CHEMISTRY COMMUNITY

AnayaArnold_3L

TanveerDhaliwal3G wrote:What equations/concepts is deBroglie's equation derived from?

Just remember the equation lambda = h/p, where p=m(v) and it will give the equation wavelike properties.

AnayaArnold_3L

Elizabeth Harty 3A wrote:How do you know if there are sigma bonds available for rotation?

Sigma bonds can rotate,but pi bonds can't because of the p-shaped orbitals interlocking side by side.

AnayaArnold_3L

It's usually a partial positive.

AnayaArnold_3L

Should we only memorize transition metals and their charges?

AnayaArnold_3L

It all depends on what it is reacting with really, if it is in an acidic solution then it will be a base and the opposite is true if it is reacting with a basic solution

AnayaArnold_3L

What role do octet exceptions hod when it comes to identifying polarity?

AnayaArnold_3L

I'd say know how to identify biological compounds,but also review industrial ones just to be safe.

AnayaArnold_3L

How would we identify ligands?

AnayaArnold_3L

How many post should we have by the end of the quarter?

AnayaArnold_3L

radicals are only present when there is an odd number of electrons.

AnayaArnold_3L

The greater the molar mass the higher the boiling point, because there are more atoms present.

AnayaArnold_3L

You should also know that h-bonding only occurs when the hydrogen is directly attached to N,O,F.

AnayaArnold_3L

How can we guess which compound has a higher boiling point if we are only given the name?

AnayaArnold_3L

Should we only know how to identify dipole-dipole, induced dipole, and h-bonding?

AnayaArnold_3L

Do the periodic table trends have any effect on the boiling point?

AnayaArnold_3L

They vary in the number of electrons they supply.

AnayaArnold_3L

Does electronegativity play a role in the boiling point?

AnayaArnold_3L

a quick shortcut is the just see how many atoms are surrounding whichever molecule you are trying to find the formal charge for and then subtract the valence electrons from that value.

AnayaArnold_3L

Should we be using the electronic or molecular geometry name?

AnayaArnold_3L

Do lone pairs automatically make a molecule nonpolar?

AnayaArnold_3L

Are pi bonds weaker, because they stop the molecule from rotating and require a higher boiling point to be broken?

AnayaArnold_3L

Do we need to know how to identify intramolecular forces?

AnayaArnold_3L

How would we be able to identify if the problem requires the rydberg equation as soon as we read the problem?

AnayaArnold_3L

It will probably be a combination of both.

AnayaArnold_3L

Should we memorize all the names or just the root words for the coordinate compounds?

AnayaArnold_3L

Do we have to know both the Molecular and Electronic Geometry associated with the A-X-E notation?

AnayaArnold_3L

it usually involves the number of valence electrons available in either the d or p block.

AnayaArnold_3L

As long as you know the equations name and how to use it you should be fine!

AnayaArnold_3L

Probably everything starting after Focus 2D on outline 2 up until outline 4

Ben 1B wrote:Does anyone know what material will be covered on test number two?

AnayaArnold_3L

Thanks!!!!

RBergtraun_3A wrote:I had a similar question, this video helped me a lot. Hope it helps you. https://www.khanacademy.org/science/phy ... c-spectrum

AnayaArnold_3L

Thank you so much!

Cindy Adiwidjaja 1E wrote:Whenever you post something, there is a box on the right side of your post that has your information on it. Next to your name, there should be a number. By clicking that number, you can see all your posts, questions and replies, and can easily access all of your old work.

AnayaArnold_3L

Thank you

Mitchell Koss 4G wrote:Combustion is also unique in that it will always have some reactants and some products that remain the same. (CO2, H2O)

AnayaArnold_3L

It is measurable.

Nikita Patra 3J wrote:Is electronegativity measurable, or is it just seen as relative to other atoms?

AnayaArnold_3L

THANK YOU

KaleenaJezycki_4G wrote:The midterm will cover everything from the first 3 outlines. Review through 2D of the Chemical Bonds chapter, this will include Quantum and so on. Look on his website for the chapter outlines, it will really help understand what content will be covered.

AnayaArnold_3L

What are radicals?

AnayaArnold_3L

PLF's

Samantha Silva 1F wrote:Does anyone know of outside tutoring opportunities like a peer group?

AnayaArnold_3L

The valence electrons are the number of electrons you have.

aphung1G wrote:How do you determine which are the valence electrons after you write out your electron configuration?

AnayaArnold_3L

Yes, they are!

Lauren Sanchez 3D wrote:Just to make sure, the homework problems are now due during our actual discussions right?

AnayaArnold_3L

Thanks for clarifying!!

lukezhang2C wrote:For a Galvanic Cell it should be Anode || Cathode, where there are single lines (|) separating different states of matter, and commas separating different agents with the same state of matter. i.e (aq), (aq), || (aq)| (s)

AnayaArnold_3L

Hey! PLF's are still available and you don't always have to sin up sometimes you can just show up tot eh PLF!! Does anyone know if Peer Facilitated Learning is still available? I tried signing up through my portal, but it took me to my class planner making it seem like it was a class to put on my sc...

AnayaArnold_3L

Thank you for clarifying! I will discuss this in class tomorrow. AVERAGE RATE = (CONC(t2) − CONC(t1))/(t2 −t1) = ∆CONC/∆t INSTANTANEOUS RATE = −(d[R])/dt OR INSTANTANEOUS RATE = (d[P])/dt AVERAGE & INSTANTANEOUS RATES CAN BE DIFFERERENT FOR THE INDIVIDUAL R & P. THINK OF THEM AS THE EXPERIME...

AnayaArnold_3L

Thank you!

AnayaArnold_3L

Thank you so much!!!! Hey Chem 14A and 14B Students! I'm Ashley and I am a UCLA graduate and current NY medical student. Before medical school, I was Dr. Lavelle's UA for 10 quarters, which means I know how to do well and effectively study for this class. I wanted to give you some advice and things ...

AnayaArnold_3L

Hey guys!!

I just made this post to ask if anyone wanted to be study buddies? Especially since the Midterm is coming up in a matter of weeks :)

(Just reply to this post with your email or something you don't mind sharing)

AnayaArnold_3L

saigorijavolu33J wrote:these exceptions exist because a half-full or completely full d sub-level is more stable than the partially full one.

Can you break this down a bit further I'm having trouble understanding what you meant?

AnayaArnold_3L

Thank you so much!

AnayaArnold_3L

KHowe_1B wrote:What exactly is the Rydberg equation and how do you know when to use it?

From what I can tell you will mostly use it whenever frequency is involved in the problem.

AnayaArnold_3L

Just to add on-- Crash Course on Youtube is great for conceptual chemistry and overarching themes, and really helps with understanding the "greater picture" when it comes to some concepts. If you are looking for more step-by-step instruction with worked out examples, I'd highly recommend ...

AnayaArnold_3L

I know that a few students bought the e-textbook instead of the regular textbook. I'm interested in buying that one instead but I don't know which bundle on the Macmillan Learning student store includes the e-textbook. Do all of them include the e-textbook or only specific bundles? Loose-Leaf Versi...

AnayaArnold_3L

Lauren Lewis3L wrote:Does anyone know if we are allowed to do the quantum homework problems for this week's homework or are we moving on to the next section? I remember lavelle saying that we are finishing quantum on Monday.

We can still do the Quantum World homework problems.

AnayaArnold_3L

KHowe_1B wrote:What exactly is the Rydberg equation and how do you know when to use it?

You usually use igt in place of a constant when trying to calculate wavelength or frequency!

AnayaArnold_3L

The hydrogen atom has a radius of approximately 0.05 nm. Assume that we know the position of an electron to an accuracy of 1% of the hydrogen radius, calculate the uncertainty in the speed of the electron using the Heisenberg uncertainty principle. So the correct answer is Delta V >= 10^8 m/s. How ...

AnayaArnold_3L

Hey Chem 14A and 14B Students! I'm Ashley and I am a UCLA graduate and current NY medical student. Before medical school, I was Dr. Lavelle's UA for 10 quarters, which means I know how to do well and effectively study for this class. I wanted to give you some advice and things I wish I knew when I ...

AnayaArnold_3L

Guzman_1J wrote:What topics will the first test be covering?

Be sure to memorize the units as well!

AnayaArnold_3L

Thanks! I was sort of confused, so we’re allowed to solve problems from both fundamentals and quantum list. Hey, we are allowed to solve problems for both or just one or the other it all depends on if you feel as though you need more practice with the high school review module for the test next wee...

AnayaArnold_3L

BELTRAMI_4I Does anyone know of any good tutors for the first quarter of 2019 for Chem 14A? Hey! I 've found a few good tutors for the Fall Quarter of Chem 14A on the Chemistry and Biochemistry website where they post a list of tutors for the current quarter and they also update it every quarter! He...

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