Search found 24 matches

by Elle_Bertuccelli_1B
Fri Mar 17, 2017 4:16 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Steric vs. Torsional
Replies: 1
Views: 219

Steric vs. Torsional

What is the difference between steric and torsional strain and how would we identify that when looking at the structure?
by Elle_Bertuccelli_1B
Tue Mar 07, 2017 12:25 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Quiz 2 Question
Replies: 2
Views: 369

Quiz 2 Question

I'm confused about #3, part a on Quiz 2 (where we are asked to determine the rate limiting step): It makes sense that k1 << k2 implies that k1 is the slow step. However, I don't understand why the reaction at equilibrium is considered the slow step. Usually the slow step isn't at equilibrium and the...
by Elle_Bertuccelli_1B
Mon Feb 27, 2017 12:25 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Pre-Equilibrium approach
Replies: 1
Views: 180

Pre-Equilibrium approach

When the slow step comes before the fast step, can the pre-equilibrium approach still be used?
by Elle_Bertuccelli_1B
Sat Feb 18, 2017 10:46 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 889302

Re: Post All Chemistry Jokes Here

What do you do with a sick chemist?

If you can't helium, and you can't curium, then you might as well barium
by Elle_Bertuccelli_1B
Sun Feb 05, 2017 3:06 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 889302

Re: Post All Chemistry Jokes Here

I'm always in my element...unless I'm in chemistry class.
by Elle_Bertuccelli_1B
Sat Jan 28, 2017 4:04 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Entropy=enthalpy/T
Replies: 2
Views: 289

Entropy=enthalpy/T

When is the equation [delta]S = [delta]H / T negative? I'm confused because the solutions manual contradicts the formula sheet and I'm not sure which one is right (and how to understand this conceptually).
by Elle_Bertuccelli_1B
Fri Jan 20, 2017 3:46 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: temperature [ENDORSED]
Replies: 2
Views: 376

temperature [ENDORSED]

When temperature is involved in the problem, do we use [delta]nRT instead of -P[delta]V for w?
by Elle_Bertuccelli_1B
Thu Jan 12, 2017 8:05 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 889302

Re: Post All Chemistry Jokes Here

Chemistry is a pain in the acid!!!!!
by Elle_Bertuccelli_1B
Sat Dec 03, 2016 9:29 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: When to round?! [ENDORSED]
Replies: 1
Views: 297

When to round?! [ENDORSED]

When calculating pH and concentrations, do we wait to round until the end? I am confused because this is usually how it goes, but the solutions manual rounds every single step of the way.
by Elle_Bertuccelli_1B
Fri Dec 02, 2016 9:25 am
Forum: *Biological Importance of Buffer Solutions
Topic: Heisenberg-Hasselbach
Replies: 2
Views: 591

Heisenberg-Hasselbach

Is the Heisenberg-Hasselback equation just a shortcut?
by Elle_Bertuccelli_1B
Fri Nov 25, 2016 8:03 am
Forum: Bronsted Acids & Bases
Topic: Strong vs. weak
Replies: 3
Views: 466

Strong vs. weak

How do we tell the difference between a strong acid or base and a weak one? I know that it refers to the donation of protons, but how can we tell by looking at a chemical equation?
by Elle_Bertuccelli_1B
Tue Nov 15, 2016 5:53 pm
Forum: Naming
Topic: Is Carbonate bicarbonato or bis(carbonato) [ENDORSED]
Replies: 4
Views: 578

Re: Is Carbonate bicarbonato or bis(carbonato) [ENDORSED]

I asked a UA this question, and they said to use the bis-, tris-, etc... prefixes whenever a compound is polydentate. If there is a "di" or "tri" in the molecule, that's a dead giveaway to use the other prefixes, but this rule isn't restricted to just those. Therefore, YES, it wo...
by Elle_Bertuccelli_1B
Tue Nov 15, 2016 5:29 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Shift in Equilibria
Replies: 1
Views: 234

Shift in Equilibria

When equilibria shifts, what occurs to the reactants and products from which it is shifting? For example, if we decrease the pressure of one of the reactants, the equilibria will shift left in order to try to replace the lost pressure. Does this shift mean the pressure of the products will decrease?...
by Elle_Bertuccelli_1B
Sat Nov 12, 2016 5:43 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 889302

Re: Post All Chemistry Jokes Here

I've got my ion everyone that is on this website
by Elle_Bertuccelli_1B
Sun Nov 06, 2016 1:51 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Differentiating between shapes of structure
Replies: 1
Views: 165

Differentiating between shapes of structure

When constructing a MO structure, I know that there are two different ones for a certain value of Z. Does Z refer to atomic number? What if one element of a compound has Z>8 and one has Z<8?
by Elle_Bertuccelli_1B
Sun Nov 06, 2016 1:48 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 889302

Re: Post All Chemistry Jokes Here

This chemistry joke is sodium funny!!!
by Elle_Bertuccelli_1B
Thu Oct 27, 2016 4:40 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Presence of Lone Pairs [ENDORSED]
Replies: 2
Views: 284

Presence of Lone Pairs [ENDORSED]

When determining the shape of an atom using VSEPR, how do we determine which region of electron density to replace with a lone pair? We learned about this in Wednesday's lecture but this part was unclear to me.

Thank you!
by Elle_Bertuccelli_1B
Thu Oct 20, 2016 9:44 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 889302

Re: Post All Chemistry Jokes Here

I'm trying to zinc of a good chemistry joke but it seems like all of the good ones argon. ;)
by Elle_Bertuccelli_1B
Fri Oct 14, 2016 9:54 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Magnetic Quantum Number
Replies: 1
Views: 210

Magnetic Quantum Number

Could someone explain the concept of the magnetic quantum number? I know it refers to the orientation of the electron, but how can that be applied in context?
by Elle_Bertuccelli_1B
Tue Oct 04, 2016 10:05 pm
Forum: DeBroglie Equation
Topic: Wavelength of Ejected Electron [ENDORSED]
Replies: 3
Views: 479

Wavelength of Ejected Electron [ENDORSED]

Hello,

When asked to calculate the wavelength of an ejected electron, do we use the DeBroglie Equation?

I know that it involves finding the wavelength of a moving object and just want to clarify that we aren't supposed to use the lambda=hc/E equation.

Thanks!
by Elle_Bertuccelli_1B
Tue Sep 27, 2016 7:12 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant given masses
Replies: 2
Views: 444

Limiting Reactant given masses

When finding a limiting reactant, what if the mass of only one reactant is given?

E.x. Consider the unbalanced reaction: PCl3+ H2O --->HCl + H3PO3 What mass of HCl is produced by the reaction of 23.6g of PCl3?
I'm confused because the grams of PCl3 is given, but there is no amount given for H20.

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