CHEMISTRY COMMUNITY

Cienna Henry 1J

They are the highest points on the reaction profiles

Cienna Henry 1J

Catalysts can be in the overall rate law. See Lyndon's Pork Ramen review question 14f for an example

Cienna Henry 1J

According to the 2nd law, n a reversible process the total entropy of a system plus its surrounding is unchanged. delta Suniv = 0

Cienna Henry 1J

Something as simple as focusing on each breath slowly going in and out works wonders

Cienna Henry 1J

Matthew Casillas 1C wrote:Are we allowed to approximate below 10^-4 or 10^-3?

I think I heard 10^-3

Cienna Henry 1J

When can we use the approximation that allows us to bypass calculating a quadratic?

Cienna Henry 1J

Which problem exactly are you referring to?

Cienna Henry 1J

The study sessions are great, you'd probably find value in any of the ones you attend but I wouldn't rely solely on review sessions. You should also do homework problems and read the book to fully understand what is going on in class.

Cienna Henry 1J

What does the unique rate measure?

Cienna Henry 1J

Here's the link to the integration rules: https://lavelle.chem.ucla.edu/wp-conten ... _Rules.pdf

Cienna Henry 1J

Noah Cook 3O wrote:Generally hydrogen is not reduced or oxidized, but has a consistent oxidation state of +1. If it is a complex molecule that involves hydrogen, like H2SO4, it is usually another element within the molecule that is being reduced or oxidized.

Why is this?

Cienna Henry 1J

What's the point of adding platinum to the cell diagram?

Cienna Henry 1J

I'd look at all the topics listed on the syllabus under electrochemistry and go through them one by one to make sure you understand each (at least up to what we need to know for the test).

Cienna Henry 1J

What did one charged atom say to the other? I’ve got my ion you.

Cienna Henry 1J

the reaction is at equilibrium

Cienna Henry 1J

Based off of the time it took last quarter, we can expect them by next Friday the 22nd after lecture.

Cienna Henry 1J

It may help to think of heat as a reactant/product. For example, in an endothermic reaction, heat would be a "reactant" which means cooling would decrease the amount of reactants and therefore the formation of reactants would be favored.

Cienna Henry 1J

Have you tried reloading it?

Cienna Henry 1J

This was so adorable

Cienna Henry 1J

1 l atm = 101.33 J, this is on the formula sheet

Cienna Henry 1J

Yes but not all spontaneous reactions are exothermic.

Cienna Henry 1J

For two objects at different temperatures, the hotter one will lose heat to the cooler one until they attain thermal equilibrium - i.e they have the same temperature. Assuming there is no heat lost to the surroundings, the total energy lost by the hotter one is equal to the energy gained by the cool...

Cienna Henry 1J

Intensive property because it's defined as "heat required to raise the temperature of 1 mole of substance by 1 degree Celsius." and that doesn't change depending on the amount of substance there is because it is specifically referring to one mole.

Cienna Henry 1J

"Recall that electronegativity is the measure of an atom's attraction for electrons. The higher the electronegativity, the greater the attraction. We can extend this idea further and conclude that atoms with higher electronegativity will be less inclined to share their electrons with a proton. ...

Cienna Henry 1J

What problem are you referring to?

Cienna Henry 1J

Karyn Nguyen 1K wrote:What acids and bases (strong and weak) would be helpful to memorize?

Memorize all strong acids and bases (there aren't that many). Then you will know that all other acids/bases are weak.

Cienna Henry 1J

It is also important to note that Q can be equal to K. In this case, the reaction is at equilibrium.

Cienna Henry 1J

Compare their K values. The larger the value of Ka, the stronger the acid.

Cienna Henry 1J

No, pure solids and liquids are excluded in the calculation

Cienna Henry 1J

If you calculate Q and it is equal to K, the reaction is at equilibrium.

Cienna Henry 1J

Kc is the equilibrium constant in terms of concentration, Kp is the equilibrium constant in terms of pressure, and Q is the reaction quotient which can be equal to K.

Cienna Henry 1J

Yes you should memorize the strong acids so if you are asked to determine if an acid is strong or weak, you will know the answer based on if it's an acid you have memorized.

Cienna Henry 1J

How can you tell if a compound is amphoteric based on its Lewis structure?

Cienna Henry 1J

And why is oxalate named first when alphabetically it comes after aqua?

Cienna Henry 1J

What's the significance of the parentheses around diaqua?

Cienna Henry 1J

If we write H2O when OH2 is in the answer, is it wrong?

Cienna Henry 1J

An amphoteric compound can only act as an acid or a base at once, correct? It can't act as both at the same time right?

Cienna Henry 1J

2SP^3 is simply more specific than SP^3. They can mean the same thing.

Cienna Henry 1J

"State the relative orientations of each of the following hybrid orbitals" What is this question asking?

Cienna Henry 1J

What is the s-character of a hybrid orbital and why does it increasing cause the bond angle to increase?

Cienna Henry 1J

Why might option b have lone pairs? Wouldn't it look like option a if it had lone pairs?

Cienna Henry 1J

RoopshaChatterjee 1G wrote:How do we use the attractive energy to determine the structure of the molecule?

Are you sure attractive energy matters when determining the structure of a molecule?

Cienna Henry 1J

KarlaArevalo4D wrote:I think we might (should) get like the general shapes and structures on the formula sheet, at least that is what a past chem prof. gave us not to sure

The formula sheet is posted online and doesn't have any of the shapes on it

Cienna Henry 1J

But what exactly does it mean to contribute to a resonance structure?

Cienna Henry 1J

What does the attractive energy measure?

Cienna Henry 1J

London dispersion forces are a type of Van der Waal’s forces. These forces always operate in any substance. In general, the heavier the molecule, the stronger the Van der Waal's force of interaction. So the two terms aren't completely synonymous? A London dispersion force is a type of van de waal's...

Cienna Henry 1J

Do we have to memorize the shapes or is there a method we can follow to draw the structure?

Cienna Henry 1J

"Write the most likely charge for the ions formed by each of the following elements (a) S; (b) Te; (c) Rb; (d) Ga." How is this determined?

Cienna Henry 1J

Will we be tested on Kekule structures?

Cienna Henry 1J

Kunseo Yook 2E wrote:Are there going to be review sessions for the midterm?

Yes the review sessions have been emailed to us

Cienna Henry 1J

Will the step up sessions, workshops, and drop in sessions still happen at their normal times or have they been replaced by the midterm review sessions?

Cienna Henry 1J

Why can't the subshell 2d exist in an atom?

Cienna Henry 1J

Is this the equation Lavelle told us to steer away from using because students usually make mistakes?

Cienna Henry 1J

Do you know how many significant figures we should use when solving problems, or should we just match the given information? They are given on the exams but it might be helpful to familiarize yourself with some of the more frequently used constants just as a time saving technique. Match the given i...

Cienna Henry 1J

Yes, it's used to cancel units

Cienna Henry 1J

Does that mean they're due by Friday at 11:59pm?

Cienna Henry 1J

What do the ns signify in this equation?

Cienna Henry 1J

Why are these important? What are they?

Cienna Henry 1J

Max Kwon 1J wrote:Wait, so do you have to make 3 posts a week or are 3 replies fine?

I believe replies count as posts.

Cienna Henry 1J

In the solutions manual, the answer for question E1 from the homework was converted to kilometers. What wording in the question hints that I am supposed to convert units?

Cienna Henry 1J

sallina_yehdego wrote:Quick Question: Are we supposed to write down the questions for the textbook problems when doing the homework??

I don't remember anyone saying we had to write the question down.

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