Search found 30 matches

by Alexandria_Leaf_2F
Tue Mar 14, 2017 1:29 am
Forum: Administrative Questions and Class Announcements
Topic: 1.23 in Introduction to Organic Chemistry Course reader
Replies: 1
Views: 241

1.23 in Introduction to Organic Chemistry Course reader

How do you know that those specific isomers that they show in the solution are all the specific isomers? Like is there a tick to doing this when it asks to draw all the isomers?
by Alexandria_Leaf_2F
Tue Mar 14, 2017 1:26 am
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 186
Views: 39343

Re: Saying Thank You to Dr. Lavelle

Dear Dr. Lavelle,

Thank you for providing an extensive amount of resources to us throughout Chemistry 14A and 14B. I know that you truly want us to learn and out the effort in creating an environment in which we have the tools to fully grasp what we are learning.

All the best
Alexy
by Alexandria_Leaf_2F
Mon Mar 06, 2017 10:24 am
Forum: Administrative Questions and Class Announcements
Topic: 4.3 page 153
Replies: 1
Views: 149

4.3 page 153

Introduction to Organic Chemistry page 153:
Can electrophilic addition reactions have more than two steps/two energy barriers?
by Alexandria_Leaf_2F
Sun Mar 05, 2017 10:20 am
Forum: Administrative Questions and Class Announcements
Topic: 4.1
Replies: 3
Views: 201

Re: 4.1

Thank you!
by Alexandria_Leaf_2F
Sat Mar 04, 2017 6:25 pm
Forum: Administrative Questions and Class Announcements
Topic: 4.1
Replies: 3
Views: 201

4.1

I don't really understand page 146 in the Introduction to Organic Chemistry textbook. Specifically, what is a Grignard reaction? the wording on this page just confused me and I was wondering is someone could simplify it for me?
by Alexandria_Leaf_2F
Sun Feb 26, 2017 6:52 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7030
Views: 772419

Re: Post All Chemistry Jokes Here

Did you hear about the chemist who was reading a book about Helium? He just couldn't put it down!
by Alexandria_Leaf_2F
Mon Feb 20, 2017 10:17 am
Forum: Student Social/Study Group
Topic: Quiz
Replies: 3
Views: 264

Quiz

Does the quiz only cover up to page 73 in the course reader?
by Alexandria_Leaf_2F
Mon Feb 20, 2017 10:13 am
Forum: Zero Order Reactions
Topic: Rate Laws and Reaction order [ENDORSED]
Replies: 2
Views: 666

Re: Rate Laws and Reaction order [ENDORSED]

Yes it does, Thank You!
by Alexandria_Leaf_2F
Sat Feb 18, 2017 3:17 pm
Forum: Zero Order Reactions
Topic: Rate Laws and Reaction order [ENDORSED]
Replies: 2
Views: 666

Rate Laws and Reaction order [ENDORSED]

On page 621 of the textbook, there is an example of

2O3(g) ----> 3O2(g)

and then it says that the rate law for this reaction is

Rate= k([O3]^2/[O2]

can someone explain how that is the rate law?

Thank you!
by Alexandria_Leaf_2F
Fri Feb 17, 2017 11:04 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7030
Views: 772419

Re: Post All Chemistry Jokes Here

In a sports relay race, a chemical kinetics specialist runs slowly, and his group loses the race.

When the chemical kinetics specialist is asked why he ran slowly, his reply was “I always wanted to be the significant rate determining step”
by Alexandria_Leaf_2F
Sun Feb 12, 2017 11:16 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Chapter 14, Problem 14.19
Replies: 3
Views: 301

14.13

The reaction in 14.13 was as follows: Ce^4+(aq) + I^- (aq) ---> I2 (s) + Ce^3+(aq) I understand that in the final cell Diagram, there needs to be Pt(s) by the cerium because both the oxidized and reduced species are in the same solution (aq). But, in the solutions manual, there was a Pt(s) by the Io...
by Alexandria_Leaf_2F
Mon Jan 30, 2017 8:29 am
Forum: General Science Questions
Topic: Sig Figs with Logs
Replies: 2
Views: 425

9.59 Textbook

in 9.59b, the dissolution of CaF2 I'm water is: CaF2(s)---->CaF2(aq) technically this is increasing the disorder of the system and should have a positive entropy (positive delta S), but the solutions manual shows it to have a negative entropy. Why is that?
by Alexandria_Leaf_2F
Wed Jan 25, 2017 2:54 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz Topics
Replies: 10
Views: 992

Videos

The video links that Lavelle sent in to review all the math don't work on mine or my friends laptops, I was wondering if they are working for anyone else?
by Alexandria_Leaf_2F
Wed Jan 18, 2017 6:21 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 8.93 Textbook [ENDORSED]
Replies: 1
Views: 270

8.93 Textbook [ENDORSED]

A.) calculate the work that must be done against the atmosphere for the expansion of the gaseous products in the combustion of 1.00 mol C6H6(l) at 25 degrees celsius and 1.00 bar. B.) Using the data in appendix 2A, calculate the standard enthalpy of the reaction. C.) calculate the change in internal...
by Alexandria_Leaf_2F
Wed Jan 11, 2017 2:29 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7030
Views: 772419

Re: Post All Chemistry Jokes Here

Q: What emotional disorder does a gas chomatograph suffer from?
A: Separation anxiety.
by Alexandria_Leaf_2F
Mon Nov 28, 2016 3:07 pm
Forum: Amphoteric Compounds
Topic: HSO4-
Replies: 1
Views: 226

Re: HSO4-

Yes, it is amphoteric. Here is an example:

HSO4- + HCl <--> H2SO4 + Cl- (HSO4- here acts as a base; it accepts a proton)

HSO4- + OH- <--> SO42- + H2O (HSO4- here acts an acid; it donates a proton)
by Alexandria_Leaf_2F
Mon Nov 14, 2016 10:12 am
Forum: Ideal Gases
Topic: Ideal Gas Law and Equilibrium Constant
Replies: 7
Views: 609

Chemical Equilibrium Part 3 Module

A mixture of 2.5 moles H2O and 100 g of C are placed in a 50 L container and allowed to come to equilibrium subject to the following reaction: C(s) + H2O (g) ⇌ CO (g) + H2 (g) The equilibrium concentration of hydrogen is found to be [H2] = 0.040 M. What is the equilibrium concentration of water, [H2...
by Alexandria_Leaf_2F
Mon Nov 14, 2016 10:11 am
Forum: Ideal Gases
Topic: Ideal Gas Law and Equilibrium Constant
Replies: 7
Views: 609

Chemical Equilibrium Part 3 Module

The equilibrium constant, KP, for the reaction SO2 (g) + O2 (g) ⇌ SO3 (g) at 700 K is 3 x 104. A mixture of SO2, O2, and SO3, each at 65 bars was introduced into a container at 700 K. Is the reaction at equilibrium? If not, does SO3 tend to form or decompose?
by Alexandria_Leaf_2F
Mon Nov 14, 2016 10:09 am
Forum: Administrative Questions and Class Announcements
Topic: Chem 14B enrollment
Replies: 2
Views: 541

Re: Chem 14B enrollment

Yes! You can enroll in both. The only problem is that there aren't a lot of spots open for chem 14B next quarter so not everyone will be able to get in.
by Alexandria_Leaf_2F
Mon Nov 07, 2016 9:54 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7030
Views: 772419

Re: Post All Chemistry Jokes Here

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images.jpeg (7.29 KiB) Viewed 7495 times
by Alexandria_Leaf_2F
Mon Nov 07, 2016 9:47 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Which Diagram to draw in a bond with both elements Z<8 and Z>8 [ENDORSED]
Replies: 8
Views: 772

Re: Which Diagram to draw in a bond with both elements Z<8 and Z>8 [ENDORSED]

Are those dotted lines necessary to draw between the atomic orbitals and the molecular orbitals? Or can we leave them out?
by Alexandria_Leaf_2F
Mon Oct 31, 2016 3:50 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7030
Views: 772419

Chem Jokes!!

What do you call a tooth in a glass of water? A one molar solution. What is the name of agent 007's Eskimo cousin? Polar Bond. Q: Why do chemists call helium, curium and barium the medical elements? A: Because if you can't helium or curium, you barium! What did the chemist say when he found two isot...
by Alexandria_Leaf_2F
Mon Oct 24, 2016 9:38 am
Forum: Lewis Structures
Topic: Chapter 3#59
Replies: 2
Views: 306

Re: Chapter 3#59

With ClO, there is an odd number of electrons so Cl is going to have a radical on it. Radicals make the compound more reactive.
by Alexandria_Leaf_2F
Mon Oct 24, 2016 9:14 am
Forum: Electronegativity
Topic: Electronegativity
Replies: 2
Views: 331

Re: Electronegativity

No, there isn't any electronegativity values on the periodic table that we are provided with.
by Alexandria_Leaf_2F
Wed Oct 19, 2016 12:28 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Px, Py, Pz [ENDORSED]
Replies: 1
Views: 393

Re: Px, Py, Pz [ENDORSED]

Using P is the same thing as using Px, Py, and Pz. It just helps to use Px, Py, and Pz so that you can fully see how the electrons fill the orbitals. Doing it this way makes it easier to see the lone pairs of electrons.
by Alexandria_Leaf_2F
Mon Oct 10, 2016 7:38 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty
Replies: 11
Views: 1749

Heisenberg post module assessment #2

The hydrogen atom has a radius of approximately 0.05 nm. Assume that we know the position of an electron to an accuracy of 1 % of the hydrogen radius, calculate the uncertainty in the speed of the electron using the Heisenberg uncertainty principle. I am not really sure where to begin with this ques...
by Alexandria_Leaf_2F
Mon Oct 03, 2016 11:12 pm
Forum: Properties of Light
Topic: Textbook Chapter 1, Question 9
Replies: 1
Views: 322

Textbook Chapter 1, Question 9

A college student recently had a busy day. Each of the student;s activities on that day (reading, getting a dental x-ray, making popcorn in a microwave oven, and acquiring a suntan) involved radiation from a different part of the electromagnetic spectrum. Complete the following table and match each ...
by Alexandria_Leaf_2F
Wed Sep 28, 2016 7:23 am
Forum: Student Social/Study Group
Topic: Chemistry Jokes
Replies: 31
Views: 3980

Re: Chemistry Jokes

What do Batman and sodium have in common? Na-Na-Na-Na-Na-Na-Na-Na What did the Angry electron say when it was compelled? Let me atom! (Here's some chemistry pick up lines as well): Are you made of copper and tellurium? because you're CuTe! You're like an exothermic reaction, you spread your hotness ...

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