Search found 25 matches

by MBouwman_4A
Sat Nov 09, 2019 5:29 pm
Forum: Lewis Structures
Topic: Drawing Lewis Structures
Replies: 17
Views: 45

Re: Drawing Lewis Structures

You should draw the Lewis structure so that the sum of the formal charges is the charge of the overall molecule, which may not necessarily be zero.
by MBouwman_4A
Sat Nov 09, 2019 5:28 pm
Forum: Lewis Structures
Topic: When to draw Resonance Structures
Replies: 14
Views: 58

Re: When to draw Resonance Structures

If the question specifically says to asks to draw resonance structures than you should do so. Otherwise, just draw the most stable Lewis Structure.
by MBouwman_4A
Sat Nov 09, 2019 5:25 pm
Forum: Lewis Structures
Topic: Formal Charges
Replies: 15
Views: 47

Re: Formal Charges

Since the central atom is usually the least electronegative, the surrounding atoms would have the charge.
by MBouwman_4A
Sat Nov 09, 2019 5:23 pm
Forum: Lewis Structures
Topic: Lewis Structures
Replies: 4
Views: 18

Re: Lewis Structures

Electrons are shifted toward the more electronegative atom, so the more electronegative atom is the one with the negative charge.
by MBouwman_4A
Sat Nov 09, 2019 5:21 pm
Forum: Lewis Structures
Topic: Midterm grades
Replies: 26
Views: 130

Re: Midterm grades

Dr. Lavelle announced that the midterms would be handed back during lecture on Wednesday (11/13).
by MBouwman_4A
Sun Oct 27, 2019 10:12 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent Bonds
Replies: 11
Views: 61

Re: Covalent Bonds

Correct, covalent bonds occur between two non-metals. This differs from the metal-nonmetal ionic bonds.
by MBouwman_4A
Sun Oct 27, 2019 10:10 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic VS. Covalent Bond
Replies: 8
Views: 18

Re: Ionic VS. Covalent Bond

Ionic bonds occur between a metal and a non-metal. Covalent bonds result from the bonding of two non-metals.
by MBouwman_4A
Sun Oct 27, 2019 10:09 pm
Forum: Ionic & Covalent Bonds
Topic: Homework
Replies: 13
Views: 69

Re: Homework

I believe you can do problems from either section. However, it might be beneficial to focus this week's homework on chemical bonds since it is a new topic.
by MBouwman_4A
Sun Oct 27, 2019 10:06 pm
Forum: DeBroglie Equation
Topic: Protons and Electrons
Replies: 4
Views: 31

Re: Protons and Electrons

Since protons and neutrons have the same mass, if they had the same velocity they would also have the same wavelength.
by MBouwman_4A
Sun Oct 27, 2019 10:04 pm
Forum: Ionic & Covalent Bonds
Topic: periodic table
Replies: 10
Views: 56

Re: periodic table

Electronegativity increases from left to right of the periodic table and decreases as you move down a group.
by MBouwman_4A
Sat Oct 19, 2019 9:00 pm
Forum: Properties of Light
Topic: Midterm Exam
Replies: 21
Views: 146

Re: Midterm Exam

The midterm should cover weeks 1-5, so fundamentals, quantum world, and chemical bonding.
by MBouwman_4A
Sat Oct 19, 2019 8:59 pm
Forum: Properties of Light
Topic: Equations and Constants
Replies: 6
Views: 40

Re: Equations and Constants

My TA said all of the equations and constants will be provided on exams (same formula sheet as Test 1).
by MBouwman_4A
Sat Oct 19, 2019 8:58 pm
Forum: Properties of Light
Topic: What are the units of hertz
Replies: 41
Views: 206

Re: What are the units of hertz

Hertz is a unit of frequency measured as cycles per second.
by MBouwman_4A
Sat Oct 19, 2019 8:56 pm
Forum: Properties of Light
Topic: Next test
Replies: 23
Views: 141

Re: Next test

Since the equation sheet given to us on the first test had many formulas and constants that we didn't need for Test 1, I'm assuming the same sheet will be used for the entire quarter for every exam.
by MBouwman_4A
Sat Oct 19, 2019 8:54 pm
Forum: Properties of Light
Topic: Unit for Wavelength
Replies: 34
Views: 122

Re: Unit for Wavelength

The standard unit for wavelength is meters (m). However it is often shown in problems as picometers (pm), nanometers (nm), or even Angstroms (A).
by MBouwman_4A
Sun Oct 13, 2019 4:25 pm
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 166
Views: 100919

Re: Rusty on High School Chem [ENDORSED]

There are so many resources provided on the class website to help brush up on high school chemistry. Especially the video modules and lectures. Reviewing topics from the textbook will also help knock the rust off.
by MBouwman_4A
Sun Oct 13, 2019 4:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student - Part II [ENDORSED]
Replies: 117
Views: 1656

Re: Advice from a Medical Student - Part II [ENDORSED]

Thank you for sharing your story! It was so helpful and provided wonderful insight. Your feedback and advice is appreciated!
by MBouwman_4A
Sun Oct 13, 2019 4:20 pm
Forum: Limiting Reactant Calculations
Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
Replies: 66
Views: 927

Re: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]

You don’t have to show as much work. However, it may help so if you make a calculating mistake, graders can see each step and you can get partial credit for completing the steps correctly even with a calculating error.
by MBouwman_4A
Sun Oct 13, 2019 4:17 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 1036

Re: Week 2 Homework Problems [ENDORSED]

Week 2 homework can be on the fundamentals or quantum world since lectures are on QW but the test during W2 is on the fundamentals. The Week 3 homework must be on the QW though.
by MBouwman_4A
Sun Oct 13, 2019 4:15 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 1835

Re: Test 1 [ENDORSED]

All of the materials for the Tests (1 & 2) and Exams (Midterm & Final) are provided. There is also a conversions/formula sheet on the first page. Also remember to have a scientific calculator instead of a graphing since graphing calculators are not allowed.
by MBouwman_4A
Fri Oct 04, 2019 5:14 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Theoretical vs. Actual Yield
Replies: 38
Views: 261

Re: Theoretical vs. Actual Yield

Theoretical yield will never be higher than actual yield. Theoretical yield is the result if the reaction is 100% efficient and there are no impurities or errors during the experiment. Theoretical yield represents the maximum yield.
by MBouwman_4A
Fri Oct 04, 2019 5:12 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 61
Views: 18433

Re: Final Jitters

I recommend not studying right before the test starts because it will make you more nervous and also psych you out on the material. I always tell myself that I’ve studied the material well and it helps me feel prepared.
by MBouwman_4A
Fri Oct 04, 2019 5:04 pm
Forum: Empirical & Molecular Formulas
Topic: When should one start rounding in a problem?
Replies: 11
Views: 67

Re: When should one start rounding in a problem?

It’s best to round at the very end of the problem once you have an answer so that you are more precise. Rounding during steps in the problem can result in errors.
by MBouwman_4A
Fri Oct 04, 2019 4:59 pm
Forum: SI Units, Unit Conversions
Topic: Question about Showing Work
Replies: 22
Views: 140

Re: Question about Showing Work

I think it’s best to show each step since graders can follow along with your work and see if you made a simple calculation error or if you didn’t apply the correct concept/formula for the problem.
by MBouwman_4A
Fri Oct 04, 2019 12:19 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 127
Views: 74988

Re: Reading the textbook [ENDORSED]

Does anyone know of some good video websites or Youtube channels that could help with explaining the introductory material? I feel like I'm more receptive to listening and visual presentations than reading lines from the textbook.

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