Search found 13 matches

by Victoria Lee 2C
Fri Mar 11, 2016 10:46 pm
Forum: *Nucleophilic Substitution
Topic: 2013 Final Exam Question 5C
Replies: 1
Views: 650

2013 Final Exam Question 5C

For the last part of the question regarding the transition state of NH attaching to 2nd molecule and OH leaving the molecule 2nd molecule, how do we know that the geometry of the TS is trigonal bipyramidal? Is the geometry determined with respect to where the two molecules are attaching?
by Victoria Lee 2C
Sun Mar 06, 2016 8:51 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Drawing Conformations
Replies: 2
Views: 378

Re: Drawing Conformations

No, we might be asked to label and identify but we won't have to draw them.
by Victoria Lee 2C
Mon Feb 29, 2016 4:26 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: someone please clarify
Replies: 1
Views: 366

Re: someone please clarify

You can use cis and Z interchangeably or trans and E interchangeably.
Cis and Z both mean that the highest-priority groups are on the same side of the double bond.
Trans and E both mean that the highest-priority groups are on opposite sides of the double bond.
by Victoria Lee 2C
Thu Feb 25, 2016 12:56 am
Forum: *Alkanes
Topic: Quiz 3 Preparation #2
Replies: 1
Views: 354

Re: Quiz 3 Preparation #2

I also agree with your answer that it should be 3-ethyl-2,2,4-trimethylpentane and I think someone else previously posted about this question as well so maybe looking at their post would be helpful.
by Victoria Lee 2C
Sun Feb 21, 2016 6:35 pm
Forum: *Electrophilic Addition
Topic: Electrophilic Addition of HBr to 2-Butene
Replies: 1
Views: 784

Re: Electrophilic Addition of HBr to 2-Butene

The hydrogen will attach first because the e- from the nucleophile needs to attach to the hydrogen before the H-Br bond is broken and yes it should always be the case. The e- attaching to the hydrogen is what pushes the bond to be broken because the hydrogen atom can only hold 2 valence e- or only o...
by Victoria Lee 2C
Sun Feb 07, 2016 10:17 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagrams
Replies: 3
Views: 378

Cell Diagrams

Is there a specific order we have to follow when drawing cell diagrams other than anodes on the left and cathodes on the right side?
by Victoria Lee 2C
Sun Jan 31, 2016 9:59 pm
Forum: Balancing Redox Reactions
Topic: Dissolving Gold
Replies: 1
Views: 283

Re: Dissolving Gold

Nitric acid itself shouldn't be able to dissolve pure gold but Aqua Regia which is a mix of hydrochloric and nitric acids can dissolve pure gold. Instead, nitric acid will dissolve the alloys that is often found in gold jewelry. This is what I found after looking around online. Hopefully it's accura...
by Victoria Lee 2C
Sat Jan 23, 2016 2:39 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Calculating the entropy of vaporization
Replies: 1
Views: 245

Calculating the entropy of vaporization

Hi can someone please explain for Example 9.6 on page 329 why you use Cp,m=4R for step 3 when you use the molar heat capacity of 127 J/K*mol given in the problem for step 1? Is it because for step 1, you heat liquid bromine so you have to use the molar heat capacity and for step 3, you cool bromine ...
by Victoria Lee 2C
Mon Jan 18, 2016 10:10 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Sig Figs in 8.21
Replies: 2
Views: 274

Re: Sig Figs in 8.21

When you add or subtract from the 3rd step and on to find the Tfinal, the sig figs drop to 2 because you count sig figs to the lowest decimal place when you add or subtract. Then when you divide 716 by 29, you only have 2 sig figs.
by Victoria Lee 2C
Sun Jan 10, 2016 10:13 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpies
Replies: 2
Views: 303

Bond Enthalpies

Why is the bond enthalpy for a double bond not the same as the bond enthalpy for a single bond times 2?
by Victoria Lee 2C
Mon Nov 30, 2015 6:06 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Using pH to find conc of OH- ions (HW 12.33)
Replies: 1
Views: 288

Using pH to find conc of OH- ions (HW 12.33)

Hi, so in this video we're going to explain how to find the concentration of hydronium ions given the pH of a basic solution and how to work with diluted solution. We hope it helps.
by Victoria Lee 2C
Fri Oct 09, 2015 8:49 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbital Sequences
Replies: 1
Views: 310

Re: Orbital Sequences

If you use the shorthand notation for electron configuration, then you might have an orbital sequence of only d-, s-, but you should specify the shells and the noble gas that stands for the number of inner electrons (not the valence electrons). For example, the shorthand notation for Vanadium is V: ...
by Victoria Lee 2C
Fri Oct 02, 2015 6:19 pm
Forum: DeBroglie Equation
Topic: Measurable De Broglie Wavelength
Replies: 1
Views: 311

Re: Measurable De Broglie Wavelength

Dr. Lavelle mentioned in lecture that the best we can measure are wavelengths as small as 10^-15 m.

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