Search found 36 matches

by Ethan Nishikawa 4D
Tue Dec 04, 2018 9:36 am
Forum: Student Social/Study Group
Topic: Chemistry News
Replies: 32
Views: 14361

Re: Chemistry News

"Bioengineers at Rice University have combined a virus that infects moths with magnetic nanoparticles to create a potential new therapy for inherited genetic diseases like muscular dystrophy, sickle cell, cystic fibrosis, spinal muscular atrophy and some forms of cancer." Go science! https...
by Ethan Nishikawa 4D
Tue Dec 04, 2018 9:31 am
Forum: General Science Questions
Topic: how to draw a double bond that is coming at you
Replies: 6
Views: 78

Re: how to draw a double bond that is coming at you

You do not need to draw double bonds coming at you, not in this course ever. But in those cases, you would always avoid the situation by making the other bonds come at you instead of the double bond.
by Ethan Nishikawa 4D
Tue Dec 04, 2018 9:29 am
Forum: General Science Questions
Topic: Final Review
Replies: 4
Views: 78

Re: Final Review

Practicing the material on your own before attending workshops gives you a better idea of questions you could ask during OA/Workshops/ReviewSessions. You can find further practice material on Chemistry community.
by Ethan Nishikawa 4D
Mon Nov 26, 2018 6:32 pm
Forum: Hybridization
Topic: Pi bonds
Replies: 2
Views: 29

Re: Pi bonds

Sigma bonds are always the first type of bond that occurs between two elements. Pi bonds are always the additional bonds (For example the second bond in double bonds or second and third bond in triple bonds). Pi bonds do not allow rotation because if you tried to rotate the atoms, one would have to ...
by Ethan Nishikawa 4D
Mon Nov 26, 2018 6:27 pm
Forum: Dipole Moments
Topic: Intermolecular forces
Replies: 4
Views: 45

Re: Intermolecular forces

https://chemistrybytes.files.wordpress. ... -table.jpg

Check out this link^

It's a chart displaying when each intermolecular forces occurs.
by Ethan Nishikawa 4D
Mon Nov 26, 2018 6:22 pm
Forum: Ionic & Covalent Bonds
Topic: Polar Molecule
Replies: 3
Views: 62

Re: Polar Molecule

The formal charge of a molecule could be zero but still be polar. Typically, a molecule is only non-polar if there is only one type of element surrounding an atom. If there are two or more types of elements surrounding an element, the molecule will probably be polar.
by Ethan Nishikawa 4D
Tue Nov 20, 2018 7:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 2
Views: 24

VSEPR

Are we going to need to know how to find the molecular shape of molecules with more than one central atom (When the central atom A be greater than 1)?
by Ethan Nishikawa 4D
Tue Nov 20, 2018 7:24 pm
Forum: Lewis Structures
Topic: Lewis structure for POCl3
Replies: 7
Views: 57

Lewis structure for POCl3

For the Lewis Structure of POCl3, why is P in the middle?
by Ethan Nishikawa 4D
Mon Nov 19, 2018 10:51 pm
Forum: Lewis Structures
Topic: Lewis Structure of Carbon Monoxide
Replies: 3
Views: 32

Re: Lewis Structure of Carbon Monoxide

With a double bond, the molecule would have a +2 formal charge, while with a triple bond, the molecule would have +0 formal charge. Therefore, carbon monoxide needs a triple bond to be more stable.
by Ethan Nishikawa 4D
Mon Nov 19, 2018 10:44 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Importance of Molecular Shape
Replies: 2
Views: 34

Re: Importance of Molecular Shape

Molecular shape also may help you determine what type of molecular interactions occur between molecules.
by Ethan Nishikawa 4D
Mon Nov 19, 2018 10:42 pm
Forum: Dipole Moments
Topic: Dipole-Dipole Forces
Replies: 2
Views: 25

Re: Dipole-Dipole Forces

Also, a helpful way to determine if an interaction is dipole-dipole is by first figuring out the shape of each molecule.
by Ethan Nishikawa 4D
Wed Nov 14, 2018 5:07 pm
Forum: Lewis Structures
Topic: Boron Trifluoride
Replies: 8
Views: 78

Re: Boron Trifluoride

Yes boron is one of the elements that is part of the exception.
by Ethan Nishikawa 4D
Wed Nov 14, 2018 5:05 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Remembering
Replies: 8
Views: 87

Re: Remembering

Are we expected to remember all of the shapes?
by Ethan Nishikawa 4D
Wed Nov 14, 2018 4:45 pm
Forum: Bond Lengths & Energies
Topic: Bond length question
Replies: 4
Views: 46

Re: Bond length question

Also note, due to resonance, all of the bond lengths will average out to be the same length.
by Ethan Nishikawa 4D
Sun Nov 11, 2018 8:35 pm
Forum: General Science Questions
Topic: Midterm
Replies: 6
Views: 156

Re: Midterm

Thank you
by Ethan Nishikawa 4D
Sun Nov 11, 2018 8:33 pm
Forum: SI Units, Unit Conversions
Topic: pm to m
Replies: 6
Views: 117

Re: pm to m

Thank you guys
by Ethan Nishikawa 4D
Sun Nov 11, 2018 8:32 pm
Forum: Lewis Structures
Topic: Ionic compound
Replies: 4
Views: 38

Re: Ionic compound

shouldn't the brackets separate each element individually?
by Ethan Nishikawa 4D
Sun Nov 11, 2018 8:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm [ENDORSED]
Replies: 14
Views: 255

Re: Midterm [ENDORSED]

The test would be during your discussion
by Ethan Nishikawa 4D
Wed Oct 31, 2018 4:25 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 86
Views: 25222

Re: Advice from a Medical Student [ENDORSED]

This is very insightful! Thanks! In cases where you missed class, what would you do to make sure you did not fall behind? If you miss class, try to watch/listen to the Bruincast. That is the best thing you could do. Reading over the notes is good, but having Dr. Lavelle explain it takes it to a who...
by Ethan Nishikawa 4D
Wed Oct 31, 2018 4:23 pm
Forum: Octet Exceptions
Topic: Coordinate Covalent Bond
Replies: 2
Views: 36

Re: Coordinate Covalent Bond

A coordinate covalent bond is an electron covalent bond where 2 electrons derive from the same atom. Specifically, this relates to Lewis Acid-Base reactions (Group 13 elements - B, Al, etc) and how they can be stable without satisfying the octet rule. For example, BF3 is stable even though B only ha...
by Ethan Nishikawa 4D
Wed Oct 31, 2018 4:11 pm
Forum: Lewis Structures
Topic: Lewis Structures and adding multiple bonds
Replies: 2
Views: 30

Re: Lewis Structures and adding multiple bonds

Is your question more specifically about cases where compounds are stable on their own without the double/triple bonds?
by Ethan Nishikawa 4D
Wed Oct 31, 2018 4:06 pm
Forum: Octet Exceptions
Topic: Valence Electrons for Exceptions to Octets
Replies: 2
Views: 43

Re: Valence Electrons for Exceptions to Octets

Boron is in group 13 along with Aluminum. They both need 5e- to complete their octet and are apart of a class of Acid-Base reactions. Boron in BF3 only completes its octet if another atom provides both e- to form a coordinate covalent bond.
by Ethan Nishikawa 4D
Tue Oct 23, 2018 9:12 pm
Forum: SI Units, Unit Conversions
Topic: Expected to know?
Replies: 2
Views: 97

Re: Expected to know?

Ok cool thank you
by Ethan Nishikawa 4D
Tue Oct 23, 2018 9:02 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 86
Views: 25222

Re: Advice from a Medical Student [ENDORSED]

This is very insightful! Thanks! In cases where you missed class, what would you do to make sure you did not fall behind?
by Ethan Nishikawa 4D
Tue Oct 23, 2018 8:58 pm
Forum: SI Units, Unit Conversions
Topic: Expected to know?
Replies: 2
Views: 97

Expected to know?

Are we expected to know the conversion from eV to J?
by Ethan Nishikawa 4D
Wed Oct 17, 2018 10:14 am
Forum: General Science Questions
Topic: Midterm
Replies: 6
Views: 156

Re: Midterm

Ok thank you
by Ethan Nishikawa 4D
Tue Oct 16, 2018 10:26 pm
Forum: Properties of Light
Topic: Expected to know?
Replies: 6
Views: 81

Re: Expected to know?

Thanks! But dang, we need to know all the way from y-ray to radio?
by Ethan Nishikawa 4D
Tue Oct 16, 2018 10:24 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7030
Views: 772412

Re: Post All Chemistry Jokes Here

Q: Did you hear about Potassium's date with Oxygen?
A: Yeah, I heard it went OK.
by Ethan Nishikawa 4D
Tue Oct 16, 2018 10:22 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7030
Views: 772412

Re: Post All Chemistry Jokes Here

Q: Want to hear a joke about sodium, bromine, and oxygen?
A: NaBrO!
by Ethan Nishikawa 4D
Tue Oct 16, 2018 10:21 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7030
Views: 772412

Re: Post All Chemistry Jokes Here

Q: What should you do if nobody laughs at your chemistry jokes?
A: Keep telling them until you get a reaction!
by Ethan Nishikawa 4D
Tue Oct 16, 2018 10:18 pm
Forum: General Science Questions
Topic: Midterm
Replies: 6
Views: 156

Midterm

The syllabus says the midterm is 2 hours long, but discussions/lectures are no longer than 50minutes. When and where is the midterm?
by Ethan Nishikawa 4D
Tue Oct 16, 2018 10:11 pm
Forum: Properties of Light
Topic: Expected to know?
Replies: 6
Views: 81

Expected to know?

Are we supposed to remember which type of wave (visible, UV, x-ray, etc) correlates with each frequency/wavelength?
by Ethan Nishikawa 4D
Thu Oct 04, 2018 3:29 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molar Masses
Replies: 9
Views: 143

Re: Molar Masses

We will not be allowed to use graphing calculators as Lavelle said people could use them to record formulas and store functions, but we will be able to use scientific calculators.
by Ethan Nishikawa 4D
Thu Oct 04, 2018 3:27 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molar Masses
Replies: 9
Views: 143

Re: Molar Masses

Yeah we do not need to memorize the molar masses of each element, however, as we progress in this course it will be helpful to know the molar masses for some of the more basic elements such as H, O, C, etc. This will save time during tests and quizzes.
by Ethan Nishikawa 4D
Thu Oct 04, 2018 3:21 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Conversion of grams to moles
Replies: 4
Views: 51

Re: Conversion of grams to moles

Yes, the molar mass of the element needs to be multiplied by the subscript in order to find the chemical formula.

Furthermore, the subscript indicates the number of moles.
by Ethan Nishikawa 4D
Thu Oct 04, 2018 12:53 pm
Forum: SI Units, Unit Conversions
Topic: pm to m
Replies: 6
Views: 117

pm to m

Are we expected to remember the conversion of units from picometer (pm) to meters (m)?

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