Search found 23 matches

by Jennifer Ngo 1M
Sat Mar 18, 2017 2:27 am
Forum: *Cycloalkanes
Topic: Root naming
Replies: 2
Views: 408

Root naming

Hope this question makes sense.. These are two examples taken from Problem Set 2

(E )-3-bromo-2,4-dimethylhepta-2,4-diene
(Z)-4-ethyl-6-methylhept-3-enal

Why is one hepta- and one hept-? What are the rules when it comes to adding/dropping the -a?
by Jennifer Ngo 1M
Fri Mar 17, 2017 10:37 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Winter 2016 Final Exam Q2A [ENDORSED]
Replies: 7
Views: 758

Re: Winter 2016 Final Exam Q2A [ENDORSED]

Kind of unrelated question but: why is it 2X on the top? I didn't quite get that in the review session. Do you mind explaining that part? The reactants are half of the products aka the products are double the reactants. He made the concentration of the reactants "x," so products would be ...
by Jennifer Ngo 1M
Mon Mar 06, 2017 9:28 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 15481

Re: Quiz 3 Winter 2017

Leo_Navejas_3B wrote:For #4 Why isn't it 1-butyl-3,4 dimethylcyclohexane?

Page 96 in the course reader should help.
by Jennifer Ngo 1M
Sun Mar 05, 2017 1:36 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 15481

Re: Quiz 3 Winter 2017

For number 7, are we expected to know what 2-butene is?
by Jennifer Ngo 1M
Sat Mar 04, 2017 11:53 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 883225

Re: Post All Chemistry Jokes Here

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by Jennifer Ngo 1M
Sun Feb 19, 2017 10:02 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 883225

Re: Post All Chemistry Jokes Here

did you know the sun doesn't have to go to college cause it already has 28 million degrees :-)
by Jennifer Ngo 1M
Tue Feb 14, 2017 3:09 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Midterm 2014 Question 6
Replies: 1
Views: 314

Re: Midterm 2014 Question 6

Dr. Lavelle said for that specific problem sigfigs were not taken into consideration
by Jennifer Ngo 1M
Tue Feb 14, 2017 3:06 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Question 8, Winter 2013 Midterm
Replies: 1
Views: 264

Re: Question 8, Winter 2013 Midterm

I think we're going to be given a chart with various reduction potentials
by Jennifer Ngo 1M
Fri Feb 10, 2017 12:31 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 883225

Re: Post All Chemistry Jokes Here

What do you call an acid with an attitude...
A mean o' acid
by Jennifer Ngo 1M
Fri Feb 03, 2017 1:05 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 883225

Re: Post All Chemistry Jokes Here

What did Cesium and Iodine do Saturday Night?
Watch CsI.
by Jennifer Ngo 1M
Sat Jan 28, 2017 11:36 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: General Explanation of sig figs
Replies: 1
Views: 265

Re: General Explanation of sig figs

1. Zeros don't count... (i.e 400 has one sigfig) 2. UNLESS it is after a decimal (i.e 4.0 has two sigfigs and 40.0 has three) General rule of thumb is to not round anything until your final calculation aka the answer. Once you get the answer, you take the count of the number that has the least sigfi...
by Jennifer Ngo 1M
Sat Jan 21, 2017 8:24 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 883225

Re: Post All Chemistry Jokes Here

What did the chemist say when he found two helium atoms?

HeHe
by Jennifer Ngo 1M
Fri Jan 13, 2017 7:51 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 883225

Re: Post All Chemistry Jokes Here

Did you hear about the man who got cooled to absolute zero?
....
He's 0K now.
by Jennifer Ngo 1M
Fri Nov 25, 2016 12:41 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 883225

Re: Post All Chemistry Jokes Here

I told a joke about helium but no one reacted..
by Jennifer Ngo 1M
Fri Nov 18, 2016 10:21 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 883225

Re: Post All Chemistry Jokes Here

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by Jennifer Ngo 1M
Thu Nov 10, 2016 5:04 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Heteronuclear diatomic molecular orbital
Replies: 2
Views: 288

Re: Heteronuclear diatomic molecular orbital

Probably not as formal of an answer you're looking for, but basically it has to do with the idea that "you're only as strong as your weakest link." We can't use the Z>8 diagram if one of the elements in the bond does not have an atomic number more than 8. Whereas Z<8 both are applicable be...
by Jennifer Ngo 1M
Fri Nov 04, 2016 10:04 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 883225

Re: Post All Chemistry Jokes Here

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by Jennifer Ngo 1M
Wed Oct 26, 2016 10:30 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 883225

Re: Post All Chemistry Jokes Here

Why does hamburger yield lower energy than steak?





Because it's in the ground state.
by Jennifer Ngo 1M
Fri Oct 21, 2016 12:07 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge Meaning
Replies: 2
Views: 543

Re: Formal Charge Meaning

Formal charge is the difference between the number of valence electrons of each atom and the number of electrons the atom is associated with. Formal charge assumes any shared electrons are equally shared between the two bonded atoms.
by Jennifer Ngo 1M
Sat Oct 08, 2016 7:58 pm
Forum: SI Units, Unit Conversions
Topic: Quiz Prep: Conversions [ENDORSED]
Replies: 2
Views: 385

Re: Quiz Prep: Conversions [ENDORSED]

Yes, Lavelle told our lecture that we will need to know all the SI units. My TA said that we should know from as big as giga- and little as pico-.
by Jennifer Ngo 1M
Fri Sep 30, 2016 5:32 pm
Forum: Photoelectric Effect
Topic: Photoelectric effect
Replies: 2
Views: 290

Re: Photoelectric effect

Yes, electrons will be emitted as long as the threshold energy is met. If the amount of energy in the photon is equal to the threshold energy, there is just no kinetic energy.

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