Search found 24 matches

by Abbey Kerscher 3O
Sat Mar 18, 2017 12:43 pm
Forum: General Science Questions
Topic: Winter Final 2013 Q4
Replies: 1
Views: 476

Winter Final 2013 Q4

I'm confused on how in part A, they were able to get n. Please help!!
by Abbey Kerscher 3O
Fri Mar 17, 2017 2:32 pm
Forum: Stereochemistry in Organic Compounds (Chirality, Stereoisomers, R/S, d/l, Fischer Projections)
Topic: Cis vs. trans
Replies: 1
Views: 1339

Cis vs. trans

when do we use cis and trans on a molecule vs using Z and E? Does it matter?
by Abbey Kerscher 3O
Tue Mar 14, 2017 7:03 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1020315

Re: Post All Chemistry Jokes Here

Q: What do you do with a sick chemist?
A: If you can't helium, and you can't curium, then you might as well barium.
by Abbey Kerscher 3O
Tue Mar 14, 2017 7:00 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Equatorial and axial bonds
Replies: 4
Views: 855

Re: Equatorial and axial bonds

It doesn't matter if as long as you alternate.
by Abbey Kerscher 3O
Mon Mar 13, 2017 11:51 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Equatorial and axial bonds
Replies: 4
Views: 855

Equatorial and axial bonds

How do you identify an equatorial bond versus an axial bond?
by Abbey Kerscher 3O
Mon Mar 13, 2017 11:39 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1020315

Re: Post All Chemistry Jokes Here

What kind of bear dissolved in water?

A polar bear!
by Abbey Kerscher 3O
Sat Mar 04, 2017 4:45 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1020315

Re: Post All Chemistry Jokes Here

!!!
by Abbey Kerscher 3O
Wed Feb 22, 2017 1:10 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Speed of reaction
Replies: 1
Views: 280

Speed of reaction

How are you able to tell if one equation is faster than the other when it comes with an intermediate? Is it usually given that it is faster/sower?
by Abbey Kerscher 3O
Wed Feb 08, 2017 3:31 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: What is N?
Replies: 1
Views: 247

What is N?

What does Professor Lavelle mean when he says n helps find the mechanism?
by Abbey Kerscher 3O
Fri Feb 03, 2017 1:10 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: What has more enthalpy?
Replies: 1
Views: 315

What has more enthalpy?

How do you find which molecule has a greater enthalpy? Does is just matter based on the state of the molecule or does it have to do with heat?
by Abbey Kerscher 3O
Mon Jan 23, 2017 1:23 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.19 part a
Replies: 1
Views: 305

8.19 part a

How do you answer this I'm so confused.
Calculate the heat that must be supplied to a 500.0 g copper kettle containing 400.0 g of water to raise its temperature from 22.0 degrees C to the boiling point of water, 100.0degrees C.
by Abbey Kerscher 3O
Sun Jan 22, 2017 6:00 pm
Forum: Calculating Work of Expansion
Topic: Changing L•atm to J [ENDORSED]
Replies: 1
Views: 296

Changing L•atm to J [ENDORSED]

I noticed in a lot of homework problems from chapter 8 that the solution guide would go from L•atm to J and I don't know how to do that. Another question I have is will we need to know that conversion for any quizzes and/or the midterm?
by Abbey Kerscher 3O
Fri Jan 13, 2017 2:02 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1020315

Re: Post All Chemistry Jokes Here

Q: Why can you never trust atoms? A: They make up everything.
by Abbey Kerscher 3O
Tue Nov 29, 2016 12:33 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Identifying a strong acid
Replies: 6
Views: 1071

Identifying a strong acid

What is the cut off for an acid to be a strong acid versus being a weak one? Is a strong acid only 1 or 2 on the pH scale?
by Abbey Kerscher 3O
Fri Nov 18, 2016 7:58 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1020315

Re: Post All Chemistry Jokes Here

Hopefully nobody has grades like this here!!
by Abbey Kerscher 3O
Thu Nov 03, 2016 6:01 pm
Forum: Hybridization
Topic: Dipole Moment
Replies: 2
Views: 372

Dipole Moment

When you have a dipole moment to figure out if a molecule is polar or non polar, does the arrow point from least electronegative to the most, or does it depend on the formal charge of each atom in the molecule like -1 and +1?
by Abbey Kerscher 3O
Thu Oct 27, 2016 12:16 pm
Forum: Lewis Structures
Topic: Expanded Octet
Replies: 3
Views: 442

Expanded Octet

How do you know when you can have an expanded octet? Is it only in the D block or is it anything in the third period and down on the periodic table? Thank you!
by Abbey Kerscher 3O
Wed Oct 19, 2016 2:31 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic vs. Covalent Bonds [ENDORSED]
Replies: 2
Views: 489

Ionic vs. Covalent Bonds [ENDORSED]

I don't really understand why/how electronegativity determines a molecule having an ionic bond or a covalent bond. Can someone please help?
by Abbey Kerscher 3O
Sat Oct 15, 2016 10:18 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz Grades
Replies: 3
Views: 540

Quiz Grades

Where can we find quiz/test grades?
by Abbey Kerscher 3O
Fri Oct 14, 2016 3:30 pm
Forum: Lewis Structures
Topic: Lewis Structure Example on page 79 of Course Reader
Replies: 1
Views: 272

Lewis Structure Example on page 79 of Course Reader

On page 79 of the course reader, at the very bottom of the page, there is a diagram of how (NH4)2 SO4 should be portrayed with Lewis Structure. All of it made sense to me except there is the number 4 placed in front of the diagram showing SO4. Was that a typo or is there an actual reason that's ther...
by Abbey Kerscher 3O
Thu Oct 06, 2016 6:01 pm
Forum: Photoelectric Effect
Topic: Question 1.33 (c) from the textbook [ENDORSED]
Replies: 2
Views: 481

Question 1.33 (c) from the textbook [ENDORSED]

The question 1.33 (c) asks "what is the wavelength of the radiation that caused photo ejection of the electron?" In part a, it tells you the velocity is 3.6 x 10^3 km/s and in part b, you find the frequency which is 1.66 x 10^(-17) J. In part C you're supposed to start out with finding the...
by Abbey Kerscher 3O
Thu Oct 06, 2016 5:39 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect [ENDORSED]
Replies: 12
Views: 1453

Re: Photoelectric Effect [ENDORSED]

Larger wavelengths do "have photons." A larger wavelength of light may not eject an electron for a particular type of metal because the energy of the incident light, a.k.a the photons hitting the metal, depends on the frequency according to the equation E = hv, where E is the energy of th...
by Abbey Kerscher 3O
Wed Sep 28, 2016 2:30 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect [ENDORSED]
Replies: 12
Views: 1453

Photoelectric Effect [ENDORSED]

During the lecture we discussed light acting in waves and in photons. I understood that you can increase the intensity of a large wavelength, but will not get ejected electrons. However, because the light is working as photons, does that mean that larger wavelengths don't have photons- since there a...

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