Search found 19 matches
- Mon Jun 11, 2018 11:51 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: BeCl2 formal charge vs octet rule
- Replies: 2
- Views: 895
BeCl2 formal charge vs octet rule
When determining the dot structure, is formal charge or the octet rule more "important"? For example, BeCl2. To make the formal charge zero, the Be would not fulfill the octet rule, as it would only have 2 single bonds.
- Wed Jun 06, 2018 5:56 pm
- Forum: Resonance Structures
- Topic: Radicals
- Replies: 13
- Views: 1429
Re: Radicals
The way to tell that something is a radical is that it will only have a lone electron (as stated above). How it affects formal charge is now you have an odd number of electrons. Say you have nitrogen (which wants 5 electrons) and it is bonded to some other element, has a lone pair, and a single elec...
- Wed Jun 06, 2018 5:44 pm
- Forum: Resonance Structures
- Topic: How to tell when an molecule is resonant?
- Replies: 7
- Views: 1598
Re: How to tell when an molecule is resonant?
A molecule has resonance when the electrons can not be expressed by just one lewis structure. If there are multiple ways you can draw it, then it has resonance. If you draw a lewis structure, and then simply turn your page so the molecule is oriented differently, that is not resonance. That would be...
- Tue Jun 05, 2018 2:25 pm
- Forum: Hybridization
- Topic: Hybrid orbitals
- Replies: 6
- Views: 745
Re: Hybrid orbitals
The hybridized energy level becomes between the original energy levels. I am not sure if we are excepted to know how to find what the exact energy level value of the hybridized molecule.
- Tue Jun 05, 2018 2:23 pm
- Forum: Hybridization
- Topic: strength of sigma and pi bonds
- Replies: 10
- Views: 1265
Re: strength of sigma and pi bonds
Whenever a bond breaks that is then classified as a chemical reaction. So if a pi bond breaks, the molecule has then undergone a chemical reaction.
- Tue Jun 05, 2018 2:21 pm
- Forum: Hybridization
- Topic: VSEPR
- Replies: 11
- Views: 1491
Re: VSEPR
Cameron Smith 1I wrote:Howndo we determine the arrangement of electrons based on the regions of electron density?
Cameron, do you mean how do we find the shape?
- Tue Jun 05, 2018 2:18 pm
- Forum: Hybridization
- Topic: Hybrid Orbitals
- Replies: 5
- Views: 666
Re: Hybrid Orbitals
I would assume it would be the same as the electron configurations. We are mostly focused on elements involved in organic molecules, therefore we will mostly stick to the first few rows of the D block, because anything after that gets more toxic/unstable to be used in organic systems.
- Tue Jun 05, 2018 2:16 pm
- Forum: Hybridization
- Topic: Energy levels
- Replies: 6
- Views: 747
Re: Energy levels
Wouldn't the energy levels get a bit mixed up anyways, and we haven't been taught how to find what the hybridized energy level would be? I remember talking about how after hybridizing something, the new energy level is then somewhere in between the two. That is why when we are drawing out the diagra...
- Fri Jun 01, 2018 10:44 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Telling Bond Angles
- Replies: 1
- Views: 268
Telling Bond Angles
When asked to find the degree of a bond angle, do the specific order/atoms involved need to be specified to be able to answer? Or would it be assumed to just list all of the different bond angles involved in the molecule?
- Fri Jun 01, 2018 10:37 am
- Forum: Resonance Structures
- Topic: Resonance Structures
- Replies: 9
- Views: 1111
Re: Resonance Structures
So can a molecule still "have resonance" even if there is one structure that is the most stable form of it?
- Fri Jun 01, 2018 10:34 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Atoms with Resonance vs Atoms without
- Replies: 1
- Views: 264
Atoms with Resonance vs Atoms without
In lecture last Wednesday, we did an example with determining the shape of a carbonate ion, (CO 3 ) 2- . It was determined that because the ion has resonance, the bond is de-localized, and has a shared bond of 1.33 (because there is one double bonds and two single bonds). Because of this shared bond...
- Mon May 21, 2018 12:00 pm
- Forum: Sigma & Pi Bonds
- Topic: Sigma Bonds
- Replies: 5
- Views: 644
Re: Sigma Bonds
To my understanding, the statement "for the extent of the overlap to be maximum" means that in these bonds, the overlap is the greatest overlap compared to any other bonds. And because there is so much overlap going on, that is what makes these bonds stronger. I hope by putting it in layma...
- Fri May 11, 2018 11:53 am
- Forum: SI Units, Unit Conversions
- Topic: units
- Replies: 4
- Views: 638
Re: units
The reason you would want kg for mass is because it cancels out units when dealing with joules. This is because 1J = 1(kg * m^2)/(s^2). So when dealing with the formula that gives kinetic energy, if your mass is in kg, it will cancel with the 1(kg * m^2)/(s^2) found from the joules.
- Fri May 11, 2018 11:41 am
- Forum: Properties of Light
- Topic: Diffraction Patterns
- Replies: 3
- Views: 780
Re: Diffraction Patterns
While reviewing, I found the whole first three sections on khan academy "quantum physics" very helpful. Here is a video that explains the experiment that shows defraction patterns https://youtu.be/iTRxuBxttj8
- Wed Apr 18, 2018 5:53 pm
- Forum: Properties of Light
- Topic: HW 1.3 [ENDORSED]
- Replies: 12
- Views: 1606
Re: HW 1.3 [ENDORSED]
To follow up on the answers given above, how do you find the slope of the wave? Is this taken from the maximum (or minimum) point to the middle line?
- Fri Apr 06, 2018 1:43 pm
- Forum: Significant Figures
- Topic: All students read this sig fig post [ENDORSED]
- Replies: 170
- Views: 33507
Re: All students read this sig fig post [ENDORSED]
Do we know how we will be graded with sig figs on the homework? I understand it would be good practice to make sure that we have the correct sig figs on the homework for the test, but when the TA's are grading the homeworks, will we be docked if we have not used the proper amount of sig figs?
- Fri Apr 06, 2018 1:33 pm
- Forum: Limiting Reactant Calculations
- Topic: Limiting Reactant
- Replies: 9
- Views: 2969
Re: Limiting Reactant
Could someone explain in more detail the "comparing" part of these steps? I do not understand what you do after you have the two different ratios, how do you compare them to know which is your limiting reagent?
- Thu Apr 05, 2018 12:03 pm
- Forum: Balancing Chemical Reactions
- Topic: Net Number of moles produced [ENDORSED]
- Replies: 3
- Views: 718
Re: Net Number of moles produced [ENDORSED]
So given this example problem (taken from the post-assessment on balancing equations): "During a summer camping weekend 4 moles of butane (C 4 H 10 ) gas were used for cooking. Chose the right balanced equation for the combustion of 4 moles of butane gas. What is the net number of moles of gas ...
- Thu Oct 20, 2016 9:51 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Peer Facilitated Learning Sessions
- Replies: 32
- Views: 13315
Re: Peer Facilitated Learning Sessions
Are they strict on what time we attend? Or as long as we are not disruptive is it fine to come late/leave early for certain sessions?