Search found 9 matches

by AmandaRae
Sun Jul 30, 2017 5:56 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Relationship between pKa and pKb
Replies: 2
Views: 173

Relationship between pKa and pKb

Is this the correct relationship?


higher (kA) = lower (pKa) = stronger acid --> and this relationship holds true for bases as well?
by AmandaRae
Mon Jul 24, 2017 9:52 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: When do you calculate Q prior to calculating concentrations?
Replies: 2
Views: 289

When do you calculate Q prior to calculating concentrations?

My question is, when do you calculate Q for a problem determining the direction of the reaction? For example, problem 67. Why in this particular problem did we find Q first and not just proceed into the ICE box as we normally would? A 3.00l reaction vessel is filled with 0.342 mol CO, .215 mol H2, 0...
by AmandaRae
Mon Jul 17, 2017 11:15 pm
Forum: Ionic & Covalent Bonds
Topic: Atoms and their Formal Charge
Replies: 1
Views: 172

Atoms and their Formal Charge

Which atoms are more stable carrying a certain charge? Specifically which atoms are better off carrying a negative charge over a positive charge and vice versa etc.? Furthermore, just for verification, you would much rather have a molecule carry a formal charge of zero (for stability reasons) than c...
by AmandaRae
Sun Jul 09, 2017 9:16 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Quantum numbers are atomic orbitals
Replies: 1
Views: 182

Quantum numbers are atomic orbitals

What exactly does (ml) tell you?? I know that by definition it is the magnetic quantum number and labels different orbitals of a sub-shell orientation, but I'm not quite sure what that means. If the ml= +5, what does that mean??

Thank you (:
by AmandaRae
Sat Jul 08, 2017 10:07 am
Forum: General Science Questions
Topic: Material Covered on Midterm 1
Replies: 2
Views: 540

Re: Material Covered on Midterm 1

Thank you!!!
by AmandaRae
Sat Jul 08, 2017 9:12 am
Forum: General Science Questions
Topic: Material Covered on Midterm 1
Replies: 2
Views: 540

Material Covered on Midterm 1

I just have a quick question as to what topics will be covered on the Wednesday midterm. I know it is fundamentals, CH1, CH2, but I have an older edition of the book and chapter 2 is Chemical Bonds, and in the course reader Chemical Bonds is chapter 3. I guess my main question is are the topics that...
by AmandaRae
Sun Jul 02, 2017 10:33 am
Forum: SI Units, Unit Conversions
Topic: Dimensional Analysis/ Unit conversion [ENDORSED]
Replies: 5
Views: 487

Dimensional Analysis/ Unit conversion [ENDORSED]

I know there are a lot of posts on here about unit conversions, but I'm having a problem specifically with long dimensional analysis. Is there a need to do all of the conversions in one giant step, does it make it easier to visualize? I tend to break it up into smaller steps, which in the long run t...
by AmandaRae
Fri Jun 30, 2017 6:25 pm
Forum: Properties of Light
Topic: Chapter 1 Number 19 [ENDORSED]
Replies: 2
Views: 252

Chapter 1 Number 19 [ENDORSED]

Sodium vapor lamps, used for public lighting emit yellow light of wavelength 589nm. a.) How much energy is emitted by an excited sodium atom when it generates a photon? b.) 5.00mg of sodium atoms emitting light at this wavelength c.) 1.00 mol of sodium atoms emitting light at this wavelength? I unde...

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