Search found 36 matches
- Tue Dec 04, 2018 9:36 am
- Forum: Student Social/Study Group
- Topic: Chemistry News
- Replies: 135
- Views: 164687
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...
- 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: 923
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.
- Tue Dec 04, 2018 9:29 am
- Forum: General Science Questions
- Topic: Final Review
- Replies: 4
- Views: 691
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.
- Mon Nov 26, 2018 6:32 pm
- Forum: Hybridization
- Topic: Pi bonds
- Replies: 2
- Views: 395
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 ...
- Mon Nov 26, 2018 6:27 pm
- Forum: Dipole Moments
- Topic: Intermolecular forces
- Replies: 4
- Views: 599
Re: Intermolecular forces
https://chemistrybytes.files.wordpress. ... -table.jpg
Check out this link^
It's a chart displaying when each intermolecular forces occurs.
Check out this link^
It's a chart displaying when each intermolecular forces occurs.
- Mon Nov 26, 2018 6:22 pm
- Forum: Ionic & Covalent Bonds
- Topic: Polar Molecule
- Replies: 3
- Views: 1067
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.
- Tue Nov 20, 2018 7:31 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR
- Replies: 2
- Views: 335
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)?
- Tue Nov 20, 2018 7:24 pm
- Forum: Lewis Structures
- Topic: Lewis structure for POCl3
- Replies: 7
- Views: 1343
Lewis structure for POCl3
For the Lewis Structure of POCl3, why is P in the middle?
- Mon Nov 19, 2018 10:51 pm
- Forum: Lewis Structures
- Topic: Lewis Structure of Carbon Monoxide
- Replies: 3
- Views: 447
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.
- Mon Nov 19, 2018 10:44 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Importance of Molecular Shape
- Replies: 2
- Views: 359
Re: Importance of Molecular Shape
Molecular shape also may help you determine what type of molecular interactions occur between molecules.
- Mon Nov 19, 2018 10:42 pm
- Forum: Dipole Moments
- Topic: Dipole-Dipole Forces
- Replies: 2
- Views: 314
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.
- Wed Nov 14, 2018 5:07 pm
- Forum: Lewis Structures
- Topic: Boron Trifluoride
- Replies: 8
- Views: 806
Re: Boron Trifluoride
Yes boron is one of the elements that is part of the exception.
- Wed Nov 14, 2018 5:05 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Remembering
- Replies: 8
- Views: 819
Re: Remembering
Are we expected to remember all of the shapes?
- Wed Nov 14, 2018 4:45 pm
- Forum: Bond Lengths & Energies
- Topic: Bond length question
- Replies: 4
- Views: 542
Re: Bond length question
Also note, due to resonance, all of the bond lengths will average out to be the same length.
- Sun Nov 11, 2018 8:35 pm
- Forum: General Science Questions
- Topic: Midterm
- Replies: 6
- Views: 766
Re: Midterm
Thank you
- Sun Nov 11, 2018 8:33 pm
- Forum: SI Units, Unit Conversions
- Topic: pm to m
- Replies: 6
- Views: 901
Re: pm to m
Thank you guys
- Sun Nov 11, 2018 8:32 pm
- Forum: Lewis Structures
- Topic: Ionic compound
- Replies: 4
- Views: 498
Re: Ionic compound
shouldn't the brackets separate each element individually?
- Sun Nov 11, 2018 8:31 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm [ENDORSED]
- Replies: 14
- Views: 1523
Re: Midterm [ENDORSED]
The test would be during your discussion
- Wed Oct 31, 2018 5:25 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 384852
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...
- Wed Oct 31, 2018 5:23 pm
- Forum: Octet Exceptions
- Topic: Coordinate Covalent Bond
- Replies: 2
- Views: 334
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...
- Wed Oct 31, 2018 5:11 pm
- Forum: Lewis Structures
- Topic: Lewis Structures and adding multiple bonds
- Replies: 2
- Views: 295
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?
- Wed Oct 31, 2018 5:06 pm
- Forum: Octet Exceptions
- Topic: Valence Electrons for Exceptions to Octets
- Replies: 2
- Views: 424
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.
- Tue Oct 23, 2018 10:12 pm
- Forum: SI Units, Unit Conversions
- Topic: Expected to know?
- Replies: 2
- Views: 380
Re: Expected to know?
Ok cool thank you
- Tue Oct 23, 2018 10:02 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 384852
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?
- Tue Oct 23, 2018 9:58 pm
- Forum: SI Units, Unit Conversions
- Topic: Expected to know?
- Replies: 2
- Views: 380
Expected to know?
Are we expected to know the conversion from eV to J?
- Wed Oct 17, 2018 11:14 am
- Forum: General Science Questions
- Topic: Midterm
- Replies: 6
- Views: 766
Re: Midterm
Ok thank you
- Tue Oct 16, 2018 11:26 pm
- Forum: Properties of Light
- Topic: Expected to know?
- Replies: 6
- Views: 670
Re: Expected to know?
Thanks! But dang, we need to know all the way from y-ray to radio?
- Tue Oct 16, 2018 11:24 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3041460
Re: Post All Chemistry Jokes Here
Q: Did you hear about Potassium's date with Oxygen?
A: Yeah, I heard it went OK.
A: Yeah, I heard it went OK.
- Tue Oct 16, 2018 11:22 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3041460
Re: Post All Chemistry Jokes Here
Q: Want to hear a joke about sodium, bromine, and oxygen?
A: NaBrO!
A: NaBrO!
- Tue Oct 16, 2018 11:21 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3041460
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!
A: Keep telling them until you get a reaction!
- Tue Oct 16, 2018 11:18 pm
- Forum: General Science Questions
- Topic: Midterm
- Replies: 6
- Views: 766
Midterm
The syllabus says the midterm is 2 hours long, but discussions/lectures are no longer than 50minutes. When and where is the midterm?
- Tue Oct 16, 2018 11:11 pm
- Forum: Properties of Light
- Topic: Expected to know?
- Replies: 6
- Views: 670
Expected to know?
Are we supposed to remember which type of wave (visible, UV, x-ray, etc) correlates with each frequency/wavelength?
- Thu Oct 04, 2018 4:29 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Molar Masses
- Replies: 9
- Views: 556
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.
- Thu Oct 04, 2018 4:27 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Molar Masses
- Replies: 9
- Views: 556
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.
- Thu Oct 04, 2018 4:21 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Conversion of grams to moles
- Replies: 4
- Views: 417
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.
Furthermore, the subscript indicates the number of moles.
- Thu Oct 04, 2018 1:53 pm
- Forum: SI Units, Unit Conversions
- Topic: pm to m
- Replies: 6
- Views: 901
pm to m
Are we expected to remember the conversion of units from picometer (pm) to meters (m)?