Search found 16 matches

by Morgan Zapasnik 1N
Sun Mar 19, 2017 9:55 am
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Details and Review Sessions Winter 2017
Replies: 114
Views: 13639

Re: Final Exam Details and Review Sessions Winter 2017

Here is the final review session video. If you cannot see the video, that is okay. You will be able to soon. There were some technical difficulties, but Dr. Lavelle, Jonathan, and I are getting through it. Hopefully, the video the other student recorded will be posted soon as well. Thank you for fi...
by Morgan Zapasnik 1N
Wed Mar 15, 2017 6:46 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Practice Problems
Replies: 16
Views: 1877

Re: Practice Problems

For the second molecule (when drawing Newman projection), why does the one with the lowest energy have hydrogens on the same side? As opposed to putting one hydrogen on the left and one on the right.
by Morgan Zapasnik 1N
Wed Mar 15, 2017 6:22 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Organic Chemistry Textbook Self-Test 3.3B
Replies: 1
Views: 280

Organic Chemistry Textbook Self-Test 3.3B

For part a.) of this question, it asks "Draw a Newman projection for the gauche conformation of 1-iodobutane." Can someone please help me figure out how to draw this? There is a solution in the back of the book but I don't understand which C-C bond it is looking down. I started by drawing ...
by Morgan Zapasnik 1N
Wed Mar 08, 2017 12:12 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: 15.67
Replies: 2
Views: 431

Re: 15.67

Wow, that post was super helpful, thanks for linking it!
by Morgan Zapasnik 1N
Wed Mar 08, 2017 12:07 pm
Forum: *Free Energy of Activation vs Activation Energy
Topic: Homework question 4.30
Replies: 2
Views: 732

Re: Homework question 4.30

I think it's just a fact/concept that we need to know. In a different post Dr.Lavelle said that it's written on page 154 of the organic chemistry textbook (3rd paragraph from the bottom). Hopefully that page can help a bit!
by Morgan Zapasnik 1N
Wed Mar 08, 2017 12:44 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 15891

Re: Quiz 3 Winter 2017

For question number 2, can someone explain how ethyl & methyl are on the 3rd carbon? And what does it mean by the third carbon in the hexane line structure? A description or picture would be greatly appreciated!
by Morgan Zapasnik 1N
Wed Feb 22, 2017 7:56 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 2 Winter 2017
Replies: 160
Views: 15318

Re: Quiz 2 Winter 2017

For #3, it is a first order reaction, so you use the corresponding equation ln[A] = -kt + ln[A0] so, ln(.33) = -(.0068)t + ln(.75) ln(.33/.75) = -.0068t t = ln(.33/.75)/-.0068 t = 120 sec Thank you! I had the same question the answer I got was 120.73... are we not suppose to round to three sig figs...
by Morgan Zapasnik 1N
Sun Jan 29, 2017 9:28 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: General questions [ENDORSED]
Replies: 4
Views: 674

Re: General questions [ENDORSED]

For number 4:
In Lavelle's lecture (on January 20), he mentions that 3/2 comes from... "if you take a gas molecule it can move in 3 dimensions (x,y,z), which is .5+.5+.5 which gives you 3/2". Hopefully that helps clarify it a little!
by Morgan Zapasnik 1N
Sun Jan 22, 2017 4:20 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Examples of Isolated systems [ENDORSED]
Replies: 3
Views: 901

Re: Examples of Isolated systems [ENDORSED]

My understanding is that in a closed system, you can only have an exchange/transfer in energy (heat), but not in mass.
by Morgan Zapasnik 1N
Sun Jan 15, 2017 8:43 pm
Forum: Phase Changes & Related Calculations
Topic: Triple Point
Replies: 3
Views: 341

Re: Triple Point

As a follow-up question, can the triple point occur for other molecules?
by Morgan Zapasnik 1N
Sun Dec 04, 2016 11:58 am
Forum: *Titrations & Titration Calculations
Topic: Titration Problem 8D - 2015 Final
Replies: 1
Views: 624

Titration Problem 8D - 2015 Final

Can someone please write out the chemical equation for the following problem and clarify how the titration works please? The question is 8D from the 2015 Final, and it states: "During a strong-base strong-acid titration calculate the pH when 49.00mL of 0.100M NaOH has been added to 50.00mL of 0...
by Morgan Zapasnik 1N
Sat Nov 26, 2016 9:07 pm
Forum: Naming
Topic: Naming Coordination Compounds
Replies: 5
Views: 637

Re: Naming Coordination Compounds

I have a quick follow up question about naming coordination compounds!
How do we know when to use the latin name of certain metals vs when to just use their normal names?
For example, when is iron called ferrate?
Thanks in advance!
by Morgan Zapasnik 1N
Sat Nov 19, 2016 10:59 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Fall 2016 Final Q7A
Replies: 1
Views: 198

Fall 2016 Final Q7A

The question states: "A patient died due to a blood pH of 6.5. Is this a result of acidosis or alkalosis? Based on the above overall reaction, what was a possible cause of this low pH?" The overall reaction is: CO 2 +2H 2 O = H 2 CO 3 + H 2 O = H 3 O + + HCO 3 - My question is: how do you ...
by Morgan Zapasnik 1N
Sun Nov 13, 2016 6:11 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Quiz 3 Prep: Fall 2014 #8
Replies: 1
Views: 255

Quiz 3 Prep: Fall 2014 #8

Question #8 from the Fall 2014 quiz 3 prep asks: For the following reaction, if initially 0.100 mol of H 2 O (g) is placed in a 4.0 L vessel, what is the equilibrium partial pressures of each reactant and of each product? H 2 O (g) + C(s) --> H 2 (g) + CO (g) Kp= 3.72 at 1000K Can someone please exp...
by Morgan Zapasnik 1N
Sat Nov 05, 2016 11:18 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Bond Order Overview [ENDORSED]
Replies: 1
Views: 163

Bond Order Overview [ENDORSED]

Can someone please explain what bond order is and why we would need to find it? How is calculating the bond order helpful?

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