CHEMISTRY COMMUNITY

Emily_Lenh2A

I'm still very confused by pre-equilibrium; how do we know when to use it(for example, if it were given on the final, in what way would it be worded or what specific words should we look for as cues to use it)?

Emily_Lenh2A

Because this is an endothermic reaction, as can be seen through the activation energies of the forward and reverse reactions, the forward reaction will take in energy/heat and the reverse reaction will release energy/heat. When you raise the temperature of the system, it tries to go back to equilibr...

Emily_Lenh2A

3,3-dimethylpentane isn't included as an answer because it has 7 carbons, not 6. I believe that cyclic compounds could be considered (I googled it and found this: https://www2.chemistry.msu.edu/faculty/reusch/virttxtjml/sterisom.htm ; it seems to have considered a cyclic compound as a constitutional...

Emily_Lenh2A

I'm not quite sure of this either but I think the cycloalkane as a substituent would have the same priority as other common alkyl groups (like methyl, ethyl, and so on). I couldn't find an exact answer in the textbook, so I googled it and found this: https://www.angelo.edu/faculty/kboudrea/organic/I...

Emily_Lenh2A

I'm not quite sure how to go about answering this question without being given the values for the reduction potentials. I looked at previous answers for this question, but I'm still confused. In the course reader, we aren't given the reduction potentials, but some of the previous answers have said t...

Emily_Lenh2A

I was very confused by this as well. After searching up methylhexdiene on Google, the only results are for methyl (or dimethyl) hexadiene. There seems to be no methylhexdiene (without the "a"). Even when searching up "hexdiene", the only results are for "hexadiene". I w...

Emily_Lenh2A

I think that you can email him about it too (I heard from one of the upperclassmen I know), but I don't know specifically in what manner or when. His email is on his class website.

Emily_Lenh2A

Is it possible that we will get marked down if we put it out of order when they are separated by the single vertical line? For example, if we put the solids at the end (correctly) but put the rest out of order (such as those that are gas, liquid, or aq)?

Emily_Lenh2A

You're supposed to use the first reaction described in order to find the heat capacity of the calorimeter (divide 3.50 kJ by 7.32 C). Using q system = -q surroundings , you can find the change in internal energy of the neutralization reaction by having the change in internal energy equal to q system...

Emily_Lenh2A

I believe the reason they say that only 1/4 of the energy will be released is because the enthalpy of the reaction is for 4 moles of TNT, and they want to find how much energy is released with only 1 mole of TNT. That way, you can use it more easily to find the enthalpy released per liter, which is ...

Emily_Lenh2A

Can you please specify which examples in the course reader you are referencing? I'm a bit confused by what you're asking and it might help me (and others) understand what you're asking.

Emily_Lenh2A

I believe that we should still follow the rule in which we round at the end instead of rounding after every step, since that's what they told us to do before on the quizzes and midterm. I think that the practice midterm had rounded after every step as well, but I generally disregarded that and did w...

Emily_Lenh2A

When I was planning my classes with my counselor for the next quarter, she initially didn't include 14BL with 14B, but when I asked her about it, she said that I definitely could take it together. I think that most people don't take it together but you could if you wanted to. However, as someone els...

Emily_Lenh2A

All material covered in Fundamentals and Chapters 1-4 up to the end of hybridization. Course Reader: All material up to page 105. Past Midterms in Course Reader: Pages 179-217 For more info go to this link: https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=157&t=16342 Will it cover material t...

Emily_Lenh2A

On Lavelle's website, he pointed out and posted errors from the solution manual. Problem 2.93 happens to be one of the questions that have an error in the solution manual. Here is the link: https://lavelle.chem.ucla.edu/wp-content/supporting-files/Chem14A/Solution_Manual_Errors_6Ed.pdf Hope this hel...

Emily_Lenh2A

Naming compounds was covered in the very beginning of the course reader, so I'm expecting that we should know the simple rules that were outlined there. Besides, even if we aren't going to be quizzed on it, I feel that it would be helpful to know it anyways.

Emily_Lenh2A

In the textbook (for the 6th edition), you can find a bit about valence electron configurations specifically on page 46 (it's on page 35 for the 5th edition). As for whether we will be tested on what we may not have gone over explicitly in lecture, I believe that he will be testing us on what the sy...

CHEMISTRY COMMUNITY

Search found 17 matches

Re: pre equilibrium

Re: Homework 15.65 part C

Re: Final 2013 Question 7

Re: Cycloalkanes as substituents

Re: Question 3A of Winter 2014 Practice Final

Re: naming alkenes

Re: 14C

Re: Cell Diagram

Re: HW Ch. 8 #25

Re: Homework Problem 8.51

Re: Change in molarity

Re: Significant Figures in Equilibrium calculations

Re: Chem 14B and 14BL [ENDORSED]

Re: Midterm

Re: QUESTION ABOUT IONIC AND ATOMIC RADII

Re: Naming for Quiz 2

Re: Valence Electron Configuration