## Search found 25 matches

Sun Nov 03, 2019 11:20 pm
Forum: DeBroglie Equation
Topic: 1B.15 c)
Replies: 1
Views: 57

### 1B.15 c)

c) What is the wavelength of the radiation that caused photoejection of the electron?

Could i get help with this problem I keep on getting 12nm for the answer but in the book it says it's 8.8nm.
Sun Nov 03, 2019 9:39 pm
Forum: Einstein Equation
Topic: 1B.15
Replies: 3
Views: 160

### 1B.15

Sodium vapor lamps, used for public lighting, emit yellow light of wavelength 589 nm. How much energy is emitted by (a) an excited sodium atom when it generates a photon; (b) 5.00 mg of sodium atoms emitting light at this wavelength; (c) 1.00 mol of sodium atoms emitting light at this wavelength? I'...
Sun Nov 03, 2019 8:52 pm
Forum: Properties of Light
Topic: 1A.15
Replies: 3
Views: 151

### Re: 1A.15

Yes! Great start so far. From here, you would try to get \frac{1}{n_{2}^{2}} by itself by moving all other values to the other side to get: \frac{-2.922 * 10^{15}}{3.29 * 10^{15}} + 1 = \frac{1}{n_{2}^{2}} From here, you would solve the left side which is approximately: 0.11185 = \frac{1}{n_{2}^{2}...
Sun Nov 03, 2019 8:21 pm
Forum: Properties of Light
Topic: 1A.15
Replies: 3
Views: 151

### 1A.15

In the ultraviolet spectrum of atomic hydrogen, a line is observed at 102.6 nm. Determine the values of n for the initial and final energy levels of the electron during the emission of energy that leads to this spectral line. I got 2.9x10^15=3.28x10^15{1/1^2-1/n^2} (is this right?) I understand that...
Sun Nov 03, 2019 6:41 pm
Forum: Properties of Electrons
Topic: Photoelectric effect
Replies: 5
Views: 238

### Photoelectric effect

Are there any videos anyone recommends for the photoelectric effect?
Sun Oct 27, 2019 11:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 2
Views: 33

### Re: Midterm

Yes the most likely will be.
Sun Oct 27, 2019 11:26 pm
Forum: Student Social/Study Group
Topic: Midterm Length
Replies: 7
Views: 137

### Re: Midterm Length

Naneeta_Desar_1K wrote:Where will be taking the midterm? The same lecture hall as class?

He will most likely send an email on where the exam will be. But I also believe it is posted in the section of test and exam dates.
Sun Oct 27, 2019 11:21 pm
Forum: Student Social/Study Group
Topic: Study Tips
Replies: 58
Views: 2150

### Re: Study Tips

Does anyone have any advice on how to take really good notes during lecture? I usually copy the slides but I always feel like he says some important things, I just never catch them on time since I'm too busying copying what the slides say I would say you should try to listen more to his lecturing b...
Sun Oct 27, 2019 11:17 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 11
Views: 154

### Re: Midterm

Merin Padayatty 3G wrote:Will the midterm cover the chemical bond section?

Yes I believe the midterm will be covering the chemical bond section.
Thu Oct 24, 2019 1:58 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: 1E.13
Replies: 2
Views: 45

### 1E.13

Write the ground-state electron configuration for each of the following atoms: (a) silver; (b) beryllium; (c) antimony; (d) gallium; (e) tungsten; (f) iodine.
Sun Oct 20, 2019 10:20 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 11
Views: 154

### Re: Midterm

605136321 wrote:Does anyone know when the midterm will be and what the layout/structure of it will be like (how many questions, what topics etc)?

The midterm will be on November 6. As for the layout I'm assuming it's going to be free response similar to test 1, just longer.
Sun Oct 20, 2019 10:07 pm
Forum: Properties of Light
Topic: 1F.19
Replies: 5
Views: 63

### 1F.19

Why are s-block metals typically more reactive than p-block metals?
Sun Oct 20, 2019 8:15 pm
Forum: Student Social/Study Group
Topic: Lecture on friday
Replies: 4
Views: 80

### Re: Lecture on friday

Elizabeth 4I wrote:What is your email? I can send you the notes if you'd like

Its margaritaolvera13@gmail.com. Thank you!
Sun Oct 20, 2019 8:14 pm
Forum: Properties of Light
Topic: Homework 4
Replies: 4
Views: 81

### Homework 4

I'm confused, are we still doing the problems from the quantum world section for Hw 4?
Sun Oct 20, 2019 6:15 pm
Forum: Student Social/Study Group
Topic: Lecture on friday
Replies: 4
Views: 80

### Lecture on friday

I was unable to attend lecture on Friday can someone give me a brief overview of what was discussed please.
Sun Oct 13, 2019 11:56 pm
Forum: Student Social/Study Group
Topic: Places to study
Replies: 3
Views: 77

### Places to study

Hi, does anyone know of any good off campus spots to study at?
Sun Oct 13, 2019 11:52 pm
Forum: Student Social/Study Group
Topic: Study Tips
Replies: 58
Views: 2150

### Re: Study Tips

Does anyone have any good advice for studying for this class besides practice problems? Right now I simply read the textbook and work on problems, but I haven't taken chemistry since my freshmen year of high school, so I am not exactly sure how well I know the material. If there are any tips or adv...
Sun Oct 13, 2019 11:49 pm
Forum: Properties of Light
Topic: 1A.15
Replies: 4
Views: 103

### 1A.15

In the ultraviolet spectrum of atomic hydrogen, a line is observed at 102.6 nm. Determine the values of n for the initial and final energy levels of the electron during the emission of energy that leads to this spectral line.

Can I get help with this question?
Sun Oct 13, 2019 11:41 pm
Forum: SI Units, Unit Conversions
Topic: Test 1
Replies: 2
Views: 77

### Test 1

Does anyone know when we will get our test back?
Tue Oct 08, 2019 4:56 pm
Forum: Limiting Reactant Calculations
Topic: Theoretical yield
Replies: 5
Views: 146

### Theoretical yield

Based on the molar ratios in a balanced chemical equation a student expects 0.20 moles of product. If the molar mass of the product is 81 g.mol-1 what is the theoretical yield?

Can someone please show the steps for this problem.
Sun Oct 06, 2019 8:56 pm
Forum: SI Units, Unit Conversions
Topic: Unit Conversions
Replies: 6
Views: 137

### Re: Unit Conversions

Do we need to memorize all of the different prefixes(giga, kilo, nano, ect.)? Or will it be given to us on a test? If so do u have any easy ways to memorize them? Thanks. I would suggest to at least memorize the more common ones such as kilo, milli, and nano. However, memorizing all of them would a...
Wed Oct 02, 2019 9:05 pm
Forum: SI Units, Unit Conversions
Topic: How does grading for discussion posts work?
Replies: 80
Views: 3813

### Re: How does grading for discussion posts work?

This is totally unrelated to this topic, but how do you post your own question with a topic on this website? I've been trying to figure it out but I can't seem to do it.
Wed Oct 02, 2019 8:22 pm
Forum: Molarity, Solutions, Dilutions
Topic: Unit Conversion for Molarity/Dilution
Replies: 3
Views: 37

### Re: Unit Conversion for Molarity/Dilution

When you're solving a problem that has the mL unit do you convert the mL to L before you begin to do the work or do you do it after you've solved the problem? Does it matter? Yes, if the question asks for the answer to be in Liters. Most of the time it will tell you if it does want it in liters. Bu...
Wed Oct 02, 2019 8:19 pm
Forum: SI Units, Unit Conversions
Topic: How does grading for discussion posts work?
Replies: 80
Views: 3813

### Re: How does grading for discussion posts work?

LG2019 wrote:Are our posts due by Friday or Sunday, typically?

Professor Lavelle said Sunday.
Wed Oct 02, 2019 8:17 pm
Forum: SI Units, Unit Conversions
Topic: How does grading for discussion posts work?
Replies: 80
Views: 3813

### Re: How does grading for discussion posts work?

I heard professor Lavelle say you had to post either questions or answers five times a week to receive the full five points.