Search found 21 matches

by Joanne Reyes 1L
Tue Mar 08, 2016 10:08 pm
Forum: *Alcohols
Topic: Naming Conventions
Replies: 1
Views: 296

Re: Naming Conventions

yes, I think both names are correct answers and considered the same
by Joanne Reyes 1L
Tue Mar 01, 2016 11:52 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1122128

Re: Chemistry Jokes

What substance has the formula HIJKLMNO? Water
hehe
by Joanne Reyes 1L
Fri Feb 26, 2016 12:37 am
Forum: *Alkanes
Topic: Alphabetizing when naming
Replies: 1
Views: 217

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?
by Joanne Reyes 1L
Sun Feb 21, 2016 2:39 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1122128

Re: Chemistry Jokes

What is the name of the molecule CH2O?


A: Seawater
by Joanne Reyes 1L
Tue Feb 09, 2016 1:34 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1122128

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.
by Joanne Reyes 1L
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: 393

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?
by Joanne Reyes 1L
Sun Jan 31, 2016 10:55 pm
Forum: Phase Changes & Related Calculations
Topic: Unable to watch podcasts
Replies: 1
Views: 281

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
by Joanne Reyes 1L
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: 903

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.
by Joanne Reyes 1L
Sun Jan 17, 2016 11:41 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isothermal
Replies: 1
Views: 320

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.
by Joanne Reyes 1L
Sun Jan 10, 2016 2:25 pm
Forum: Calculating Work of Expansion
Topic: Reversible and irreversible process
Replies: 2
Views: 380

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
by Joanne Reyes 1L
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: 399

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.
by Joanne Reyes 1L
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: 468

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
by Joanne Reyes 1L
Tue Nov 17, 2015 5:21 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 question?
Replies: 1
Views: 541

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!
by Joanne Reyes 1L
Sun Nov 15, 2015 5:12 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Determining Ligands
Replies: 2
Views: 510

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
by Joanne Reyes 1L
Tue Nov 03, 2015 5:19 pm
Forum: Quantum Numbers and The H-Atom
Topic: Word problem keywords
Replies: 1
Views: 382

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!
by Joanne Reyes 1L
Wed Oct 28, 2015 9:56 am
Forum: Hybridization
Topic: Quiz 2 Material
Replies: 2
Views: 536

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 :)
by Joanne Reyes 1L
Wed Oct 28, 2015 9:42 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Diamagnetic Molecules
Replies: 1
Views: 324

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...
by Joanne Reyes 1L
Tue Oct 20, 2015 3:15 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Ionic & Covalent Bond Characteristics
Replies: 1
Views: 388

Ionic & Covalent Bond Characteristics

In what ways do ionic bonds have covalent bond characteristics?
by Joanne Reyes 1L
Tue Oct 13, 2015 6:12 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Angstrom
Replies: 1
Views: 339

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
by Joanne Reyes 1L
Fri Oct 09, 2015 9:59 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Chromium and Copper
Replies: 5
Views: 1330

Re: Chromium and Copper

I understand now, thanks for the help!
by Joanne Reyes 1L
Thu Oct 08, 2015 12:54 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Chromium and Copper
Replies: 5
Views: 1330

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?

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