Search found 11 matches
- Thu Mar 16, 2017 12:28 am
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: Winter 2013 Final 8B
- Replies: 3
- Views: 1576
Re: Winter 2013 Final 8B
What you recalled in lecture is correct; however, in lecture, we discussed cis isomers with substituents attached to carbons 1 and 4. In cis-1-chloro-3-ethylcyclohexane, the substituents are connected to carbons 1 and 3. Cis means that both substituents will be on the same side, and therefore pointi...
- Mon Mar 13, 2017 1:41 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3589245
Re: Post All Chemistry Jokes Here
What is the chemical formula for laughing gas?
HeHeHe
HeHeHe
- Sat Mar 11, 2017 12:50 am
- Forum: *Ethers
- Topic: Ether vs Ketone [ENDORSED]
- Replies: 1
- Views: 2393
Re: Ether vs Ketone [ENDORSED]
CH3CH2CH2OCH2CH2CH2CH3 is an ether. Try to focus on the carbons surrounding the oxygen. "...CH2OCH2..." Both of these carbons are attached to two hydrogens, another neighboring carbon, and an oxygen. This means thats the bonds around the carbon must be single bonds, and therefore between t...
- Mon Feb 27, 2017 7:35 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3589245
Re: Post All Chemistry Jokes Here
A neutron walks into a bar and asks "how much for a beer?" The bartender says, "for you? no charge."
- Wed Feb 22, 2017 11:40 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3589245
Re: Post All Chemistry Jokes Here
Oxygen went on a date with Potassium. It was OK. But I thought Oxygen was with Magnesium! OMG! At first Oxygen asked out Nitrogen, but Nitrogen was all like "NO!" so Oxygen had that double bond with the Hydrogen twins...If I didn't know any better, I'd say someone was a HO, but Sodium Hypo...
- Tue Feb 14, 2017 2:10 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3589245
Re: Post All Chemistry Jokes Here
Chemistry. More like cheMYSTERY because sometimes I have no idea what's going on.
- Mon Feb 06, 2017 1:28 pm
- Forum: Balancing Redox Reactions
- Topic: Ch. 14 #5
- Replies: 1
- Views: 401
Re: Ch. 14 #5
From O3 --> O2, you want to first balance the reactions by adding H2O and OH- since the reactions are occuring in basic solutions. From there, you will get H2O+O3-->O2+2OH-. On the left side, the oxygens have a total charge of 2- (the net charge of H20 is 0, 2+ from hydrogen and 2- from oxygen; in O...
- Mon Feb 06, 2017 1:05 pm
- Forum: Balancing Redox Reactions
- Topic: 14.11 (d)
- Replies: 1
- Views: 510
Re: 14.11 (d)
Cell potentials can be negative, which indicate that the reactions are not spontaneous.
- Fri Jan 27, 2017 10:51 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Reversible vs. Irreversible
- Replies: 1
- Views: 373
Re: Reversible vs. Irreversible
Irreversible reactions are less efficient than reversible reactions, but they occur much faster than reversible reactions.
- Sun Jan 22, 2017 12:14 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Entropy
- Replies: 2
- Views: 532
Re: Entropy
Residual entropy is the entropy (disorder) of a system without taking into account any thermal energy. At 0 degrees Kelvin, the molecules of a system will not vibrate, rotate, or move, so the entropy of a system at 0K would only take into account the positions the molecules of that system. For examp...
- Sat Jan 14, 2017 6:29 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess's Law
- Replies: 5
- Views: 1474
Re: Hess's Law
As previously stated, the main formula is enthalpy of products – enthalpy of reactants. The goal is to have the given multiple reactions add up to equal the main reaction. To manipulate these reactions, you may sometimes need to either flip the reaction, or multiply it by a coefficient. For example,...