Search found 180 matches

by 805097738
Fri Dec 06, 2019 6:46 pm
Forum: Bronsted Acids & Bases
Topic: Bronsted Acids/Bases vs. Lewis Acids/Bases
Replies: 3
Views: 59

Re: Bronsted Acids/Bases vs. Lewis Acids/Bases

So bronsted and lewis acids and bases are the same thing just described differently based off of e- or H+ action?
by 805097738
Fri Dec 06, 2019 6:44 pm
Forum: Amphoteric Compounds
Topic: how to identify?
Replies: 5
Views: 171

Re: how to identify?

Compounds containing multiple hydrogen atoms are amphoteric since they can donate and accept hydrogens. For compounds that don't contain multiple hydrogens, we know that certain elements form amphoteric compounds. These elements include copper, zinc, tin, lead, aluminium, and beryllium, and they fo...
by 805097738
Sun Dec 01, 2019 10:33 am
Forum: Lewis Acids & Bases
Topic: 6A.13
Replies: 7
Views: 72

Re: 6A.13

because it has a positive charge it wants to accept electrons and electron pair acceptors are acids
by 805097738
Sun Dec 01, 2019 10:31 am
Forum: Identifying Acidic & Basic Salts
Topic: Final: Strong/ Weak Acids/Bases
Replies: 11
Views: 956

Re: Final: Strong/ Weak Acids/Bases

safe to memorize the strong acids and bases
by 805097738
Sun Dec 01, 2019 10:27 am
Forum: Polyprotic Acids & Bases
Topic: Section 6E.1
Replies: 2
Views: 64

Re: Section 6E.1

what is the problem 6E.1?
by 805097738
Sun Dec 01, 2019 10:24 am
Forum: Air Pollution & Acid Rain
Topic: Acid Rain
Replies: 15
Views: 1489

Re: Acid Rain

is this info necessary for the test?
by 805097738
Sun Dec 01, 2019 10:22 am
Forum: Calculating the pH of Salt Solutions
Topic: 6d11 7th edition
Replies: 3
Views: 390

Re: 6d11 7th edition

Linyu Zeng 1H wrote:You can whether the anions and cations will form bond with H atom or OH- in the water. For example, when Na2CO3 becomes Na+ and (CO3)2- in water, some of the (CO3)2- will form bond with H atom from water and become (HCO3)-, producing OH-. Thus, the solution should have a pH > 7.


always?
by 805097738
Mon Nov 25, 2019 8:53 pm
Forum: Properties & Structures of Inorganic & Organic Bases
Topic: strength of base
Replies: 8
Views: 387

Re: strength of base

Michael Torres 4I wrote:If something is a strong acid, then it will be a weaker base. Weaker acids will also be stronger bases.


how can acids be bases?
by 805097738
Mon Nov 25, 2019 8:35 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: chemical equation states
Replies: 2
Views: 52

Re: chemical equation states

are bases not all aq too?
by 805097738
Mon Nov 25, 2019 8:11 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: How do you know is an acid is strong or weak?
Replies: 6
Views: 85

Re: How do you know is an acid is strong or weak?

I think we just have to memorize the strong ones and realize the rest are considered weak.
by 805097738
Sat Nov 23, 2019 6:39 pm
Forum: *Liquid Structure (Viscosity, Surface Tension, Liquid Crystals, Ionic Liquids)
Topic: Hydrogen Bonding/Pi bonds
Replies: 11
Views: 314

Re: Hydrogen Bonding/Pi bonds

Zoya Mulji 1F wrote:Intermolecular forces:
ionic bonding --> H-bonding --> dipole-dipole bonding --> induced dipole/London dispersion


is this ascending or descending in strength?
by 805097738
Fri Nov 22, 2019 8:39 am
Forum: *Liquid Structure (Viscosity, Surface Tension, Liquid Crystals, Ionic Liquids)
Topic: Viscosity
Replies: 19
Views: 445

Re: Viscosity

Max Madrzyk Dis 4E wrote:The higher the viscosity the smoother the liquid flows so like honey would have lower viscosity than water.


I don't think this is correct.
by 805097738
Thu Nov 21, 2019 8:37 pm
Forum: Bond Lengths & Energies
Topic: Boiling Point
Replies: 7
Views: 418

Re: Boiling Point

so electrons with more electrons have stronger London forces?
by 805097738
Thu Nov 21, 2019 8:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs
Replies: 8
Views: 196

Re: Lone Pairs

repulsion of lone pairs affects the bond angles
by 805097738
Thu Nov 21, 2019 8:07 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Sigma and Pi Bonds
Replies: 25
Views: 353

Re: Sigma and Pi Bonds

how are we supposed to order bonds?
by 805097738
Thu Nov 21, 2019 8:02 pm
Forum: Hybridization
Topic: hybridization on the test?
Replies: 10
Views: 153

Re: hybridization on the test?

what do we need to know about pi and sigma bonds?
by 805097738
Sun Nov 17, 2019 10:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: vsepr angles
Replies: 10
Views: 75

Re: vsepr angles

is there a trick to help memorize this?
by 805097738
Sun Nov 17, 2019 10:25 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: SF4
Replies: 3
Views: 35

Re: SF4

does this mean the lone pair is place equally between the bonding atoms because its repulsion would create this positioning?
by 805097738
Sat Nov 16, 2019 12:27 pm
Forum: Hybridization
Topic: 2F.13
Replies: 2
Views: 71

Re: 2F.13

what is the molecule?
by 805097738
Fri Nov 15, 2019 9:44 am
Forum: *Liquid Structure (Viscosity, Surface Tension, Liquid Crystals, Ionic Liquids)
Topic: Viscosity/Surface Tension
Replies: 7
Views: 183

Re: Viscosity/Surface Tension

higher surface tension higher viscosity
by 805097738
Thu Nov 14, 2019 4:36 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Induced dipoles
Replies: 7
Views: 485

Re: Induced dipoles

Are there other forms of dipoles?
by 805097738
Thu Nov 14, 2019 4:33 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: bond angles
Replies: 10
Views: 108

Re: bond angles

i'd memorize the examples that lavelle went over in class
by 805097738
Tue Nov 12, 2019 7:24 pm
Forum: *Liquid Structure (Viscosity, Surface Tension, Liquid Crystals, Ionic Liquids)
Topic: Rod vs spherical shaped molecules
Replies: 10
Views: 264

Re: Rod vs spherical shaped molecules

Rod shaped molecules have more SA and higher boiling points than spherical molecules.
by 805097738
Tue Nov 12, 2019 7:22 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 5
Views: 44

Re: VSEPR

I think we should be able to derive the molecular shape but memorizing would help
by 805097738
Tue Nov 12, 2019 7:20 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: bond order
Replies: 4
Views: 307

Re: bond order

can someone explain what bond order is?
by 805097738
Tue Nov 12, 2019 7:19 pm
Forum: Dipole Moments
Topic: London forces
Replies: 4
Views: 38

Re: London forces

So London Forces are temporary?
by 805097738
Tue Nov 12, 2019 7:13 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Help of 3F.11
Replies: 5
Views: 59

Re: Help of 3F.11

I use the saying hydrogen bonds are FON (like fun) to remember that they occur with these atoms. this eliminates a b and c
by 805097738
Wed Nov 06, 2019 3:01 pm
Forum: DeBroglie Equation
Topic: 1B. 21
Replies: 5
Views: 196

Re: 1B. 21

the weight is given so you can calculate mass * delta v for delta p
by 805097738
Wed Nov 06, 2019 2:57 pm
Forum: Photoelectric Effect
Topic: Best way to study for this topic?
Replies: 8
Views: 271

Re: Best way to study for this topic?

i just keep doing practice problems to help memorize the procedure
by 805097738
Wed Nov 06, 2019 1:02 pm
Forum: Dipole Moments
Topic: How do i know if a molecule has a dipole moment?
Replies: 7
Views: 119

Re: How do i know if a molecule has a dipole moment?

A dipole moment is a charge separation that is caused by differences in electronegativity differences. Therefore, if the two atoms that are bonded together are the same element, they have the exact same electronegativity and will be non polar. Otherwise, if there is a difference in electronegativit...
by 805097738
Wed Nov 06, 2019 12:59 pm
Forum: Resonance Structures
Topic: Resonance Structure Midterm
Replies: 5
Views: 104

Re: Resonance Structure Midterm

It should state specifically all or one
by 805097738
Sat Nov 02, 2019 10:54 pm
Forum: Electronegativity
Topic: What is isoelectronic?
Replies: 13
Views: 140

Re: What is isoelectronic?

having the same number of electrons
by 805097738
Fri Nov 01, 2019 8:56 pm
Forum: Bond Lengths & Energies
Topic: Single bond vs double bond
Replies: 14
Views: 305

Re: Single bond vs double bond

double bonds are stronger, making their bond length shorter as the atoms are pulled closer together
by 805097738
Fri Nov 01, 2019 8:54 pm
Forum: Octet Exceptions
Topic: More than 8 valence e-
Replies: 8
Views: 98

Re: More than 8 valence e-

the d orbital allows these atoms to hold extra electrons
by 805097738
Fri Nov 01, 2019 9:49 am
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge equation
Replies: 9
Views: 87

Re: Formal Charge equation

I think you misunderstood what B represents. Your TA was probably referring to the number of bonds, which would work for the equation.
by 805097738
Thu Oct 31, 2019 7:19 am
Forum: Electronegativity
Topic: Electron Negativity vs affinity?
Replies: 5
Views: 53

Re: Electron Negativity vs affinity?

I don't think it's too important to know but as long as you know they follow the same trends and understand what they both mean that's all that needed to know
by 805097738
Thu Oct 31, 2019 7:16 am
Forum: Octet Exceptions
Topic: List of Octet exceptions
Replies: 6
Views: 134

Re: List of Octet exceptions

Natalie Benitez 1C wrote:Is there a limit on the number of electrons the exceptions to the octet rule can have?


I believe they tend to hold 10-12 electrons.
by 805097738
Thu Oct 31, 2019 7:12 am
Forum: Octet Exceptions
Topic: Radicals
Replies: 9
Views: 171

Re: Radicals

atoms with an unpaired electron are radicals
by 805097738
Tue Oct 29, 2019 6:27 pm
Forum: Resonance Structures
Topic: Delocalization
Replies: 6
Views: 108

Re: Delocalization

if they are delocalized they can move about the atoms when needed and don't have a strictly defined location
by 805097738
Mon Oct 28, 2019 4:04 pm
Forum: Lewis Structures
Topic: Expanded valence shells
Replies: 3
Views: 42

Re: Expanded valence shells

how do you know how many valence electrons atoms in the d block have
by 805097738
Mon Oct 28, 2019 3:59 pm
Forum: Lewis Structures
Topic: Orbitals
Replies: 9
Views: 141

Re: Orbitals

yes, you remove an electron from the highest energy shell
by 805097738
Mon Oct 28, 2019 1:52 pm
Forum: Lewis Structures
Topic: Lone Pairs
Replies: 3
Views: 36

Re: Lone Pairs

I place one dot on each side first and then start pairing up if there are more electrons.
by 805097738
Mon Oct 28, 2019 1:45 pm
Forum: Ionic & Covalent Bonds
Topic: valence electrons
Replies: 6
Views: 66

Re: valence electrons

yes because they are in the last shell
by 805097738
Sun Oct 27, 2019 9:58 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Chromium and Copper
Replies: 5
Views: 57

Re: Chromium and Copper

because a fully filled or half filled set of orbitals is more stable so an electron is taken from the higher energy level to make the 3d level more stable
by 805097738
Sat Oct 26, 2019 12:55 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Noble Gas Configuration
Replies: 10
Views: 133

Re: Noble Gas Configuration

I think it's safe to write in shorthand when the atom has an extremely high amount of electrons unless the question asks for the full electron configuration.
by 805097738
Sat Oct 26, 2019 12:52 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Resonance Hybrid
Replies: 2
Views: 32

Re: Resonance Hybrid

It is the average of the resonance structures and describes the bonding in a molecule. Resonance structures are used when one Lewis structure for a single molecule cannot fully describe the bonding that takes place between neighboring atoms relative to the empirical data for the actual bond lengths ...
by 805097738
Sat Oct 26, 2019 12:48 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configurations
Replies: 2
Views: 21

Re: Electron Configurations

3p comes before 4s because you fill up the orbitals with lower energy levels first and 3 id lower than 4
by 805097738
Fri Oct 25, 2019 9:34 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Noble Gas Configuration
Replies: 10
Views: 133

Re: Noble Gas Configuration

I used the noble gas short cut for atoms with a very high amount of electrons. The question should state if you need to write out the full configuration though.
by 805097738
Fri Oct 25, 2019 9:29 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configurations of ions
Replies: 4
Views: 37

Re: Electron Configurations of ions

the electron would be removed from the highest energy state.
by 805097738
Wed Oct 23, 2019 8:59 am
Forum: Quantum Numbers and The H-Atom
Topic: Yet Another Electron Spin Question
Replies: 5
Views: 123

Re: Yet Another Electron Spin Question

will this be necessary to know for the test?
by 805097738
Wed Oct 23, 2019 8:54 am
Forum: Quantum Numbers and The H-Atom
Topic: 1D. 23)
Replies: 5
Views: 140

Re: 1D. 23)

so if ml is given and it is one value, that represents one orbital?
by 805097738
Wed Oct 23, 2019 8:49 am
Forum: Quantum Numbers and The H-Atom
Topic: 1D.19
Replies: 6
Views: 83

Re: 1D.19

the number of orbitals is represented by the number of ml values
by 805097738
Mon Oct 21, 2019 10:12 am
Forum: *Shrodinger Equation
Topic: Calculating the probability of finding an electron at a certain location
Replies: 5
Views: 236

Re: Calculating the probability of finding an electron at a certain location

for finding the probable location of an electron you multiple the uncertainty in momentum x uncertainty in position and set it equal to or greater than planck's constant / 4pi. to find uncertainty in momentum you multiply mass of electron which is given x uncertainty in velocity which you should be ...
by 805097738
Mon Oct 21, 2019 10:04 am
Forum: *Shrodinger Equation
Topic: Hamiltonian
Replies: 6
Views: 90

Re: Hamiltonian

Will we be expected to calculate this?
by 805097738
Mon Oct 21, 2019 9:50 am
Forum: *Shrodinger Equation
Topic: Schrodinger equation
Replies: 4
Views: 72

Re: Schrodinger equation

it describes general placement of electrons in an atom with a wave function. Not sure what we will be using it for though.
by 805097738
Mon Oct 21, 2019 9:45 am
Forum: Properties of Electrons
Topic: Wave-like and particle-like properties
Replies: 7
Views: 88

Re: Wave-like and particle-like properties

yes but the larger the mass of the object, the more difficult it is to detect the wavelength
by 805097738
Mon Oct 21, 2019 9:44 am
Forum: Properties of Electrons
Topic: mass of electron, proton, neutron
Replies: 7
Views: 106

Re: mass of electron, proton, neutron

they will be on the equation sheet!
by 805097738
Sat Oct 19, 2019 9:54 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals in relation to arrows
Replies: 10
Views: 224

Re: Orbitals in relation to arrows

you know the direction of the spin indicated by the 1/2 or -1/2 number given. 1/2 is spin up and -1/2 is spin down. If there are 2 electrons in one orbital they will have opposite spins because they are paired.
by 805097738
Sat Oct 19, 2019 9:52 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: X,Y,and Z
Replies: 4
Views: 41

Re: X,Y,and Z

x, y, and z represent the 3 orbitals in the 2P subshell. these orbitals are filled up in the order of x,y,z for each first electron and then x,y,z again for the next round of electrons.
by 805097738
Wed Oct 16, 2019 9:36 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Indeterminacy Equation
Replies: 5
Views: 59

Re: Indeterminacy Equation

To locate the electron's location. However, because it is known we can't determine it's exact location, we use the uncertainty of it's position and momentum in order to determine the range of possible locations.
by 805097738
Wed Oct 16, 2019 9:33 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Building arguments on indeterminacy equation
Replies: 2
Views: 37

Re: Building arguments on indeterminacy equation

I think due to the electron's limitations relative to the nucleus we can predict the cloud of probable locations
by 805097738
Wed Oct 16, 2019 9:30 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Which equation to use for determining uncertainty?
Replies: 4
Views: 50

Re: Which equation to use for determining uncertainty?

(uncertainty in position)(uncertainty in momentum)> h/4(pi)

I'd use the formula he taught us in class as Lavelle teaches material and formulas relevant to his tests
by 805097738
Sun Oct 13, 2019 6:52 pm
Forum: DeBroglie Equation
Topic: Wave properties of electrons
Replies: 3
Views: 71

Re: Wave properties of electrons

1) yes
2) neutrons have wave-like properties
by 805097738
Fri Oct 11, 2019 8:53 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Equation
Replies: 3
Views: 545

Re: Rydberg Equation

Rydberg Equation: 1/λ=R(1/n(1)^2−1/n(2)^2) You can change n(1) and n(2), which refer to different energy levels in the Hydrogen atom. For example, you can use n(1)= 1 and n(2)=2 to find the wavelength of light emitted when an electron drops from the n=2 to the n=1 energy levIel (or the wavelength o...
by 805097738
Fri Oct 11, 2019 8:45 am
Forum: Photoelectric Effect
Topic: Photoelectric Effect Intensity of Light
Replies: 7
Views: 85

Re: Photoelectric Effect Intensity of Light

intensity is related to number of photons.
more photons= higher intensity
by 805097738
Thu Oct 10, 2019 10:00 am
Forum: Properties of Light
Topic: Atomic Spectra
Replies: 7
Views: 97

Re: Atomic Spectra

Will we be expected to memorize this for any tests? How important is this information?
by 805097738
Wed Oct 09, 2019 10:04 am
Forum: Properties of Light
Topic: Light intensity
Replies: 10
Views: 134

Re: Light intensity

Leila_4E wrote:Is there a difference between the energy per photon and the threshold energy?


if the energy per photon is greater than the threshold energy, there will be excess energy.
by 805097738
Wed Oct 09, 2019 9:38 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Calculating Energy per Photon
Replies: 3
Views: 45

Calculating Energy per Photon

How would you go about solving this:

Calculate the energy per photon of ultraviolet radiation of frequency 3.00 x 1015 Hz.

Which formula(s) would be used?
by 805097738
Mon Oct 07, 2019 9:35 am
Forum: Photoelectric Effect
Topic: Photoelectric effect post-quiz 17-19 [ENDORSED]
Replies: 6
Views: 4298

Re: Photoelectric effect post-quiz 17-19 [ENDORSED]

[quote="Silvia Huang 3D"]a)

how did you find m and what is m?
by 805097738
Mon Oct 07, 2019 7:35 am
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 3541

Re: Week 2 Homework Problems [ENDORSED]

I'm doing a mix of fundamental questions and quantum questions. You can decide if you need more practice for the review of fundamentals test or if you are ready to move on to quantum problems!
by 805097738
Mon Oct 07, 2019 7:31 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg equation [ENDORSED]
Replies: 73
Views: 3988

Re: Rydberg equation [ENDORSED]

to clarify, is this the speed of light= frequency * wavelength equation? if so it would be used to determine the value of one of those if given the other two.
by 805097738
Mon Oct 07, 2019 7:29 am
Forum: Administrative Questions and Class Announcements
Topic: KAREN SUN 5-7PM WORKSHOP - DOWNLAOD WORKSHEETS HERE
Replies: 53
Views: 3524

Re: KAREN SUN 5-7PM WORKSHOP - DOWNLAOD WORKSHEETS HERE

Will we be doing these sorts of worksheets every week in your work shop?
by 805097738
Thu Oct 03, 2019 9:02 am
Forum: Significant Figures
Topic: Sig Figs Rule
Replies: 2
Views: 90

Re: Sig Figs Rule

The numbers given will determine the amount of sig figs in your answer, not the numbers you choose while solving the problem.
by 805097738
Tue Oct 01, 2019 10:11 am
Forum: SI Units, Unit Conversions
Topic: Unit Conversions
Replies: 11
Views: 230

Unit Conversions

How do you convert atoms to moles?
by 805097738
Tue Oct 01, 2019 9:49 am
Forum: SI Units, Unit Conversions
Topic: Homework for Week 1
Replies: 16
Views: 382

Re: Homework for Week 1

Yes, that is correct! I'm labeling my homework with the discussion section this week to make sure it doesn't get lost in the choas of turning it in during lecture.
by 805097738
Sun Sep 29, 2019 3:24 pm
Forum: Empirical & Molecular Formulas
Topic: Empirical Formula
Replies: 6
Views: 83

Re: Empirical Formula

adding to the question: does it matter since the ratios are the same?
by 805097738
Sun Sep 29, 2019 9:14 am
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student - Part II [ENDORSED]
Replies: 191
Views: 14396

Re: Advice from a Medical Student - Part II [ENDORSED]

Really enjoyed reading about your academic experience and journey so far. Sounds like this path is very rewarding and opportunistic. Do you think you could have started a challenging and rewarding career without medical school or did you always feel medical school was necessary for any job you might...

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