Search found 35 matches

by 505578531
Sun Jan 10, 2021 11:16 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: States that affect K
Replies: 5
Views: 40

Re: States that affect K

Sondia Luong 1C wrote:Pure solids and liquids do not affect K because throughout the equilibrium, their concentrations will stay constant. Since their concentrations are constant, we don't need to account for them when calculating K.

Im sorry to be annoying but why do their concentrations stay constant?
by 505578531
Sun Jan 10, 2021 11:14 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sapling HW 1 #5
Replies: 8
Views: 70

Re: Sapling HW 1 #5

Thank you for asking I had this question as well, and would have gotten it wrong lol, my money was the second and third equation.
by 505578531
Sun Jan 10, 2021 11:12 pm
Forum: Administrative Questions and Class Announcements
Topic: Participation
Replies: 18
Views: 127

Participation

Im sorry if this has already been asked and I can not find it but do we get points for just posts or responses as well?
by 505578531
Sun Jan 10, 2021 11:08 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: States that effect equilibrium.
Replies: 4
Views: 41

Re: States that effect equilibrium.

Thank you for the response, but as a follow up question, why are solids and liquids not affected? I am not clear on that.
by 505578531
Sun Jan 10, 2021 11:04 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: States that effect equilibrium.
Replies: 4
Views: 41

States that effect equilibrium.

In an older lecture the professor that solids and liquids do not affect equilibrium, does this include aqueous solutions?
by 505578531
Wed Dec 16, 2020 11:41 pm
Forum: Air Pollution & Acid Rain
Topic: ocean acidification
Replies: 2
Views: 31

ocean acidification

Is the creation of acid rain similar to ocean acidification? like are they the same thing?
by 505578531
Wed Dec 16, 2020 11:39 pm
Forum: Lewis Acids & Bases
Topic: ph v. pka
Replies: 4
Views: 32

ph v. pka

Can someone explain the difference between ph and pka? I think I get it but I had a hard time with the hw so maybe I have something wrong
by 505578531
Wed Dec 16, 2020 11:37 pm
Forum: Lewis Acids & Bases
Topic: memorization
Replies: 2
Views: 28

memorization

I do not think I got the chance to memorize all strong acids, any tips on how to identify them?
by 505578531
Wed Dec 16, 2020 11:34 pm
Forum: Student Social/Study Group
Topic: Participation
Replies: 45
Views: 404

Re: Participation

Where are our participation points? I checked both ccle and ucla and I didn't see them
by 505578531
Wed Dec 16, 2020 11:33 pm
Forum: Student Social/Study Group
Topic: Final grading
Replies: 8
Views: 88

Re: Final grading

will the extra 10 points be applied though to our final or to the grade at the end?
by 505578531
Fri Dec 04, 2020 3:25 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Aqueous
Replies: 4
Views: 63

Re: Aqueous

Thank you sounds good.
by 505578531
Fri Dec 04, 2020 3:25 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Iron Naming
Replies: 3
Views: 29

Re: Iron Naming

Yes thank you very much.
by 505578531
Fri Dec 04, 2020 12:10 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Aqueous
Replies: 4
Views: 63

Aqueous

In a lecture the professor mentioned that it was aqueous because the reaction was a compound and water. It made me wonder if an aqueous solution is only that mixed in water or if it can be mixed with any liquid?
by 505578531
Fri Dec 04, 2020 12:08 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Iron Naming
Replies: 3
Views: 29

Iron Naming

Hi, I saw a coordination compound example with Iron and the name used the word "ferrate" and I wanted to know why and if something similar applied to any other TM?
by 505578531
Fri Nov 13, 2020 12:29 pm
Forum: Lewis Structures
Topic: Aqueous v Solid
Replies: 8
Views: 91

Re: Aqueous v Solid

Thank you!!!!
by 505578531
Thu Nov 12, 2020 6:39 pm
Forum: Lewis Structures
Topic: Aqueous v Solid
Replies: 8
Views: 91

Aqueous v Solid

Hi, so today in my discussion we had an example with NaCl and it called for us to draw the Lewis structure.
Someone asked if we were to assume it be aqueous or solid, and I do not know how would the structures would differ. Can someone please explain?
by 505578531
Thu Nov 12, 2020 12:54 pm
Forum: Bond Lengths & Energies
Topic: Interaction Potential Energy
Replies: 4
Views: 28

Re: Interaction Potential Energy

Ohhhhh. Thank you!
by 505578531
Wed Nov 11, 2020 10:03 pm
Forum: Bond Lengths & Energies
Topic: Interaction Potential Energy
Replies: 4
Views: 28

Interaction Potential Energy

Hi, I am just a bit confused on why the interaction potential energy is always negative? Even the equation has a negative sign.
by 505578531
Sun Nov 01, 2020 6:46 pm
Forum: Student Social/Study Group
Topic: Sappling week 2 problem #23
Replies: 1
Views: 40

Sappling week 2 problem #23

Can someone explain how we find the electron affinity?

context: The incident radiation had a wavelength of 1064 nm, and the ejected electrons were found to have an energy of 0.137 eV. It asks to find it in eV.
by 505578531
Sun Nov 01, 2020 6:44 pm
Forum: Student Social/Study Group
Topic: Sappling #26
Replies: 3
Views: 63

Sappling #26

how do we find the minimum uncertainty of velocity of an electron with just postion of 11Å?
by 505578531
Sun Nov 01, 2020 6:42 pm
Forum: Student Social/Study Group
Topic: Sappling #27
Replies: 3
Views: 54

Re: Sappling #27

thank you :)
by 505578531
Sun Nov 01, 2020 6:38 pm
Forum: Student Social/Study Group
Topic: Sappling #27
Replies: 3
Views: 54

Sappling #27

This problem is talking about Heisenbergs uncertainty principle. It asks to find the uncertainty of an electron's position and it tells it us that an 'electron moving at 3.00×106 m/s with an uncertainty of ΔV=0.01×106 m/s". Is the velocity relevant if we have the ΔV?
by 505578531
Sun Nov 01, 2020 6:22 pm
Forum: Student Social/Study Group
Topic: Sappling week 2-4 #22
Replies: 6
Views: 51

Re: Sappling week 2-4 #22

thank you for the help.
by 505578531
Sun Nov 01, 2020 6:13 pm
Forum: Student Social/Study Group
Topic: Sappling #25
Replies: 4
Views: 46

Sappling #25

the question asks us to find the energy E(photon) of the photon and the energy E(electron) of the electron with the following context, how do we do this? context: The E.coli bacterium is about 2.3 μm long. Suppose you want to study it using photons of that wavelength or electrons having that de Brog...
by 505578531
Sun Nov 01, 2020 6:06 pm
Forum: Student Social/Study Group
Topic: Sappling week 2-4 #22
Replies: 6
Views: 51

Sappling week 2-4 #22

"You use an electron microscope in which the matter wave associated with the electron beam has a wavelength of 0.0315
nm. What is the kinetic energy of an electron in the beam, expressed in electron volts?"

How would I do this problem?
by 505578531
Wed Oct 21, 2020 6:26 pm
Forum: Photoelectric Effect
Topic: Sappling week 2 problem #6
Replies: 5
Views: 63

Re: Sappling week 2 problem #6

thank youuuuu!!!!
by 505578531
Wed Oct 21, 2020 5:23 pm
Forum: Photoelectric Effect
Topic: Sappling week 2 problem #6
Replies: 5
Views: 63

Sappling week 2 problem #6

I am not sure what this problem is exactly asking and or how to tackle it. Can someone please help me? #6: "The electron in a hydrogen atom is excited to the n=6 shell and emits electromagnetic radiation when returning to lower energy levels. Determine the number of spectral lines that could ap...
by 505578531
Tue Oct 20, 2020 6:58 pm
Forum: Administrative Questions and Class Announcements
Topic: Accessing Sappling
Replies: 1
Views: 18

Accessing Sappling

Hi Ive been trying to get into sampling for a while now and Ive used the links on CCLE like I did in the past and it still tells me to log in through my "instructor's course on your University's learning management system." Does anybody know how to get in?
by 505578531
Sun Oct 18, 2020 9:59 pm
Forum: Administrative Questions and Class Announcements
Topic: formulas/equations
Replies: 2
Views: 22

formulas/equations

Are we supposed to memorize all the different types of formulas for test such as de Broglie's, Heisenberg's, Schrodinger's, etc. or will they be provided?
by 505578531
Sun Oct 18, 2020 9:55 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Logic behind it
Replies: 3
Views: 51

Logic behind it

In the module the worked out problems for the uncertainty were about the atomic model, but in regards to the answer it mentioned how with the equation we got a value that was more than the speed of light and that is why it was unlikely. Are we supposed to just use logical sense with these types of p...
by 505578531
Sun Oct 18, 2020 4:59 pm
Forum: General Science Questions
Topic: Sig Figs
Replies: 14
Views: 95

Sig Figs

I was just wondering how we should go about sig figs? (sorry if this was already asked and anwered I couldn't find it) Also are we penalized for incorrect use of sig figs?
by 505578531
Tue Oct 13, 2020 8:09 pm
Forum: Photoelectric Effect
Topic: Photoelectric effect post-test #34
Replies: 3
Views: 34

Re: Photoelectric effect post-test #34

thank youuuuuuu
by 505578531
Tue Oct 13, 2020 7:45 pm
Forum: Photoelectric Effect
Topic: Photoelectric effect post-test #34
Replies: 3
Views: 34

Photoelectric effect post-test #34

does anybody know how we should solve this?
question: If molybdenum is irradiated with 194 nm light, what is the maximum possible kinetic energy of the emitted electrons?
context:
threshold energy" 7.2158x10^-19J.
by 505578531
Tue Oct 13, 2020 7:28 pm
Forum: Photoelectric Effect
Topic: Photoelectric effect post-test #30
Replies: 4
Views: 71

Re: Photoelectric effect post-test #30

(I am responding to my own post btw) So I calculated the energy of the photon by reworking the equation mentioned above to find it was 4.491x10^-19J. I then used the equation E=v*H which led me to divide the energy by planks constant. I got an answer but would appreciate if someone told me if I did ...
by 505578531
Tue Oct 13, 2020 7:19 pm
Forum: Photoelectric Effect
Topic: Photoelectric effect post-test #30
Replies: 4
Views: 71

Photoelectric effect post-test #30

#30 asks us to find the frequency of the light hitting the sodium metal surface, I imagine we use the equation E(photon)-treshold energy = kinetic energy since we calculated those in the previous problems, but I am still unsure about what to do. context: Light hits a sodium metal surface and the vel...

Go to advanced search