Search found 21 matches
- Mon Mar 13, 2017 7:53 pm
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: Equatorial and Axial
- Replies: 1
- Views: 373
Re: Equatorial and Axial
Axial hydrogens are the ones that are positioned up and down on the molecule (parallel to the axis) and the equatorial hydrogens are those that radiate out around from the ring (horizontally).
- Sun Mar 12, 2017 8:25 pm
- Forum: *Chem3D
- Topic: Shape of Organic Molecules
- Replies: 2
- Views: 1422
Re: Shape of Organic Molecules
I'm not positive how likely it would be to happen in nature, but yes I think that you are correct in that organic molecules with hydrogen atoms farthest away from each other is the most stable.
- Sun Mar 05, 2017 10:14 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Special Catalysts & Reactions
- Replies: 3
- Views: 641
Re: Special Catalysts & Reactions
I'm not 100% sure, but I believe that all reactions require a minimum amount of energy, even if it is extremely small.
- Wed Mar 01, 2017 4:37 pm
- Forum: *Alkanes
- Topic: Common Names
- Replies: 2
- Views: 584
Common Names
Will we ever have to write the common name in a problem in the homework or on a quiz/exam? Or are they primarily just used as references when talking about organic molecules instead of the IUPAC name?
- Fri Feb 24, 2017 6:04 pm
- Forum: Second Order Reactions
- Topic: Third Order Reactions
- Replies: 5
- Views: 1555
Re: Third Order Reactions
What would be the integrated rate law for a third order reaction?
- Sat Feb 18, 2017 9:39 pm
- Forum: Van't Hoff Equation
- Topic: Final
- Replies: 3
- Views: 759
Final
Since we haven't used this equation on the quiz or the midterm... will we need to know it for the final?
- Wed Feb 08, 2017 9:29 pm
- Forum: General Rate Laws
- Topic: First-order reactions
- Replies: 2
- Views: 652
Re: First-order reactions
I'm not completely positive, but I believe that there can be more than one reactant for a first order reactant, we just haven't covered those yet in this course
- Mon Jan 30, 2017 11:13 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Standard Potential E [ENDORSED]
- Replies: 1
- Views: 498
Standard Potential E [ENDORSED]
Why does the Standard Potential E always have to be positive when talking about galvanic cells?
- Mon Jan 23, 2017 4:49 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Reversible/Irreversible Pathways
- Replies: 1
- Views: 492
Reversible/Irreversible Pathways
What makes a pathway reversible or irreversible and how does this relate to what we are learning? I'm kind of confused by what the graphs on page 33 of the course reader mean/signify. Thank you!
- Tue Jan 17, 2017 5:33 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat/Temperature
- Replies: 1
- Views: 420
Heat/Temperature
When do you use heat and when do you use temperature when doing calculations/describing thermodynamic terms?
- Mon Jan 16, 2017 9:02 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Equations
- Replies: 1
- Views: 330
Equations
Which thermochemistry equations are we going to need to know for the next quiz?
- Mon Nov 28, 2016 3:08 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Quiz 3 Prep Quiz #8
- Replies: 1
- Views: 558
Re: Quiz 3 Prep Quiz #8
I don't believe that the temperature affects how you solve the problem at all...it just tells you the Kc at that temperature. You should still just set up an ICE box and solve the quadratic equation for x, allowing you to solve for the concentration asked for.
- Tue Nov 22, 2016 2:30 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Higher/lower energy in a MO diagram?
- Replies: 4
- Views: 1331
Re: Higher/lower energy in a MO diagram?
The atom that is more electronegative is drawn lower in the MO diagrams. I think that there is no exact way to measure how much lower to draw it (that we are able to do right now), so just make sure that it is obvious that the energy level is lower.
- Wed Nov 16, 2016 1:24 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination number?
- Replies: 3
- Views: 1538
Re: Coordination number?
I think that the coordination number refers to how many ligands the metal is attached to...so even if there is a double bond, it counts as one (unless you are looking at polydentates, in which these bond with more than one atom and increases the coordination number)
- Thu Nov 10, 2016 2:24 pm
- Forum: Naming
- Topic: Table of all the ligand names
- Replies: 3
- Views: 814
Table of all the ligand names
For the quiz or the final, will we need to memorize the whole table on page 117 that shows all of the ligand names? Or should we just know certain common ones?
- Thu Nov 03, 2016 10:57 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Splitting Energy
- Replies: 2
- Views: 733
Re: Splitting Energy
Do we ever need to know how to calculate the exact difference in energy? Or just understand that one is lower/higher than the other?
- Thu Oct 27, 2016 5:10 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Notation used in VSEPR [ENDORSED]
- Replies: 1
- Views: 497
Notation used in VSEPR [ENDORSED]
When are we going to need to use/know the notation used in the VSEPR model (A: central atom, X: bonded atom, E: lone pair)? Will we have to write the notation for a shape on a quiz or test, or should we just know the concept in general?
- Fri Oct 21, 2016 10:23 am
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge Meaning
- Replies: 2
- Views: 1135
Formal Charge Meaning
What is the actual meaning of the formal charge of an atom, and how does it affect the compound? I understand that we want all the atoms to have formal charges of 0 because this indicates that it is the most "stable", but what does this really mean/refer to?
- Fri Oct 14, 2016 11:18 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Chapter 1 question 45
- Replies: 2
- Views: 549
Re: Chapter 1 question 45
You need to use Heisenberg's uncertainty principle (change in position x change in momentum = h/4pi), change the momentum (delta p) into mass x velocity and then plug in the mass and velocity to solve for the uncertainty in position.
- Wed Oct 05, 2016 9:12 pm
- Forum: *Shrodinger Equation
- Topic: Conceptual Questions about Shrodinger's Equation
- Replies: 1
- Views: 449
Conceptual Questions about Shrodinger's Equation
What types of conceptual questions might we be asked about this equation/what concepts should we be able to explain?
- Fri Sep 30, 2016 3:15 pm
- Forum: Photoelectric Effect
- Topic: How to find wavelength and frequency of electron if given its velocity?
- Replies: 1
- Views: 531
Re: How to find wavelength and frequency of electron if given its velocity?
I think in order to solve that question, you could use the equation: wavelength= h/p, which could be changed into wavelength= h/(mass*velocity). By plugging in Plancks constants, the mass of an electron, and its velocity, you can solve for wavelength.