What does Silver say to Gold after he walks up to him at the bar?
AU, get outta here!
Search found 20 matches
Search found 20 matches • Page 1 of 1
- Sun Mar 19, 2017 11:04 am
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Midterm 2013 "Stochiometric amount"?
- Replies: 1
- Views: 340
Write out the balanced chemical equation for the formation of HBr: H2 + Br2 --> 2HBr. Because every 1 mol of H2 reacts with 1 mol of Br2, the stoichiometric amount of Br2 is equal to the moles of H2.
- Sun Mar 19, 2017 10:59 am
- Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
- Topic: Calculating relative ratio between two conformations
- Replies: 1
- Views: 589
Since it's a ratio, if you calculate it with delta G being positive, you will get the inverse of the ratio you would end up with if you used the negative delta G. It's not necessarily wrong, but it's easier to interpret the ratio if you just use a negative delta G.
- Tue Jan 17, 2017 2:30 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: HW 8.73 (Bond Enthalpies
- Replies: 5
- Views: 727
To calculate the enthalpy of a reaction using bond enthalpies you would have to add together all of the bond enthalpies of new bonds formed (which will be a negative value because formation of bonds releases energy) and add this value to the total of the bond enthalpies of all of the bonds broken (w...
- Tue Jan 17, 2017 2:17 pm
- Forum: Calculating Work of Expansion
- Topic: Significant Figures Question [ENDORSED]
- Replies: 1
- Views: 318
Generally, to avoid rounding error, you should always keep additional significant figures in your calculations and round off only the final answer. I'm not completely sure why the book has a differently rounded answer, but it could be because the editors used values for the constants with less signi...
- Sun Dec 04, 2016 1:05 pm
- Forum: Resonance Structures
- Topic: Do all resonance structures need to be FC=0?
- Replies: 4
- Views: 665
Resonance is a combination of all possible structures of a molecule, even the ones that are less stable. Therefore, include structures with formal charges not equal to zero. The most prominent structure, however, will be the one with the lowest formal charges.
- Sun Dec 04, 2016 1:02 pm
- Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
- Topic: 2006 Final Q8B
- Replies: 2
- Views: 725
On page 159 in the course reader it talks about salts as acids and bases. Certain ions display acidic or basic characteristics after dissolution. In the example you give, NH4Br dissociates into NH4+ and Br- in solution. Because NH4+ is an acid, it lowers the pH of the solution.
- Sun Dec 04, 2016 12:51 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: How to determine the strength of acids?
- Replies: 3
- Views: 535
In general, stronger acids are composed of more electronegative ions and larger ions.
One other thing to note is that even if a molecule has a symmetrical structure (i.e. tetrahedral), if the atoms surrounding the central atom are not equivalent, then the molecule will be polar (i.e H2ClBr2).
- Thu Nov 03, 2016 9:36 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 7742
- Views: 1060742
When the cops pull you over, just do what Heisenberg does. When they ask you, tell them you don't how fast you were going, just where you were.
- Mon Oct 24, 2016 10:39 am
- Forum: Quantum Numbers and The H-Atom
- Topic: Electrons having same energy between same shell?
- Replies: 1
- Views: 267
There is no difference in energy in the orbitals only for Hydrogen because there are no electron-electron interactions since the atom only has one electron. Many-electron atoms, however, are not degenerate (their orbitals have different energies to due interactions between electrons).