Search found 22 matches
- Sat Mar 18, 2017 11:31 am
- Forum: *Aldehydes
- Topic: Names of certain functional groups
- Replies: 2
- Views: 1544
Re: Names of certain functional groups
Going off of this general post, what is a phenol functional group and what does it look like?
- Mon Mar 13, 2017 11:00 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622248
Re: Post All Chemistry Jokes Here
What is a chemist's dream car?
A Mercedes Benzene
A Mercedes Benzene
- Mon Mar 06, 2017 8:13 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 Winter 2017
- Replies: 183
- Views: 29753
Re: Quiz 3 Winter 2017
Would you ever use use neo- in IUPAC naming? If so, when and how? (please give an example)
- Mon Mar 06, 2017 11:09 am
- Forum: *Cycloalkanes
- Topic: Combining IUPAC naming with Common naming
- Replies: 1
- Views: 616
Combining IUPAC naming with Common naming
When would you combine the two types of naming (IUPAC and common) especially with ISO- and tert-?
- Mon Feb 27, 2017 11:37 am
- Forum: *Electrophilic Addition
- Topic: Relation between standard enthalpy of activation
- Replies: 1
- Views: 661
Relation between standard enthalpy of activation
What is the relationship between standard enthalpy of activation and activation energy in relation to standard Gibbs's Free energy of activation?
- Mon Feb 20, 2017 3:13 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622248
Re: Post All Chemistry Jokes Here
You must be made of uranium and iodine because all I can see is U and I!
- Tue Feb 14, 2017 10:52 am
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Mass vs Positional Entropy
- Replies: 1
- Views: 567
Mass vs Positional Entropy
When would you use mass vs positional entropy when calculating the entropy of a molecule?
- Mon Feb 06, 2017 11:24 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622248
Re: Post All Chemistry Jokes Here
What kind of dogs do chemists have?
Laboratory Retrievers
Laboratory Retrievers
- Sun Jan 29, 2017 4:00 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622248
Re: Post All Chemistry Jokes Here
What does one thermodynamic state function give?
It Gibbs free energy.
It Gibbs free energy.
- Sun Jan 29, 2017 3:46 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat Capacities Constant Pressure vs. Volume
- Replies: 2
- Views: 583
Heat Capacities Constant Pressure vs. Volume
Why are the heat capacities under constant pressure and constant volumes different? And will be need to be able to calculate them on a quiz using, for example Cp=5/2 R for monatomic ideal gasses at constant pressure?
- Mon Jan 23, 2017 2:44 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622248
Re: Post All Chemistry Jokes Here
What do you call a clown who's in jail?
A silicon.
A silicon.
- Sun Jan 15, 2017 10:18 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Enthalpy calculations
- Replies: 1
- Views: 399
Re: Enthalpy calculations
Enthalpy calculated is calculated at constant pressure, for the definition of enthalpy is the amount of heat released or absorbed at a constant pressure. So, the answer to your question would be yes.
- Fri Dec 02, 2016 9:01 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Weak Acids and Bases with Transition Metals [ENDORSED]
- Replies: 1
- Views: 721
Weak Acids and Bases with Transition Metals [ENDORSED]
Why do the weak acids that contain transition metals bond with six H2O molecules initially?
This is shown in AlCl3 becoming Al(H20)6^3+, hw problem 12.69 part b. The solution manual shows this specifically for the compounds with transition metals. But why?
This is shown in AlCl3 becoming Al(H20)6^3+, hw problem 12.69 part b. The solution manual shows this specifically for the compounds with transition metals. But why?
- Sun Nov 27, 2016 4:28 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622248
Re: Post All Chemistry Jokes Here
Chemistry is definitely not Bohr-ing.
- Mon Nov 21, 2016 3:07 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kp and Kc
- Replies: 1
- Views: 537
Re: Kp and Kc
The only difference between Kp and Kc is that one refers to the pressure of the element, in gas phase, and the other is the concentration of the element in a given solution. To tell the difference, Kc is usually shown in brackets. The difference in the values depend on the relative pressures/concent...
- Sat Nov 12, 2016 10:17 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Cis- versus Trans-
- Replies: 2
- Views: 666
Re: Cis- versus Trans-
I believe that the difference between whether or not the molecule or element is side by side or opposite each other is how they enable bonding between other molecules. The different positions would allow the molecule to bind to, say proteins, differently if they are orientated differently, and their...
- Sun Oct 30, 2016 3:08 pm
- Forum: Empirical & Molecular Formulas
- Topic: Mass % Composition
- Replies: 3
- Views: 2809
Mass % Composition
Is it necessary to calculate the mass % composition if given the grams of each element in a compound? I found that if you skip that step and go directly to converting grams into moles, you would still end up with the same ratios and thus the same answer. Would we have to show mass % comp on the midt...
- Sat Oct 29, 2016 4:53 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Determine polarization
- Replies: 1
- Views: 466
Re: Determine polarization
If you draw out the dipole moments for this compound, you'll find that they do not cancel out, for the dipoles should point from the H towards the C and from the C to the N. These vectors are not direct opposites from each other so they will not cancel out and you will get resultant vectors. You can...
- Sun Oct 23, 2016 9:00 pm
- Forum: Octet Exceptions
- Topic: Biradicals
- Replies: 1
- Views: 592
Biradicals
I don't quite understand how biradicals can exist. Why don't the two lone electrons just join and become a pair? How do biradicals play a role in the sharing of electrons and bonding of elements?
- Sat Oct 15, 2016 11:10 pm
- Forum: Resonance Structures
- Topic: Electrons in Resonance [ENDORSED]
- Replies: 4
- Views: 941
Electrons in Resonance [ENDORSED]
When there is resonance in a compound, do the electrons travel around to create those different bonds or is it in a state of somewhere in between?
- Sat Oct 08, 2016 4:44 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Orientation of the Orbitals
- Replies: 3
- Views: 912
Re: Orientation of the Orbitals
I believe that the orbitals do overlap, for they are predictions of where the electron may be, which could be the same in the different orientations of, for example, the p orbitals. In addition, since the electrons are not particles, even if the orbitals overlap, they wouldn't collide. Please correc...
- Fri Sep 30, 2016 4:42 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Empirical Equations
- Replies: 1
- Views: 548
Empirical Equations
How would we be able to get the empirical equations of the emissions of elements other than hydrogen? Would En=-hR/n^2 still work in cases other than hydrogen?