Search found 23 matches

by sophianguyen_1N
Thu Mar 16, 2017 4:33 pm
Forum: Balancing Redox Reactions
Topic: Balancing with OH- v. H+
Replies: 1
Views: 266

Re: Balancing with OH- v. H+

Occasionally, the question will tell you whether the reaction is taking place in either acidic or basic solution. If it's acidic, balance using H+. If it's basic, balance using OH- and H2O.
by sophianguyen_1N
Thu Mar 16, 2017 4:30 pm
Forum: *Haloalkanes
Topic: priority of double/triple with a halogenated compound
Replies: 1
Views: 507

Re: priority of double/triple with a halogenated compound

Yes, you are correct! Double and triple bonds take priority over all substituents.
by sophianguyen_1N
Mon Mar 13, 2017 12:47 am
Forum: *Alkanes
Topic: Condensed Structural Formula
Replies: 1
Views: 201

Re: Condensed Structural Formula

Hi! Substituents can be included in parentheses as well.
by sophianguyen_1N
Mon Mar 13, 2017 12:45 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Unit of Equilibrium Constant K
Replies: 1
Views: 278

Re: Unit of Equilibrium Constant K

Hi! K as an equilibrium constant does not have any units. However, this question asks for k, the rate constant, which does have units. The units are different occasionally depending on the order of the reaction. This is because the rate law's units are always constant, so k units change to accommoda...
by sophianguyen_1N
Wed Mar 08, 2017 2:08 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 15895

Re: Quiz 3 Winter 2017

304751905 wrote:for #1, why do we need "iso" in front of propyl? wouldn't the 4- signify the branching?

No, the 4 only denotes which carbon the substituent is attached to. If we did not use iso, the naming of the substituent would be completely different.
by sophianguyen_1N
Sun Feb 26, 2017 9:05 pm
Forum: Administrative Questions and Class Announcements
Topic: 14CL
Replies: 6
Views: 835

Re: 14CL

Hi, Does anyone know whether 14CL can be taken at the same time as 14C or whether it is reccommended to be taken after the completion of 14C? Are you currently taking 14B and 14BL together this quarter? I think it is recommended to take 14C and 14CL not concurrently b/c the course material may over...
by sophianguyen_1N
Mon Feb 20, 2017 11:23 pm
Forum: Administrative Questions and Class Announcements
Topic: 14C
Replies: 4
Views: 440

Re: 14C

Hi! I've heard from people who took the class last year that you can attend the first lecture, after which Professor Hardinger will take student information from those who wish to enroll in his class. I'm not sure if he'll be doing it this year, but it wouldn't hurt to go!
by sophianguyen_1N
Wed Feb 08, 2017 2:59 pm
Forum: General Rate Laws
Topic: Reaction order
Replies: 3
Views: 498

Re: Reaction order

Yes it is! There are reactions where the values for n or m are two or greater.
by sophianguyen_1N
Tue Feb 07, 2017 6:13 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Winter 2017
Replies: 87
Views: 14460

Re: Midterm Winter 2017

Will a list of the topics covered in each review session be posted here soon?
by sophianguyen_1N
Wed Feb 01, 2017 2:44 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Problem 8.9
Replies: 3
Views: 421

Re: Problem 8.9

You would use the conversion factor 1 L.atm = 101.325 J to convert your value.
by sophianguyen_1N
Mon Jan 30, 2017 2:16 pm
Forum: Phase Changes & Related Calculations
Topic: physical or phase change
Replies: 1
Views: 262

Re: physical or phase change

Sublimation is the conversion of a solid directly to a gas. Because enthalpy is a state function, you could also look as this process as a solid becoming a liquid first, and then a gas. The enthalpy value for that process would be the same as the solid substance becoming a gas immediately. Therefore...
by sophianguyen_1N
Sun Jan 29, 2017 11:33 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Question on Units of Temperature
Replies: 4
Views: 369

Re: Question on Units of Temperature

Mathematically, to convert from Celsius to Kelvin, you add 273.15. When you subtract two numbers that both have 273.15 added to them, they effectively cancel out, leaving you with just the final temperature minus the initial temperature but with the units now in Kelvin. Hope that helped a bit!
by sophianguyen_1N
Sun Jan 22, 2017 8:41 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: More detailed homework key
Replies: 1
Views: 288

Re: More detailed homework key

The detailed solutions can be found in the solutions manual for the textbook!
by sophianguyen_1N
Sun Jan 22, 2017 8:40 pm
Forum: Phase Changes & Related Calculations
Topic: Practice Quizes
Replies: 10
Views: 781

Re: Practice Quizes

The number of questions will probably be similar to the number on the practice quizzes!
by sophianguyen_1N
Sat Dec 03, 2016 8:30 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: copper anion/cation e configuration
Replies: 1
Views: 279

Re: copper anion/cation e configuration

The electron configuration of Cu+ is actually [Ar] 3d10. We remove electrons from the 4s orbital before the 3d orbital, because the 4s orbital is actually slightly higher than 3d when filled.
by sophianguyen_1N
Fri Nov 18, 2016 9:41 pm
Forum: Naming
Topic: Mono
Replies: 2
Views: 316

Re: Mono

Normally, it is not necessary as mono is implied if there is no other prefix present.
by sophianguyen_1N
Wed Nov 09, 2016 8:08 pm
Forum: Ideal Gases
Topic: PV=nRT
Replies: 3
Views: 530

Re: PV=nRT

I believe atms are the most common unit, but it does vary question to question. Make sure to double check the units, because the constant r also depends on the units given.
by sophianguyen_1N
Tue Nov 01, 2016 9:51 pm
Forum: Properties of Light
Topic: from the midterm booklet
Replies: 1
Views: 318

Re: from the midterm booklet

Avogadro's number is involved because the value given is the energy needed to break a mole of C-C bonds. To determine the energy needed to break one bond, you have to divide by Avogadro's number.
by sophianguyen_1N
Wed Oct 26, 2016 12:07 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Question on Wedge diagram
Replies: 2
Views: 314

Re: Question on Wedge diagram

No, I don't think so! I believe we just need to know how to identify the molecular geometry by drawing Lewis dot diagrams.
by sophianguyen_1N
Sat Oct 22, 2016 9:21 pm
Forum: Lewis Structures
Topic: Why are their two bonds on the circled bonds?
Replies: 1
Views: 312

Re: Why are their two bonds on the circled bonds?

These are double bonds, and they are needed to give each carbon atom a full octet of electrons. If you count the number of valence electrons for the molecule and compare with the number of bonds, you'll see that they correspond to each other (2 electrons for each bond). I believe the double bonds ar...
by sophianguyen_1N
Mon Oct 10, 2016 11:21 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configuration Confusion [ENDORSED]
Replies: 3
Views: 505

Re: Elecreon Configuration Confusion [ENDORSED]

No, electron configurations will not be on this quiz. They will most likely appear on the next one though!
by sophianguyen_1N
Sun Oct 09, 2016 7:57 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1019713

Re: Post All Chemistry Jokes Here

Why are chemists so great at solving problems?
Answer: Because they have all the solutions.
by sophianguyen_1N
Sun Oct 02, 2016 12:25 pm
Forum: Student Social/Study Group
Topic: Rieber Hall 14A Study Group (Fall 2016)
Replies: 49
Views: 4436

Re: Rieber Hall 14A Study Group (Fall 2016)

Hey guys! I would also be interested in joining!

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