## Search found 18 matches

Sun Dec 10, 2017 10:51 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Acids and Bases [ENDORSED]
Replies: 1
Views: 354

### Acids and Bases[ENDORSED]

Ka and Kb are only considered primarily when referring to weak acids and bases, right?
Sun Dec 10, 2017 10:47 pm
Forum: SI Units, Unit Conversions
Topic: Approximations [ENDORSED]
Replies: 1
Views: 309

### Approximations[ENDORSED]

Just for clarification, every time we use approximations, like in terms of determining pH, we have to justify it right?
Sun Dec 03, 2017 11:50 pm
Forum: Sigma & Pi Bonds
Topic: Pi bonds
Replies: 3
Views: 388

### Pi bonds

Just to clarify, the pi bonds in double and triple bonds are from unhybridized orbitals, right?
Sun Dec 03, 2017 11:48 pm
Forum: Resonance Structures
Topic: Naming coordination compounds [ENDORSED]
Replies: 3
Views: 379

### Naming coordination compounds[ENDORSED]

Can the use of “chloro” be interchangeable with “chlorido”?
Sun Nov 26, 2017 9:24 pm
Forum: Ideal Gases
Topic: Conversions- Gases
Replies: 3
Views: 331

### Conversions- Gases

For the upcoming exams, will we have to know how to convert between various units of pressure?
Sun Nov 26, 2017 9:22 pm
Forum: Ideal Gases
Topic: Problem 11.37 [ENDORSED]
Replies: 3
Views: 389

### Problem 11.37[ENDORSED]

For the reaction N2(g) + 3H2 (g) === 2 NH3(g) at 400.K, K = 41. Find the value of K for each of the following reactions at the same temperature:
B) 1/2 N2(g) + 3/2H2(g) ==== NH3 (g)
Sun Nov 19, 2017 9:01 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Naming; VSEPR
Replies: 3
Views: 322

### Naming; VSEPR

I'm sorry, I understand that the sulfite ion has the shape of trigonal pyramidal, but can someone please explain why it is denoted as AX^5?

Thank you
Sun Nov 19, 2017 8:40 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 3
Views: 296

### VSEPR

In VSEPR model, since single, double, and triple bonds are considered equivalent regions of high e- density, does resonance really matter?
Sun Nov 12, 2017 1:09 am
Forum: Ionic & Covalent Bonds
Topic: Bond Strength
Replies: 1
Views: 212

### Bond Strength

When comparing bond strength, I understand that multiplicity plays a role.. so when you have molecules B2^2- vs B2 and B2^+, the anion would have the shortest bond length because of that, right? and therefore, would be the strongest?
Sun Nov 12, 2017 1:03 am
Forum: Determining Molecular Shape (VSEPR)
Topic: When to Use Radicals [ENDORSED]
Replies: 2
Views: 241

Hi! I just want to clarify... if a compound contains a radical, would it be placed on the more electronegative atom?
Fri Nov 03, 2017 8:24 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Valence Shell Electron Configuration
Replies: 2
Views: 1116

### Valence Shell Electron Configuration

I don't really understand how to give the notation for the valence-shell configuration of
c) Group 5 transition metals
d) "coinage" metals (Cu, Ag, Au)

Thank you
Fri Nov 03, 2017 8:20 pm
Forum: Quantum Numbers and The H-Atom
Topic: Angular Momentum Quantum Number
Replies: 1
Views: 249

### Angular Momentum Quantum Number

I understand that l = n-1. So let's say that the principal energy level of an atom is 5, that means that there can be 5 different values of l in terms of subshells from 0-4; so the 4 is equivalent to a g-subshell, right? What does that mean?

Thank you
Fri Oct 27, 2017 12:51 pm
Forum: Significant Figures
Topic: Schrodinger's Equation [ENDORSED]
Replies: 1
Views: 221

### Schrodinger's Equation[ENDORSED]

Do we just need to understand this equation conceptually, or will we have actually use it to solve problems on our midterm?

Thank you
Fri Oct 27, 2017 12:48 pm
Forum: Significant Figures
Topic: How to solve #18 Post-Assessment [ENDORSED]
Replies: 1
Views: 264

### How to solve #18 Post-Assessment[ENDORSED]

The hydrogen atom has a radius of approximately 0.05 nm. Assume that we know the position of an electron to an accuracy of 1 % of the hydrogen radius, calculate the uncertainty in the speed of the electron using the Heisenberg uncertainty principle.

Thank you
Sat Oct 21, 2017 9:35 pm
Forum: Properties of Light
Topic: Photoelectric Effect Post-module Question
Replies: 2
Views: 534

### Photoelectric Effect Post-module Question

Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 105 m.s-1. The work function for sodium is 150.6 kJ.mol-1.

What is the frequency of the incident light on the metal surface?
Thu Oct 19, 2017 5:07 am
Forum: *Shrodinger Equation
Topic: Homework Problems
Replies: 1
Views: 203

### Homework Problems

Just for clarification, is the homework that is due in our discussion section the questions from Chapter 2?

Thank you
Fri Oct 13, 2017 4:56 pm
Forum: Photoelectric Effect
Topic: Balmer vs Lyman [ENDORSED]
Replies: 5
Views: 473

### Balmer vs Lyman[ENDORSED]

For the exam, do we need to memorize the various wavelengths of light that correspond to each series?
Fri Oct 13, 2017 4:49 pm
Forum: Photoelectric Effect
Topic: Post Assessment #28 [ENDORSED]
Replies: 4
Views: 391

### Post Assessment #28[ENDORSED]

Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 10^5 m.s^-1. The work function for sodium is 150.6 kJ.mol^-1. How much energy is required to remove an electron from one sodium atom? Isn't the energy required to remove the electron equivalent to the work function/...