Search found 8 matches
- Sun Nov 29, 2015 11:55 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 4.19 Predict shape of molecule
- Replies: 2
- Views: 1282
Re: 4.19 Predict shape of molecule
Draw the lewis structure and then determine how many regions of electron density are around the central atom, whether that be in bonds or lone pairs. You can then determine the AXE of the molecule, where X is the number of bonding pairs of electrons and E is the number of bonding pair. The result of...
- Sun Nov 29, 2015 6:07 pm
- Forum: Limiting Reactant Calculations
- Topic: Video: Limiting Reactant
- Replies: 1
- Views: 529
Video: Limiting Reactant
Hello, attached is a video explaining the concept of limiting reactants
- Sat Nov 14, 2015 7:59 pm
- Forum: Naming
- Topic: Naming of Fe(CO)5
- Replies: 2
- Views: 551
Naming of Fe(CO)5
When naming the coordinate compound Fe(CO)5, I was surprised to find the name was pentacarbonyliron as opposed to pentacarbonylferrate. Why is this the case?
- Mon Nov 02, 2015 12:09 am
- Forum: Formal Charge and Oxidation Numbers
- Topic: Lewis Dot Structure and Formal Charge
- Replies: 3
- Views: 898
Re: Lewis Dot Structure and Formal Charge
Both structures are correct resonance structure, and the one with the triple bond is the preferred one because it is more stable. This is because Oxygen is more electronegative than nitrogen, and also because triple bonds are intrinsically more stable than double bonds.
- Mon Oct 26, 2015 7:44 pm
- Forum: Octet Exceptions
- Topic: Octet exceptions
- Replies: 2
- Views: 1028
Re: Octet exceptions
Only elements that have access to the d-orbital electrons are able to have expanded octets
- Sat Oct 17, 2015 10:16 pm
- Forum: Dipole Moments
- Topic: Dipole Moment Arrows
- Replies: 5
- Views: 3157
Re: Dipole Moment Arrows
As far as I am aware, both ways are essentially the same with merely a reversal in sign. How it begins/last which way the arrow points is arbitrary as long as you remain consistent with that direction throughout the entirety of the problem.
- Sat Oct 17, 2015 10:08 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Aufbau Princple
- Replies: 2
- Views: 677
Re: Aufbau Princple
A half filled subshell in the d orbital is more stable than if there was a 6th electron. Additionally having a half filled d orbital provides more stability than a full s orbital and a d-orbital that is not full or half filled.
- Mon Oct 05, 2015 12:50 am
- Forum: Significant Figures
- Topic: All students read this sig fig post [ENDORSED]
- Replies: 170
- Views: 36918
Re: All students read this sig fig post [ENDORSED]
I believe that when you are working with constants that are exact (or approximated down to specific number like 3 x 10^8m*s^-1) they are not counted when determining the number of significant figures. Contrarily, when the constants are not exact you should aim to have a larger quantity of significan...