Search found 19 matches

by Raquel Floyd 1K
Mon Jun 11, 2018 11:51 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: BeCl2 formal charge vs octet rule
Replies: 2
Views: 225

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.
by Raquel Floyd 1K
Wed Jun 06, 2018 5:56 pm
Forum: Resonance Structures
Topic: Radicals
Replies: 13
Views: 598

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...
by Raquel Floyd 1K
Wed Jun 06, 2018 5:44 pm
Forum: Resonance Structures
Topic: How to tell when an molecule is resonant?
Replies: 7
Views: 317

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...
by Raquel Floyd 1K
Tue Jun 05, 2018 2:25 pm
Forum: Hybridization
Topic: Hybrid orbitals
Replies: 6
Views: 229

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.
by Raquel Floyd 1K
Tue Jun 05, 2018 2:23 pm
Forum: Hybridization
Topic: strength of sigma and pi bonds
Replies: 10
Views: 374

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.
by Raquel Floyd 1K
Tue Jun 05, 2018 2:21 pm
Forum: Hybridization
Topic: VSEPR
Replies: 11
Views: 496

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?
by Raquel Floyd 1K
Tue Jun 05, 2018 2:18 pm
Forum: Hybridization
Topic: Hybrid Orbitals
Replies: 5
Views: 205

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.
by Raquel Floyd 1K
Tue Jun 05, 2018 2:16 pm
Forum: Hybridization
Topic: Energy levels
Replies: 6
Views: 259

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...
by Raquel Floyd 1K
Fri Jun 01, 2018 10:44 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Telling Bond Angles
Replies: 1
Views: 59

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?
by Raquel Floyd 1K
Fri Jun 01, 2018 10:37 am
Forum: Resonance Structures
Topic: Resonance Structures
Replies: 9
Views: 407

Re: Resonance Structures

So can a molecule still "have resonance" even if there is one structure that is the most stable form of it?
by Raquel Floyd 1K
Fri Jun 01, 2018 10:34 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Atoms with Resonance vs Atoms without
Replies: 1
Views: 71

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...
by Raquel Floyd 1K
Mon May 21, 2018 12:00 pm
Forum: Sigma & Pi Bonds
Topic: Sigma Bonds
Replies: 5
Views: 228

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...
by Raquel Floyd 1K
Fri May 11, 2018 11:53 am
Forum: SI Units, Unit Conversions
Topic: units
Replies: 4
Views: 279

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.
by Raquel Floyd 1K
Fri May 11, 2018 11:41 am
Forum: Properties of Light
Topic: Diffraction Patterns
Replies: 3
Views: 225

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
by Raquel Floyd 1K
Wed Apr 18, 2018 5:53 pm
Forum: Properties of Light
Topic: HW 1.3 [ENDORSED]
Replies: 12
Views: 444

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?
by Raquel Floyd 1K
Fri Apr 06, 2018 1:43 pm
Forum: Significant Figures
Topic: All students read this sig fig post [ENDORSED]
Replies: 114
Views: 9979

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?
by Raquel Floyd 1K
Fri Apr 06, 2018 1:33 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant
Replies: 9
Views: 423

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?
by Raquel Floyd 1K
Thu Apr 05, 2018 12:03 pm
Forum: Balancing Chemical Reactions
Topic: Net Number of moles produced [ENDORSED]
Replies: 3
Views: 290

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 ...
by Raquel Floyd 1K
Thu Oct 20, 2016 9:51 pm
Forum: Administrative Questions and Class Announcements
Topic: Peer Facilitated Learning Sessions
Replies: 32
Views: 11171

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?

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