Search found 20 matches

by Ishita_Dubey_2D
Sun Mar 19, 2017 11:18 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011653

Re: Post All Chemistry Jokes Here

What does Silver say to Gold after he walks up to him at the bar?

AU, get outta here!
by Ishita_Dubey_2D
Sun Mar 19, 2017 11:13 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011653

Re: Post All Chemistry Jokes Here

What's the name of James Bond's Eskimo cousin?

Polar Bond.
by Ishita_Dubey_2D
Sun Mar 19, 2017 11:12 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011653

Re: Post All Chemistry Jokes Here

Why was the mole of oxygen molecules so excited when he left the bar?

He got Avogadro's number.
by Ishita_Dubey_2D
Sun Mar 19, 2017 11:10 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011653

Re: Post All Chemistry Jokes Here

What show do Cesium and Iodine love watching together?

CSI
by Ishita_Dubey_2D
Sun Mar 19, 2017 11:04 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Midterm 2013 "Stochiometric amount"?
Replies: 1
Views: 324

Re: Midterm 2013 "Stochiometric amount"?

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.
by Ishita_Dubey_2D
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: 557

Re: Calculating relative ratio between two conformations

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.
by Ishita_Dubey_2D
Sun Mar 19, 2017 10:55 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011653

Re: Post All Chemistry Jokes Here

Have you heard about the chemist reading a book about helium?

He just couldn't put it down.
by Ishita_Dubey_2D
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: 701

Re: HW 8.73 (Bond Enthalpies

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...
by Ishita_Dubey_2D
Tue Jan 17, 2017 2:17 pm
Forum: Calculating Work of Expansion
Topic: Significant Figures Question [ENDORSED]
Replies: 1
Views: 304

Re: Significant Figures Question [ENDORSED]

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...
by Ishita_Dubey_2D
Sun Dec 04, 2016 1:05 pm
Forum: Resonance Structures
Topic: Do all resonance structures need to be FC=0?
Replies: 4
Views: 639

Re: Do all resonance structures need to be FC=0?

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.
by Ishita_Dubey_2D
Sun Dec 04, 2016 1:02 pm
Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
Topic: 2006 Final Q8B
Replies: 2
Views: 689

Re: 2006 Final Q8B

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.
by Ishita_Dubey_2D
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: 495

Re: How to determine the strength of acids?

In general, stronger acids are composed of more electronegative ions and larger ions.
by Ishita_Dubey_2D
Sun Dec 04, 2016 12:41 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011653

Re: Post All Chemistry Jokes Here

I was going to make a joke about sodium and hydrogen...

But NaH.
by Ishita_Dubey_2D
Sun Dec 04, 2016 12:39 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011653

Re: Post All Chemistry Jokes Here

What kind of fish is made out of only two sodium atoms?

2 Na
by Ishita_Dubey_2D
Thu Nov 03, 2016 10:36 pm
Forum: Hybridization
Topic: Polar vs Non polar
Replies: 5
Views: 969

Re: Polar vs Non polar

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).
by Ishita_Dubey_2D
Thu Nov 03, 2016 9:36 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011653

Re: Post All Chemistry Jokes Here

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.
by Ishita_Dubey_2D
Tue Oct 25, 2016 7:03 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011653

Re: Post All Chemistry Jokes Here

Oxygen and Magnesium went out on a date... OMg!!!
by Ishita_Dubey_2D
Mon Oct 24, 2016 12:47 pm
Forum: Trends in The Periodic Table
Topic: Effective Nuclear Charge
Replies: 2
Views: 965

Effective Nuclear Charge

How exactly is effective nuclear charge calculated? And do electrons in the same orbital experience the same effective nuclear charge?
by Ishita_Dubey_2D
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: 252

Re: Electrons having same energy between same shell?

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).
by Ishita_Dubey_2D
Sat Oct 08, 2016 3:37 pm
Forum: Student Social/Study Group
Topic: Hedrick Summit Study Group Chem 14A
Replies: 29
Views: 2562

Re: Hedrick Summit Study Group Chem 14A

Hi! I may be pretty late to this but are you all planning on having another study session any time soon?

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