Search found 31 matches

by Christian_Makar_2D
Mon Mar 13, 2017 5:23 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Axial Bonds and Equatorial Bonds
Replies: 2
Views: 353

Re: Axial Bonds and Equatorial Bonds

There aren't any physical differences except for the fact that axial bonds are drawn with a 90 degree angle to the parent chain while equatorials have a smaller slight angle. The main purpose on differentiating between the two is two be able to predict how the axial and equatorial hydrogens on the a...
by Christian_Makar_2D
Mon Mar 06, 2017 4:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 15488

Re: Quiz 3 Winter 2017

danny_nguyen_3C wrote:Are we required to know reaction mechanisms for the quiz?

If by section mechanisms you mean where we split up for example an electrophilic addition reaction into two steps and draw arrows representing where the electrons are going, then yes you must know them.
by Christian_Makar_2D
Sat Mar 04, 2017 2:52 pm
Forum: *Cycloalkanes
Topic: Numbering of Substituents [ENDORSED]
Replies: 8
Views: 1633

Re: Numbering of Substituents [ENDORSED]

If numbering order doesn't matter, then how is 1-ETHYL-3-Methyl-4-PROPYLCYCLOHEXANE wrong as opposed to 4-ETHYL-2-METHYL-1-PROPYLCYCLOHEXANE? Do you have to add all the numbers up and see which one gives the lowest?
by Christian_Makar_2D
Sat Mar 04, 2017 1:51 pm
Forum: *Cycloalkanes
Topic: Numbering of Substituents [ENDORSED]
Replies: 8
Views: 1633

Numbering of Substituents [ENDORSED]

I just wanted to clarify something from class on Friday. When you have two substituents with the same numbering, you always have to give the first named group the lower number. But if they are not the same, do you give the lower number to the last group? I just got confused because of the example on...
by Christian_Makar_2D
Tue Feb 28, 2017 11:10 am
Forum: *Nucleophiles
Topic: Term to know?
Replies: 1
Views: 212

Term to know?

There are certain terms like ambient nucleophiles and the nucleophile strength present in the green into to organic chem book that are not in the course reader. Are we responsible for knowing all of them, even if they weren't mentioned in lecture?
by Christian_Makar_2D
Sat Feb 25, 2017 3:10 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 891517

Re: Post All Chemistry Jokes Here

tumblr_n2ghuwY8Ze1rr20vfo1_500.png
Yay for complicated Lewis Structures
by Christian_Makar_2D
Tue Feb 14, 2017 6:24 pm
Forum: Student Social/Study Group
Topic: 14C discussion Switch
Replies: 1
Views: 313

Re: 14C discussion Switch

Sure if I ever get the class smh....
by Christian_Makar_2D
Tue Feb 14, 2017 10:49 am
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Stable molecules
Replies: 2
Views: 219

Re: Stable molecules

So then in the formula deltaG= deltaH-T*deltaS, how can G and H be zero but entropy is still positive?
by Christian_Makar_2D
Mon Feb 13, 2017 9:57 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Stable molecules
Replies: 2
Views: 219

Stable molecules

Is the standard entropy of formation just like enthalpy and Gibb's free energy where the value is zero when the molecule is in it's most stable form?
by Christian_Makar_2D
Tue Feb 07, 2017 9:33 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Potential Difference
Replies: 1
Views: 161

Potential Difference

What is potential difference in the conceptual sense? Is it the same as voltage?
by Christian_Makar_2D
Mon Jan 30, 2017 1:44 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Calculating Degeneracy
Replies: 2
Views: 239

Re: Calculating Degeneracy

I believe you only use the degeneracy equation when calculating the positional or residual entropy. So basically when you are dealing with calculating entropy in the molecular form, not with thermal entropy.
by Christian_Makar_2D
Mon Jan 30, 2017 1:32 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: 9.7
Replies: 1
Views: 195

Re: 9.7

All ideal gases are monoatomic gases
by Christian_Makar_2D
Tue Jan 24, 2017 10:45 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Residual Entropy
Replies: 1
Views: 214

Residual Entropy

I understand that entropy can be positional, but can someone explain what residual entropy is?
by Christian_Makar_2D
Wed Jan 18, 2017 3:42 pm
Forum: Administrative Questions and Class Announcements
Topic: Practice Quizzes in the Course Reader
Replies: 1
Views: 219

Practice Quizzes in the Course Reader

I know that there are preparation for the three quizzes along with the midterms and finals in the back of the course reader. In Chem 14 A these quizzes had the solutions in the back, but now there are not any solutions so none of us can check our answers . Are there solutions to these practice quizz...
by Christian_Makar_2D
Wed Jan 11, 2017 9:01 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Stable forms for Standard Enthalpies of Formation
Replies: 2
Views: 200

Stable forms for Standard Enthalpies of Formation

Must we memorize the stable form of every element in order to conclude that their Standard Enthalpies of Formation is zero?
by Christian_Makar_2D
Sun Dec 04, 2016 10:52 am
Forum: Resonance Structures
Topic: delocalization
Replies: 1
Views: 233

Re: delocalization

Delocalization implies that the electron in an anion is pulled away by a more electronegative element as to minimize an electronegative charge.
by Christian_Makar_2D
Tue Nov 29, 2016 11:03 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 2013 Final Question 2C
Replies: 2
Views: 316

Re: 2013 Final Question 2C

The question says that all of these have the [Kr]4d^10 configuration EXCEPT one of the following, which by what you discovered, would be Pd. So, Pd is the answer because it is the only one that does NOT have that configuration. Actually the only one that did not have a configuration of [Kr]4d^10 wa...
by Christian_Makar_2D
Mon Nov 28, 2016 1:10 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 2013 Final Question 2C
Replies: 2
Views: 316

2013 Final Question 2C

this question asks what elements can have the electron configuration [Kr]4d^10. One of the answers was Pd which when I did the configuration, I got [Kr]4d^8 5s^2. Does this mean that the exception that occurs with chromium and copper also applies to elements in that need two more electrons to fill u...
by Christian_Makar_2D
Mon Nov 21, 2016 2:44 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: When to use the approximation [ENDORSED]
Replies: 2
Views: 261

When to use the approximation [ENDORSED]

When using the ICE box to calculate the concentrations of a weak acid or base, I know that we can use an approximation in the calculation of the acidity or basicity constant if the constant is small. But what is the exact of when to to use this approximation?
by Christian_Makar_2D
Tue Nov 15, 2016 8:14 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Chlorophyll conceptual basis [ENDORSED]
Replies: 1
Views: 353

Chlorophyll conceptual basis [ENDORSED]

I remember it being mentioned in class, but how exactly does the MO diagram demonstrate how the chlorophyll absorbs certain lights and reflects green light?
by Christian_Makar_2D
Tue Nov 15, 2016 7:58 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number for (en) [ENDORSED]
Replies: 6
Views: 872

Re: Coordination Number for (en) [ENDORSED]

Caitlin Dillon 4G wrote:So since en is bidentate? Is dien tridentate because it has 3 nitrogens?

dien is a tridente because when you draw the lewis structure, the nitrogens have a lone pair and can therefore donate both of those electrons to from a coordinating bond.
by Christian_Makar_2D
Fri Nov 11, 2016 1:42 pm
Forum: Naming
Topic: Order of ligands in the reverse naming
Replies: 1
Views: 206

Order of ligands in the reverse naming

When given the name and then asked to write the formula, I know the transition metal within the brackets go first, but what is the order if you have multiple ligands? Is that alphabetical too?
by Christian_Makar_2D
Wed Nov 09, 2016 2:41 pm
Forum: Properties of Light
Topic: Question 3B on the Fall 2016 Midterm [ENDORSED]
Replies: 3
Views: 413

Question 3B on the Fall 2016 Midterm [ENDORSED]

I know a lot of my peers have been marked down on this question as well, which asks "What was the major conceptual change of the photoelectric experiment?". I have already checked the answer solution which said "Light described as packets or photons/quanta of energy." I woke that...
by Christian_Makar_2D
Mon Nov 07, 2016 1:20 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxidation State
Replies: 3
Views: 245

Re: Oxidation State

The oxidation state is basically the charge on the entire ion. So if the charge is a positive two, put "(II) right after the element name.
by Christian_Makar_2D
Mon Oct 31, 2016 1:50 pm
Forum: Hybridization
Topic: Hybridization for the midterm
Replies: 2
Views: 331

Hybridization for the midterm

At this point in the quarter are we expected to only know which hybridization to use based off knowing the corresponding number of electron regions or are there other ways to determine the hybridization of an atom?
by Christian_Makar_2D
Mon Oct 24, 2016 11:37 pm
Forum: Lewis Structures
Topic: workbook Quiz 2 preparation #7
Replies: 3
Views: 339

Re: workbook Quiz 2 preparation #7

That extra pair of electrons on Xenon is there because when you count the electrons you end up with only 32, but you need 34 total. So since Xenon is an exception to the octet rule, it can hold more electrons and that one lone pair is added to it.
by Christian_Makar_2D
Mon Oct 17, 2016 11:31 pm
Forum: Lewis Structures
Topic: Lewis Structures #3.33 (c)
Replies: 1
Views: 227

Re: Lewis Structures #3.33 (c)

You have the correct Lewis Dot Structure for ONF, the solution manual must either have a different shape showing a resonance, or it is the editor's version of writing it.
by Christian_Makar_2D
Mon Oct 10, 2016 2:40 pm
Forum: DeBroglie Equation
Topic: Conceptual Wavelength measurement
Replies: 3
Views: 264

Conceptual Wavelength measurement

What is the smallest detectable wavelength? I know for an electron the wavelength is 10^-12, are there any other wavelengths like 10^-15 that can be detected?
by Christian_Makar_2D
Tue Oct 04, 2016 9:22 pm
Forum: Student Social/Study Group
Topic: Chemistry Joke
Replies: 18
Views: 1519

Re: Chemistry Joke

What is the name of Agent 007's Eskimo cousin?
The name is Bond...Polar Bond
by Christian_Makar_2D
Wed Sep 28, 2016 7:34 pm
Forum: Properties of Light
Topic: Nature of light [ENDORSED]
Replies: 3
Views: 414

Re: Nature of light [ENDORSED]

Are there any other objects or substances that have the same dual property of wave and particle qualities the same way light does?
by Christian_Makar_2D
Mon Sep 26, 2016 3:04 pm
Forum: Student Social/Study Group
Topic: Dykstra Hall Study Group (Fall 2016)
Replies: 25
Views: 1701

Re: Dykstra Hall Study Group (Fall 2016)

Hey, I'm on Dykstra floor 9 and I would love to meet up to study as well. Let's just set up a time and place!

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