Search found 19 matches
- Sat Mar 18, 2017 9:14 pm
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: Dienes? (Homework 1.21)
- Replies: 1
- Views: 1369
Re: Dienes? (Homework 1.21)
Learn it just to be safe, from my understanding if it's in the homework problems it's fair game for the final.
- Sun Mar 12, 2017 2:30 pm
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: Cyclo-isomers
- Replies: 4
- Views: 833
Cyclo-isomers
In quiz 3, there was a question about drawing three different cyclic isomers for C5H10. How do you do this?
- Sat Mar 04, 2017 2:25 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3013262
Re: Post All Chemistry Jokes Here
Q: What substance has the formula HIJKLMNO?
A: Water.
A: Water.
- Sat Mar 04, 2017 2:23 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3013262
Re: Post All Chemistry Jokes Here
A photon checks into a hotel and is asked if he needs help with his luggage. He says, "No, I'm traveling light."
- Sat Mar 04, 2017 2:19 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3013262
- Tue Feb 14, 2017 7:15 pm
- Forum: Balancing Redox Reactions
- Topic: H+ and e-
- Replies: 4
- Views: 4593
H+ and e-
When balancing redox half reactions and using e- and H+ to even out the charges on both sides of the equation, why do the H+ and e- not cancel each other out if they are on the same side of the equation?
- Fri Feb 10, 2017 11:04 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Need help understanding standard hydrogen electrode
- Replies: 1
- Views: 423
Re: Need help understanding standard hydrogen electrode
Not sure if this answers your question entirely, but I believe the purpose of the standard hydrogen electrode (SHE) is to have a basis to compare all other electrodes to.
- Wed Feb 01, 2017 9:27 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Adiabatic vs Isothermal
- Replies: 2
- Views: 816
Re: Adiabatic vs Isothermal
If I'm correct, an isothermal reaction means that the temperature remains constant, whereas an adiabatic process implies that no heat is exchanged between a system and its surroundings.
- Fri Jan 27, 2017 5:43 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Enthalpy Units
- Replies: 1
- Views: 543
Enthalpy Units
I noticed in some of the textbook problems that for enthalpy, they seem to use both kJ/mol and kJ interchangeably. Can anyone help explain this to me?
- Fri Jan 20, 2017 9:38 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Standard Enthalpy of Formation and Specific Heat Capacity [ENDORSED]
- Replies: 1
- Views: 589
Standard Enthalpy of Formation and Specific Heat Capacity [ENDORSED]
Does anyone know if on a test we would be given the standard enthalpy of formation or specific heat capacity for molecules we're working with? I'm assuming we would be given ones for more obscure molecules but I wasn't sure if we needed to memorize the more common ones.
- Fri Jan 13, 2017 10:21 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Isolated Systems [ENDORSED]
- Replies: 3
- Views: 919
Re: Isolated Systems [ENDORSED]
There's truly no such thing as an isolated system, only very close to one, so I think you always have to read in between the lines as to what the problem is getting at.
- Wed Nov 30, 2016 6:01 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Hydronium and Hydroxide
- Replies: 2
- Views: 678
Re: Hydronium and Hydroxide
We have to include all the essential parts of the reaction, and the reaction would not occur without water accepting a proton to become a hydronium ion.
- Sat Nov 26, 2016 7:39 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Can you classify acids as strong or weak from their formulas alone? [ENDORSED]
- Replies: 7
- Views: 1681
Re: Can you classify acids as strong or weak from their formulas alone? [ENDORSED]
Does anybody know if the list of strong acids in the course reader is exhaustive?
- Thu Nov 17, 2016 12:36 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3013262
Re: Post All Chemistry Jokes Here
when all your friends are english majors:
- Sat Oct 29, 2016 11:38 am
- Forum: Hybridization
- Topic: s and p hybridization
- Replies: 2
- Views: 595
s and p hybridization
When finding the hybridization of a molecule like benzene, C6H6, or any other molecule with some sp hybridization, why is it that we don't say s^2 when we say p^2, p^3, etc?
- Sat Oct 22, 2016 11:47 pm
- Forum: Trends in The Periodic Table
- Topic: Px py and pz
- Replies: 4
- Views: 1759
Re: Px py and pz
The 'p' refers to the p-block of the periodic table, with that specific type of orbital. As far as I understand, x, y, and z represent the different orientations that a p-orbital can have. I've included a picture that represents the orientations and where their nodes fall.
- Fri Oct 14, 2016 6:53 pm
- Forum: Ionic & Covalent Bonds
- Topic: The Octet
- Replies: 3
- Views: 920
Re: The Octet
I only just looked this up on wikipedia, so someone please correct me if I'm wrong, but it says that the formula is that the nth shell can hold up to 2(n^2) electrons, so that would mean it is possible to have more than 8 valence electrons.
- Thu Oct 06, 2016 9:09 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Rounding and Accuracy During Tests
- Replies: 4
- Views: 990
Re: Rounding and Accuracy During Tests
To add onto this, what is the policy like for partial credit? i.e., if a problem has multiple parts and we make an arithmetic mistake in an early part that affects the subsequent answers, will we receive absolutely no credit?
- Tue Sep 27, 2016 8:41 pm
- Forum: Balancing Chemical Reactions
- Topic: How familiar should we be with Naming compounds? [ENDORSED]
- Replies: 8
- Views: 2705
Re: How familiar should we be with Naming compounds? [ENDORSED]
I'm not sure if this will be helpful to you, but I thought it was helpful in figuring out how to name compounds: http://www.chemteam.info/Nomenclature/H ... pounds.jpg