Search found 21 matches
- Tue Mar 08, 2016 10:08 pm
- Forum: *Alcohols
- Topic: Naming Conventions
- Replies: 1
- Views: 527
Re: Naming Conventions
yes, I think both names are correct answers and considered the same
- Tue Mar 01, 2016 11:52 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2980021
Re: Chemistry Jokes
What substance has the formula HIJKLMNO? Water
hehe
hehe
- Fri Feb 26, 2016 12:37 am
- Forum: *Alkanes
- Topic: Alphabetizing when naming
- Replies: 1
- Views: 381
Alphabetizing when naming
Hi, I just wanted to clarify: when naming a hydrocarbon using its common name, iso- and neo- count in alphabetizing but tert- and sec- do not count, is this correct?
- Sun Feb 21, 2016 2:39 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2980021
Re: Chemistry Jokes
What is the name of the molecule CH2O?
A: Seawater
A: Seawater
- Tue Feb 09, 2016 1:34 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2980021
Re: Chemistry Jokes
Karina Keus 3L wrote:I'd post a funny chemistry joke, but all the good ones Argon!
Nah, I got one. Argon walks into a bar. The bartender says "sorry, we don't serve noble gases here." Argon doesn't react.
- Sun Feb 07, 2016 4:29 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Notation - which metal to use for anode/cathode
- Replies: 1
- Views: 785
Cell Notation - which metal to use for anode/cathode
When writing cell notation, how do we know whether to use Pt or another metal? Or would we just write Platinum to be safe?
- Sun Jan 31, 2016 10:55 pm
- Forum: Phase Changes & Related Calculations
- Topic: Unable to watch podcasts
- Replies: 1
- Views: 427
Unable to watch podcasts
I was trying to rewatch Dr. Lavelle’s podcast lectures and the website told me to download silverlight so I did but it still doesn’t work. I was using safari, and I was able to watch the podcasts last week but now it won’t work. Help please lol
- Sun Jan 24, 2016 4:09 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Standard residual entropy problem
- Replies: 2
- Views: 2086
Standard residual entropy problem
This question says "Assume COF2 adopted disordered arrangements in its crystal form, what would its residual molar entropy be?" and the answer is W = 3NA, S = k ln 3 NA = R ln 3 = 9.1 J/K. How would I go about solving this problem? Thanks.
- Sun Jan 17, 2016 11:41 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Isothermal
- Replies: 1
- Views: 537
Re: Isothermal
I think this happens because although the overall heat change is zero, work can still be put into the system as heat energy, sometimes very slowly, but the same amount of energy/heat leaves the system so the over heat change is zero and the temperature stays constant.
- Sun Jan 10, 2016 2:25 pm
- Forum: Calculating Work of Expansion
- Topic: Reversible and irreversible process
- Replies: 2
- Views: 649
Re: Reversible and irreversible process
A process is reversible when the overall entropy is equal to zero (isentropic). A process is irreversible when the entropy increases. Hope that helps a little bit
- Tue Dec 01, 2015 3:03 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: How to identify weak/strong acids/bases
- Replies: 1
- Views: 648
How to identify weak/strong acids/bases
I'm having trouble remembering which compounds are strong/weak acids/bases. Is there a way to distinguish a strong acid from a weak one? or is it more of a memorization kind of thing? Thanks.
- Sun Nov 29, 2015 7:01 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Basic and Acidic Oxides
- Replies: 1
- Views: 702
Re: Basic and Acidic Oxides
Hi, Acidic oxides tend to contain elements from the right side of the periodic table while basic oxides contain elements from the left side of the table (groups 1&2). So BaO is a basic oxide and SO3 is a acidic oxide
- Tue Nov 17, 2015 5:21 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 question?
- Replies: 1
- Views: 776
Re: Quiz 3 question?
You might be able to if you talk to your TA and he/she has another discussion section at a different time. Usually TA's are cool and will understand, email him/her or talk in person!
- Sun Nov 15, 2015 5:12 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Determining Ligands
- Replies: 2
- Views: 708
Re: Determining Ligands
A ligand is any ion or molecule attached to a central metal atom
So in the compound [Fe(CN)6]4- there are 6 ligands because there 6 (CN) attached to the iron
So in the compound [Fe(CN)6]4- there are 6 ligands because there 6 (CN) attached to the iron
- Tue Nov 03, 2015 5:19 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Word problem keywords
- Replies: 1
- Views: 517
Word problem keywords
Does anyone have tips on what keywords to look for in a word problem so we know which equations to use? For example, "work function", "emits/absorbs electrons" implies the photoelectric effect. Anything like that, but for other equations.
Thanks!
Thanks!
- Wed Oct 28, 2015 9:56 am
- Forum: Hybridization
- Topic: Quiz 2 Material
- Replies: 2
- Views: 849
Re: Quiz 2 Material
I think there are some MO questions because we won't have to turn it in before the test. We turn in our workbooks right before our midterm, so we'll learn MO by then :)
- Wed Oct 28, 2015 9:42 am
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Diamagnetic Molecules
- Replies: 1
- Views: 626
Re: Diamagnetic Molecules
Take O 2 for example, it has 6 valence electrons each (12 total) but when drawing out the MO energy diagram, you notice that the \prod ^{^{*}}Px and \prod ^{*} Py bond have unpaired electrons (due to hund's rule). Although the molecule has an even number of electrons, it is still paramagnetic. It he...
- Tue Oct 20, 2015 3:15 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Ionic & Covalent Bond Characteristics
- Replies: 1
- Views: 620
Ionic & Covalent Bond Characteristics
In what ways do ionic bonds have covalent bond characteristics?
- Tue Oct 13, 2015 6:12 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Angstrom
- Replies: 1
- Views: 808
Angstrom
Hi, this is probably a really basic question, but how exactly do we measure an angstrom? and is a molecule more stable if it has a shorter or length angstrom length between its bonds?
Thanks
Thanks
- Fri Oct 09, 2015 9:59 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Chromium and Copper
- Replies: 5
- Views: 4541
Re: Chromium and Copper
I understand now, thanks for the help!
- Thu Oct 08, 2015 12:54 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Chromium and Copper
- Replies: 5
- Views: 4541
Chromium and Copper
Can someone explain why Chromium and Copper are the exceptions in electron configuration? Is there a reason why the electrons have to be in a different orbital?