Search found 20 matches

by DanielaWong_2G
Fri Mar 17, 2017 12:08 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 202
Views: 66340

Re: Saying Thank You to Dr. Lavelle

Dear Dr. Lavelle, I can't tell you enough how grateful I am to have have the pleasure of having you as a professor for the past two quarters. I have always struggled with chemistry but you've allowed me to grow and learn from my mistakes and you've always encouraged us to do our best. Thank you a mi...
by DanielaWong_2G
Fri Mar 10, 2017 2:13 pm
Forum: *Electrophiles
Topic: Nucleophile vs Electrophile
Replies: 5
Views: 921

Re: Nucleophile vs Electrophile

I think it has to do with whether or not the molecule has electrons that are readily available. If it does, it would be considered a nucleophile
by DanielaWong_2G
Fri Mar 03, 2017 6:49 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 890777

Re: Post All Chemistry Jokes Here

Graduated cylinder
by DanielaWong_2G
Wed Feb 22, 2017 10:05 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 2 Winter 2017
Replies: 160
Views: 14866

Re: Quiz 2 Winter 2017

I'm not sure why I keep getting this wrong but for number 6 I keep getting 1.66 for the value of k. Could somebody please help?
by DanielaWong_2G
Wed Feb 15, 2017 10:58 am
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Ideal Gas Law- delta U
Replies: 1
Views: 297

Ideal Gas Law- delta U

Hi! So I realize that when V is constant, w=0 (although I'm not sure why), but why is delta U =0 when delta T is 0? Is it derived from equations or is just something we're supposed to know?
by DanielaWong_2G
Wed Feb 08, 2017 11:02 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 890777

Re: Post All Chemistry Jokes Here

Me
by DanielaWong_2G
Thu Feb 02, 2017 12:11 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 13385

Re: Quiz 1 Preparation Answers

Can someone please explain why #8 is "no temperature"? since delta G = delta H - T* delta S, and delta S is negative, the value of delta G will always be positive, no matter what value is inserted. In order for a process to be spontaneous, delta G has to be negative, and in this case, no ...
by DanielaWong_2G
Sun Jan 22, 2017 10:22 pm
Forum: Phase Changes & Related Calculations
Topic: Study Group
Replies: 7
Views: 575

Re: Study Group

I'd love to jump in if I could!
by DanielaWong_2G
Wed Nov 23, 2016 1:34 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 890777

Re: Post All Chemistry Jokes Here

Loved this one
by DanielaWong_2G
Tue Nov 22, 2016 11:07 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Chapter 12 Question 19
Replies: 1
Views: 242

Re: Chapter 12 Question 19

In sum, you should be using a variable, and not a value. So the molarity of HCl would be (.12)*([HCl]). From here you can go about the change in pH which would be -log((0.12*HCl)/(HCl)) which gives you 0.92. So the change in pH is 0.92.
by DanielaWong_2G
Tue Nov 22, 2016 11:03 pm
Forum: Student Social/Study Group
Topic: Final Study Group
Replies: 12
Views: 1332

Re: Final Study Group

Count me in!
by DanielaWong_2G
Tue Nov 15, 2016 9:42 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K vs Q [ENDORSED]
Replies: 4
Views: 450

K vs Q [ENDORSED]

Hello! I know that Q and K are calculated the same way, but can someone explain what the difference between the two is?
by DanielaWong_2G
Sat Nov 12, 2016 3:40 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 890777

Re: Post All Chemistry Jokes Here

Why did Barium, Carbon, Potassium, and Sulfur get along so well?

They had each others BaCKS
by DanielaWong_2G
Fri Nov 04, 2016 9:01 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 890777

Re: Post All Chemistry Jokes Here

LOL
by DanielaWong_2G
Sun Oct 23, 2016 9:16 pm
Forum: Lewis Structures
Topic: Central Atom
Replies: 5
Views: 572

Central Atom

How do we determine what the central atom is? I know I wrote it down somewhere but I can't seem to find it. Was it the higher electronegative atom?
by DanielaWong_2G
Sun Oct 23, 2016 9:10 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configuration for Ions
Replies: 1
Views: 303

Re: Electron Configuration for Ions

I believe the proper configuration would be [Ar]
by DanielaWong_2G
Tue Oct 11, 2016 7:40 pm
Forum: Limiting Reactant Calculations
Topic: __ Al(s) + __ HCl(aq) --> __ AlCl3(aq) + __H2(g)
Replies: 3
Views: 6679

Re: __ Al(s) + __ HCl(aq) --> __ AlCl3(aq) + __H2(g)

I did that, but i got a different answer than the one in the book. I got 4.49 but it says the answer is 9.51 and i can't figure out what I did wrong
by DanielaWong_2G
Wed Oct 05, 2016 11:24 pm
Forum: Photoelectric Effect
Topic: Work Function and Threshold Energy [ENDORSED]
Replies: 3
Views: 1668

Work Function and Threshold Energy [ENDORSED]

Hi guys! So I'm a little unclear on whether the work function and the threshold energy are the same thing? I know the work function is the energy required to remove an electron but wouldn't it be the same number as the threshold energy?
by DanielaWong_2G
Wed Oct 05, 2016 11:22 pm
Forum: *Black Body Radiation
Topic: Quiz one topics
Replies: 7
Views: 783

Re: Quiz one topics

My TA told us that it'll be everything we've learned so far. Also on Professor Lavelle's website, the quiz and exam schedule is up and it says quiz 1 will cover all material from the beginning (including fundamentals) through October 7th, which is Friday's lecture (: I hope that helps!
by DanielaWong_2G
Sun Oct 02, 2016 9:26 pm
Forum: Molarity, Solutions, Dilutions
Topic: Homework problem Fundamentals E.15
Replies: 1
Views: 318

Re: Homework problem Fundamentals E.15

So I think what's happening is that there is no specific metal that they're asking for. So you'd start off by figuring out the mass of OH which is 34.02. You subtract that from the overall mass and it leaves you with 40.08 (the mass of Ca). Since they're asking for SULFIDE, you can add the mass of s...

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