Search found 25 matches

by Ryan Cerny 3I
Mon Mar 13, 2017 11:02 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1014902

Re: Post All Chemistry Jokes Here

I'm aldehyde, I am going to try and hide myself within the middle of the carbon chain......."-al"

This joke is an onomatopoeia, a pun, AND a helpful pneumonic for remembering ether functional group. Chose ether one to focus on.
by Ryan Cerny 3I
Sat Mar 11, 2017 3:31 pm
Forum: *Haloalkanes
Topic: Functional Groups [ENDORSED]
Replies: 7
Views: 1227

Re: Functional Groups [ENDORSED]

Are we expected to be able to name compounds with multiple functional groups?
by Ryan Cerny 3I
Tue Mar 07, 2017 7:58 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1014902

Re: Post All Chemistry Jokes Here

Why did the bacterium die?
It was invaded by a retro- isopropyl-hexane!!!!!!!!!
by Ryan Cerny 3I
Wed Mar 01, 2017 12:21 pm
Forum: *Electrophiles
Topic: Electrophile Vs. Nucleophile
Replies: 3
Views: 410

Re: Electrophile Vs. Nucleophile

Do lewis acids ALWAYS correspond to electrophiles, and lewis bases with nucleophiles? Is it that clear cut and determinable?
by Ryan Cerny 3I
Tue Feb 21, 2017 9:36 am
Forum: General Rate Laws
Topic: Units of K
Replies: 4
Views: 1862

Re: Units of K

K(units) = (L/mol)^(overall n -1) x s^-1
by Ryan Cerny 3I
Mon Feb 13, 2017 7:33 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: K
Replies: 1
Views: 225

K

Thermodynamically-speaking does K, in addition to being the equilibrium constant, indicate standard conditions?
by Ryan Cerny 3I
Sat Feb 11, 2017 12:39 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: Midterm Winter 2013 problem 5B
Replies: 10
Views: 916

Re: Midterm Winter 2013 problem 5B

If CF4 is symmetric then why would it be ranked the highest for molar entropy? Shouldn't it be ranked the lowest?
by Ryan Cerny 3I
Thu Feb 09, 2017 9:44 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: Midterm Winter 2013 problem 5B
Replies: 10
Views: 916

Midterm Winter 2013 problem 5B

We are supposed to rank CHF3, CF4, CH3F, and CH2F2 in order of increasing standard molar entropy.
The answer is CH3F<CH2F2<CHF3<CF4.

Why wouldn't it be CF4<CH3F<CHF3<CH2F2?

Thank you.
by Ryan Cerny 3I
Wed Feb 01, 2017 2:32 pm
Forum: Balancing Redox Reactions
Topic: Pneumonic Device
Replies: 3
Views: 446

Pneumonic Device

Here is a useful pneumonic device to help you associate reduction with gaining electrons and oxidation with losing electrons:

Reduction--> reducing (positive) charge (therefore e-s must be gained in the process)

Therefore, Oxidation--> loses e-s (by process of elimination)
by Ryan Cerny 3I
Fri Jan 27, 2017 9:14 am
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Change in the entropy of the universe
Replies: 1
Views: 206

Change in the entropy of the universe

For dStotal = dSsys + dSsurr what conditions make dStotal = to 0?
by Ryan Cerny 3I
Fri Jan 20, 2017 9:35 am
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Scaling Enthalpy
Replies: 1
Views: 247

Scaling Enthalpy

For a reaction A + B -> C + 2D with all gases, and the dH of the reaction is, say, 100kj, would the following parameters be scaled with x amount of A?:
(1) the dH (would it be xdH for that amount reacted)?
(2) the dn (would the net change in moles of gas be scaled)?
by Ryan Cerny 3I
Fri Jan 13, 2017 7:51 am
Forum: Phase Changes & Related Calculations
Topic: The Heating Curve Graphical Comparisons of C
Replies: 1
Views: 158

The Heating Curve Graphical Comparisons of C

On the heating curve, when the enthalpy increase (q at constant pressure) increases the temperature (and we have a diagonal line with a positive slope) there is something very useful for which to take note: The lower the C (heat capacity) of the substance in a given phase, the steeper (more positive...
by Ryan Cerny 3I
Tue Nov 29, 2016 5:43 pm
Forum: Conjugate Acids & Bases
Topic: Are names provided? [ENDORSED]
Replies: 1
Views: 328

Are names provided? [ENDORSED]

Will we be provided with all of the names of the compounds or do we have to memorize them? And if so which ones?
by Ryan Cerny 3I
Tue Nov 22, 2016 10:11 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1014902

Acids and Bases joke

Before this class I always presumed that determining the relative strength of acids and bases would be challenging. Turns out learning about NaOH, for example, is pretty basic.
by Ryan Cerny 3I
Tue Nov 15, 2016 10:00 am
Forum: Naming
Topic: Ordering ligands within a complex (not naming!)
Replies: 1
Views: 193

Re: Ordering ligands within a complex (not naming!)

Also how would polydentates like C2O4^2- (often written as ox) affect this?
by Ryan Cerny 3I
Tue Nov 15, 2016 9:28 am
Forum: Naming
Topic: Ordering ligands within a complex (not naming!)
Replies: 1
Views: 193

Ordering ligands within a complex (not naming!)

For actually writing the formula with brackets (not giving the long name) what would be the order? WHAT IS THE RULE FOR ORDERING THE LIGANDS? - Are the ligands placed in alphabetical order ACCORDING TO THEIR NAME (even though we're writing the symbols)? For example, for Diamminetetrahydroxochromate(...
by Ryan Cerny 3I
Mon Nov 07, 2016 10:23 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligand formation
Replies: 1
Views: 206

Ligand formation

Is it vital that we know how to determine how many ligands a TM cation can form? Is there even a way to deduce this?
by Ryan Cerny 3I
Mon Oct 31, 2016 1:24 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: D-block exceptions for midterm and f-block
Replies: 4
Views: 637

D-block exceptions for midterm and f-block

I have found a total of 10 atoms located in the d-block (two of them being chromium and copper), do we have to know all 10 exceptions for the midterm? (what about the final?) Also, are we going to be asked to draw the electron configurations for f-block elements?
by Ryan Cerny 3I
Mon Oct 31, 2016 1:18 pm
Forum: Balancing Chemical Reactions
Topic: Chemical Equations and Molecular Phases
Replies: 1
Views: 466

Chemical Equations and Molecular Phases

When we are told to balance a chemical equation (and are asked to include the phases of the atoms and molecules) how can we determine which phases to use?
by Ryan Cerny 3I
Mon Oct 24, 2016 4:02 pm
Forum: Bond Lengths & Energies
Topic: Bond Order
Replies: 2
Views: 367

Bond Order

I noticed that bond order was one of the topics covered on past midterms; where is that in the book? One would expect that to be located in near the end of CH3 which covers the specifics on bond lengths and energies. Am I just crazy?
by Ryan Cerny 3I
Wed Oct 19, 2016 11:36 am
Forum: Quantum Numbers and The H-Atom
Topic: Quantum numbers trick with angular momentum quantum number [ENDORSED]
Replies: 1
Views: 458

Quantum numbers trick with angular momentum quantum number [ENDORSED]

Its true that the number of orbitals which belong to a specific sub shell is specific to which "l" you are referring. For instance, the s-subshell has 1 orbital, the p has 3, the d has 5, and the f has 7. Using rate of increase (2 orbitals/change in l) and the initial value (1 orbital) you...
by Ryan Cerny 3I
Sun Oct 16, 2016 11:40 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1014902

Re: Post All Chemistry Jokes Here

I can't wait until we are finished with our chemistry final- then we Argon.

Which element is the most medicinal?
-Curium
by Ryan Cerny 3I
Tue Oct 11, 2016 10:21 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Exceptions
Replies: 1
Views: 234

Exceptions

Dr. Lavelle mentioned that copper and chromium are exceptions to the rule for writing electron configurations of atoms; wouldn't that mean that all of the atoms within both of the groups in which copper and chromium belong?
by Ryan Cerny 3I
Thu Oct 06, 2016 4:33 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: wave functions and the heisenburg uncertainty [ENDORSED]
Replies: 1
Views: 221

wave functions and the heisenburg uncertainty [ENDORSED]

If (Psi)^2 that represents the probability of finding an electron, how does the Heisenburg equation relate to that?
by Ryan Cerny 3I
Mon Sep 26, 2016 11:16 pm
Forum: Balancing Chemical Reactions
Topic: Balancing a chemical equation with multiple compounds
Replies: 1
Views: 330

Balancing a chemical equation with multiple compounds

Here is a long and complicated trick I can up with balance a complex chemical equation: 1) Find an atom this is only contained in one reactant and in one product. For which ever molecule contains more of that atom, assign a coefficient of "X" and scale the the molecules' coefficient (with ...

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