Search found 40 matches
- Thu Jun 14, 2018 11:18 am
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Predicting polarizability and polarizing power
- Replies: 5
- Views: 841
Re: Predicting polarizability and polarizing power
Polarizability increases w atomic radius aka down a group bc their electron clouds can easily be distorted where as small highly charged cations have high polarizing power (decreases across a period)
- Tue Jun 12, 2018 8:47 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Oxidation State
- Replies: 3
- Views: 493
Re: Oxidation State
Also to add does anyone know if we are responsible for naming complex ions before determining the oxidation number? Do we need to name the compounds like the chapter 17 hw questions say or will they be given to us??
- Tue Jun 12, 2018 6:31 pm
- Forum: Bond Lengths & Energies
- Topic: Bond Angles
- Replies: 3
- Views: 612
Bond Angles
When you have a molecule that is a tetrahedral in respect to the electron geometry but it has 1 lone pair or 2 would we just say the angles are less than 109.5 or would we have to be more specific?
- Sat Jun 09, 2018 7:12 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3592683
Re: Post All Chemistry Jokes Here
Q: What is the show cesium and iodine love watching together?
A: CSI
A: CSI
- Sat Jun 09, 2018 7:12 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3592683
Re: Post All Chemistry Jokes Here
Did you know that oxygen went for a second date with potassium?
How did it go?
It went OK2!
How did it go?
It went OK2!
- Sat Jun 09, 2018 7:10 pm
- Forum: Bond Lengths & Energies
- Topic: Bond length
- Replies: 5
- Views: 804
Re: Bond length
You can look at the number of electrons that are present in each molecule. If there are more lone pairs, they will repel each other and cause a longer bond to be formed. So for F when more electrons are added, it makes the bond longer? Yes in this case because you are adding more electrons and ther...
- Sun Jun 03, 2018 4:22 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Naming Structures
- Replies: 8
- Views: 1048
Re: Naming Structures
I do not think we will need to know how to name molecular structures for the final, however I could be wrong.
- Sun Jun 03, 2018 4:21 pm
- Forum: Hybridization
- Topic: Differences Between Pi and Sigma bonds
- Replies: 7
- Views: 774
Re: Differences Between Pi and Sigma bonds
all bonds have one sigma bond, when you have two bonds there is one sigma and one pi bond, and when you have a triple bond you have your sigma and two pi bonds. I think this is an important rule to remember and to be able to distinguish
- Sun Jun 03, 2018 4:18 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Transition Metal Valence Electrons
- Replies: 3
- Views: 498
Re: Transition Metal Valence Electrons
I believe you look at the 2 electrons in the 4s2 and the two electrons in the 3d2. This would be a total of 4 electrons ie. your four valenece electrons.
- Mon May 28, 2018 3:11 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSPER MODEL
- Replies: 3
- Views: 1315
Re: VSPER MODEL
I was wondering if anyone knew how to treat lone pairs when trying to name the molecular geometry?
- Mon May 28, 2018 12:25 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3592683
Re: Post All Chemistry Jokes Here
Q: Why do chemistry students do well when working with ammonia?
A: Because it's pretty basic stuff.
A: Because it's pretty basic stuff.
- Mon May 28, 2018 12:25 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3592683
Re: Post All Chemistry Jokes Here
A photon checks into a hotel and is asked if he needs any help with his luggage.
He says, "No, I'm traveling light"
He says, "No, I'm traveling light"
- Mon May 28, 2018 12:24 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3592683
Re: Post All Chemistry Jokes Here
What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
wait for it..
A ferrous wheel.
wait for it..
A ferrous wheel.
- Mon May 21, 2018 9:48 pm
- Forum: Lewis Structures
- Topic: 3.55
- Replies: 6
- Views: 565
Re: 3.55
Nabeeha Khan 1D wrote:BrO IS a radical because it has an odd number of valence electrons, but I think you are confusing #55 and #56 as part D for #55 is not BrO and that is instead part D for #56. Hope that helps! :)
thanks so muchhhh nabz:)
- Sun May 20, 2018 3:48 pm
- Forum: Lewis Structures
- Topic: 3.55
- Replies: 6
- Views: 565
Re: 3.55
Why is d.) not a radical since Br has 7 valence e- and O has 6 valence e- for an odd total of 13e-?
- Sat May 19, 2018 11:25 pm
- Forum: Lewis Structures
- Topic: Test #3
- Replies: 11
- Views: 1364
Re: Test #3
Okay thank you so much!
- Fri May 18, 2018 10:17 pm
- Forum: Lewis Structures
- Topic: Test #3
- Replies: 11
- Views: 1364
Re: Test #3
Specifically what hw questions we should know how to do for this test?
- Fri May 18, 2018 10:16 pm
- Forum: Lewis Structures
- Topic: Test #3
- Replies: 11
- Views: 1364
Re: Test #3
Does anyone know if the test for this quarter covers all of chapter 3?
- Sun May 13, 2018 10:11 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3592683
Re: Post All Chemistry Jokes Here
Q: How did the hipster chemist burn his hand?
A: He picked up his beaker before it was cool.
A: He picked up his beaker before it was cool.
- Sun May 13, 2018 10:10 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3592683
Re: Post All Chemistry Jokes Here
Q: Why didn't the chemist enjoy doing chromatography?
A: He got separation anxiety.
A: He got separation anxiety.
- Sun May 13, 2018 10:10 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3592683
Re: Post All Chemistry Jokes Here
Q: What's a pirate's favorite element? (your victim may assume "arrrrgon".)
A: Gold.
A: Gold.
- Sun May 06, 2018 8:31 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Nodal Planes- what are they exactly? [ENDORSED]
- Replies: 6
- Views: 16200
Re: Nodal Planes- what are they exactly? [ENDORSED]
Okay, but for the midterm will we just have to know conceptually what this equation does or will be have to actually use it?
- Sun May 06, 2018 8:30 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: question on fundamentals G
- Replies: 5
- Views: 845
Re: question on fundamentals G
So basically if I understand this right, we would only be expected to know that after many dilutions you would have close to less than one molecule left? If that is right, would we have to show some sort of mathematical work for this?
- Sun May 06, 2018 3:09 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: question on fundamentals G
- Replies: 5
- Views: 845
Re: question on fundamentals G
Hey I was wondering if anyone could explain G.25 for me? I don't understand how to go about this, thanks in advance!! G.25 Practitioners of the branch of alternative medicine known as homeopathy claim that very dilute solutions of substances can have an effect. Is the claim plausible? To explore thi...
- Sun May 06, 2018 3:07 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Nodal Planes- what are they exactly? [ENDORSED]
- Replies: 6
- Views: 16200
Re: Nodal Planes- what are they exactly? [ENDORSED]
But why can't you find an electron in these planes?
- Wed May 02, 2018 8:34 pm
- Forum: *Shrodinger Equation
- Topic: Schrodinger Equation [ENDORSED]
- Replies: 8
- Views: 934
Re: Schrodinger Equation [ENDORSED]
Does anyone know if this equation will be fair game for our midterm? Also will we just have to know what it means conceptually or will we have to actually need to use it?
- Sun Apr 29, 2018 2:36 pm
- Forum: DeBroglie Equation
- Topic: homework problems [ENDORSED]
- Replies: 5
- Views: 674
Re: homework problems [ENDORSED]
I assume that since test 2 is over which covered everything up until 1.5 we can do any hw problem after that.
- Sun Apr 29, 2018 2:29 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electrons in an Orbital [ENDORSED]
- Replies: 8
- Views: 855
Re: Electrons in an Orbital [ENDORSED]
Also can someone explain how the 4th quantum number ties into this topic?
- Sun Apr 29, 2018 2:28 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electrons in an Orbital [ENDORSED]
- Replies: 8
- Views: 855
Re: Electrons in an Orbital [ENDORSED]
does anyone know if we will be required to draw what the different atomic orbitals looks like?
- Sun Apr 22, 2018 9:27 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3592683
Re: Post All Chemistry Jokes Here
I asked the guy sitting next to me if he had any Sodium Hypobromite…
He said NaBrO
He said NaBrO
- Sun Apr 22, 2018 9:24 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3592683
Re: Post All Chemistry Jokes Here
A neutron walks into a bar. He asks the bartender, "How much for a beer?" The bartender offers him a warm smile and says, "For you, no charge."
- Sun Apr 22, 2018 9:12 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 3
- Views: 1179
Re: Test 2
Also can anyone explain the Stefan -Boltzmann Law??
- Sun Apr 22, 2018 9:10 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 3
- Views: 1179
test 2
what is the difference between absorption spectrum vs. emission spectrum?
- Mon Apr 16, 2018 8:41 pm
- Forum: Photoelectric Effect
- Topic: When to use Planck's Constant [ENDORSED]
- Replies: 5
- Views: 668
Re: When to use Planck's Constant [ENDORSED]
For question 9 chapter one, when we are given a frequency of 300 MHz and we want to find the energy per photon I presume we just plug it into the E=hv formula but when i do this I get 2 x 10 ^-37 which is not the write answer for E.
- Sun Apr 15, 2018 11:34 pm
- Forum: Einstein Equation
- Topic: einstein equation and other equations [ENDORSED]
- Replies: 3
- Views: 315
einstein equation and other equations [ENDORSED]
what kinds of questions will we be asked to work out with this equation?
- Sun Apr 15, 2018 11:21 pm
- Forum: Properties of Electrons
- Topic: Geiger -Marsden experiment [ENDORSED]
- Replies: 5
- Views: 642
Re: Geiger -Marsden experiment [ENDORSED]
will we have to know all the early scientists who propsed differenttheories for the composition of an atom??
- Sun Apr 15, 2018 11:18 pm
- Forum: Properties of Light
- Topic: Wavelength [ENDORSED]
- Replies: 9
- Views: 1148
Re: Wavelength [ENDORSED]
do we have to memorize the different wavelength frequencies corresponding to its color for future tests?
- Sun Apr 15, 2018 11:00 pm
- Forum: Properties of Light
- Topic: Wavelength [ENDORSED]
- Replies: 9
- Views: 1148
Re: Wavelength [ENDORSED]
do we have to memorize the different wavelength frequencies corresponding to its color for future tests?
- Thu Apr 12, 2018 12:21 am
- Forum: SI Units, Unit Conversions
- Topic: Chemistry Review Section E
- Replies: 4
- Views: 530
Re: Chemistry Review Section E
No, if i am understanding your question..(not sure if i am), because you are given the units of the ions in moles to begin with .Don't quote me though.
- Thu Apr 12, 2018 12:09 am
- Forum: SI Units, Unit Conversions
- Topic: Chemistry Review Section E
- Replies: 4
- Views: 439
Re: Chemistry Review Section E
Hey okay so what i think is that when they ask for formula units it is the equivalent to atoms/molecules.