CHEMISTRY COMMUNITY

Kimberly Bauer 4E

Varadhan_3G wrote:Stereochemistry refers to the spatial arrangement of atoms. It involves isomerism--stereoisomerism, constitutional isomerism. If you would like I can send you a powerpoint I made on the subject! :)

Yes can you pls (:

Kimberly Bauer 4E

What is the difference between inorganic and organic bases?

Kimberly Bauer 4E

What does stereochemistry refer to?

Kimberly Bauer 4E

Which is a proton acceptor and which is the proton donor? I always forget it lol

Kimberly Bauer 4E

What does bond order refer to?

Kimberly Bauer 4E

What is the main difference between biological and industrial examples of coordination compounds and can you give an example of each?

Kimberly Bauer 4E

What does the ligand refer to?

Kimberly Bauer 4E

What are coordination numbers and what do they represent?

Kimberly Bauer 4E

205150314 wrote:
Kimberly Bauer 4E wrote:How many questions are on test 2 and what topics will be covered aside from polarity, IMFS, VSEPR, and Sigma and Pi bonds? Is it mostly conceptual compared to Test1 and the midterm?

sigma and pi bonds?

We learned about them today (11/18) in lecture (:

Kimberly Bauer 4E

How many questions are on test 2 and what topics will be covered aside from polarity, IMFS, VSEPR, and Sigma and Pi bonds? Is it mostly conceptual compared to Test1 and the midterm?

Kimberly Bauer 4E

Fiona Latifi 1B wrote:Dissociation energy refers to the amount of energy required to break down a molecule into singular atoms.

What does it refer to? Like the bond or the atoms in a molecule?

Kimberly Bauer 4E

How do you determine the energy of a bond?

Kimberly Bauer 4E

What does dissociation energy refer to?

Kimberly Bauer 4E

Is there a trend in the periodic table that gives polarizability? If not, how can we tell an atom has greater polarizability than another?

Kimberly Bauer 4E

What is the strongest to weakest bond?

Kimberly Bauer 4E

Can someone explain the dipole dipole bonds? I know there's more than one type of dipole bond can someone explain all of them?

Kimberly Bauer 4E

It just means to give the configuration for the outer most shell of electrons (valence electrons) as opposed to the entire electron configuration, in which you would start with 1s2 2s2 etc. Another way of thinking about it is that the valence electron configuration is the configuration from the las...

Kimberly Bauer 4E

Problem 1E.25 on the homework reads: Give the notation for the valence-shell configuration (including the outermost d-electrons) of (a) the alkali metals; (b) Group 15 elements; (c) Group 5 transition metals; (d) the “coinage” metals (Cu, Ag, Au). Does anyone know what they mean by "valence-she...

Kimberly Bauer 4E

Do we still have discussion even though the midterm is that night?

Kimberly Bauer 4E

How many orbitals can have the following quantum numbers in an atom:
(a)n=2,l=1
(b)n=4,l=2,ml=-2
(c)n=2
(d)n=3,l=2,ml=+1

Wouldn't it be noted by the quantum number l as that one tells us whether it's a s-, p-, d-, or f- orbital? The solutions manual says different.

Kimberly Bauer 4E

Molybdenum metal must absorb radiation with a minimum frequency of 1.09 x 1015 s-1 before it can emit an electron from its surface. Answer the following two questions.
A. What is the minimum energy needed to produce this effect?

How do I solve this problem?

Kimberly Bauer 4E

Rishika Yadav wrote:c = wavelength x frequency ==> c/wavelength = frequency
E = h x frequency ==> E = h x c/wavelength ==> E x wavelength = hc ==> wavelength = hc/E

OHHHH okay thank you LOL

Kimberly Bauer 4E

How do you combine the c= wavelength x frequency and the E=h x frequency to be wavelength = hc/E? I watched it in the module but I'm not certain I grasped how he combined both equations.

Kimberly Bauer 4E

tiffanyteguh1C wrote:It also helps to draw out the Aufbau structure of the highest energy orbital to visualize this.

What is an Aufbau structure?

Kimberly Bauer 4E

Are bond lengths and energies going to be on the midterm this Wednesday, November 6, 2019? If so, what is there to know about them?

Kimberly Bauer 4E

Are there any exceptions to the octet rule when drawing Lewis Structures? If so, what are they?

Kimberly Bauer 4E

Is there an equation we need to use with the photoelectric effect and if there is what do we use and when do we know when to use it (keywords etc.)?

Kimberly Bauer 4E

What does the DeBroglie equation look for and when do we use it (Like what does the problem asks for that requires the equation)?

Kimberly Bauer 4E

In my lecture notes, I have that N-O bond length in N03- =1.24 Angstroms and a C-C bond length is 1.39 Angstroms. Is this a standard measurement for all bonds between these elements?

Kimberly Bauer 4E

Can someone explain why a single bond is longer than a double bond and a triple bond?

Kimberly Bauer 4E

Just to be clear:
s- 1 ___
p- 3 ___ ___ ___
d- 5 ___ ___ ___ ___ ___ for orbital notation
and how many orbitals does f have and how do you find out?

Kimberly Bauer 4E

For example, S04^-2:
When finding the formal charge for this, do you use the formal charge equation for each- such as S by itself and one of the Os by itself?

Kimberly Bauer 4E

I have a question regarding whether it's a cation or anion. Does that affect the ionic radius of the element? In my notes, I wrote "cations are smaller than their parent atoms and anions are larger"

Kimberly Bauer 4E

Can someone explain this principle and provide examples?

Kimberly Bauer 4E

Within a shell the order is: s < p < d<f. Can someone explain this to me as I recall hearing that they all can't exist at the same time or there's limitations to it? Like s has to be 1 or p has to be 1

Kimberly Bauer 4E

When talking about these orbitals, what does it mean when it says the electron is in 2px state?

Kimberly Bauer 4E

In the equation (q1)(q2)/r, what are the q1 and q2 charges referring to?

Kimberly Bauer 4E

Can someone explain the difference between the principle, angular momentum, and magnetic quantum numbers?

Kimberly Bauer 4E

Can a photon ever NOT have enough energy to eject one e-, and if so what happens?

Kimberly Bauer 4E

Usually we won't be asked to remember that because the mass is extremely tiny but it is 9.10938356 x 10^-31 kg.

Kimberly Bauer 4E

When do we use the Bohr Frequency Condition and what is the background on it?

Kimberly Bauer 4E

Does one photon always interact with only one electron?

Kimberly Bauer 4E

What are blackbodies, what do they do, and when do we use the black body radiation equation?

Kimberly Bauer 4E

In a key concept we went over in class that states the above equations (relating to the Photoelectric Effect) illustrate the conservation of energy unless E (photon) is greater than or equal to E (energy remove e-) then e- is not emitted even for high intensity light. Can someone explain this and po...

Kimberly Bauer 4E

I notice we used 6.63 x 10^34 in an example in class when finding the wavelength, is there any other formulas I might need to use the equation for?

Kimberly Bauer 4E

When finding the empirical formula, after you divide by the smallest number you kind of have to use your best judgment to determine whether you have to multiply by a whole number or not, and in most cases you do. Considering 1.299, would you believe it to be close to 1, well not really since it is ...

Kimberly Bauer 4E

I'm doing Fundamentals F.11 letter B and I was dividing 31.91 K/30.0983 and it gave me 1.060. I found the rest of the calculations for the other elements and I ended up dividing each of the numbers by the smallest number which was 0.8160. I got 1.299 for K. When do I know when to multiply to find a ...

Kimberly Bauer 4E

Yes, you would assume that your sample is 100 g, but to convert to moles, you actually have to divide by the molar mass of each element as found on the periodic table (so 12.01 g/mol for C). You don't need to divide 63.15 by 100 because if you assume the sample is 100 g, then 63.15% of 100 would ju...

Kimberly Bauer 4E

Vanillin is found in vanilla extracted from Mexican orchids.A report on the analysis of vanillin listed the mass percentage com- position as 63.15% C, 5.30% H, and 31.55% O. In what atom ratios are the atoms present in vanillin? For this problem, I understand we're finding the empirical formula. All...

Kimberly Bauer 4E

I am aware different periodic tables give different amounts for the atomic mass. Is there a certain decimal place we should round to or should we put in the whole number for the atomic mass and in calculating molar mass?

Kimberly Bauer 4E

This homework problem reads: E.1 The field of nanotechnology offers some intriguing possibili- ties, such as the creation of fibers one atom wide. Suppose you were able to string together 1.00 mol Ag atoms, each of radius 144 pm, into one of these fibers by encapsulating them in carbon nanotubes. Ho...

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