Search found 49 matches
- Sat Mar 18, 2017 4:15 pm
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: Why is this cis?
- Replies: 7
- Views: 1393
Re: Why is this cis?
I understand that but what I'm confused with is what molecules we are suppose to be analyzing here for their atomic number. Thank you
- Sat Mar 18, 2017 2:11 pm
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: Why is this cis?
- Replies: 7
- Views: 1393
Re: Why is this cis?
Thank you but I'm
Still confused which moleculares are the highest priority? Versuses what other molecules are lowest priority?
Still confused which moleculares are the highest priority? Versuses what other molecules are lowest priority?
- Sat Mar 18, 2017 11:12 am
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: Why is this cis?
- Replies: 7
- Views: 1393
Why is this cis?
Could someone please explain to me why this is cis? Thank you!!
- Fri Mar 17, 2017 2:59 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Simplified Nernst equation
- Replies: 1
- Views: 485
Simplified Nernst equation
Could anyone explain how to get .0256... because every time I calculate R times T divided by F i get a different number
- Thu Mar 16, 2017 10:12 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Practice test #3 2014
- Replies: 1
- Views: 359
Practice test #3 2014
Can someone please explain number three? I don't know why cu and fe couldn't be used in the galvanic cell. Thank you!
- Wed Mar 15, 2017 9:35 pm
- Forum: *Cycloalkenes
- Topic: Numbering
- Replies: 1
- Views: 699
Re: Numbering
Would the double bond still be number 1 or would it then be 5?
- Wed Mar 15, 2017 9:34 pm
- Forum: *Cycloalkenes
- Topic: Numbering
- Replies: 1
- Views: 699
Numbering
Why can't this be numbered how I have it in red? Thank you!
- Wed Mar 15, 2017 10:10 am
- Forum: *Ketones
- Topic: Question on number 27?
- Replies: 2
- Views: 774
Question on number 27?
Wouldn't 27 not be a correct name because you give priority to the functional groups?
- Wed Mar 15, 2017 10:01 am
- Forum: *Alcohols
- Topic: What type of alcohol?
- Replies: 1
- Views: 683
What type of alcohol?
Why is number 20 a tertiary alcohol isn't it just attached to one carbon? (The carbon i outlined in purple) thank you!!!! :)))
- Tue Mar 14, 2017 6:17 pm
- Forum: *Alcohols
- Topic: Homework question
- Replies: 1
- Views: 639
Homework question
Why in 18 is it named 2 but in 19 it's called secondary? (see photo below) thank you so much!!! Also why does the alcohol get priority over the two methyl groups? Thanks!
- Tue Mar 14, 2017 1:00 pm
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: When to use cis or trans?
- Replies: 1
- Views: 396
When to use cis or trans?
How do you know when to use cis or trans at all? Like I know what the difference is between the two but how do you know when to introduce one of those two terms at all? For example for this homework question (28) I would have just called it 3,4,6 trimethyl 3-octene but the correct name is adding a t...
- Tue Mar 14, 2017 12:55 pm
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: Homework question
- Replies: 2
- Views: 378
Homework question
Why wouldn't this structure be Cis because the methyl and bromo group are on the same side of the double bond? Thanks!
- Tue Mar 14, 2017 9:25 am
- Forum: *Cycloalkanes
- Topic: What is this structure?
- Replies: 2
- Views: 871
What is this structure?
Could anyone please tell me the name of this structure in part c? (See picture below). Thank you so much! :)
- Mon Mar 13, 2017 4:44 pm
- Forum: *Cycloalkenes
- Topic: Homework question #21 a
- Replies: 1
- Views: 771
Homework question #21 a
Could someone please explain to me why this structure pictured below is 5,1,3 instead of 1-methyl cyclopenta, 2,4 diene because that would be lower numbers? (The red is what the solution manuals answer is)
- Mon Mar 13, 2017 4:31 pm
- Forum: *Cycloalkanes
- Topic: Question on organic homework #17
- Replies: 1
- Views: 716
Question on organic homework #17
Could someone please explain why the answer key numbered the structure like so? (See picture correct numbers are in red). Don't you want the one that comes first alphabetically (butyl) to be one to have a lower #? Thank you so much! :)
- Mon Mar 13, 2017 4:28 pm
- Forum: Balancing Redox Reactions
- Topic: Help on practice test
- Replies: 4
- Views: 526
Re: Help on practice test
Here is the picture of the solutions
- Mon Mar 13, 2017 4:27 pm
- Forum: Balancing Redox Reactions
- Topic: Help on practice test
- Replies: 4
- Views: 526
Re: Help on practice test
The answer key says n is 4?
- Sun Mar 12, 2017 2:19 pm
- Forum: Balancing Redox Reactions
- Topic: Help on practice test
- Replies: 4
- Views: 526
Help on practice test
Could someone help me find the "n" for Q4 on practice exam 2013? Thank you!
The equation is 2 Fe + 2H20 + O2---> 2Fe(OH)2
The equation is 2 Fe + 2H20 + O2---> 2Fe(OH)2
- Mon Mar 06, 2017 4:08 pm
- Forum: *Free Energy of Activation vs Activation Energy
- Topic: Homework question 4.30
- Replies: 2
- Views: 1022
Homework question 4.30
The activation energy in an organic reaction is known to be 125kj/mil. Wil this reaction occur at room temperature?
The answer is no but I'm not sure how to figure this out. Thank you in advance!
The answer is no but I'm not sure how to figure this out. Thank you in advance!
- Sun Mar 05, 2017 3:13 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Activated complex
- Replies: 1
- Views: 345
Activated complex
One of the homework questions for chapter 15 is draw a proposed structure for the activated complex. In general how do you figure this out? Thank you! :)
- Thu Mar 02, 2017 2:54 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: help on 15.63
- Replies: 1
- Views: 378
help on 15.63
the question is: the rate constant of the reaction between CO2 and OH- in the aqueous solution to give the HCO3- ion is 1.5X10^10L*mol^-1*s*-1 at 25 degrees C. Determine the rate constant at 37 degrees celcius given that the activation energy for the rxn is 38kj/mol I am confused on what the solutio...
- Wed Mar 01, 2017 2:17 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Question from midterm
- Replies: 2
- Views: 458
Question from midterm
I am unable to go to the review on Friday, so was wondering if someone could help me with this question? Thank you!! :) Q2: A system consists of two glass vessels (containers A and B) and a valve connection them. During the following process this system is maintained at 25 degrees C. Initially, the ...
- Wed Mar 01, 2017 2:12 pm
- Forum: General Rate Laws
- Topic: Questions from last quiz
- Replies: 1
- Views: 368
Questions from last quiz
One of the questions i got wrong from the last quiz was asking us to write the rate law for the overall reaction. the slow step is H202(aq)+2I-(aq)---->I2(s) +2OH- Is the correct answer just rate=k[H2-2][I-]? How would you know what the exponents are because you dont know the order or reaction and a...
- Fri Feb 03, 2017 3:26 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: As i goes to zero...?
- Replies: 1
- Views: 276
As i goes to zero...?
Can someone please explain what the "i" represents in the states in the limit as i goes to zero? Thank you!
- Fri Feb 03, 2017 3:21 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: The Salt Bridge
- Replies: 1
- Views: 323
The Salt Bridge
I am kind of confused on how exactly the salt bridge works. Could someone please explain to me how the transfer of ions would keep the solution neutral? Like using Cl- ions, isn't that very electronegative and would just pull more electrons to the cathode, which would cause the cathode to start reje...
- Sat Jan 28, 2017 12:18 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Q rev?
- Replies: 1
- Views: 4910
Q rev?
In the equation delta S=q rev/T, what does rev stand for and how do you get that value? Thank you!
- Thu Jan 26, 2017 1:53 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Will we be given equation sheet on quiz?
- Replies: 2
- Views: 446
Will we be given equation sheet on quiz?
Will we be given this equation sheet on our quiz like we were last quarter? Thank you!
- Mon Jan 23, 2017 6:27 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Phase subscript question
- Replies: 2
- Views: 538
Phase subscript question
What does the subscript gr mean? E.g homework 8.67 C(gr)? Thank you!
- Tue Jan 17, 2017 4:47 pm
- Forum: Phase Changes & Related Calculations
- Topic: Practice Quizes
- Replies: 10
- Views: 1090
Practice Quizes
Are there any answers or solution manuals available to us for the practice quiz in the course reader or way to find out if we are doing the problems correctly? Thank you! :)
- Tue Jan 10, 2017 6:10 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: delta H and delta Q
- Replies: 2
- Views: 6214
delta H and delta Q
What is the difference between delta H and delta Q? Thank you!!
- Tue Nov 29, 2016 6:50 am
- Forum: Administrative Questions and Class Announcements
- Topic: Class on Friday
- Replies: 2
- Views: 609
Class on Friday
Just to confirm, although we are not covering any. new material, there is still class on Friday? Thank you!
- Sun Nov 27, 2016 9:09 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Fall 2014 Final Exam #6A
- Replies: 1
- Views: 384
Fall 2014 Final Exam #6A
can someone please explain this step? Kc=0.045 in the solutions, it says Kc=(x/1.072)^2/((0.05-x)/1.072)) and then it jumps to 0.045=.932836x^2/0.05-x
Thank you!
Thank you!
- Sat Nov 26, 2016 4:16 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Chapter 11 #117
- Replies: 1
- Views: 291
Chapter 11 #117
Can someone please explain 117 to me? Thank you so much! SO3 + NO <----> SO2 +NO2. K=6.0 X 10^3 Calculate the amount of NO that must be added to a 1L vessel containing .245 mol SO3 to form .240 mol SO2 at equilibrium In the solution manual they start out by subtracting .240 moles from.245 but im not...
- Sat Nov 26, 2016 10:48 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Chapter 11 #89
- Replies: 1
- Views: 336
Chapter 11 #89
The question asks you to calculate the equil constnat for the rxn, and gives a graph of partial pressure, ranging up to 30. However, in the solution manual, they put the partial pressure over 100, but i didnt think the graph was giving percent? thank you!
- Thu Nov 24, 2016 5:18 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: chapter 11 #67 help happy thanksgiving! :)
- Replies: 2
- Views: 409
Re: chapter 11 #67 help happy thanksgiving! :)
Thank you!!
- Thu Nov 24, 2016 11:25 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: chapter 11 #67 help happy thanksgiving! :)
- Replies: 2
- Views: 409
chapter 11 #67 help happy thanksgiving! :)
Question: The reaction 2HCl(g) <----> H2(g) +Cl2(g) has K=3.2 X 10^-34 at 298K. The initial partial pressures are H2, 1.0 bar; HCL, 2.0 bar; and Cl2, 3.0 bar. At equilibrium there is 1.0 mol H2(g). What is the volume of the container? The answer solution mentions that reactants are strongly favored,...
- Sat Nov 19, 2016 7:45 am
- Forum: Administrative Questions and Class Announcements
- Topic: Discussion next week? [ENDORSED]
- Replies: 5
- Views: 3223
Discussion next week? [ENDORSED]
Will there be discussion sections next week? Thank you!
- Tue Nov 15, 2016 5:42 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Fall 2014 Quiz #8 [ENDORSED]
- Replies: 2
- Views: 534
Re: Fall 2014 Quiz #8 [ENDORSED]
Thank you!
- Tue Nov 15, 2016 3:12 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Fall 2014 Quiz #8 [ENDORSED]
- Replies: 2
- Views: 534
Fall 2014 Quiz #8 [ENDORSED]
The question is consider the following rxn: NH4HS (s) <---->NH3(g)+H2S(g) If the value of Kp is .11 at 300K, calculate the equilibrium partial pressure of NH3(g) starting from pure NH4HS. The answer is .33atm, but I don't know how to get that I feel like we need the initial concentration of somethin...
- Fri Nov 11, 2016 4:07 pm
- Forum: Naming
- Topic: Ligand Quizlet
- Replies: 2
- Views: 505
Ligand Quizlet
I made a ligand quizlet if anyone wants flashcards for their naming.username GraceE2512
:) good luck studying!
here's the link too: https://quizlet.com/_2rs25s
:) good luck studying!
here's the link too: https://quizlet.com/_2rs25s
- Wed Nov 09, 2016 4:38 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: #1 chapter 11 [ENDORSED]
- Replies: 2
- Views: 389
Re: #1 chapter 11 [ENDORSED]
oooh I see thank you so much!!!!
- Wed Nov 09, 2016 10:50 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: #1 chapter 11 [ENDORSED]
- Replies: 2
- Views: 389
#1 chapter 11 [ENDORSED]
We have to state whether the statement is true or false -An equilibrium reaction is not affected by increasing the concentrations of products Answer book: False because equil. reactions are affected by the presence of both reactants and products -An equil. reaction with a higher pressure of reactant...
- Mon Oct 31, 2016 7:25 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: bond angle
- Replies: 3
- Views: 561
bond angle
for our midterm, will we be asked to give the bond angle of each shape? if so, how do we calculate the bond angle or is it just something we have to memorize. thank you!
- Wed Oct 19, 2016 5:52 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: chapter 2 Question 2.29
- Replies: 1
- Views: 371
chapter 2 Question 2.29
the Question is how many electrons can have the following quantum #s if all of that subshell are filled? (a) n=4, l=2. the answer in the manual is 6. why isn't it 10 because you can have m sub l=-2,-1,0,1,2 (5 subshells) and then two electrons in each of those because they have differnt spins? Thank...
- Wed Oct 19, 2016 5:42 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Chapter 2 Question 2.43 [ENDORSED]
- Replies: 2
- Views: 481
Chapter 2 Question 2.43 [ENDORSED]
the question is asks "write the ground-state electron configuration expected for each of the following elements.
can someone explain to me why the answer to silver is [kr] 4d105s1 and not 4d9? Because don't we count 9 valence electrons in the d to get to silver? thank you!
can someone explain to me why the answer to silver is [kr] 4d105s1 and not 4d9? Because don't we count 9 valence electrons in the d to get to silver? thank you!
- Sun Oct 09, 2016 3:26 pm
- Forum: DeBroglie Equation
- Topic: #9 on practice test [ENDORSED]
- Replies: 3
- Views: 654
#9 on practice test [ENDORSED]
For #9 on practice quiz fall 2014, is there a reason why the answer in the course book only has one significant figure? Also does anyone have any good ways to remember all the equations for the quiz this week? thank you! :)
- Mon Oct 03, 2016 11:50 am
- Forum: DeBroglie Equation
- Topic: Question about baseball wavelenghts [ENDORSED]
- Replies: 3
- Views: 977
Question about baseball wavelenghts [ENDORSED]
Im confused as to why we can't detect the wavelengths of baseball's momentum but we can of electrons? It was something that was repeated in the video module, but I am still confused as to why that is. Thank you!
- Wed Sep 28, 2016 10:58 am
- Forum: Properties of Light
- Topic: Photoelectric effect video
- Replies: 3
- Views: 530
Re: Photoelectric effect video
Thank you!
- Wed Sep 28, 2016 10:41 am
- Forum: Properties of Light
- Topic: Photoelectric effect video
- Replies: 3
- Views: 530
Photoelectric effect video
I was watching the video module for the photoelectric effect and it mentioned how increasing the intensity did not cause electrons to be released from the metal..why is that? Why does shortening the wavelength release electrons. isn't the relationship between intensity and wavelength an inverse rela...