Search found 29 matches

by Katarina Ho -1B
Sun Jun 10, 2018 11:43 pm
Forum: Hybridization
Topic: sp^3d or dsp^3
Replies: 6
Views: 394

Re: sp^3d or dsp^3

I know that normally you are suppose to write it dsp^3 due to the energy levels.
by Katarina Ho -1B
Sun Jun 10, 2018 11:42 pm
Forum: Hybridization
Topic: Chapter 4 [ENDORSED]
Replies: 4
Views: 373

Re: Chapter 4 [ENDORSED]

Also polar bonds occur when there is a strong electronegative difference shared unbalanced between atoms
by Katarina Ho -1B
Sun Jun 10, 2018 6:06 pm
Forum: Hybridization
Topic: pi bond and sigma bond
Replies: 3
Views: 231

pi bond and sigma bond

Hi do pi bonds stand for p in the p orbital and sigma stand for s in s orbital?
by Katarina Ho -1B
Tue Jun 05, 2018 11:05 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate
Replies: 5
Views: 256

Re: Polydentate

Yes polydentate is simply referring to how many molecules or atoms are bound to the ligand.
by Katarina Ho -1B
Tue Jun 05, 2018 11:02 pm
Forum: Hybridization
Topic: Regions of e- density: Tetrahedral vs. trigonal pyramidal
Replies: 3
Views: 195

Re: Regions of e- density: Tetrahedral vs. trigonal pyramidal

If one of the electron densities is a lone pair the repulsion force is much stronger and would push the others down into a trigonal pyramid.
by Katarina Ho -1B
Tue Jun 05, 2018 10:59 pm
Forum: Hybridization
Topic: The number before the sp
Replies: 3
Views: 224

The number before the sp

Hi i was wondering what the number before the sp represents. I know in class we did examples where some of the hybridizations were 3sp2.
by Katarina Ho -1B
Mon May 28, 2018 11:48 pm
Forum: Electronegativity
Topic: HW question 3.77
Replies: 3
Views: 345

HW question 3.77

In part b why does CF4 have a higher electronegativity difference than CH4?
by Katarina Ho -1B
Mon May 28, 2018 11:15 pm
Forum: Bond Lengths & Energies
Topic: HW question 4.1
Replies: 5
Views: 361

HW question 4.1

In this question why does part a have a lone pair, i thought that if the two bonds were so close together and angled down that neither of them could be a lone pair.
by Katarina Ho -1B
Mon May 28, 2018 11:06 pm
Forum: Lewis Acids & Bases
Topic: Boron and the octet rule [ENDORSED]
Replies: 7
Views: 548

Re: Boron and the octet rule [ENDORSED]

So does this mean that all atoms in the 13 group follow this anomaly or is it just boron and aluminum?
by Katarina Ho -1B
Mon May 28, 2018 11:03 pm
Forum: Dipole Moments
Topic: Class question: polarizability and boiling point
Replies: 2
Views: 206

Re: Class question: polarizability and boiling point

Hi! If polarizability is lower than that means that the strength of the interacting molecular bond is also a lot easier to break. If there bonds are easier to break then you will not have to reach a very high temperature to break them hence them having a lower boiling point.
by Katarina Ho -1B
Mon May 21, 2018 11:48 pm
Forum: Lewis Structures
Topic: 3.39 bracket question
Replies: 2
Views: 149

3.39 bracket question

Hello, in this problem it asks to draw the lewis dot structure for ionic compounds my question is how do you know which molecule gets brackets around it?
by Katarina Ho -1B
Mon May 21, 2018 10:11 pm
Forum: Dipole Moments
Topic: Calculating Dipole Moment [ENDORSED]
Replies: 1
Views: 115

Calculating Dipole Moment [ENDORSED]

Hi in the notes it says that to calculate the dipole moment= charge x distance between atoms. What does it mean when it refers to charge? and will we be given the charge or do we have to calculate that as well?
by Katarina Ho -1B
Mon May 21, 2018 10:02 pm
Forum: Lewis Acids & Bases
Topic: Boron and the octet rule [ENDORSED]
Replies: 7
Views: 548

Boron and the octet rule [ENDORSED]

Hi i'm confused because in class we went over an example of BF3 where Boron only had 6 valence electrons and not a full octet. Why is that okay?
by Katarina Ho -1B
Mon May 21, 2018 2:01 pm
Forum: Lewis Structures
Topic: Resonance Structures
Replies: 1
Views: 127

Resonance Structures

I am not sure if this is the correct topic to label this under but is the only way to know if you have the best lewis structure of a molecule to do the formal charges of every single structure?
by Katarina Ho -1B
Sun May 13, 2018 11:28 pm
Forum: Lewis Structures
Topic: Valence Electrons [ENDORSED]
Replies: 2
Views: 122

Re: Valence Electrons [ENDORSED]

Hi! So valence electrons are just another way of saying the number of electrons an atom has in its outer shell. This helps with formal charge and chemical bonds because normally electrons want 8 valence electrons in their shell. If they only have 6 electrons in their outer shell, they will want to g...
by Katarina Ho -1B
Sun May 13, 2018 11:24 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic Bonds
Replies: 4
Views: 285

Re: Ionic Bonds

Also, normally atoms will only lose as many electrons until they have the same electron configuration as a noble gas, or so that they fill their octet. Say an atom as 12 electrons with two valence electrons. It is unlikely to lose more than 2 valence electrons because once it does it is in a stable ...
by Katarina Ho -1B
Sun May 13, 2018 11:21 pm
Forum: Ionic & Covalent Bonds
Topic: octet explanation [ENDORSED]
Replies: 3
Views: 192

Re: octet explanation [ENDORSED]

I believe it means that they will fill their shells sequentially to fill their octet or as close as they can get to filling their octet.
by Katarina Ho -1B
Mon Apr 30, 2018 7:54 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Knowing the Balmer series HW q1.57
Replies: 3
Views: 259

Knowing the Balmer series HW q1.57

Hi, In this homework question it gives 4 wavelengths of the balmer series and asks you to name the next wavelength in the series. I was wondering if there was a certain equation to solve or you just need to memorize the balmer series?
by Katarina Ho -1B
Mon Apr 30, 2018 7:42 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron's Spin
Replies: 3
Views: 122

Re: Electron's Spin

It means that orbitals can only hold 2 e-s per orbital and each orbital will fill with one e- with spin going up and one e- with spin pointing down. It is just the way electrons orient themselves. It is also important to remember that orbitals will fill first all with only one e- then they will doub...
by Katarina Ho -1B
Mon Apr 30, 2018 7:38 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Short hand for test
Replies: 2
Views: 130

Re: Short hand for test

I believe you can use short hand on the test except for when you are referring to an ion such as Cl- you cannot just write Argon you need to use the noble gas before that.
by Katarina Ho -1B
Mon Apr 30, 2018 7:22 pm
Forum: *Shrodinger Equation
Topic: How are orbitals corresponding to m sub l numbers
Replies: 2
Views: 228

How are orbitals corresponding to m sub l numbers

I am a little confused as to how an orbital can be a negative number. Say n=3 so you are in the 3d subshell. Th orbitals it says can be: -2,-1,0,1,2 but I don't understand what these numbers correspond to?
by Katarina Ho -1B
Wed Apr 25, 2018 3:21 pm
Forum: *Shrodinger Equation
Topic: M sub L level of energy shells confusion
Replies: 1
Views: 217

M sub L level of energy shells confusion

How do you know what to name this level when it refers to px or pz?
by Katarina Ho -1B
Wed Apr 25, 2018 3:18 pm
Forum: *Shrodinger Equation
Topic: Schrodinger Equation [ENDORSED]
Replies: 8
Views: 555

Schrodinger Equation [ENDORSED]

I am a little confused about the application to this equation. Is it only used for Hyrogen atoms? or can it be applied to all atoms?
by Katarina Ho -1B
Mon Apr 16, 2018 10:40 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: HW Question 1.25
Replies: 1
Views: 64

HW Question 1.25

In this homework question, part b, where do they get 3.37*10^-19 J/atom
by Katarina Ho -1B
Mon Apr 16, 2018 9:47 pm
Forum: Properties of Light
Topic: Rydberg equation
Replies: 2
Views: 194

Re: Rydberg equation

I am not quite sure what the ions of Hydrogen have to do with this but the Rydberg equation is just found by deriving the equation En=(-hR)/n^2 . First you just replace En with v*h because En=v*h. When you do this you can factor out h from both sides so the equation is simplified to v=-(1*R)/n^2. Wi...
by Katarina Ho -1B
Mon Apr 16, 2018 9:15 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Atomic Spectra Post Assessment. Question 29
Replies: 1
Views: 81

Atomic Spectra Post Assessment. Question 29

I was wondering what the correct answer to this question was. The question states: 29. In 1.0 s, a 60 W bulb emits 11 J of energy in the form of infrared radiation (heat) of wavelength 1850 nm. What is the energy per photon of light emitted? How many photons of infrared radiation does the lamp gener...
by Katarina Ho -1B
Sun Apr 08, 2018 11:50 pm
Forum: Limiting Reactant Calculations
Topic: M11 HW
Replies: 4
Views: 285

Re: M11 HW

Also, in order to solve part b you must first find out if the second formula will even occur and you will only know that if you find that there is extra oxygen.
by Katarina Ho -1B
Fri Apr 06, 2018 2:38 pm
Forum: Balancing Chemical Reactions
Topic: How to know the state of the molecules [ENDORSED]
Replies: 6
Views: 424

How to know the state of the molecules [ENDORSED]

Do we need to know the states of the compounds in a balanced chemical equation? and if so how do you know the states?

For ex: CuSO4(aq)
by Katarina Ho -1B
Fri Apr 06, 2018 2:23 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Percent composition [ENDORSED]
Replies: 3
Views: 201

Re: Percent composition [ENDORSED]

So do you ever need the percent composition to find the limiting reactant?

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