Search found 18 matches

Sat Nov 10, 2018 10:21 pm
Forum: Lewis Structures
Topic: Formal charges
Replies: 15
Views: 291

Re: Formal charges

I wouldn’t necessarily write them out unless he asks for it on an exam. If you are doing it to check though, you can always do a short cut way, the equation would be number of valence electrons - sticks & dots. So the number of electrons of one element, minus the sticks and dots drawn around it....
Sat Nov 10, 2018 10:19 pm
Forum: Student Social/Study Group
Topic: curve?
Replies: 20
Views: 1249

Re: curve?

Not curved, but if you get 250/500 points, you pass with a C-
Sat Nov 10, 2018 10:18 pm
Forum: Lewis Structures
Topic: Lewis Structure
Replies: 10
Views: 250

Re: Lewis Structure

Calculate number of valence electrons. The element with the smallest amount will always be center. Add them all up to draw the dots.
Sat Nov 03, 2018 7:40 pm
Forum: Octet Exceptions
Topic: The center atom
Replies: 20
Views: 662

Re: The center atom

Typically, to draw the Lewis structure, you would need the total number of valence electrons, so what I do is write out each element’s valence electrons and the element with the smallest valence electron number is the center. Not sure how accurate my interpretation is, but that’s what I do for it.
Sat Nov 03, 2018 7:36 pm
Forum: Lewis Structures
Topic: Lewis Acids and Bases
Replies: 5
Views: 94

Re: Lewis Acids and Bases

Another tip, Lewis bases are almost always negatively charged. They can also be neutral charged.
Sat Nov 03, 2018 7:33 pm
Forum: Lewis Structures
Topic: Drawing Lewis Structures
Replies: 14
Views: 426

Re: Drawing Lewis Structures

annabel 1 1F wrote:How do we know how many resonance structures to draw?

You just draw all of the possibilities of each bond. Example, let’s say there’s two H’s and one O. One H & O have a double bond. For the second resonance structure, you would just draw the double bond on the other H instead of the first one.
Sat Oct 27, 2018 8:02 pm
Forum: Properties of Light
Topic: Photoelectric Effect
Replies: 8
Views: 294

Re: Photoelectric Effect

The photoelectric effect is a measurement of how much kinetic energy (or electrons) is released when a photon hits a metal surface. It calculates threshold and if the frequency of the photon is large enough(meaning it is larger than the threshold) to release electrons.
Sat Oct 27, 2018 7:53 pm
Forum: Properties of Light
Topic: Speed of Light
Replies: 12
Views: 292

Re: Speed of Light

If the particle has mass, it canNOT be faster than the speed of light. I believe lavelle said that in lecture.
Sat Oct 27, 2018 7:50 pm
Forum: Student Social/Study Group
Topic: Winter quarter scheduling
Replies: 6
Views: 486

Re: Winter quarter scheduling

I would recommend you do B and then BL. The 14A series is sort of meant to be a 2-year (6 quarter) series.
Thu Oct 18, 2018 7:54 pm
Forum: Properties of Light
Topic: Do I have to memorize the spectrum?
Replies: 20
Views: 491

Re: Do I have to memorize the spectrum?

I believe the spectrum will be given to us...
Thu Oct 18, 2018 7:44 pm
Forum: Photoelectric Effect
Topic: Test #2
Replies: 9
Views: 287

Re: Test #2

Everything listed under outline 2 will be on test 2 (so basically everything from the end of test 1 until now).
Thu Oct 18, 2018 7:35 pm
Forum: Photoelectric Effect
Topic: units
Replies: 12
Views: 272

Re: units

One really easy way I learned to convert nanometers back to meters is to just take the sig figs and move the decimals to multiply by 10^-7. For example, 340 nanometers would be 3.40 x 10^-7m.
Fri Oct 12, 2018 9:48 am
Forum: SI Units, Unit Conversions
Topic: Homework for Week 2
Replies: 16
Views: 366

Re: Homework for Week 2

The syllabus under Quantum only has chapter one homework questions, so I would recommend you just do those.
Fri Oct 12, 2018 9:47 am
Forum: Student Social/Study Group
Topic: Step-up program
Replies: 1
Views: 148

Re: Step-up program

It depends on who coordinates it, but you can ask homework questions and how clarification on how a certain process works.
Fri Oct 12, 2018 9:45 am
Forum: Molarity, Solutions, Dilutions
Topic: Molarity and Dilution
Replies: 10
Views: 2432

Re: Molarity and Dilution

I would use the equation Minitial x Vinital = Mfinal x Vfinal, based on the information we are given.
Thu Oct 04, 2018 9:39 pm
Forum: SI Units, Unit Conversions
Topic: How does grading for discussion posts work?
Replies: 80
Views: 2829

Re: How does grading for discussion posts work?

Do you guys know how to start a new question/topic? I can't seem to find the button for it
Thu Oct 04, 2018 9:32 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Procedure
Replies: 7
Views: 252

Re: Balancing Procedure

You cannot add "O" because you would essentially be inputting a different element that isn't actually produced in the chemical reaction. How I like to look at is that adding an extra "+ ___" is never okay.
Tue Oct 02, 2018 10:06 pm
Forum: Administrative Questions and Class Announcements
Topic: Do we have to write out the question for homework?
Replies: 4
Views: 189

Re: Do we have to write out the question for homework?

I'm writing down the entire equation for self-reference when it's time to study it again. Would highly recommend it!