Search found 30 matches
- Sat Mar 18, 2017 11:30 pm
- Forum: Balancing Redox Reactions
- Topic: Winter 2013 Final Q3A
- Replies: 1
- Views: 389
- Sat Mar 18, 2017 11:28 pm
- Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
- Topic: Chapter 3 Question 7
- Replies: 1
- Views: 1295
Re: Chapter 3 Question 7
It depends on the stability of the conformation that you are trying to draw. You always draw staggered for most stable conformations and always draw elipse for least stable.
- Sat Mar 18, 2017 11:24 pm
- Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
- Topic: Final 2014 #7E and 7F
- Replies: 1
- Views: 1170
Re: Final 2014 #7E and 7F
The important part isn't to worry about the Cl but to notice that the C(OH)3 is right next to the CN in guanche conformation. Either structure would have been acceptable as they would be equivalent in stablility in terms of conformation.
- Wed Mar 15, 2017 1:03 pm
- Forum: *Alkanes
- Topic: Final 2013
- Replies: 4
- Views: 1634
Re: Final 2013
Perhaps it is better to understand the general concept then certain structures. For example hexadecanol is a open chain of 16 carbons with an alcohol fucntional group on carbon 1. We know the naming up to 10 carbons, but we can imply that hexadcanol is 16 carbons using the prefixes. I feel like this...
- Fri Mar 10, 2017 1:27 pm
- Forum: *Alkanes
- Topic: PRIORITY IN NAMING
- Replies: 1
- Views: 665
PRIORITY IN NAMING
I hope this link helps everyone with their naming. It gives a summary of the priorities. Basically if a functional group has higher priority, it'll take precedence in the final naming of that compound. For example, if an alkene has a carboxylic group, let's say Hexene with a carboxylic group. Since ...
- Sun Mar 05, 2017 1:15 pm
- Forum: *Electrophiles
- Topic: Electrophiles and Nucleophiles for Quiz 3
- Replies: 3
- Views: 1871
Electrophiles and Nucleophiles for Quiz 3
Just wondering,
Do we only need to know how to IDENTIFY nucleophiles and electrophiles for quiz 3 or do we also need to be able to KNOW them based on strength as a nucleophile or electrophile?
Do we only need to know how to IDENTIFY nucleophiles and electrophiles for quiz 3 or do we also need to be able to KNOW them based on strength as a nucleophile or electrophile?
Re: Priority
I think what they are trying to say is talking about naming priority, as in, which name comes first. In this case, amines come first so in a molecule like Butanamine, and you have a double bond, the amine would have priority in the naming, and the double bond would be left out. Please correct me if ...
- Fri Feb 24, 2017 12:57 pm
- Forum: Second Order Reactions
- Topic: Third Order Reactions
- Replies: 5
- Views: 1515
Re: Third Order Reactions
also if you had a reaction with A+B+C -> products
that could be a third order reaction.
that could be a third order reaction.
- Fri Feb 24, 2017 12:57 pm
- Forum: Second Order Reactions
- Topic: Third Order Reactions
- Replies: 5
- Views: 1515
Re: Third Order Reactions
The rate constant for a third order reaction would also be M-2 s-1 if time was given in seconds.
- Mon Feb 13, 2017 5:37 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Midterm 2017
- Replies: 2
- Views: 539
Midterm 2017
Will we have to know calculations regarding a solubility constant Ksp for the test?
- Sun Feb 12, 2017 1:30 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Winter 2017
- Replies: 87
- Views: 20763
Re: Midterm Winter 2017
Was wondering if any of you would be able to answer the pikachu question for Winter 2014 Final Part A
- Sun Jan 29, 2017 10:06 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Gibbs Free Energy and Entropy
- Replies: 2
- Views: 580
Re: Gibbs Free Energy and Entropy
Yeah exactly, basically because the reaction is spontaneous, delta H will also tend to be negative and delta s will be positive so the reaction will be more stable as it moves from an unstable state to a stable state.
- Mon Jan 16, 2017 1:11 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Question 8.55
- Replies: 1
- Views: 564
Question 8.55
So was wondering if the 2nd equation needed to be balanced cause in its current state it isn't and the problem isn't possible otherwise. Need guidance. 8.55 Barium metal is produced by the reaction of aluminum metal with barium oxide. From the standard reaction enthalpies, 2 Ba + O2 -> 2BaO delta H ...
- Sat Jan 14, 2017 2:52 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Internal Energy
- Replies: 1
- Views: 366
Re: Internal Energy
The standard unit is Joules for internal energy
- Sat Dec 03, 2016 11:06 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Derivations [ENDORSED]
- Replies: 2
- Views: 731
Derivations [ENDORSED]
What does Dr. Lavelle mean when he says no derivations on the exam?
- Fri Nov 25, 2016 10:10 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Final Exam 2012 Q5C [ENDORSED]
- Replies: 1
- Views: 495
Final Exam 2012 Q5C [ENDORSED]
In the H2+I2 -><- 2HI reaction, why does removing a small amount of I2 make the reaction favor neither products or reactants?
- Sun Nov 13, 2016 12:52 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Chapter 11.29 HW
- Replies: 1
- Views: 1049
Re: Chapter 11.29 HW
When you are saying Q do you mean Kq? the equilibrium constant. I am going to base my explanation on that fact. If Kq = 1 then the reaction would be at equilibrium and would favor neither products or reactants. The reason being in the calculation of the equilibrium constant ( products/reactants) a v...
- Sun Nov 13, 2016 12:49 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Quiz 3 Prep 2014 #6
- Replies: 1
- Views: 482
- Sun Nov 13, 2016 12:46 pm
- Forum: Ideal Gases
- Topic: Quiz 3 Prep
- Replies: 2
- Views: 682
Re: Quiz 3 Prep
The answer to this question would be high temperature and lower pressure. If we look at the Kp equilibrium constant, it would be products/reactants. Since we want this Kp to be low so that the equation favors the products, we would want equilibrium pressure to be lower. For high temp, notice the cha...
- Sun Oct 30, 2016 10:13 pm
- Forum: Hybridization
- Topic: Conceptual question
- Replies: 1
- Views: 416
Re: Conceptual question
Could you clarify what you mean by election promotion, I don't remember seeing it in the book or course reader.
- Tue Oct 25, 2016 12:45 pm
- Forum: Resonance Structures
- Topic: (NH2)COCH3 Molecule structure
- Replies: 1
- Views: 926
(NH2)COCH3 Molecule structure
Hi everyone,
I'm not quite sure how to draw this molecule structure. I am unclear as to whether it should have the 2 Cs both bonded to the O in the middle or the two Cs bonded together and the O sticking out from the first C without the Hydrogens.
I'm not quite sure how to draw this molecule structure. I am unclear as to whether it should have the 2 Cs both bonded to the O in the middle or the two Cs bonded together and the O sticking out from the first C without the Hydrogens.
- Tue Oct 25, 2016 12:43 pm
- Forum: Resonance Structures
- Topic: Resonance vs. Lewis Structure?
- Replies: 9
- Views: 2253
Re: Resonance vs. Lewis Structure?
Usually, you will know that you have a resonance structure when it is obvious that the double bond in the molecule can be used interchangeably between the other atoms and the central atom.
- Sun Oct 23, 2016 1:20 am
- Forum: Student Social/Study Group
- Topic: De Neve Study Group
- Replies: 35
- Views: 4670
Re: De Neve Study Group
What time is the study sesh happening?
- Sat Oct 22, 2016 11:11 am
- Forum: Lewis Structures
- Topic: P, S, Cl accomodating more than 8 valence e-
- Replies: 1
- Views: 696
Re: P, S, Cl accomodating more than 8 valence e-
If we look at the Periodic Table, P, S, Cl are on the third period, which means that they can use the 3d orbital to have an expanded octet. That being said, P has 5 Valence e- S has 6 valence e- and Cl has 7 valence e-. The total number of bonds that can be made for P is 5 and for S will be 6. Usual...
- Sun Oct 16, 2016 5:16 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Minimum Indeterminacy [ENDORSED]
- Replies: 6
- Views: 1713
Re: Minimum Indeterminacy [ENDORSED]
In regards to why it's multiplied by 2. +-0.1 is only one arm of the indeterminancy factor. delta V refers to the both arms or sides of the indeterminancy so we must use 0.2 instead of 0.1 as velocity can either be =0.1 or -0.1.
- Sun Oct 09, 2016 12:48 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3001160
Re: Post All Chemistry Jokes Here
Girl are you made of Copper and Tellerium? Because you sure are CuTe
- Thu Sep 29, 2016 11:24 am
- Forum: Einstein Equation
- Topic: Homework 1.69 [ENDORSED]
- Replies: 4
- Views: 1211
Re: Homework 1.69 [ENDORSED]
Hopefully we will also be able to know how many joules per eV to make the conversion
- Thu Sep 29, 2016 11:22 am
- Forum: Einstein Equation
- Topic: Homework 1.69 [ENDORSED]
- Replies: 4
- Views: 1211
Re: Homework 1.69 [ENDORSED]
Thanks for the Responses,
Maggie, your explanation makes sense however, the absorption spectra of the lithium photomultiplier is not known. I assumed from Chem Mod's work that as long as the energy emitted by the laser is higher than that of the work function, it should be fine.
Jimmy Z.
Maggie, your explanation makes sense however, the absorption spectra of the lithium photomultiplier is not known. I assumed from Chem Mod's work that as long as the energy emitted by the laser is higher than that of the work function, it should be fine.
Jimmy Z.
- Wed Sep 28, 2016 11:52 pm
- Forum: Einstein Equation
- Topic: Homework 1.69 [ENDORSED]
- Replies: 4
- Views: 1211
Homework 1.69 [ENDORSED]
Question is as follows: In a recent suspense fi lm, two secret agents must penetrate a criminal’s stronghold monitored by a lithium photomultiplier cell that is continually bathed in light from a laser. If the beam of light is broken, an alarm sounds. The agents want to use a handheld laser to illum...
- Tue Sep 27, 2016 8:54 pm
- Forum: Balancing Chemical Reactions
- Topic: H.13 How To Write This Chemical Equation?
- Replies: 4
- Views: 3530
Re: H.13 How To Write This Chemical Equation?
Hi,
This is Jimmy from Lecture 1
I just got to this problem and I think the problem says 2 equations and not 3. In this case
one of the equations would be N2+O2 -> 2NO and the other would be 2NO + O2 ->2NO2
Hope this helps!
This is Jimmy from Lecture 1
I just got to this problem and I think the problem says 2 equations and not 3. In this case
one of the equations would be N2+O2 -> 2NO and the other would be 2NO + O2 ->2NO2
Hope this helps!