Search found 22 matches

by BrianaBarr2A
Sat Mar 18, 2017 5:36 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Rate Limiting Step
Replies: 2
Views: 343

Rate Limiting Step

In reaction mechanisms, how do we determine which step is the slow step if it is not given to us?
by BrianaBarr2A
Tue Mar 07, 2017 1:02 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 18753

Re: Quiz 3 Winter 2017

how would you draw out 2-butene or anything with a number in front of it ??? For 2-butene the number identifies where the double bond is located since but ene (the -ene means a double bond) so it is located on the second Carbon. For anything else with a number in front of it, it just means what car...
by BrianaBarr2A
Tue Mar 07, 2017 12:56 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 18753

Re: Quiz 3 Winter 2017

for #1, why do we need "iso" infant of propyl? wouldn't the 4- signify the branching? This is because "iso" identifies that there is 2 CH3's coming off of 1 CH (in all there is 3 carbons so prop). That is what CH(CH3)2 means so iso is used and it is connected to the 4th carbon a...
by BrianaBarr2A
Mon Feb 20, 2017 3:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 2 Winter 2017
Replies: 160
Views: 16357

Re: Quiz 2 Winter 2017

204177206 wrote:Will Quiz 2 be 40 minutes as well, and of similar format as Quiz 1?


Yes this is correct, Dr. Lavelle formats all his quizzes this way.
by BrianaBarr2A
Sun Feb 19, 2017 6:30 pm
Forum: General Rate Laws
Topic: Rate law factors [ENDORSED]
Replies: 2
Views: 369

Re: Rate law factors [ENDORSED]

I saw this in the chapter in the textbook and am curious about the answer/people's thoughts. It states, what would be the units of k for an overall order of 3/2 if the concentrations were expressed in grams per milliliter, g.mL-1?
by BrianaBarr2A
Thu Feb 09, 2017 12:58 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 16481

Re: Quiz 1 Preparation Answers

Is there any chance we will get the answers to Quiz 1 to help study for the midterm?
by BrianaBarr2A
Wed Feb 01, 2017 11:23 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 16481

Re: Quiz 1 Preparation Answers

Hi Everyone, I have a question on #10. So when I did the problem, I divided 200/20, but I was wondering if someone can please explain the conversion factor to get the answer on the key? Thank you I'm not sure if the conversion factor is on the key for this one or not but you first have to convert d...
by BrianaBarr2A
Wed Feb 01, 2017 11:21 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 16481

Re: Quiz 1 Preparation Answers

deantuazon2G wrote:So for number 11, do we just assume that the deltaH given is per mole?


Yes just assume it's per mole
by BrianaBarr2A
Wed Feb 01, 2017 11:20 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 16481

Re: Quiz 1 Preparation Answers

I know people have already posted how to find work (w) for #3 but what do we do to find heat (q)? I know the problem consists of an ideal gas, change in volume and pressure, etc.. but is it just a modified version of q=nC(delta_T)? From what I was told, for this q=-w so it's just the negative of wh...
by BrianaBarr2A
Sun Jan 29, 2017 4:03 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 16481

Re: Quiz 1 Preparation Answers

For number 6, I'm a little stuck on which equation to use. Could someone help me with this?
by BrianaBarr2A
Sun Jan 22, 2017 8:34 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: 8.31 Monatomic Gas
Replies: 1
Views: 234

Re: 8.31 Monatomic Gas

So for an ideal gas your focusing on only one atom. But for a monatomic gas you're focusing on multiple atoms(N) so each of the three directions (x, y, and z) contribute 1/2 kT per molecule, for a total of 3/2NkT per molecule.
Hope thats what you were looking for!
by BrianaBarr2A
Fri Jan 13, 2017 7:26 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Capacity
Replies: 3
Views: 468

Re: Heat Capacity

Heat capacity is an extensive property because it depends on the amount of the substance being used such as if 5ml is being used or 10ml. So an intensive property doesn't depend on the amount of substance being used so it doesn't matter if 5ml are being used or 10ml.
by BrianaBarr2A
Wed Nov 30, 2016 2:45 pm
Forum: *Titrations & Titration Calculations
Topic: Weak base-strong acid
Replies: 1
Views: 247

Weak base-strong acid

I'm really lost on where the third reaction comes from when writing the chemical reactions like what we did in class today. Can someone explain to me why its there and how we get it?
by BrianaBarr2A
Thu Nov 24, 2016 11:49 am
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: using log
Replies: 2
Views: 309

using log

When solving these equations, where does log come from? Why d we use log?
by BrianaBarr2A
Tue Nov 15, 2016 10:12 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kp
Replies: 6
Views: 1300

Kp

Do we include solids and liquids in Kp? I know we don't in Kc and am confused about Kp so would just like to clarify.
by BrianaBarr2A
Wed Nov 09, 2016 10:23 am
Forum: Hybridization
Topic: Hybrid Orbitals
Replies: 4
Views: 651

Re: Hybrid Orbitals

Is it true that all hybridized orbitals have sigma bonds?
by BrianaBarr2A
Wed Nov 02, 2016 4:26 pm
Forum: Hybridization
Topic: 2014 Midterm Q8
Replies: 5
Views: 513

Re: 2014 Midterm Q8

I'm very lost on how to find the hybridization of each lone pair, will this be on the midterm?
by BrianaBarr2A
Wed Oct 26, 2016 9:03 am
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Numbers and Atomic Orbitals
Replies: 3
Views: 508

Re: Quantum Numbers and Atomic Orbitals

So I know what numbers for l correspond with the given n, and I know the possible m1 values for a number l, but how do we find m2? (sorry I feel like I worded this question weird!)
by BrianaBarr2A
Wed Oct 19, 2016 6:37 pm
Forum: Ionic & Covalent Bonds
Topic: Ionization Energy [ENDORSED]
Replies: 2
Views: 406

Re: Ionization Energy [ENDORSED]

So if we were to draw a nucleus on the periodic table to show which elements are closer to it in this case, would it go in the upper right corner of the periodic table or the bottom left? (I think I'm thinking too hard about this)
by BrianaBarr2A
Wed Oct 12, 2016 9:03 am
Forum: Hybridization
Topic: Memorization Tricks
Replies: 9
Views: 1745

Re: Memorization Tricks

Does anyone have any tricks for memorizing conversion units? I'm so bad at converting and always forget to convert certain numbers and get them mixed up!
by BrianaBarr2A
Wed Oct 05, 2016 9:21 am
Forum: DeBroglie Equation
Topic: Neutrons
Replies: 4
Views: 661

Re: Neutrons

Neutrons do diffract when passing through a crystal and exhibit wave-like properties it just depends on the mass of the neutron.
by BrianaBarr2A
Wed Sep 28, 2016 10:29 am
Forum: Significant Figures
Topic: Easy Way to Calculate Sigfigs
Replies: 6
Views: 913

Re: Easy Way to Calculate Sigfigs

So if a decimal is present, the numbers before it and after it are counted and that's how many are sig figs? Then, if there is no decimal in the number, there is only one sig fig?

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