Search found 30 matches
- Thu Jun 14, 2018 1:53 am
- Forum: Empirical & Molecular Formulas
- Topic: Midterm Q3
- Replies: 3
- Views: 605
Re: Midterm Q3
But in other problems there have been compounds that included oxygen in the empirical formula so how can we assume that O2 is the only thing that contributes to all the oxygen?
- Wed Jun 13, 2018 5:52 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination Number
- Replies: 2
- Views: 395
Coordination Number
Is a coordination number the same thing as the # of ligands bound to an atom?
- Wed Jun 13, 2018 4:50 pm
- Forum: Empirical & Molecular Formulas
- Topic: Midterm Q3
- Replies: 3
- Views: 605
Midterm Q3
For this question how are we supposed to know that oxygen isn't in the empirical formula of nicotine?
- Wed Jun 13, 2018 3:51 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Oxidation Number
- Replies: 1
- Views: 421
Oxidation Number
Are oxidation number and ionic charge the same? Like is the charge of an anion the same thing as its oxidation number?
- Wed Jun 13, 2018 3:48 pm
- Forum: Resonance Structures
- Topic: Radicals
- Replies: 1
- Views: 364
Radicals
Where do you place the extra electron in a radical? Does it always go on the central atom?
- Wed Jun 13, 2018 3:28 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Transition Metal Valence Electrons
- Replies: 3
- Views: 511
Re: Transition Metal Valence Electrons
By this same logic, how many valence electrons would copper? can someone explain please
- Wed Jun 13, 2018 3:27 pm
- Forum: Dipole Moments
- Topic: london forces
- Replies: 7
- Views: 865
Re: london forces
Yes all substances have London forces, because all molecules have the possibility of having dipole moments which I think are the same thing as London dispersion forces.
- Wed Jun 13, 2018 3:24 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Midterm 1 Q!C
- Replies: 2
- Views: 497
Re: Midterm 1 Q!C
It does thank you so much!
- Wed Jun 13, 2018 12:09 pm
- Forum: DeBroglie Equation
- Topic: Test 2, #5
- Replies: 1
- Views: 316
Re: Test 2, #5
Oops #6, not 5
- Wed Jun 13, 2018 12:08 pm
- Forum: DeBroglie Equation
- Topic: Test 2, #5
- Replies: 1
- Views: 316
Test 2, #5
Does anyone know what the correct answer for #5 on test 2 is? I'm trying to review but I'm not sure if there is a key for the past tests?
- Wed Jun 13, 2018 11:10 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligands
- Replies: 2
- Views: 484
Ligands
Are ligands just any molecule that has lone pairs?
- Wed Jun 13, 2018 3:18 am
- Forum: Molarity, Solutions, Dilutions
- Topic: Midterm 1 Q!C
- Replies: 2
- Views: 497
Midterm 1 Q!C
Potassiumpermanganate,KMnO4,isaninorganicchemicalcompoundusedfor cleaning wounds. 5.00 g of KMnO4 is dissolved in a 150.00 mL flask of water. If 20.00 mL of this solution is removed and placed in a new 2nd 250.00 mL flask and filled with water, what is the concentration of the solution in the 2nd fl...
- Sun Jun 03, 2018 4:18 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Naming Structures
- Replies: 8
- Views: 1060
Naming Structures
Is there an easy trick to memorizing the names of molecular structures?
- Sun Jun 03, 2018 4:13 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligands
- Replies: 8
- Views: 1341
Re: Ligands
Is this topic going to be on the final?
- Sun Jun 03, 2018 4:12 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Transition Metal Valence Electrons
- Replies: 3
- Views: 511
Transition Metal Valence Electrons
I'm confused like on the number of valence electrons of transition metals. For example why does Ti have 4 valence electrons if it only has 2 electrons in the s orbital and none in the p?
- Mon May 28, 2018 7:44 pm
- Forum: Ionic & Covalent Bonds
- Topic: Double/Triple Bonds
- Replies: 8
- Views: 1043
Double/Triple Bonds
Are there only certain atoms that can triple/double bond or how can we determine which can?
- Sun May 20, 2018 9:38 pm
- Forum: Bond Lengths & Energies
- Topic: Test 3
- Replies: 8
- Views: 840
Re: Test 3
Are we also going to have to draw lewis structures for test 3?
- Tue May 08, 2018 8:58 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: HW #1.43
- Replies: 8
- Views: 1319
Re: HW #1.43
How did you find the uncertainty in the momentum for this problem?
- Sun May 06, 2018 11:33 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: 3d before 4s
- Replies: 9
- Views: 1125
Re: 3d before 4s
I'm confused by a previous reply that says that says that 3d is higher in energy that the 4s orbital. I thought it was the other way around?
- Sun May 06, 2018 11:28 pm
- Forum: Trends in The Periodic Table
- Topic: Atomic Radius [ENDORSED]
- Replies: 4
- Views: 703
Re: Atomic Radius [ENDORSED]
Because the electrons are in the same shell there's less shielding from the protons so they are more tightly held making the atomic radius smaller across a period.
- Sun May 06, 2018 7:52 pm
- Forum: SI Units, Unit Conversions
- Topic: formula units [ENDORSED]
- Replies: 69
- Views: 32988
formula units [ENDORSED]
I was looking back at the fundamentals and I kept seeing the phrase "formula units." When a question asks you to find a quantity in terms of formula units does that just mean in terms of atoms?
- Sun Apr 29, 2018 10:47 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Balmer and Lyman Series
- Replies: 9
- Views: 1533
Re: Balmer and Lyman Series
So do we have to know like the wavelengths and other values corresponding to each series?
- Sun Apr 29, 2018 10:45 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Four Different Quantum Numbers
- Replies: 7
- Views: 789
Re: Four Different Quantum Numbers
There are 4 different quantum numbers and each gives you an idea of where the electron is located in an atom. 2 electrons can't share more than 3 numbers because that would mean that they are in the same location which is not possible because they would repel each other due to like charges.
- Sun Apr 29, 2018 9:45 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: How to properly format your answers
- Replies: 6
- Views: 661
Re: How to properly format your answers
Professor Lavelle used half arrows in lecture and the inert gas goes first and then the remaining electrons are written out.
- Sun Apr 22, 2018 7:38 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Test 1 Q2
- Replies: 2
- Views: 377
Test 1 Q2
Can someone explain how they got #2 on the test?
- Sun Apr 22, 2018 7:36 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect
- Replies: 4
- Views: 309
Photoelectric Effect
Can someone explain the photoelectric effect and its significance?
- Sun Apr 22, 2018 7:18 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test Number 1
- Replies: 10
- Views: 1268
Re: Test Number 1
Is the test gonna be curved?
- Sun Apr 08, 2018 9:37 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Accuracy vs Precision
- Replies: 23
- Views: 2739
Re: Accuracy vs Precision
Accuracy tells you how close you are to the the true value, whereas precision indicates how close measurements are to one another.
- Sun Apr 08, 2018 9:24 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Molar Mass
- Replies: 9
- Views: 1105
Molar Mass
How do you calculate the molar mass of substance?
- Sun Apr 08, 2018 9:14 pm
- Forum: SI Units, Unit Conversions
- Topic: Avagrado's Number [ENDORSED]
- Replies: 6
- Views: 1141
Avagrado's Number [ENDORSED]
Can 6.022x10^23 be used in calculations to represent both the number of molecules in a mole and atoms in a mole of a substance? Like can you use 6.022x10^23 atoms to represent a mole or only 6.022x10^23 molecules to represent a mole?