Search found 18 matches

by SummerLee1F
Sat Nov 10, 2018 10:21 pm
Forum: Lewis Structures
Topic: Formal charges
Replies: 15
Views: 199

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....
by SummerLee1F
Sat Nov 10, 2018 10:19 pm
Forum: Student Social/Study Group
Topic: curve?
Replies: 20
Views: 818

Re: curve?

Not curved, but if you get 250/500 points, you pass with a C-
by SummerLee1F
Sat Nov 10, 2018 10:18 pm
Forum: Lewis Structures
Topic: Lewis Structure
Replies: 10
Views: 166

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.
by SummerLee1F
Sat Nov 03, 2018 7:40 pm
Forum: Octet Exceptions
Topic: The center atom
Replies: 20
Views: 482

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.
by SummerLee1F
Sat Nov 03, 2018 7:36 pm
Forum: Lewis Structures
Topic: Lewis Acids and Bases
Replies: 5
Views: 68

Re: Lewis Acids and Bases

Another tip, Lewis bases are almost always negatively charged. They can also be neutral charged.
by SummerLee1F
Sat Nov 03, 2018 7:33 pm
Forum: Lewis Structures
Topic: Drawing Lewis Structures
Replies: 14
Views: 297

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.
by SummerLee1F
Sat Oct 27, 2018 8:02 pm
Forum: Properties of Light
Topic: Photoelectric Effect
Replies: 8
Views: 231

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.
by SummerLee1F
Sat Oct 27, 2018 7:53 pm
Forum: Properties of Light
Topic: Speed of Light
Replies: 12
Views: 260

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.
by SummerLee1F
Sat Oct 27, 2018 7:50 pm
Forum: Student Social/Study Group
Topic: Winter quarter scheduling
Replies: 6
Views: 339

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.
by SummerLee1F
Thu Oct 18, 2018 7:54 pm
Forum: Properties of Light
Topic: Do I have to memorize the spectrum?
Replies: 20
Views: 327

Re: Do I have to memorize the spectrum?

I believe the spectrum will be given to us...
by SummerLee1F
Thu Oct 18, 2018 7:44 pm
Forum: Photoelectric Effect
Topic: Test #2
Replies: 9
Views: 224

Re: Test #2

Everything listed under outline 2 will be on test 2 (so basically everything from the end of test 1 until now).
by SummerLee1F
Thu Oct 18, 2018 7:35 pm
Forum: Photoelectric Effect
Topic: units
Replies: 12
Views: 214

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.
by SummerLee1F
Fri Oct 12, 2018 9:48 am
Forum: SI Units, Unit Conversions
Topic: Homework for Week 2
Replies: 16
Views: 297

Re: Homework for Week 2

The syllabus under Quantum only has chapter one homework questions, so I would recommend you just do those.
by SummerLee1F
Fri Oct 12, 2018 9:47 am
Forum: Student Social/Study Group
Topic: Step-up program
Replies: 1
Views: 130

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.
by SummerLee1F
Fri Oct 12, 2018 9:45 am
Forum: Molarity, Solutions, Dilutions
Topic: Molarity and Dilution
Replies: 8
Views: 1645

Re: Molarity and Dilution

I would use the equation Minitial x Vinital = Mfinal x Vfinal, based on the information we are given.
by SummerLee1F
Thu Oct 04, 2018 9:39 pm
Forum: SI Units, Unit Conversions
Topic: How does grading for discussion posts work?
Replies: 73
Views: 2105

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
by SummerLee1F
Thu Oct 04, 2018 9:32 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Procedure
Replies: 7
Views: 186

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.
by SummerLee1F
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: 143

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!

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