Search found 12 matches

by 904779609
Sun Mar 19, 2017 10:17 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7461
Views: 991442

Re: Post All Chemistry Jokes Here

My current favorite chem joke:

My final grade!
by 904779609
Sun Mar 05, 2017 11:41 pm
Forum: *Alkanes
Topic: Isopropyl vs Propyl [ENDORSED]
Replies: 4
Views: 2927

Isopropyl vs Propyl [ENDORSED]

What is the difference between isopropyl and propyl?????
by 904779609
Sun Feb 26, 2017 11:20 pm
Forum: *Nucleophiles
Topic: Organic Chemistry
Replies: 2
Views: 325

Organic Chemistry

What is the difference between transition state molecules and intermediates?
by 904779609
Fri Feb 10, 2017 9:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Questions about ΔStotal and ΔU
Replies: 1
Views: 188

Re: Questions about ΔStotal and ΔU

I'm not sure about about the second part of your question, but ΔStotal is 0 when the equation is reversible and ΔU is 0 when the equation is at constant temperature, or isothermal.
by 904779609
Fri Feb 10, 2017 8:49 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.29
Replies: 2
Views: 321

Re: 14.29

ions,molecules with charges, are almost always aqueous! hope this helps!
by 904779609
Tue Feb 07, 2017 9:00 pm
Forum: Balancing Redox Reactions
Topic: Question 7 2013 Midterm
Replies: 2
Views: 250

Question 7 2013 Midterm

Hello can anyone explain why you use n=10 in the last equation solving for gibbs free energy in standard conditions?
by 904779609
Tue Feb 07, 2017 9:00 pm
Forum: Balancing Redox Reactions
Topic: Question 7 2013 Midterm
Replies: 1
Views: 184

Question 7 2013 Midterm

Hello can anyone explain why you use n=10 in the last equation solving for gibbs free energy in standard conditions?
by 904779609
Wed Jan 25, 2017 11:27 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Formulas to know
Replies: 3
Views: 603

Re: Formulas to know

What formula is used to calculate enthalpy density?
by 904779609
Wed Nov 30, 2016 8:54 pm
Forum: *Titrations & Titration Calculations
Topic: ICE
Replies: 5
Views: 493

Re: ICE

You're in the clear to approximate without using x if it is 10^-5, 10^-6 and so on. If it is 10^-3 you leave x and use the quadratic equation. But if it is 10^-4 you can take out x and to be sure you would then check if you're in the 5% range.
by 904779609
Sat Oct 22, 2016 7:29 pm
Forum: Lewis Structures
Topic: workbook Quiz 2 preparation #7
Replies: 3
Views: 344

workbook Quiz 2 preparation #7

Why does the central Xenon atom have the extra pair of electrons added to its lewis structure?
by 904779609
Sat Oct 15, 2016 3:59 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Questions on the two exceptions, Chromium and Copper. [ENDORSED]
Replies: 3
Views: 395

Re: Questions on the two exceptions, Chromium and Copper. [ENDORSED]

Are Copper and Chromium the only exceptions following this rule in the d-block? If not, how do you know whether they are an exception?
by 904779609
Sat Oct 15, 2016 3:34 pm
Forum: Lewis Structures
Topic: Drawing a Lewis Structure
Replies: 1
Views: 221

Re: Drawing a Lewis Structure

As long as the least electronegative atom is central in the structure and the correct number of valence electrons are accounted for, the order in which you arrange the dots doesn't matter.

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