Search found 23 matches
- Sun Jun 03, 2018 7:55 pm
- Forum: Hybridization
- Topic: Clarification
- Replies: 4
- Views: 601
Clarification
When it says to apply the types of hybridization to bonding models of inorganic, organic, and biological compounds, what does that exactly mean?
- Sun Jun 03, 2018 7:51 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone pairs
- Replies: 5
- Views: 666
Lone pairs
Why are lone pairs more likely to found in certain locations around a central atom and how/why do they affect the bond angles in a molecule, cation, or anion?
- Sun Jun 03, 2018 7:49 pm
- Forum: Hybridization
- Topic: Sigma and Pi Bonds
- Replies: 5
- Views: 571
Sigma and Pi Bonds
How do you know when there is sigma/pi bonding?
- Sun May 27, 2018 6:08 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarity
- Replies: 2
- Views: 408
Polarity
How do you know when a molecule has polarity or is it in every molecule? If so how do you determine which is positive and which is negative?
- Sun May 27, 2018 5:54 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular Shape
- Replies: 1
- Views: 393
Molecular Shape
Does the amount of bonds affect the shape of the molecule? For example double or triple bonds?
- Sun May 27, 2018 5:50 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angles
- Replies: 1
- Views: 276
Bond Angles
How do you know if bond angles are exactly a number or less than a certain number because I know for some questions the answers are exactly 120 degrees but others are for example angles are less than 109.5 degrees
- Thu May 17, 2018 7:26 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 3
- Views: 600
Formal Charge
When there is a - in front of a molecule you add an electron to the formal charge and when there is a + you subtract an electron from the overall formal charge right?
- Thu May 17, 2018 7:24 pm
- Forum: Lewis Structures
- Topic: Radicals
- Replies: 2
- Views: 367
Radicals
Radicals have an odd number of electrons but is it possible to have an odd number of electrons and the molecule not be a radical?
- Thu May 17, 2018 7:23 pm
- Forum: Resonance Structures
- Topic: Resonance Structures [ENDORSED]
- Replies: 4
- Views: 574
Resonance Structures [ENDORSED]
How do you make sure that you have found all the resonance structures possible or is it just through trial and error?
- Sun May 13, 2018 2:58 pm
- Forum: Ionic & Covalent Bonds
- Topic: 3.29
- Replies: 6
- Views: 786
Re: 3.29
Coulombic attraction is the attraction between oppositely charged particles. For example, the protons in the nucleus of an atom have an attraction for the electrons surrounding the nucleus. The problem is asking you which has the greatest electronegativity.
- Sun May 13, 2018 2:53 pm
- Forum: Lewis Structures
- Topic: Radicals [ENDORSED]
- Replies: 3
- Views: 493
Radicals [ENDORSED]
How do you know if a species is a radical such as between the following NO2-, CH3, and OH?
- Sun May 13, 2018 2:49 pm
- Forum: Lewis Structures
- Topic: Most Important Lewis Structure
- Replies: 4
- Views: 745
Most Important Lewis Structure
When asking the question to draw the most important lewis structure, does that mean to just draw the Lewis Structure that makes its elements most stable (in accordance with addition of double bonding and such) ?
- Sun May 06, 2018 8:05 pm
- Forum: Empirical & Molecular Formulas
- Topic: Order of Elements [ENDORSED]
- Replies: 3
- Views: 589
Order of Elements [ENDORSED]
When writing the empirical and molecular formulas that you calculate, does it matter in what order you put the elements in?
- Sun May 06, 2018 8:04 pm
- Forum: Ionic & Covalent Bonds
- Topic: Atomic and Ionic Radius
- Replies: 2
- Views: 485
Atomic and Ionic Radius
What's the difference between the atomic radius and ionic radius?
- Sun May 06, 2018 8:01 pm
- Forum: Lewis Structures
- Topic: Electron Configuration
- Replies: 6
- Views: 790
Electron Configuration
Why does the d-orbital start at 3 while the s and p start off at 1,2,.. and so on?
- Sun Apr 29, 2018 9:51 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Orientation of Lobes
- Replies: 3
- Views: 533
Orientation of Lobes
when asking to describe the orientation of lobes, does that mean to just describe their shape?
- Sun Apr 29, 2018 9:47 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Atomic Radius
- Replies: 4
- Views: 528
Atomic Radius
How do you find the atomic radius of elements?
- Sun Apr 22, 2018 1:28 pm
- Forum: Properties of Light
- Topic: HW #1.65
- Replies: 2
- Views: 257
HW #1.65
The question asks The energy required to break a C-C bond in a molecule is 348 kJxmol-1. Will visible light be able to break this bond? If yes, what is the color of that light? If not, what type of electromagnetic radiation will be suitable? My question is once I know if the visible light can break ...
- Sun Apr 22, 2018 12:51 pm
- Forum: DeBroglie Equation
- Topic: Homework 1.33 Part C
- Replies: 3
- Views: 387
Re: Homework 1.33 Part C
I believe that going back to Friday's lecture we talked about how energy is released through photoejection of an electron meaning there would be kinetic energy. So overall, yes, we know to use kinetic energy because it is about the photoelectric effect. Photoelectric problems follow the format of th...
- Sun Apr 15, 2018 8:32 pm
- Forum: Properties of Light
- Topic: Calculating the energy of a photon [ENDORSED]
- Replies: 2
- Views: 375
Calculating the energy of a photon [ENDORSED]
In example 1.4, question a asks what is the energy of a single photon of blue light of frequency 6.4x10^14 Hz. To solve you use the equation E(1 photon)=hv. We are solving for e and I already know h being the frequency of the blue light but how do I find v? The example shows that you get (6.626x10^-...
- Sun Apr 15, 2018 7:15 pm
- Forum: Balancing Chemical Reactions
- Topic: Writing Products
- Replies: 2
- Views: 352
Re: Writing Products
I'm pretty sure the product would be KO+ Cl and you would balance it out like this: 2KCl+O2=2KO+2Cl
- Sat Apr 14, 2018 11:38 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Homework 1.13 [ENDORSED]
- Replies: 3
- Views: 440
Homework 1.13 [ENDORSED]
a) Use the Rydberg formula for atomic hydrogen to calculate the wavelength of radiation generated by the transition from n=4 to n=2 For this part of the homework question, I need help understanding how to find c through the relationship of c=vλ beforehand so that I can then actually solve for the wa...
- Sat Apr 14, 2018 11:24 pm
- Forum: Balancing Chemical Reactions
- Topic: Balancing Chemical Equations and Combustion
- Replies: 7
- Views: 1019
Re: Balancing Chemical Equations and Combustion
Combustion reactions involve hydrogen or a hydrocarbon reacting with oxygen and usually always produce water and carbon dioxide as their products. After you figure out which products make sense from these reactants, you can balance the equation.