Search found 36 matches
- Wed Jun 13, 2018 6:58 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Orbitals
- Replies: 1
- Views: 353
Orbitals
This still confuses me. Can someone help explain on how to determine the orbitals. Thanks!
- Sat Jun 09, 2018 1:30 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligand shape
- Replies: 2
- Views: 371
Re: Ligand shape
I’m actually a little confused on these ligands myself. If someone could possibly help better explain it that would be great!
- Sat Jun 09, 2018 1:28 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Palladium
- Replies: 1
- Views: 338
Re: Palladium
This is because full d orbitals are much more stable than partially filled d orbitals. At such a high energy level electrons can jump from one orbital to another easily.
- Sat Jun 09, 2018 1:24 pm
- Forum: Hybridization
- Topic: Bond types
- Replies: 4
- Views: 648
Re: Bond types
Hydrogen bonds Polar covalent bonds Non polar covalent bonds Ionic bonds Hydrogen: it’s when an oxygen, nitrogen, or fluorine atom with a lone pair interacts with the hydrogen bonded to another nitrogen, oxygen, or fluorine atom. Polar covalent: a covalent bond where a pair of electrons are not equa...
- Sat Jun 09, 2018 1:18 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Award picture
- Replies: 1
- Views: 296
Award picture
Once again congratulations on being great! Be the worlds best female chemist and rep UCLA Alex!
- Mon Jun 04, 2018 11:42 am
- Forum: Lewis Structures
- Topic: Test Q.8 [ENDORSED]
- Replies: 7
- Views: 913
Re: Test Q.8 [ENDORSED]
Thanks everybody! that helps so much
- Mon Jun 04, 2018 11:40 am
- Forum: Bond Lengths & Energies
- Topic: Ionic Character
- Replies: 12
- Views: 15692
Ionic Character
I'd really appreciated it if someone could tell me how to determine ionic character.
For example,
which coumpound has greater ionic character...
NaBr or NaI
Thank you in advance.
For example,
which coumpound has greater ionic character...
NaBr or NaI
Thank you in advance.
- Sun Jun 03, 2018 12:16 pm
- Forum: Lewis Structures
- Topic: Test Q.8 [ENDORSED]
- Replies: 7
- Views: 913
Test Q.8 [ENDORSED]
Can someone please explain to me why the Lewis structure that is circled has the shorter boxed bond vs the one that is x ed out. Thank you!
- Thu May 24, 2018 10:11 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ion Centers
- Replies: 2
- Views: 230
Re: Ion Centers
Okay thank you Dr. Lavelle. Much appreciated.
- Thu May 24, 2018 7:42 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ion Centers
- Replies: 2
- Views: 230
Ion Centers
How do you find the distance between the center of ions?
- Thu May 24, 2018 7:13 pm
- Forum: Ionic & Covalent Bonds
- Topic: Configurations
- Replies: 1
- Views: 143
Configurations
Just wanting to make sure..
When we are given a problem such as....
Write the electron configurations of (a)the copper (I) ion and (b) the copper(II) ion does "copper (I)" signify that are asking for the configuration of Cu+? and "copper (II)" Cu2+?
Thanks!
When we are given a problem such as....
Write the electron configurations of (a)the copper (I) ion and (b) the copper(II) ion does "copper (I)" signify that are asking for the configuration of Cu+? and "copper (II)" Cu2+?
Thanks!
- Thu May 10, 2018 1:45 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Homework Question 2.41
- Replies: 3
- Views: 631
Homework Question 2.41
For part B) could someone help me with understanding why quantum number {5,0,-1,+1/2} is invalid?
Thanks!
Thanks!
- Wed May 09, 2018 4:41 pm
- Forum: Properties of Light
- Topic: Quiz 2 Question #6
- Replies: 2
- Views: 502
Re: Quiz 2 Question #6
Messed up on the decimal is what it was. Thank you!
- Wed May 09, 2018 3:21 pm
- Forum: Properties of Light
- Topic: Quiz 2 Question #6
- Replies: 2
- Views: 502
Quiz 2 Question #6
Hi so I was looking at the post that was similar to this one. But I still dont know how to convert my answers to nanometers. I got stuck on the second part. The question is: Radio stations use radio waves to send sounds through the air. Radio waves have a frequency of about 7 X10^6 Hz. Determine the...
- Sun May 06, 2018 12:35 pm
- Forum: Limiting Reactant Calculations
- Topic: Test #1 Q. 5
- Replies: 2
- Views: 452
Re: Test #1 Q. 5
Okay this makes a little more sense than what I was doing. Thank you
- Sun May 06, 2018 12:34 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Test 1 Q.1
- Replies: 3
- Views: 508
Re: Test 1 Q.1
Thank you so much this is very much appreciated!
- Sun May 06, 2018 11:55 am
- Forum: Limiting Reactant Calculations
- Topic: Test #1 Q. 5
- Replies: 2
- Views: 452
Test #1 Q. 5
Maltotriose C18H32O16, 504.437 g/mol is used in the body according to the following overall reaction: C18H32O16 (s) + 18 O2 (g) --> 18 CO2 (g) + 16 H2o (g) If you eat something containing 10.0 g of maltotriose, what mass of oxygen must you inhale for the maltotriose to react completely? What I did w...
- Sun May 06, 2018 11:42 am
- Forum: Molarity, Solutions, Dilutions
- Topic: Test 1 Q.1
- Replies: 3
- Views: 508
Test 1 Q.1
Anhydrous calcium chloride is a salt which is used increasing water hardness in swimming pools. A solution of CaCl2 is prepared by dissolving 4.00 g of salt to 1.00 L water. What is the concentration of chloride ions for the above solution? b) The above solution is diluted with 1.00 L of 0.400 M pot...
- Sat May 05, 2018 10:30 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Energy levels and Orbitals
- Replies: 3
- Views: 553
Re: Energy levels and Orbitals
The principal quantum number specifies the energy of an orbital in a one-electron atom. In such a scenario all orbitals with the same value of the principal quantum number, n, have the same energy and hence belong to the same shell of an atom.
- Sat May 05, 2018 10:17 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Nodes and Nodal Planes
- Replies: 1
- Views: 294
Re: Nodes and Nodal Planes
If you look in your book on page 39, the nodal plane is described to you as a divider between 2 lobes of the p-orbital. It cuts through the nucleus and here the probability of finding an electron is zero and where psi is equal to zero. These nodal planes serve as just that, a plane, a larger surface...
- Thu May 03, 2018 9:33 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Homework question 2.1
- Replies: 2
- Views: 262
Re: Homework question 2.1
It did! Thank you so much!
- Thu May 03, 2018 8:34 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Homework question 2.1
- Replies: 2
- Views: 262
Homework question 2.1
Can someone help explain what n and l represent in sense of this problem. I do know that the radius will increase and I do know that the energy of the electron will increase, but I can’t quite understand n and l. Thanks.
- Fri Apr 27, 2018 9:14 am
- Forum: Properties of Light
- Topic: Homework question 1.27 [ENDORSED]
- Replies: 3
- Views: 465
Homework question 1.27 [ENDORSED]
How would we calculate moles of photons in homework problem 1.27?
- Thu Apr 26, 2018 11:54 pm
- Forum: DeBroglie Equation
- Topic: Conversion [ENDORSED]
- Replies: 2
- Views: 386
Re: Conversion [ENDORSED]
Wait just kidding I saw my mistake that was made when doing the problem!
- Thu Apr 26, 2018 11:32 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect Module Question [ENDORSED]
- Replies: 5
- Views: 756
Re: Photoelectric Effect Module Question [ENDORSED]
I’m almost certain the answer to that would be UV, but I could be wrong. In Dr. Lavelle’s modules he explains it using UV. For sure visible light would not eject electrons.
- Thu Apr 26, 2018 11:27 pm
- Forum: DeBroglie Equation
- Topic: Conversion [ENDORSED]
- Replies: 2
- Views: 386
Conversion [ENDORSED]
How would you convert something like -4.09 x 10^-19 into nanometers?
- Sun Apr 22, 2018 9:57 pm
- Forum: Einstein Equation
- Topic: eV to Joules [ENDORSED]
- Replies: 1
- Views: 381
eV to Joules [ENDORSED]
How do i convert eV to joules?
- Sun Apr 22, 2018 9:51 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: ∆P and ∆X
- Replies: 5
- Views: 669
∆P and ∆X
I was very confused on when to use Delta P and Delta X. Can someone help explain that?
- Sun Apr 22, 2018 6:47 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect
- Replies: 12
- Views: 1146
Photoelectric Effect
When a photon hits a metal surface, an electron is only occasionally emitted. I forget, does the energy of the photon have to be greater than or equal to the energy of the electron in order for the electron to be emitted? Thanks.
- Sun Apr 15, 2018 10:27 pm
- Forum: Limiting Reactant Calculations
- Topic: Limiting Reactants
- Replies: 5
- Views: 585
Limiting Reactants
When determining the amounts in limiting reactants of a molecule, do we multiply 1 mole of that atom by the stoichiometric coefficient in the balanced equation? for example in CaC2 + 2 H2O -> Ca(OH)2 + C2H2 do we multiply the moles of CaC2 by 2 because of the 2 moles of hydrogen?
- Sun Apr 15, 2018 7:06 pm
- Forum: Limiting Reactant Calculations
- Topic: Reagent vs. Reactant [ENDORSED]
- Replies: 6
- Views: 1415
Re: Reagent vs. Reactant [ENDORSED]
I had the same problem and this is the link to where they answer it for me. Hope it helps!
viewtopic.php?f=13&t=30740
viewtopic.php?f=13&t=30740
- Sun Apr 15, 2018 7:03 pm
- Forum: Significant Figures
- Topic: Rounding: when and where?
- Replies: 10
- Views: 896
Re: Rounding: when and where?
When you're rounding you just have to stay constant. For instance, if I round my very first solution to the 3rd decimal place, round the rest of your solutions to the 3rd decimal place.
- Sun Apr 15, 2018 6:59 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Molarity
- Replies: 3
- Views: 220
Re: Molarity
Okay, this helps! Thank you!
- Sun Apr 15, 2018 6:58 pm
- Forum: Balancing Chemical Reactions
- Topic: Writing Products
- Replies: 2
- Views: 352
Writing Products
If we are told that a certain atom, for example, KCl combusts we obviously know. However, when we balance it out how do we write the product?
KCl + O2 =
A)KCl + O2
B)KClO2
or does it not matter?
KCl + O2 =
A)KCl + O2
B)KClO2
or does it not matter?
- Sun Apr 15, 2018 6:33 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Molarity
- Replies: 3
- Views: 220
Molarity
How do we solve for molarity when we are given the amount of a solute in grams and then adding even more water? For example... "A solution is prepared by dissolving 55.1 g of KCl in approximately 75 mL of water and then adding water to a final volume of 125 mL. What is the molarity of KCl(aq) i...
- Sun Apr 15, 2018 6:29 pm
- Forum: Limiting Reactant Calculations
- Topic: Reactants and reagents
- Replies: 2
- Views: 439
Reactants and reagents
I'm just a bit confused on what the difference between reactants and reagents are. Can someone help?