Search found 15 matches
- Fri Mar 17, 2017 9:25 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Winter 2014 Q3
- Replies: 4
- Views: 801
Re: Winter 2014 Q3
Why is Cu(NO3)2 not considered for making a galvanic cell? Does it not also have good conducting qualities since nitrates are soluble in water?
- Fri Mar 17, 2017 7:54 pm
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: Practice Problems
- Replies: 23
- Views: 4138
Re: Practice Problems
Is tert-butane the same as methyl-propane?
- Fri Mar 17, 2017 6:41 pm
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: Winter 2015 Final #9A [ENDORSED]
- Replies: 4
- Views: 2058
Winter 2015 Final #9A [ENDORSED]
For question 9A, why is the correct answer trans (E) when the 4 Carbons and respective hydrogens have a higher atomic number than the Chlorine on the opposite side?
- Fri Mar 17, 2017 12:47 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Saying Thank You to Dr. Lavelle
- Replies: 490
- Views: 513943
Re: Saying Thank You to Dr. Lavelle
Dear Dr. Lavelle,
Thank you for putting in so much effort to help us succeed in the class. Chemistry Community, peer review sessions and all other resources have been helpful for me in Chem 14A/B. I am also incredibly grateful to have a professor who teaches with passion for the subject.
Thank you for putting in so much effort to help us succeed in the class. Chemistry Community, peer review sessions and all other resources have been helpful for me in Chem 14A/B. I am also incredibly grateful to have a professor who teaches with passion for the subject.
- Sun Feb 26, 2017 7:52 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009078
Re: Post All Chemistry Jokes Here
The optimist sees the glass half full. The pessimist sees the glass half empty. The chemist sees the glass completely full, half with liquid and half with air.
- Sun Feb 12, 2017 3:32 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Problem 14.15
- Replies: 4
- Views: 859
Re: Problem 14.15
@lilyjustine_1G I think the KOH is added to the cell diagram because an aqueous solution consisting of OH- ions is needed to supply the reaction with OH- ions. It's not added to the cathode side because Ni(OH)3 can supply with the OH- ions to Cd(OH)2 by itself. Not completely sure but this is the on...
- Wed Jan 18, 2017 8:47 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Problem 8.19
- Replies: 2
- Views: 544
Re: Problem 8.19
When I convert the copper into moles and use the molar specific heat for calculations, I end up with a different value for the heat than when I directly use the specific heat. Using molar specific heat, I get (500.0g Cu) * (1 mol/63.55g Cu) * (33J/K*mol) * (78K) = 20251 J for the copper. But using s...
- Sat Jan 14, 2017 2:50 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Internal Energy
- Replies: 1
- Views: 366
Internal Energy
Is the standard unit of internal energy in Joules or Kilojoules?
- Thu Nov 17, 2016 10:43 am
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Why is Pz orbital used to represent sigma bond in M.O theory? [ENDORSED]
- Replies: 1
- Views: 421
Why is Pz orbital used to represent sigma bond in M.O theory? [ENDORSED]
Is this experimentally determined, or is there a specific reason why it is the Pz, and not any of the other p orbitals that represent the sigma bond in Molecular Orbital theory?
- Tue Nov 01, 2016 6:50 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009078
Re: Post All Chemistry Jokes Here
I once told a chemistry joke. There was no reaction.
- Sun Oct 30, 2016 9:46 pm
- Forum: Trends in The Periodic Table
- Topic: Electron affinity
- Replies: 5
- Views: 1085
Re: Electron affinity
Do the noble gases have a high electron affinity even if they have a complete octet? Ex: Comparing Ne and Cl, which has a higher electron affinity? Electron affinity is the energy released when an extra electron is added. Knowing that noble gases have a complete octet and is at its lowest energy st...
- Sun Oct 23, 2016 11:37 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Electrons having same energy between same shell?
- Replies: 1
- Views: 486
Electrons having same energy between same shell?
On page 42 of the textbook it reads, "There are one 2s- and three 2p-orbitals in this shell; in hydrogen, they all have the same energy."
How come there is no energy difference between two different orbitals? Does this also apply to other elements or is it just hydrogen?
How come there is no energy difference between two different orbitals? Does this also apply to other elements or is it just hydrogen?
- Sun Oct 16, 2016 10:51 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009078
Re: Post All Chemistry Jokes Here
Are you a neuron?
Cause you got lots of action potential!
Cause you got lots of action potential!
- Sun Oct 09, 2016 10:00 pm
- Forum: *Black Body Radiation
- Topic: Examples of Black Body Radiation
- Replies: 4
- Views: 3522
Examples of Black Body Radiation
What is an example of black body radiation? Does it occur naturally or can it only be found in laboratory settings?
- Thu Sep 29, 2016 8:42 pm
- Forum: Properties of Light
- Topic: Wave Particle Duality
- Replies: 3
- Views: 799
Re: Wave Particle Duality
I remember that Professor Lavelle mentioned that when dealing with optics, use light as a wave, and use light as a particle when dealing with atoms and electrons.