
Replies: 1
Views: 23

Re: 14.15d

also in general, is the E of a reaction the same for the reverse reaction? or is it negative E

(im probably gonna use this thread to ask questions for myself, pls answer if u need some pts for chem commnunity + ya boi needs help lmao
by Edward Suarez 1I
Sat Mar 16, 2019 3:08 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.15d
Replies: 1
Views: 23

14.15d

hi so for 14.5d, the answer key says that the cell is Cd(s)|Cd(OH)2(s)|KOH(aq) || Ni(OH)3(s) | Ni(OH)2(s) | Ni (s) i understand how to get the half reactions but i don't understand where KOH came from (i would understand it if it were OH but not KOH). also for the second half of it, how come there i...
by Edward Suarez 1I
Sat Mar 16, 2019 2:36 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.3c, 6th edition
Replies: 1
Views: 26

14.3c, 6th edition

the question is: write half reactions, balanced equations, and cell diagram of Cl2 + H2 --> HCl how do you find the balance equations (liek i thought it would be Cl2 + 2H+ --> 2HCl but the products for anode and cathode respectively were H+ and Cl, why is it like this? Also how do u know when you ne...
by Edward Suarez 1I
Tue Mar 12, 2019 11:37 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: molecularity
Replies: 2
Views: 33

molecularity

if for the reactants it said 2O3, would that be unimolecular or bi?
by Edward Suarez 1I
Mon Mar 11, 2019 2:49 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

if avogadro calls tell him to leave his number
by Edward Suarez 1I
Mon Mar 11, 2019 2:46 am
Forum: Student Social/Study Group
Topic: Note Taking
Replies: 32
Views: 1318

Re: Note Taking

handwritten, mostly writing whats on the slides + adding on with my own notes on the side based on what he says that isn't on the slide
by Edward Suarez 1I
Mon Mar 11, 2019 2:44 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

two chemists walk into a bar
one says i'll have an h2o
the other says i'll have an h2o too

the second chemist dies...
by Edward Suarez 1I
Sun Mar 03, 2019 4:20 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

take all ur lame chem jokes and barium
by Edward Suarez 1I
Sun Mar 03, 2019 4:08 pm
Forum: Balancing Redox Reactions
Topic: Acidic vs basic solutions
Replies: 10
Views: 109

Re: Acidic vs basic solutions

for basic solutions, you use OH- and for acidic solutions you use H+ for balancing purposes
by Edward Suarez 1I
Sun Feb 24, 2019 11:10 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

Q: What is the chemical formula for "coffee"?
A: CoFe2
by Edward Suarez 1I
Sun Feb 24, 2019 11:10 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

How about the chemical workers… are they unionized?
by Edward Suarez 1I
Sun Feb 24, 2019 11:10 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

H2O is water and H2O2 is hydrogen peroxide. What is H2O4?
Drinking.
by Edward Suarez 1I
Sat Feb 16, 2019 10:50 pm
Forum: Phase Changes & Related Calculations
Topic: Heat Release from ice (0C) to water (20C)
Replies: 4
Views: 2001

Re: Heat Release from ice (0C) to water (20C)

The one that starts with 6 is 6.01 kJ*mol^-1. This is per mole and the one Lavelle used is per gram and isn't given to us on the constant sheet. The two options here are to remember and use that one for this problem or convert the grams of ice to moles and use the 6.01kJ/mol (If you convert to mole...
by Edward Suarez 1I
Sat Feb 16, 2019 10:49 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

if a king farts, is it a noble gas?
by Edward Suarez 1I
Sat Feb 16, 2019 10:49 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

what do you call iron blowing in the wind?

FeBreeze!
by Edward Suarez 1I
Mon Feb 11, 2019 12:57 am
Forum: Phase Changes & Related Calculations
Topic: Heat Release from ice (0C) to water (20C)
Replies: 4
Views: 2001

Re: Heat Release from ice (0C) to water (20C)

The question requires two equations: Q_{fusion} = mC_{fusion} to turn the ice into water. And Q = mCΔT for heating the water from 0^{o}C to 20^{o}C . The specific heat for water is used because the temperature is not below 0^{o}C . The specific hear for ice is only used till 0^{o}C then in order to...
by Edward Suarez 1I
Mon Feb 11, 2019 12:05 am
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Ch 8 #31 (8.31)
Replies: 3
Views: 535

Re: Ch 8 #31 (8.31)

The formula to calculate the heat released is q = m*C*change in temperature. To calculate the heat capacity, C, for a constant pressure, the formula is 5/2R, which gives a value of 20.8 (J/mol)/(degree C). m is for the mass of the substance so you have to get the mass in grams. To do so, you do 5.0...
by Edward Suarez 1I
Sun Feb 10, 2019 10:27 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

the name's bond, ionic bond.
by Edward Suarez 1I
Sun Feb 10, 2019 10:25 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

how often do i tell chemistry jokes?

periodically

jk weekly
by Edward Suarez 1I
Sun Feb 10, 2019 10:25 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

i try to post chemistry jokes but theres no reaction
by Edward Suarez 1I
Mon Feb 04, 2019 5:39 pm
Forum: Phase Changes & Related Calculations
Topic: Homework Problem 8.21
Replies: 6
Views: 1704

Re: Homework Problem 8.21

I think the equation goes (Tf-Ti) so for the Copper side it should be (T-100), because both the water and Copper should have the same final temperature at equilibrium. This will yield the 24.8 degrees C. i thought the same but every time i worked it out i always got 19. something... am i doing the ...
by Edward Suarez 1I
Sun Feb 03, 2019 3:13 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

y'all should zinc of new chemistry jokes
by Edward Suarez 1I
Sun Feb 03, 2019 3:11 pm
Forum: Phase Changes & Related Calculations
Topic: Steam resulting in burns?
Replies: 6
Views: 75

Re: Steam resulting in burns?

when steam makes contact . w/ skin, it undergoes phase transition into liquid . which releases the amount of energy (~41 kJ) for the phase transition into ur skin as heat or something like that
by Edward Suarez 1I
Sun Feb 03, 2019 3:10 pm
Forum: Ideal Gases
Topic: atm vs. bar?
Replies: 23
Views: 347

Re: atm vs. bar?

i had the same question but I realized that most of the problems that had bar in the question had the answer in bar too
by Edward Suarez 1I
Sun Jan 27, 2019 9:41 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

NaCl
NaOH

the base is under a salt.
by Edward Suarez 1I
Sun Jan 27, 2019 9:40 pm
Forum: Phase Changes & Related Calculations
Topic: Week 4 Homework
Replies: 12
Views: 164

Re: Week 4 Homework

anything taught between the last time you turned in homework and when the homework is due should suffice.
by Edward Suarez 1I
Sun Jan 27, 2019 9:39 pm
Forum: Phase Changes & Related Calculations
Topic: Phase Changes
Replies: 7
Views: 89

Re: Phase Changes

both require the input of heat to transition into that state (heat needed to make a block of ice into water, and heat needed to make water into vapor)

think irl when u actually you leave ice out and it melts because of heat, or when you boil water
by Edward Suarez 1I
Sun Jan 20, 2019 2:36 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: When x is small
Replies: 4
Views: 55

Re: When x is small

Harshita Talkad 4L wrote:x needs to be smaller than 10^(-3) to be ignored. This means it's small enough to be insignificant, which connects to the approximation being valid if it's within 5% because it means the x was small enough.


thank you!

follow up question: what happens if the approximation is not within 5%?
by Edward Suarez 1I
Sun Jan 20, 2019 2:20 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

what is a cation afraid of?
a dogion
by Edward Suarez 1I
Sun Jan 20, 2019 2:20 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

did u hear about the chemist who was reading a book about helium? He just couldn't put it down.
by Edward Suarez 1I
Sun Jan 20, 2019 2:19 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: When x is small
Replies: 4
Views: 55

When x is small

How small would x have to be to be ignored? (more so talking about when we "ignore x" when it is subtracted from a value when finding Kc for example) and how does this relate to the 5% initial to be a valid approximation?
by Edward Suarez 1I
Sun Jan 13, 2019 4:49 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: solids in calculating equilibrium constant? [ENDORSED]
Replies: 8
Views: 111

Re: solids in calculating equilibrium constant? [ENDORSED]

only aq and g solutions are included in the equation (and g is in partial pressure)
by Edward Suarez 1I
Sun Jan 13, 2019 4:49 pm
Forum: Ideal Gases
Topic: gases
Replies: 3
Views: 32

Re: gases

it depends on the question i think. some questions ask for the concentration of a certain gas in equilibrium, and because gas in equilibrium is given in partial pressure, we need to convert it to concentration.
by Edward Suarez 1I
Fri Jan 11, 2019 10:49 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Converting Kc to Kp
Replies: 4
Views: 97

Re: Converting Kc to Kp

PV = nRT
n/v is concentration, so P = concentration * RT

R is a constant while T is typically given, so typically u can just isolate P or concentration and plug it in to a calculator to find P or concentration from a given concentration or P (respectively)
by Edward Suarez 1I
Fri Jan 11, 2019 10:46 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K, Kc and Kp
Replies: 8
Views: 92

Re: K, Kc and Kp

i believe you can use them interchangeably (most people use K only). C refers to concentration while P refers to partial pressure
by Edward Suarez 1I
Sun Dec 09, 2018 8:35 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

Jackie Ngo 1C wrote:"you must be made of copper and tellurium! because you're so CuTe" ;)

im laughing ur jokes are so funny!!
by Edward Suarez 1I
Sun Dec 09, 2018 3:12 am
Forum: Naming
Topic: naming
Replies: 5
Views: 103

Re: naming

ah i see; i suppose i will just memorize them. thank you!
by Edward Suarez 1I
Sun Dec 09, 2018 3:11 am
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: strength of base
Replies: 4
Views: 99

Re: strength of base

thanks for your responses!
by Edward Suarez 1I
Sat Dec 08, 2018 2:53 pm
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: strength of base
Replies: 4
Views: 99

strength of base

what guildelines do we follow to determine the relative strength of bases? I know for acids, it would be amount of oxygen, strength of bond (weaker bond --> stronger acid), etc. but what about bases?
by Edward Suarez 1I
Fri Dec 07, 2018 9:07 pm
Forum: Naming
Topic: naming
Replies: 5
Views: 103

naming

how do we find oxidation number? is it something we have to memorize? (like how do. you know the oxidation number of CN is -1?)
by Edward Suarez 1I
Wed Dec 05, 2018 3:40 am
Forum: Empirical & Molecular Formulas
Topic: midterm question
Replies: 3
Views: 88

midterm question

so Q2 from the midterm stated that "A chemist wanting to determine the molecular formula of gallic acid burned 1.000 g of the compound in an elemental analyzer. The products of the combustion were 1.811 g of CO2 and 0.3172 g of H2O. " how can the products be more than the weight of the rea...
by Edward Suarez 1I
Sun Dec 02, 2018 2:44 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

take all ur lame chem jokes and... barium!!
by Edward Suarez 1I
Thu Nov 29, 2018 9:59 pm
Forum: Hybridization
Topic: hybridization of BrF3
Replies: 1
Views: 45

Re: hybridization of BrF3

nvm i read the answer key wrong haha whoops
by Edward Suarez 1I
Thu Nov 29, 2018 9:57 pm
Forum: Hybridization
Topic: hybridization of BrF3
Replies: 1
Views: 45

hybridization of BrF3

hi what is its hybridization in terms of s p and d?

The answer key (4.33.c) is saying sp3, but wouldn't it be sp3d because of the 3 flourines + two lone pairs. someone help!
by Edward Suarez 1I
Wed Nov 28, 2018 1:50 am
Forum: Lewis Structures
Topic: lewis structure
Replies: 2
Views: 59

lewis structure

why isn't the lewis structure of ClCN C single bonded with N on one side and Cl on the other?
by Edward Suarez 1I
Mon Nov 26, 2018 7:06 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 3
Replies: 10
Views: 204

Re: Test 3

Jayde Felix 4H wrote:For the sixth edition, the second half of Chapter 3, 6.4-6.5 and 4.1-4.7.



ooh got it, thank you!!
by Edward Suarez 1I
Mon Nov 26, 2018 5:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 3
Replies: 10
Views: 204

Re: Test 3

what chapter/sections should we read / study if we are using the 6th edition?
by Edward Suarez 1I
Sun Nov 25, 2018 8:40 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

a chem roast:

you a 10? maybe on a pH scale, cuz you're basic.
by Edward Suarez 1I
Sun Nov 25, 2018 8:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam
Replies: 22
Views: 427

Re: Final Exam

from friends who have taken the same class, i believe its cumulative!
by Edward Suarez 1I
Sun Nov 25, 2018 8:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Homework for week 9
Replies: 11
Views: 189

Re: Homework for week 9

a single paper should suffice!
by Edward Suarez 1I
Sun Nov 18, 2018 8:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Thanksgiving week
Replies: 10
Views: 252

Re: Thanksgiving week

Estelle Jung wrote:Are we able to turn in our homework for Week 8 when we come back from break (Week 9)?


yes if your discussion is during the days off. you'll just have to turn in 14 questions instead of 7 for week 9!
by Edward Suarez 1I
Sun Nov 18, 2018 8:30 pm
Forum: General Science Questions
Topic: Thanksgiving Week
Replies: 8
Views: 252

Re: Thanksgiving Week

i believe that prof. lavelle is trying to finish more in the last few class lectures so we could have class off, but we'll see.
by Edward Suarez 1I
Sun Nov 18, 2018 8:28 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

dont trust atoms, they make up everything.
by Edward Suarez 1I
Sun Nov 11, 2018 9:35 pm
Forum: Administrative Questions and Class Announcements
Topic: Class Grading
Replies: 9
Views: 310

Re: Class Grading

don't think so but i think he has the right to change the curve at the end of the semester
by Edward Suarez 1I
Sun Nov 11, 2018 9:33 pm
Forum: General Science Questions
Topic: Chemistry Community Posts
Replies: 8
Views: 322

Re: Chemistry Community Posts

i thought it was based on how each TA grades but i'm probably wrong.
by Edward Suarez 1I
Sat Nov 10, 2018 6:38 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm [ENDORSED]
Replies: 14
Views: 397

Re: Midterm [ENDORSED]

Chem_Mod wrote:Given that Monday is a holiday they will be handed back in class next week Wednesday.


will the midterm scores be posted online on myucla/ccle before the physical tests are passed out?
by Edward Suarez 1I
Sun Nov 04, 2018 11:04 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm Material
Replies: 1
Views: 82

Midterm Material

Up to what chapter/section of the 6th edition of the textbook should we study? Just want to make sure all the material I'm studying is relevant to the midterm.
by Edward Suarez 1I
Sun Nov 04, 2018 9:54 am
Forum: Lewis Structures
Topic: Brackets?
Replies: 1
Views: 49

Brackets?

Hi friends, I have a question about Lewis structure: for 3.39, 6th edition: a) NH4Cl has brackets around the NH4 section, but none around Cl. Why is that? How do you know which one to put around a bracket, and how do you know when you need a bracket in the first place? b) for K3P3-, there isnt any b...
by Edward Suarez 1I
Sat Nov 03, 2018 1:29 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 2.43 6th Edition
Replies: 1
Views: 55

2.43 6th Edition

Hi, so I had a few questions about this problem: What is the ground-state electron con guration expected for each of the following elements: (a) silver; (b) beryllium; (c) antimony; (d) gallium; (e) tungsten; (f) iodine? so particularly, a) the ground state is [Kr] 3d^10 4s^1 instead of [Kr] 3d^9 4s...
by Edward Suarez 1I
Sun Oct 28, 2018 10:48 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

Image

avogadro reax only
by Edward Suarez 1I
Sun Oct 28, 2018 8:29 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

Natalie Liu 4I wrote:A neutron walks into a shop and says,"I"d like a coke." The shopkeeper serves up the coke.
"How much will that be?" asks the neutron.
The shopkeeper replies,
"For you? No charge."


haha! that took me a while to understand but eventually i got it.
by Edward Suarez 1I
Thu Oct 25, 2018 4:25 am
Forum: Administrative Questions and Class Announcements
Topic: HW for this week [ENDORSED]
Replies: 4
Views: 165

Re: HW for this week [ENDORSED]

and by quantum world, i mean the first half of it (the topic we are being tested on for the second test)
by Edward Suarez 1I
Thu Oct 25, 2018 4:11 am
Forum: Administrative Questions and Class Announcements
Topic: HW for this week [ENDORSED]
Replies: 4
Views: 165

HW for this week [ENDORSED]

my discussion is on a friday, is it alright if I do homework questions based on quantum world, chapter 2, just for the extra practice/studying rather than on the new material not tested? or do i have to hw based on recent lectures?
by Edward Suarez 1I
Sun Oct 21, 2018 9:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 96
Views: 30818

Re: Advice from a Medical Student [ENDORSED]

thank you for the advice! i will def be taking this into consideration in my upcoming test.
by Edward Suarez 1I
Sun Oct 21, 2018 9:25 pm
Forum: Photoelectric Effect
Topic: Test #2
Replies: 9
Views: 206

Re: Test #2

Ronald Thompson 3I wrote:There's also a list on the 14a quantum world breakdown detailing everything you will need to know how to do for the test.


is this on the textbook? or syllabus? or where might i find this list
by Edward Suarez 1I
Sun Oct 21, 2018 9:23 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 2
Replies: 8
Views: 144

Re: Test 2

so test 2 will only be on the quantum world chapter, and none from fundamentals and week 4, right? sorry. just making sure!
by Edward Suarez 1I
Sun Oct 14, 2018 9:00 pm
Forum: Student Social/Study Group
Topic: Studying techniques
Replies: 12
Views: 235

Re: Studying techniques

make sure you complete a good variety of questions from the list of questions he provided us!
by Edward Suarez 1I
Sun Oct 14, 2018 8:57 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

i try to tell chemistry jokes, but there is no reaction :/
by Edward Suarez 1I
Thu Oct 11, 2018 5:56 pm
Forum: Administrative Questions and Class Announcements
Topic: chem test tmrw
Replies: 6
Views: 175

chem test tmrw

will the test give us the formula for the chemicals on the problems or will we have to figure out the formula from the name?
by Edward Suarez 1I
Sun Oct 07, 2018 11:04 pm
Forum: Student Social/Study Group
Topic: study group
Replies: 2
Views: 152

study group

looking for one more person for my study group! im a sophomore so another sophomore would be cool since this class is mostly frehsmen ahha
by Edward Suarez 1I
Sun Oct 07, 2018 11:02 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

did you hear the joke about cobalt, radon, and. yttrium?
it was CoRnY
by Edward Suarez 1I
Fri Oct 05, 2018 6:47 pm
Forum: Limiting Reactant Calculations
Topic: H11
Replies: 1
Views: 44

H11

So for this question, it gives us two different reactions where the second one uses the reactants of the product from the first one. When you balance the first one, the products are 2 moles of Fe3O4. and 1 mol of CO2. But for the second reaction, my TA put only Fe3O4 and CO2 and balanced it from the...

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