CHEMISTRY COMMUNITY

Simran Bains 2C

I was wondering if anyone knew when we would be getting the results of our finals.

Simran Bains 2C

I thought of it like the diagram that we would draw, where deltaH is the difference in Reactants and Products, and then the activation energy is essentially how high up it goes from the reactants side. So I believe that the reverse activation energy would be just adding up the two.

Simran Bains 2C

Midnight of the day of the final.

Simran Bains 2C

I believe that it's because it has the same substance on both sides.

Simran Bains 2C

Ive seen posts from many years ago, so I'm sure that they will remain up.

Simran Bains 2C

I was going over Galvanic cells and wondering when do we need to include an inert electrode, like in problem 6K.5.

Simran Bains 2C

my main advice would be to just remember to always spend some time doing what you love.

Simran Bains 2C

Dr. Lavelle sent an email with info on a lot of review sessions this week.

Simran Bains 2C

I just realized that time will be moving forward one hour the morning of the final, so just a reminder for everyone that the final will take place right after time changes.

Simran Bains 2C

make sure to attend all of the review sessions and do all of the textbook questions.

Simran Bains 2C

gaming, anime, and sleep

Simran Bains 2C

I'm more on the side of Paradise Island and Mikasa and Armin.

Simran Bains 2C

Highly recommend the artist Aries for anybody who hasn't listened to him. He's my favorite artist and everything he releases is a banger, trust me check him out.

Simran Bains 2C

I believe that its simply a constant.

Simran Bains 2C

Yea we are still allowed to post on chemistry community even after reaching our 50 posts.

Simran Bains 2C

E naught is E under standard conditions, just as deltaG naught is deltaG under standard conditions.

Simran Bains 2C

Alright, thanks!!

Simran Bains 2C

I just wanted to make a fun little thread where AOT fans can just discuss the new episodes that release. For the people that are caught up are you guys, who's side are you on? Yeagerists, Marleys, or Paradise Islands? (Also if you are caught up with the manga, please try to not spoil anything for th...

Simran Bains 2C

I was wondering if anybody knew when the final is going to be.

Simran Bains 2C

It is talking about the number of moles of electrons that are transferred.

Simran Bains 2C

I have been stuck with number 5 and how to balance MnO−4(aq)+S2−(aq)⟶S(s)+MnO2(s). Any assistance would be great

Simran Bains 2C

I would recommend going to all of the step up sessions and all the workshops as well as doing all the textbook problems.

Simran Bains 2C

Just try restarting sapling, it was glitching for me for a while.

Simran Bains 2C

I have been on this problem for a while and I just can't figure it out. Can anyone help me out.

Simran Bains 2C

Delta G naught is at standard conditions, whereas Delta G isn't at standard conditions necessarily.

Simran Bains 2C

I was having the same trouble with the final back in 14a. I would say to try to do as many workshops as you can and do those practice questions.

Simran Bains 2C

If Q is less than K, then it would proceed in the forward direction, but if Q is larger than K, then it would proceed in the reverse direction.

Simran Bains 2C

I find the best way to think of a state property is like the example that we were given for climbing a mountain. No matter what path someone takes, when the reach the top, the altitude is the same so in that case the altitude is a state property, however, the distance traveled could be different for...

Simran Bains 2C

I just wanted to start this as a place for people to just put all of the equations that we need to know for thermodynamic and thermochemistry for the second midterm. I feel like having all the equations in one place would really help out.

Simran Bains 2C

If anybody is into anime, right now I am watching the final season of attack on titan and I am also watching tokyo ghoul for the first time, both are good.

Simran Bains 2C

For 14a in this class, I thought the final was a lot harder than the midterms. I did well on the midterms, but I wasn't happy with my final results. But this is just my opinion.

Simran Bains 2C

Just make sure to spend your free time on stuff that you really enjoy instead of just wasting time, so that way you can have more fun and waste less time.

Simran Bains 2C

ΔG⁰ just means everything is in its standard state, whereas with ΔG not everything needs to be in standard state.

Simran Bains 2C

qrev is used specifically for a reversible reaction I believe

Simran Bains 2C

Okay, thanks!

Simran Bains 2C

If we are given pressure in torr, we use 8.314, if we are given pressure in atm, we use 0.08206.

Simran Bains 2C

I was wondering if anyone knew when the next midterm is.

Simran Bains 2C

Reading this made me feel so much better. Thanks!!!

Simran Bains 2C

Yes, I believe so.

Simran Bains 2C

when k is equal to or smaller than 1.0x10^-5

Simran Bains 2C

Yea, we join off of a second device, a phone or a tablet or something like that.

Simran Bains 2C

In this question, it says to use table 5G.2 for the question, so I used the value "6.1x10^23" and used 1/6.1x10^23 to calculate Kc, but in the solutions, the value "6.1x10^3" was used. Is this just a mistake in the solutions, or am I missing something.

Simran Bains 2C

For this question, I am unsure on how to get the balanced equation for part a, I get how to do part b, but I'm just not sure on how to get the balanced reaction. I get why there is 1 mol of B and 2 mol of C, but how do we obtain the information that there are 2 mol of A, is it just because the line ...

Simran Bains 2C

I got the right answer and I get how to get it but I was wondering why for this question the concentration of HI was given as "(HI)" and not "[HI]". They used parentheses instead of brackets and I was just wondering why.

Simran Bains 2C

If it is a gas, we would include it.

Simran Bains 2C

The only way that I know how to do it is just to memorize the tables from 6C.1 and 6C.2

Simran Bains 2C

I have been setting aside about 2 hours every day in order to study for chem, I feel like that is the best approach so you don't have to cram as much before the midterm or final. Reading the textbook really helps too.

Simran Bains 2C

Yea I believe we can use calculators for the exams.

Simran Bains 2C

It should be less than 15 questions for sure since we only have 50 min to take it.

Simran Bains 2C

This is a show and not a movie, but Phineas and Ferb is always a vibe.

Simran Bains 2C

Q is the reaction quotient, whereas K is the reaction quotient at equilibrium specifically.

Simran Bains 2C

It depends on which side of the equilibrium the reaction is. Say Q is greater than K, that means that there is more products than reactants, so the products would be -x and reactants would be +x to get back to equilibrium. And if Q is less than K it is the other way around.

Simran Bains 2C

I was confused on this problem because I tried plugging in x for the answer, but I didn't see that we had to use x to calculate the final pressure for all of the gasses and then add the total pressures up.

Simran Bains 2C

I had trouble on this one for a while because I didn't multiply my x by 2 at the end, so remember to do that.

Simran Bains 2C

Using pv=nrt, it is easy to convert Kp to Kc.

Simran Bains 2C

I believe that it is stated in the syllabus that for 14b the midterms will be during lecture instead of discussion.

Simran Bains 2C

Yes, I do believe that enthalpy determines whether a reaction is endothermic or exothermic.

Simran Bains 2C

If it is favoring the right at equilibrium that means that there is more products than reactants, and if it favors the left, then there are more reactants than products at equilibrium.

Simran Bains 2C

I think the biggest thing to help is to just sit down and designate a certain amount of time every day to study and read the textbook instead of cramming before the midterms.

Simran Bains 2C

From what we have learned so far I believe temperature is the only thing that changes K.

Simran Bains 2C

Seesaw its a trigonal by pyramidal shape with one lone pair, while trigonal pyramidal is a tetrahedral with one lone pair.

Simran Bains 2C

The two single bonded Oxygen.

Simran Bains 2C

In fundamentals J, it says the the net ionic equation for HCN with NaOH is HCN(aq) + OH-(aq) → H2O(l) + CN-. My question is why isn't the HCN not split up into H+ and CN- in the beginning so that they can cancel out in the net ionic equation.

Simran Bains 2C

Okay, thanks.

Simran Bains 2C

Were the topics that were covered in 2F part of midterm number 2? Or did we do that afterwards.

Simran Bains 2C

Valence electrons are the number of electrons in the outer orbital. The number of electrons in orbitals go 2, and then 8 from there on. So, if you take P, with 15 electrons, you subtract 2, which gives you 13, then subtract 8, which gives you 5. That's how many valence electrons P has.

Simran Bains 2C

It should be dichlorvos and the cobalt should be (III)

Simran Bains 2C

It is just the number of ligand bonds that are bonded to the metal I believe.

Simran Bains 2C

From what we have learned I believe c is always the speed of light.

Simran Bains 2C

It is on his Chem 14a website.

Simran Bains 2C

I believe it is from about 0.5 to 1.6.

Simran Bains 2C

A single, double, and triple bond all count as a single region of electron density, as well as lone pairs.

Simran Bains 2C

It is due to the electronegativity of the carbon and hydrogen being very similar.

Simran Bains 2C

I would say to start with the valence electrons and then put the least electronegative atom in the center. Then orient the other atoms around and base the bonds on the charge of each atom.

Simran Bains 2C

A single bond is a sigma bond and then any bond after that is a pi bond. For example, with a double bond, there is one sigma bond and one pi bond. A triple bond has one sigma bond and two pi bonds.

Simran Bains 2C

Yes, London dispersion forces are found in all molecules.

Simran Bains 2C

I was wondering if anybody had an idea of when the results of midterm 2 would be out. Is it going to take the same amount of time as the first midterm?

Simran Bains 2C

Okay, thanks!!!

Simran Bains 2C

I just had a question on why PCl3 doesn't have a double bond on one of the P to Cl interactions.

Simran Bains 2C

Thanks y'all!!!

Simran Bains 2C

What are the topics that are going to be tested on midterm #2?

Simran Bains 2C

Okay, thanks!!!

Simran Bains 2C

I was just wondering if anyone knew when the results for the midterms will be out.

Simran Bains 2C

Thank you guys so much!!!!!

Simran Bains 2C

Hello everyone, I was wondering what the difference is between the equation En=-hR/n^2 and the equation v(frequency)=R[1/n1^2-1/n2^2]. If someone can explain this in good detail that would be awesome. Thank you. :)

Simran Bains 2C

I was just wondering if he gave us the number of questions that will be on the final, or is it just going to be a surprise.

Simran Bains 2C

Do we do all of the textbook questions in the textbook for 1D for the midterm?

Simran Bains 2C

I just had a quick question about what question in the textbook the midterm will cover?

Simran Bains 2C

Do you know what section we could learn about the strong bases, strong acids and the polyatomic ions?

Simran Bains 2C

I just had a quick question that came up when I was reviewing for the midterm. I was going over the fundamentals and I was wondering if we would have to know the formula for a molecule just based on the name. For example, for F3, it says to write the formula for nitric acid. Do we need to know this ...

Simran Bains 2C

(wavelength)=h/p
p=(mass)(velocity)
(wavelength)=h/(mass)(velocity)

Simran Bains 2C

If we are doing something that involves joules then we should use kilograms and we don't have to memorize any of the masses as they will be provided to us.

Simran Bains 2C

The intensity has to do with the amount of photons that are in the beam of lights, whereas the frequency of the light is the amount of times that the wave repeats every second.

Simran Bains 2C

The n1 refers to the final energy level and n2 is the initial energy level.

Simran Bains 2C

I don't think we have to show any work at all if we don't need to as the test is multiple choice.

Simran Bains 2C

Alright thanks to everyone that replied. It makes it a lot easier to not have to memorize all of the constants.

Simran Bains 2C

I had a question concerning all of the constants and equations when it comes to the midterms. Will all of them be provided to us or will there be certain ones provided and the others we have to memorize? Or will we not be given any of them?

Simran Bains 2C

Energy is measured in Joules. Just remember that Joules can also be measured as kg*(m^2/s^2).

Simran Bains 2C

Degrees isn't used with Kelvin.

Simran Bains 2C

I don't believe that he has explained the actual reasoning behind why there is a difference in the energy difference between the different levels and I don't think we will be tested on it either.

Search found 109 matches