CHEMISTRY COMMUNITY

TramHo2G

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?

TramHo2G

Are the highest priority groups in Professor Lavelle's example the chlorine and ether?

TramHo2G

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.

TramHo2G

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...

TramHo2G

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".

TramHo2G

If a queen farts, is it considered a noble gas?

TramHo2G

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?

TramHo2G

Are you a catalyst?
Cause you increase the rate of my heart.

TramHo2G

Yes, I think that the question will specify whether the reaction is in a basic or acidic solution since the homework problems do.

TramHo2G

How can you tell which metal is more strongly reducing than the others from the list: Fe, Ag, Au, Zn, Cu, Ni, Co, Al?

TramHo2G

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?

TramHo2G

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+(...

TramHo2G

What's a cation afraid of?

A dogion.

TramHo2G

For #12, what do I plug in for deltaS?
Is deltaH 2*(-824.2)?

TramHo2G

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...

TramHo2G

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...

TramHo2G

Q: Why did Carbon marry Hydrogen?
A: They bonded well from the minute they met

TramHo2G

What kind of dogs do chemists have?

Laboratory Retrievers.

TramHo2G

For Pb, where do you start counting to get n=4 for the f-block?

TramHo2G

Where does one put the dirty dishes after thanksgiving dinner?
In the zinc.

TramHo2G

Thank you! :)

TramHo2G

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?

TramHo2G

During christmas, I always put up my chemistree.

TramHo2G

Thanks!

TramHo2G

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?

TramHo2G

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."

TramHo2G

Why did the white bear dissolve in water?

Because it was polar.

TramHo2G

How does copper say goodbye?
CU later!

TramHo2G

"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...

TramHo2G

"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...

TramHo2G

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

CHEMISTRY COMMUNITY

Search found 31 matches

Newman Projection

Re: Priority of Ethers

Re: Final Exam Details and Review Sessions Winter 2017

2.21

Re: Cyclo-

Re: Post All Chemistry Jokes Here

Re: Quiz 2 Winter 2017

Re: Post All Chemistry Jokes Here

Re: Balancing (Acidic vs. Basic Balancing)

14.85

Textbook Problem #14.27

Midterm 2016 #6C

Re: Post All Chemistry Jokes Here

Re: Quiz 1 Preparation Answers

Re: Difference between bond enthalpies and standard enthalpies of formation

Re: Isothermal?

Re: Post All Chemistry Jokes Here

Re: Post All Chemistry Jokes Here

Electron Configuration

Re: Post All Chemistry Jokes Here

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

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

Re: Post All Chemistry Jokes Here

Re: Fall 2014 Quiz 2 Prep #4

Fall 2014 Quiz 2 Prep #4

Re: Post All Chemistry Jokes Here

Re: Post All Chemistry Jokes Here

Re: Post All Chemistry Jokes Here

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

Question on #9 from Quiz 1 Preparation in Workbook

Re: Chemistry Jokes