Search found 31 matches

by TramHo2G
Sun Mar 19, 2017 11:45 am
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Newman Projection
Replies: 2
Views: 670

Newman Projection

How do you number the carbons in a newman projection? I know that the big circle in the back is the second carbon and the point in the middle of the Y is the first carbon? Where is the third and fourth carbon located?
by TramHo2G
Fri Mar 17, 2017 10:28 pm
Forum: *Ethers
Topic: Priority of Ethers
Replies: 4
Views: 1195

Re: Priority of Ethers

Are the highest priority groups in Professor Lavelle's example the chlorine and ether?
by TramHo2G
Fri Mar 17, 2017 10:08 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Details and Review Sessions Winter 2017
Replies: 114
Views: 13775

Re: Final Exam Details and Review Sessions Winter 2017

yoonjong_han_3F wrote:do we need to know how to draw ether, carboboxylic acid, or amines and cyclic amines??
it is so hard!!!!


We will have to know how to identify them in a structure. I'm not sure if we will have to draw them, but it would be safe to know how to.
by TramHo2G
Wed Mar 15, 2017 11:55 pm
Forum: *Alcohols
Topic: 2.21
Replies: 1
Views: 487

2.21

So for this problem in the organic textbook on pg. 97, it asks to name the compound of a structure including alcohol. I understand why the carbon with the functional group,alcohol, was numbered first, but why did the numbering continue towards methyl? I thought that when there is a double bond, we a...
by TramHo2G
Mon Mar 06, 2017 9:33 pm
Forum: *Cycloalkanes
Topic: Cyclo-
Replies: 7
Views: 893

Re: Cyclo-

Kaitlin_Ryan_ 3K wrote:When numbering carbons on a Cyclo- molecule, which carbon is numbered first?


Chem_Mod said in another post that "In the case of cycloalkanes, the substituent with the highest priority will have the first number, and then work to find the lowest constituent numbering".
by TramHo2G
Sat Mar 04, 2017 12:56 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7666
Views: 1036176

Re: Post All Chemistry Jokes Here

If a queen farts, is it considered a noble gas?
by TramHo2G
Wed Feb 22, 2017 8:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 2 Winter 2017
Replies: 160
Views: 15439

Re: Quiz 2 Winter 2017

For #8, how do you get your units to become 6.06 minutes?
I know you have to use the first-order integrated rate law to find the time.
I did ln(0.35 M/1.50 M)/-4.00*10^-3 s^-1
Is this correct?
by TramHo2G
Wed Feb 22, 2017 7:52 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7666
Views: 1036176

Re: Post All Chemistry Jokes Here

Are you a catalyst?
Cause you increase the rate of my heart.
by TramHo2G
Wed Feb 15, 2017 3:00 pm
Forum: Balancing Redox Reactions
Topic: Balancing (Acidic vs. Basic Balancing)
Replies: 3
Views: 431

Re: Balancing (Acidic vs. Basic Balancing)

Yes, I think that the question will specify whether the reaction is in a basic or acidic solution since the homework problems do.
by TramHo2G
Wed Feb 15, 2017 2:39 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: 14.85
Replies: 2
Views: 317

14.85

How can you tell which metal is more strongly reducing than the others from the list: Fe, Ag, Au, Zn, Cu, Ni, Co, Al?
by TramHo2G
Mon Feb 13, 2017 10:04 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Textbook Problem #14.27
Replies: 2
Views: 290

Textbook Problem #14.27

Using data from Appendix 2B, calculate the standard potential for the half-reaction U4^+(aq) + 4e- -> U(s)

Can someone explain how to do this problem?
by TramHo2G
Sun Feb 12, 2017 11:36 am
Forum: Balancing Redox Reactions
Topic: Midterm 2016 #6C
Replies: 1
Views: 489

Midterm 2016 #6C

The following redox reaction is used in acidic solution in the Breathalyzer test to determine the level of alcohol in the blood: H+(aq) + Cr2O7^2-(aq) + C2H5OH(aq) -> Cr^3+(aq) + C2H4O(aq) + H2O(l) Write and balance the reduction half-reaction. The answer is Cr2O7^2-(aq) + 14H^+(aq) + 6e- -> 2Cr^3+(...
by TramHo2G
Sat Feb 11, 2017 6:31 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7666
Views: 1036176

Re: Post All Chemistry Jokes Here

What's a cation afraid of?

A dogion.
by TramHo2G
Mon Jan 30, 2017 3:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 13847

Re: Quiz 1 Preparation Answers

For #12, what do I plug in for deltaS?
Is deltaH 2*(-824.2)?
by TramHo2G
Thu Jan 26, 2017 10:10 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Difference between bond enthalpies and standard enthalpies of formation
Replies: 1
Views: 241

Re: Difference between bond enthalpies and standard enthalpies of formation

Hi, Bond enthalpy(aka bond energy) is the amount of energy required to break one mole of the stated bond. For example, the bond energy of a O-H single bond is 463 kJ/mol. This means that it requires 463 kJ of energy to break one mole of O-H bonds. When all reactants and products are in their standar...
by TramHo2G
Thu Jan 26, 2017 9:40 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isothermal?
Replies: 2
Views: 372

Re: Isothermal?

Hi, In this link, https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=128&t=9661 Dr. Lavelle stated that an isothermal process is a change in a system where the temperature stays constant: ΔT = 0. He also defines other words such as isobaric or adiabatic. As for R, there are multiple values that...
by TramHo2G
Sun Jan 22, 2017 1:14 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7666
Views: 1036176

Re: Post All Chemistry Jokes Here

Q: Why did Carbon marry Hydrogen?
A: They bonded well from the minute they met
by TramHo2G
Sat Jan 14, 2017 4:03 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7666
Views: 1036176

Re: Post All Chemistry Jokes Here

What kind of dogs do chemists have?

Laboratory Retrievers.
by TramHo2G
Thu Dec 01, 2016 11:13 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configuration
Replies: 1
Views: 327

Electron Configuration

For Pb, where do you start counting to get n=4 for the f-block?
by TramHo2G
Thu Nov 24, 2016 9:49 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7666
Views: 1036176

Re: Post All Chemistry Jokes Here

Where does one put the dirty dishes after thanksgiving dinner?
In the zinc.
by TramHo2G
Tue Nov 15, 2016 8:56 pm
Forum: Naming
Topic: How to find the roman numeral when naming compounds [ENDORSED]
Replies: 4
Views: 2932

How to find the roman numeral when naming compounds [ENDORSED]

Hi, so I'm a bit rusty on naming compounds.
So for [FeCl3(H2O)3]-, the roman numeral would be (II).
I was wondering how to get that number?
by TramHo2G
Sat Nov 12, 2016 5:14 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7666
Views: 1036176

Re: Post All Chemistry Jokes Here

During christmas, I always put up my chemistree.
by TramHo2G
Tue Nov 01, 2016 8:37 pm
Forum: Hybridization
Topic: Fall 2014 Quiz 2 Prep #4
Replies: 2
Views: 294

Re: Fall 2014 Quiz 2 Prep #4

Thanks!
by TramHo2G
Tue Nov 01, 2016 8:12 pm
Forum: Hybridization
Topic: Fall 2014 Quiz 2 Prep #4
Replies: 2
Views: 294

Fall 2014 Quiz 2 Prep #4

Hello all,

For #4, the two possible chain structures for C3H4 was provided in the answers. However, the hybridization for each carbon atom was not. Can someone please tell me what the hybridization is so I can check my answers?
by TramHo2G
Mon Oct 24, 2016 10:43 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7666
Views: 1036176

Re: Post All Chemistry Jokes Here

A chemistry teacher was berating her students for not learning the Periodic Table of Elements.
She said, "Why when I was your age, I knew both their names and weights."
One kid popped up, "Yeah, but teacher, there were so few of them back then."
by TramHo2G
Tue Oct 18, 2016 2:08 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7666
Views: 1036176

Re: Post All Chemistry Jokes Here

Why did the white bear dissolve in water?

Because it was polar.
by TramHo2G
Wed Oct 12, 2016 3:23 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7666
Views: 1036176

Re: Post All Chemistry Jokes Here

How does copper say goodbye?
CU later!
by TramHo2G
Sun Oct 09, 2016 5:16 pm
Forum: Empirical & Molecular Formulas
Topic: Question on #9 from Quiz 1 Preparation Fall 2015 [ENDORSED]
Replies: 1
Views: 327

Question on #9 from Quiz 1 Preparation Fall 2015 [ENDORSED]

"Xylitol, a sugar substitute, has a mass composition of C 39.43%, O 52.58% H 7.88% and a molar mass of 152.15 g/mol. What is its molecular formula?" So I tried solving this problem and I got C5H10O5. The answer in the back, however, was C5H12O5. How do I go about to get the right answer? I...
by TramHo2G
Tue Oct 04, 2016 5:48 pm
Forum: DeBroglie Equation
Topic: Question on #9 from Quiz 1 Preparation in Workbook
Replies: 1
Views: 287

Question on #9 from Quiz 1 Preparation in Workbook

"Calculate the de Broglie wavelength of a 0.155 kg ball traveling at 85.0 m.s^-1" I tried to solve this problem using the wavelength=h/p equation. I did 6.626*10^-34 J.s / (.155 kg)(85.0 m.s^-1)= 3.63*10^-31 m The answer in the back was actually 5*10^-35 m. Can someone tell me what I did w...
by TramHo2G
Mon Sep 26, 2016 10:38 pm
Forum: Student Social/Study Group
Topic: Chemistry Jokes
Replies: 31
Views: 4418

Re: Chemistry Jokes

Q: Why are chemists great for solving problems?
A: They have all the solutions!

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