Search found 9 matches

by Jinghui Song 2J
Sat Mar 04, 2017 10:16 am
Forum: *Alkenes
Topic: CH3CHC(CH3)C(CH3)3 exercise 12 [ENDORSED]
Replies: 1
Views: 363

CH3CHC(CH3)C(CH3)3 exercise 12 [ENDORSED]

Can anyone answer why CH3CHC(CH3)C(CH3)3 is not 2,2,3-trimethyl-3-pentene?
Why does the answer say it is 3,3,4-trimethyl-2-pentene?
by Jinghui Song 2J
Wed Mar 01, 2017 9:42 am
Forum: *Electrophilic Addition
Topic: Question about Exercise 4.25
Replies: 1
Views: 251

Question about Exercise 4.25

In question 4.25, it asked us to use curved arrows to indicate electron movement in the reaction. It is a reaction between C2H4 and Br2. I don't understand why one of the Br atom is negatively charged while the other is positively charged, because I don't think there is any electronegativity differe...
by Jinghui Song 2J
Tue Feb 07, 2017 7:50 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Excercise 14.13 question d
Replies: 1
Views: 391

Excercise 14.13 question d

Write the half-reactions, the balanced equation for the cell reaction, and the cell diagram for each of the following skeletal equations: d. Au+(aq)--- Au(s)+Au3+(aq) in this reaction, the oxidation half equation should be Au+(aq)---Au3+(aq)+2e-, but the answer on the back of the book gives Au(aq)--...
by Jinghui Song 2J
Thu Jan 19, 2017 10:35 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Units involved in calculating the work done [ENDORSED]
Replies: 1
Views: 259

Units involved in calculating the work done [ENDORSED]

Hi guys, I always have problem converting all kinds of units so that i can get my final answer with the unit J or KJ. Is there any specific list of units or table of conversion between units that we can use? Otherwise, i'm afraid i cannot make sure what unit of work done i will get. For example, in ...
by Jinghui Song 2J
Tue Jan 17, 2017 7:56 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1011080

Re: Post All Chemistry Jokes Here

Check this out
Hilarious
by Jinghui Song 2J
Sun Nov 13, 2016 3:18 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1011080

Re: Post All Chemistry Jokes Here

lol
by Jinghui Song 2J
Sun Oct 30, 2016 10:05 am
Forum: Dipole Moments
Topic: Polar and Non-polar bond
Replies: 8
Views: 926

Polar and Non-polar bond

Hi

I am confused with how to decide which bonds are polar or non-polar, and how to decide which molecule is likely to be a polar or non-polar. Can anyone helps me out?

Thanks at advance.
by Jinghui Song 2J
Thu Oct 20, 2016 4:59 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Question on Chapter 3, Question 19? [ENDORSED]
Replies: 4
Views: 444

Re: Question on Chapter 3, Question 19? [ENDORSED]

Hello, I have the same question as well. But what seems confusing me is not how the configuration of electrons of Ni2+ should look like. What I don't understand is that why there are still two unpaired electrons? In [Ar]3d8, aren't there even number of electrons? I think every two electrons should b...
by Jinghui Song 2J
Fri Sep 30, 2016 10:19 am
Forum: Properties of Electrons
Topic: Kinetic Energy of Electrons [ENDORSED]
Replies: 4
Views: 1777

Re: Kinetic Energy of Electrons [ENDORSED]

First of all, I think we have to understand that, in photoelectric effect, the light shows its particle property, which means light is composed of photons. When the light strikes the metal surface, each electron on the metal surface can only absorb one single photon. The frequency of photon can deci...

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