Search found 21 matches

by Natassia Dunn 3G
Mon Mar 13, 2017 7:53 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Equatorial and Axial
Replies: 1
Views: 194

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).
by Natassia Dunn 3G
Sun Mar 12, 2017 8:25 pm
Forum: *Chem3D
Topic: Shape of Organic Molecules
Replies: 2
Views: 557

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.
by Natassia Dunn 3G
Sun Mar 05, 2017 10:14 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Special Catalysts & Reactions
Replies: 3
Views: 345

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.
by Natassia Dunn 3G
Wed Mar 01, 2017 4:37 pm
Forum: *Alkanes
Topic: Common Names
Replies: 2
Views: 277

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?
by Natassia Dunn 3G
Fri Feb 24, 2017 6:04 pm
Forum: Second Order Reactions
Topic: Third Order Reactions
Replies: 5
Views: 623

Re: Third Order Reactions

What would be the integrated rate law for a third order reaction?
by Natassia Dunn 3G
Sat Feb 18, 2017 9:39 pm
Forum: Van't Hoff Equation
Topic: Final
Replies: 3
Views: 362

Final

Since we haven't used this equation on the quiz or the midterm... will we need to know it for the final?
by Natassia Dunn 3G
Wed Feb 08, 2017 9:29 pm
Forum: General Rate Laws
Topic: First-order reactions
Replies: 2
Views: 344

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
by Natassia Dunn 3G
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: 268

Standard Potential E [ENDORSED]

Why does the Standard Potential E always have to be positive when talking about galvanic cells?
by Natassia Dunn 3G
Mon Jan 23, 2017 4:49 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Reversible/Irreversible Pathways
Replies: 1
Views: 293

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!
by Natassia Dunn 3G
Tue Jan 17, 2017 5:33 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat/Temperature
Replies: 1
Views: 216

Heat/Temperature

When do you use heat and when do you use temperature when doing calculations/describing thermodynamic terms?
by Natassia Dunn 3G
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: 187

Equations

Which thermochemistry equations are we going to need to know for the next quiz?
by Natassia Dunn 3G
Mon Nov 28, 2016 3:08 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Quiz 3 Prep Quiz #8
Replies: 1
Views: 305

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.
by Natassia Dunn 3G
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: 609

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.
by Natassia Dunn 3G
Wed Nov 16, 2016 1:24 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination number?
Replies: 3
Views: 538

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)
by Natassia Dunn 3G
Thu Nov 10, 2016 2:24 pm
Forum: Naming
Topic: Table of all the ligand names
Replies: 3
Views: 396

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?
by Natassia Dunn 3G
Thu Nov 03, 2016 10:57 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Splitting Energy
Replies: 2
Views: 378

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?
by Natassia Dunn 3G
Thu Oct 27, 2016 5:10 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Notation used in VSEPR [ENDORSED]
Replies: 1
Views: 277

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?
by Natassia Dunn 3G
Fri Oct 21, 2016 10:23 am
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge Meaning
Replies: 2
Views: 634

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?
by Natassia Dunn 3G
Fri Oct 14, 2016 11:18 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Chapter 1 question 45
Replies: 2
Views: 307

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.
by Natassia Dunn 3G
Wed Oct 05, 2016 9:12 pm
Forum: *Shrodinger Equation
Topic: Conceptual Questions about Shrodinger's Equation
Replies: 1
Views: 273

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?
by Natassia Dunn 3G
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: 290

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.

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