CHEMISTRY COMMUNITY

hafsa_zulfiqar_1j

They're not interchangeable. Iso- refers to the C-C single bond connectivity in the structural pattern and dimethyl- means that there are two methyl groups attached to the molecule. IF you look on page 9 of the Introduction to Organic Chemistry course reader, you'll see an example of this in play in...

hafsa_zulfiqar_1j

Quiz 3 will also include electrophillic addition, in addition to sN2 mechanisms.

hafsa_zulfiqar_1j

I'm pretty sure the third quiz will focus on the new organic chemistry material, since the focus of quiz 2 was kinetics. I wouldn't rule it out being on the final though, so just be comfortable with the material in case it does show up on the final.

hafsa_zulfiqar_1j

Yeah for the purposes and intent of this class the green course reader is the same as the "O-chem textbook" I believe.

hafsa_zulfiqar_1j

hafsa_zulfiqar_1j

So, for step 1, the problem is stating that there is constant volume. This means delta V is equal to 0 so work is equal to 0. Therefore the change in internal energy is equal to heat gain/loss. Since the system absorbs heat, q= +50.0 J and delta U = +50.0 J. In step 2, there is a return to the origi...

hafsa_zulfiqar_1j

hafsa_zulfiqar_1j

A group of organic molecules were having a party, when a group of robbers broke into the room and stole all of the guest's joules. A tall, strong man, armed with a machine gun came into the room and killed the robbers one by one. The guests were very grateful to this man, and they wanted to know who...

hafsa_zulfiqar_1j

Oh wait, sorry follow up: correction. For process 3, I explained incorrectly. Because the system is under a constant pressure, raising the temperature would lead to greater thermal motion and greater disorder and thus an increase in entropy. I apologize for the confusion, I misread the question.

hafsa_zulfiqar_1j

So for question 7: first recall that entropy is a measure of disorder, so the more positions there are for atoms and molecules to move in the more disorder there is, which means a higher entropy. Part 1 says that the pressure of 1 mole of gas is allowed to double isothermally. Pressure and volume ar...

hafsa_zulfiqar_1j

We still have quizzes this quarter yes, but the ones in the course reader are for practice only. Our actual quiz will be in class during section and our TA will hand us a printed copy of the quiz, just like they did in 14A, and we will have 40 minutes to take the quiz. That quiz will then be graded,...

hafsa_zulfiqar_1j

All the practice quizzes are in the course reader, but they're all for practice and to help us prepare for our quizzes in discussion section. We aren't going to be turning in any practice quizzes for a grade (like we did in 14A).

hafsa_zulfiqar_1j

At the stoichiometric point, the moles of acid is equal to moles of base.

hafsa_zulfiqar_1j

The reason is becasue only aqueous or gas phase reactants and products are included in the equilibrium constant

hafsa_zulfiqar_1j

Did you know Oxygen went for a second date with Potassium?

How did it go?

It went OK2.

hafsa_zulfiqar_1j

Want to hear a joke about sodium?
Na.

hafsa_zulfiqar_1j

It depends, if two classes from a series are co-requisites then they can be taken at the same time--like Chem 14b and bl. If you click on the course name, for instance, in your course planner, it will give you details and tell you requisites and co-requisites for a specific course.

hafsa_zulfiqar_1j

What show do Cesium and Iodine like watching together?

CSI

hafsa_zulfiqar_1j

When comparing moles of reactant with moles of another reactant, you refer to the balanced chemical equation to find the mole of reactant:mole of reactant ratio. For comparing moles reactant to moles product, the only difference is you refer to the product instead of the reactant. For example in the...

hafsa_zulfiqar_1j

Cations are smaller than their parent atoms because when they lose electron(s) the pull of the nucleus on the remaining electrons becomes stronger and 'draws in' the remaining electrons leading to cations being smaller than their parent atoms. Likewise, anions are larger than their parent atoms beca...

hafsa_zulfiqar_1j

Q: Why do chemists like nitrates so much?
A: They're cheaper than day rates.

hafsa_zulfiqar_1j

These types of problems sometimes depend on what values you use for constants. For example, if you use 2.998 X10^8 m/s for speed of light versus 3.000X10^8 m/s your answer might not be 100% the same both times. The same goes for Rydberg's constant, Planck's constant, etc. I feel like there may be a ...

hafsa_zulfiqar_1j

I would recommend calling the course reader store in Westwood and asking them about it.

hafsa_zulfiqar_1j

The course reader also has info on pages 26 and 27 about sig figs and Dr. Lavelle's website also has a link about sig figs on it.

hafsa_zulfiqar_1j

-The Balmer series is in the visible light area of the spectrum and its wavelengths are typically longer than 400 nm but shorter than 700 nm. Furthermore, the Balmer series lowest energy level is at n=2. -The Lyman series however lies in the ultraviolet region of the spectrum with its wavelengths ly...

hafsa_zulfiqar_1j

I think setting up a GroupMe or a mass email with everyone who wants to study together is a good idea. My schedule varies but I should be free after 6 pm most days though.

hafsa_zulfiqar_1j

I'd like to join the study group. I live in Rieber Hall as well.

CHEMISTRY COMMUNITY

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