Search found 100 matches
- Thu Feb 25, 2021 8:34 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Ranking Species according to standard potentials
- Replies: 2
- Views: 9
Re: Ranking Species according to standard potentials
the larger the negativity, the more oxidized the species and thus it is a better reducing agent
- Thu Feb 25, 2021 8:32 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Salt Bridge
- Replies: 30
- Views: 71
Re: Salt Bridge
creates neutrality!!!
- Thu Feb 25, 2021 8:32 pm
- Forum: Balancing Redox Reactions
- Topic: E naught
- Replies: 15
- Views: 35
Re: E naught
it is because E naught is an intensive property I think
- Thu Feb 25, 2021 8:30 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Sapling 7/8 #15
- Replies: 7
- Views: 52
Re: Sapling 7/8 #15
use the Nernst equation!
- Thu Feb 25, 2021 8:29 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cathode vs. Anode
- Replies: 8
- Views: 45
Re: Cathode vs. Anode
it would depend on which side the the run is being oxidized and which side is being reduced
- Thu Feb 25, 2021 8:28 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: dilutions and Ecell
- Replies: 16
- Views: 222
Re: dilutions and Ecell
dilution decreases cell potential I am pretty sure
- Thu Feb 25, 2021 8:27 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: n in NFE
- Replies: 37
- Views: 381
Re: n in NFE
the value of n
- Thu Feb 25, 2021 8:26 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Eºcell
- Replies: 11
- Views: 35
Re: Eºcell
yup! you are right
- Thu Feb 25, 2021 8:25 pm
- Forum: Balancing Redox Reactions
- Topic: sapling 7/8 number 3
- Replies: 4
- Views: 27
Re: sapling 7/8 number 3
it just means hydroxide ions and "spectator" ions are present in solution
- Thu Feb 25, 2021 8:24 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Battery
- Replies: 19
- Views: 238
Re: Battery
yes that is right!
- Thu Feb 25, 2021 8:23 pm
- Forum: Administrative Questions and Class Announcements
- Topic: When is Sapling HW due?
- Replies: 22
- Views: 68
Re: When is Sapling HW due?
It is due this Sunday at 11:58pm
- Thu Feb 25, 2021 8:23 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Units for delta G
- Replies: 31
- Views: 351
Re: Units for delta G
units are kJ
- Thu Feb 25, 2021 8:22 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Concentration Cell [ENDORSED]
- Replies: 6
- Views: 38
Re: Concentration Cell [ENDORSED]
Because it would occur on the side with the lower concentration of cations
- Thu Feb 25, 2021 8:21 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: G from K
- Replies: 9
- Views: 32
Re: G from K
If K >1, E∘ will be positive and ΔG∘ will be negative. If K < 1, E∘ will be negative and ΔG∘ will be positive. If K = 1, both values will be 0.
- Wed Feb 17, 2021 4:03 pm
- Forum: Administrative Questions and Class Announcements
- Topic: MIDTERM 2
- Replies: 9
- Views: 84
MIDTERM 2
Does anyone know which lectures specifically will be on Midterm 2?
- Wed Feb 17, 2021 3:46 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Meaning of K
- Replies: 47
- Views: 95
Re: Meaning of K
Yup! equilibrium constant or I guess Kelvin... but the indication should be clear in the question
- Wed Feb 17, 2021 3:45 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: qrev
- Replies: 25
- Views: 97
Re: qrev
heat generation and transfer in a reversible rxn
- Wed Feb 17, 2021 3:44 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Bomb calorimeter
- Replies: 8
- Views: 23
Re: Bomb calorimeter
the bomb calorimeter is specific to maintaining the volume of gas inside
- Wed Feb 17, 2021 3:42 pm
- Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
- Topic: Units of W
- Replies: 11
- Views: 33
Re: Units of W
It does not have units, you are right
- Wed Feb 17, 2021 3:41 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Delta H and Delta S both positive
- Replies: 26
- Views: 69
Re: Delta H and Delta S both positive
spontaneous at high temperatures
- Tue Feb 09, 2021 5:07 pm
- Forum: Ideal Gases
- Topic: Chem BL
- Replies: 100
- Views: 444
Re: Chem BL
I am going to take BL alone next quarter and then start the 7A series
- Tue Feb 09, 2021 5:05 pm
- Forum: Student Social/Study Group
- Topic: Finals
- Replies: 23
- Views: 64
Re: Finals
honestly last quarter the midterms and the final felt relatively equal in the difficulty of the questions. The only difference is the amount of content covered
- Tue Feb 09, 2021 5:04 pm
- Forum: Student Social/Study Group
- Topic: When is Midterm 2?
- Replies: 4
- Views: 20
Re: When is Midterm 2?
Im assuming it will be week 7 or 8 but not sure
- Tue Feb 09, 2021 5:03 pm
- Forum: Student Social/Study Group
- Topic: Test curve?
- Replies: 27
- Views: 133
Re: Test curve?
People do really well on the exams so I don't think a curve will happen
- Tue Feb 09, 2021 5:02 pm
- Forum: Calculating Work of Expansion
- Topic: Work: Compression and Expansion
- Replies: 6
- Views: 34
Re: Work: Compression and Expansion
yes that's correct!
- Thu Feb 04, 2021 11:15 am
- Forum: Administrative Questions and Class Announcements
- Topic: Chem Community Grade Error
- Replies: 15
- Views: 102
Re: Chem Community Grade Error
Lavelle included this week. But don't worry, once you do them it will be updated. Mine were off all of last quarter but I still got full credit because I had 50 by the end
- Thu Feb 04, 2021 11:14 am
- Forum: General Science Questions
- Topic: Tips
- Replies: 24
- Views: 78
Re: Tips
truly doing as much practice as you can really helps
- Thu Feb 04, 2021 11:13 am
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: External Pressure
- Replies: 32
- Views: 63
Re: External Pressure
I think its the pressure pushing down on the piston
- Thu Feb 04, 2021 11:12 am
- Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
- Topic: w
- Replies: 12
- Views: 140
Re: w
yes you do
- Thu Feb 04, 2021 11:12 am
- Forum: Administrative Questions and Class Announcements
- Topic: Chemistry Community Points
- Replies: 11
- Views: 50
Re: Chemistry Community Points
Hi! I had this issue last quarter. As long as you have 50 by the end of the quarter you will receive full credit. He will update it
- Thu Jan 28, 2021 8:18 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Enthalpies
- Replies: 2
- Views: 18
Re: Enthalpies
I was wondering the same thing and I think yes... it will probably be included in the questions
- Thu Jan 28, 2021 8:16 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Water as a Reactant
- Replies: 9
- Views: 36
Re: Water as a Reactant
yes disregard H20 I think but usually it will tell you the state of substance
- Thu Jan 28, 2021 8:15 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: How to tell if products or reactants is more stable
- Replies: 3
- Views: 18
Re: How to tell if products or reactants is more stable
When k is big, the products are favored and when k is small the reactant is favored
- Thu Jan 28, 2021 8:14 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Correct units for Standard Reaction Enthalpy
- Replies: 7
- Views: 23
- Thu Jan 28, 2021 8:13 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Would an aq agent be included in K?
- Replies: 27
- Views: 83
Re: Would an aq agent be included in K?
yes aq is included
- Sat Jan 23, 2021 8:53 pm
- Forum: Phase Changes & Related Calculations
- Topic: Constant Temperature
- Replies: 20
- Views: 70
Re: Constant Temperature
yup! that's correct
- Sat Jan 23, 2021 8:53 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Standard State
- Replies: 11
- Views: 67
Re: Standard State
the state is 25 degrees celsius with a 1 atm pressure
- Sat Jan 23, 2021 8:52 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Solids in Ice Tables
- Replies: 11
- Views: 50
Re: Solids in Ice Tables
solids are not included!
- Sat Jan 23, 2021 8:51 pm
- Forum: Phase Changes & Related Calculations
- Topic: H and q
- Replies: 47
- Views: 178
Re: H and q
h is enthalpy and q is heat
- Sat Jan 23, 2021 8:50 pm
- Forum: Student Social/Study Group
- Topic: Midterm Study Tips
- Replies: 41
- Views: 154
Re: Midterm Study Tips
the review sessions are super helpful!
- Wed Jan 13, 2021 3:11 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Change in K (P&T)
- Replies: 9
- Views: 58
Re: Change in K (P&T)
I believe only temperature can change k
- Wed Jan 13, 2021 3:10 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Left vs. Right
- Replies: 29
- Views: 128
Re: Left vs. Right
they mean the same thing
- Wed Jan 13, 2021 3:09 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: q vs k
- Replies: 62
- Views: 222
Re: q vs k
yes k and q are the same but k represents the ratio at equilibrium and and q represents other points in the reaction
- Wed Jan 13, 2021 3:06 pm
- Forum: Phase Changes & Related Calculations
- Topic: lecture 5 question
- Replies: 9
- Views: 110
Re: lecture 5 question
yes that's correct
- Wed Jan 13, 2021 3:06 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Difference between kA and kB
- Replies: 8
- Views: 54
Re: Difference between kA and kB
Ka is for acids and Kb is for bases
- Sat Jan 09, 2021 3:50 pm
- Forum: Ideal Gases
- Topic: Kc vs Kp
- Replies: 109
- Views: 999
Re: Kc vs Kp
If the question does not specifically indicate which K is wants, look at the units given. If they are pressure units like bar, you are finding Kp... if not, find Kc
- Sat Jan 09, 2021 3:48 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: very large K
- Replies: 6
- Views: 50
Re: very large K
yes I think you are correct about that
- Sat Jan 09, 2021 3:48 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: terminology
- Replies: 11
- Views: 86
Re: terminology
If the reaction favors the right/left, that means the reaction is moving towards that side of the reaction and creating more of it
- Sat Jan 09, 2021 3:47 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: K vs. Q
- Replies: 53
- Views: 210
Re: K vs. Q
yup! that's correct
- Sat Dec 12, 2020 9:45 am
- Forum: General Science Questions
- Topic: Lavelle Website Password
- Replies: 1
- Views: 26
Lavelle Website Password
Does anyone know the password to the website for 14A? I got logged out and I can't find it anywhere
- Sun Dec 06, 2020 5:13 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: pH formula?
- Replies: 46
- Views: 969
Re: pH formula?
pH= -log[H+]
pH= 14-pOH
pH= 14 - (-log[OH-])
it depends on what you are given
pH= 14-pOH
pH= 14 - (-log[OH-])
it depends on what you are given
- Sun Dec 06, 2020 5:11 pm
- Forum: Administrative Questions and Class Announcements
- Topic: CCLE fixed?
- Replies: 19
- Views: 126
Re: CCLE fixed?
Thats super strange mine is working as usual. Not sure...
- Sun Dec 06, 2020 5:10 pm
- Forum: Properties & Structures of Inorganic & Organic Bases
- Topic: Equilibrium sign
- Replies: 9
- Views: 373
Re: Equilibrium sign
No the dissociation is complete and the equilibrium sign does not apply
- Sun Dec 06, 2020 5:09 pm
- Forum: Bronsted Acids & Bases
- Topic: Proton Donor/Acceptor
- Replies: 2
- Views: 10
Re: Proton Donor/Acceptor
Yup! You got it
- Sun Dec 06, 2020 4:59 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Negative pH of acid
- Replies: 16
- Views: 85
Re: Negative pH of acid
I don't believe the pH can drop below 0 given that the scale is 0-14.
- Sun Dec 06, 2020 4:57 pm
- Forum: Lewis Structures
- Topic: Most Stable Structure
- Replies: 23
- Views: 159
Re: Most Stable Structure
You need to calculate the formal charge of each structure and evaluate based off of that
- Sun Dec 06, 2020 4:56 pm
- Forum: Naming
- Topic: Naming Coordination Compounds
- Replies: 9
- Views: 77
Re: Naming Coordination Compounds
when the complex has a negative charge
- Sun Dec 06, 2020 4:55 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Memorization for final
- Replies: 9
- Views: 79
Re: Memorization for final
^^ the only thing im aware we need to memorize is the naming of formulas, strong acids, strong bases, the light spectrum, and periodic trends but I am sure there is more
- Sun Dec 06, 2020 4:54 pm
- Forum: Conjugate Acids & Bases
- Topic: Conjugate acids vs conjugate base
- Replies: 12
- Views: 79
Re: Conjugate acids vs conjugate base
The conjugate acid has an addition H+ while the conjugate base takes away an H+
- Sun Dec 06, 2020 4:53 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Dentates
- Replies: 7
- Views: 90
Re: Dentates
By counting the number of lone pairs
- Fri Nov 27, 2020 10:44 am
- Forum: Hybridization
- Topic: SeF3+
- Replies: 5
- Views: 3490
Re: SeF3+
Helena Xu 1I wrote:SebastianCastellanos2L wrote:Would the hybridization scheme then be sp3?
Yes, because there are four regions of electron density, which means four hybrid orbitals are needed (one s-orbital and three p-orbitals).
Can someone explain how to find the hybridization scheme? I don't get it
- Fri Nov 27, 2020 10:41 am
- Forum: Resonance Structures
- Topic: Resonance Structures and Energy
- Replies: 21
- Views: 137
Re: Resonance Structures and Energy
Yes! that's correct
- Fri Nov 27, 2020 10:40 am
- Forum: General Science Questions
- Topic: Grade Breakdown
- Replies: 35
- Views: 384
Re: Grade Breakdown
Adrienne Yuh 2C wrote:I don't think he mentions anything on this, but he does say 50% or higher is required to pass with a C- or higher.
I saw that too and was so confused... He is saying if you earn a 50% in the class you automatically pass?
- Fri Nov 27, 2020 10:37 am
- Forum: Student Social/Study Group
- Topic: Final Exam Tips
- Replies: 24
- Views: 146
Re: Final Exam Tips
Im reviewing all the homework problems and the module quizzes
- Fri Nov 27, 2020 10:36 am
- Forum: General Science Questions
- Topic: Finals
- Replies: 39
- Views: 426
Re: Finals
How many multiple choice questions is it? Do we know?
- Sat Nov 21, 2020 8:48 am
- Forum: Hybridization
- Topic: pi bonds
- Replies: 12
- Views: 262
Re: pi bonds
When two p orbitals overlap they form a pi bond
- Sat Nov 21, 2020 8:45 am
- Forum: Sigma & Pi Bonds
- Topic: Hybridization
- Replies: 7
- Views: 92
Re: Hybridization
Yup! that's what it is I believe
- Sat Nov 21, 2020 8:39 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Stable Structures
- Replies: 10
- Views: 80
Re: Stable Structures
It depends what the question is asking. Sometimes you will need to draw all resonance structures while other times you will be asked to draw the most stable structure... it just depends. When in doubt being able to determine the most stable structure is very helpful.
- Sat Nov 21, 2020 8:38 am
- Forum: Bond Lengths & Energies
- Topic: Boiling vs. Melting Point
- Replies: 15
- Views: 105
Re: Boiling vs. Melting Point
They are two completely separate phase changes. The boiling point is when a liquid becomes a gas and the melting point is when a solid becomes a liquid. The boiling point is a higher temperature than the melting point. We often measure the durability of a molecule based on the values of the melting ...
- Sat Nov 21, 2020 8:35 am
- Forum: Lewis Structures
- Topic: Central Atom Question
- Replies: 20
- Views: 160
Re: Central Atom Question
like everyone said H can only bond once and cannot have an expanded octet like nitrogen so it will never be a central atom
- Sat Nov 14, 2020 1:53 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm #2 Content
- Replies: 4
- Views: 40
Re: Midterm #2 Content
ya that will probably be on midterm 2
- Sat Nov 14, 2020 1:49 pm
- Forum: Electronegativity
- Topic: Periodic Table Trend
- Replies: 37
- Views: 398
Re: Periodic Table Trend
Ionization energy and electronegativity both decrease down a group and increase across a period. As you move to the right the electrostatic attraction increase because the elements have more protons. As you move downwards the electrostatic attraction decreases as the the electrons move farther and f...
- Sat Nov 14, 2020 1:48 pm
- Forum: Student Social/Study Group
- Topic: Participation
- Replies: 45
- Views: 403
Re: Participation
its on ccle under grades. he emailed a link
- Sat Nov 14, 2020 1:46 pm
- Forum: Sigma & Pi Bonds
- Topic: Sigma vs Pi
- Replies: 1
- Views: 29
Re: Sigma vs Pi
So sigma and pi bonds form when the atomic orbitals overlap... When a sigma bond forms, it is end to end overlapping while with a Pi bond the lobe of one atomic orbital overlaps the other. A sigma bond is a covalent bond from the direct overlap of orbitals while Pi bond is the parallel overlap of p ...
- Sat Nov 14, 2020 1:43 pm
- Forum: Student Social/Study Group
- Topic: Midterm 2
- Replies: 22
- Views: 135
Re: Midterm 2
I am probably going to do what I did for the last midterm which was review my notes and then do all the quizzes on the website modules and review hw problems. It worked well for me last time
- Thu Nov 05, 2020 1:48 pm
- Forum: General Science Questions
- Topic: Midterm Grades
- Replies: 30
- Views: 356
Re: Midterm Grades
Yes grades are up! I too would love to be able to review what I got wrong if possible.
- Thu Nov 05, 2020 1:46 pm
- Forum: Ionic & Covalent Bonds
- Topic: Electron Affinity
- Replies: 5
- Views: 44
Re: Electron Affinity
Cl?!?! is my guess :)
- Thu Nov 05, 2020 1:45 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm 1
- Replies: 9
- Views: 125
Re: Midterm 1
He just posted! Though I don't know if you can see the problems and which ones you actually got wrong...
- Thu Nov 05, 2020 1:44 pm
- Forum: Student Social/Study Group
- Topic: Studying Tips
- Replies: 23
- Views: 167
Re: Studying Tips
For this class in particular what I have been doing is reviewing my notes, then doing the practice test modules on his websites and then really diving into the concepts I get wrong from there. That way your studying is focused around needed areas and not nearly as time consuming
- Thu Nov 05, 2020 1:40 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm 1 Review
- Replies: 7
- Views: 57
Re: Midterm 1 Review
Yes I'm with you two!!! Would love to review my test if possible
- Wed Nov 04, 2020 10:47 am
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Combustion analysis rounding
- Replies: 5
- Views: 83
Re: Combustion analysis rounding
I write the rounded version on my paper but keep the unrounded answer in my calculator. Then I round at the very end so its accurate. You can round if you want I think!
- Wed Nov 04, 2020 10:43 am
- Forum: Lewis Structures
- Topic: How do we know when an element will have more than 8 electrons?
- Replies: 6
- Views: 29
Re: How do we know when an element will have more than 8 electrons?
One way to tell is by looking at which orbital it lands on. For example, certain molecules on n=3 will be able to accept more electrons. Typically you will know based on the total number of valence electrons you calculate at the beginning of the problem and then you can look at the sub shells to dou...
- Wed Nov 04, 2020 10:40 am
- Forum: Lewis Structures
- Topic: Sulfate Ion Lewis Structure
- Replies: 3
- Views: 21
Re: Sulfate Ion Lewis Structure
Given that sulfur has n=3 orbitals where l=2 in the d subshell, l=1 in the p sub shell, and l=0 in the s sub shell, the atom can accept an extra pair in the available d sub shell as s and p are already filled.
- Wed Nov 04, 2020 10:36 am
- Forum: Octet Exceptions
- Topic: Expanded Octet of Phosphorus
- Replies: 4
- Views: 48
Re: Expanded Octet of Phosphorus
If I understand correctly, the reason phosphorus can have an expanded octet is because it has enough orbitals (n=3) to accept additional electrons. When n=3 the 3d sub shell is also available (we learned that n=3 has d, p, and s on that chart from lecture a few weeks ago). A regular octet would just...
- Wed Nov 04, 2020 10:29 am
- Forum: Lewis Structures
- Topic: Electrons in Lewis Structures
- Replies: 8
- Views: 41
Re: Electrons in Lewis Structures
Like they said above the number valence electrons in each element is the same as the group number up until 13-18. Then you must subtract 10 from the group number. Next, you add up the amount of electrons to get the total number. Don't forget to multiply by the number of each element if more than one...
- Wed Oct 28, 2020 1:15 pm
- Forum: Photoelectric Effect
- Topic: Work Function
- Replies: 3
- Views: 41
Re: Work Function
yes you are right about needing to convert
- Wed Oct 28, 2020 1:12 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: ground state electron configuration
- Replies: 2
- Views: 23
Re: ground state electron configuration
Adding on to that question I am a bit confused by the excited state. If it is when the electrons are less stable couldn't the configuration indicate a high or a lower energy level than the element actually has in their ground state? Or can is only be a higher energy level?
- Wed Oct 28, 2020 1:09 pm
- Forum: Properties of Light
- Topic: How to remember what v is in equations
- Replies: 46
- Views: 277
Re: How to remember what v is in equations
Yes, the font is different depending on if it stands for frequency or velocity. But also understanding what each equation means will help. Ex. Typically if wavelength is involved, they are referring to v as frequency. versus if mass is involved they are probably using velocity.
- Wed Oct 28, 2020 12:59 pm
- Forum: Trends in The Periodic Table
- Topic: Elements with a low ionization energy
- Replies: 6
- Views: 62
Re: Elements with a low ionization energy
A low ionization energy indicates that the electrostatic attraction between the electrons and the nucleus is weaker thus requiring less energy to remove an electron. Atoms that lose electrons become positive ions.
- Wed Oct 28, 2020 12:54 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configuration
- Replies: 4
- Views: 29
Re: Electron Configuration
I would write it the second way since technically that is the format we were given
- Wed Oct 21, 2020 2:25 pm
- Forum: Administrative Questions and Class Announcements
- Topic: The Midterm Topics
- Replies: 5
- Views: 70
Re: The Midterm Topics
As far as I am aware that should not be included on the midterm. I suggest looking over the learning outcomes 1 and 2 as well as doing the visual and audio focus modules on the website. Review lecture content and all hw up to #19 on the latest assignment. Hope this helps!
- Wed Oct 21, 2020 10:36 am
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Calculating Delta P
- Replies: 3
- Views: 46
Calculating Delta P
When calculating delta P as shown in the electron example during lecture, we checked the validity of the value by then evaluating delta V. Should we always do this when finding delta P to assert if it is a correct atomic model or was this simply for lecture purposes?
- Wed Oct 21, 2020 10:30 am
- Forum: General Science Questions
- Topic: Equation Sheet for Tests
- Replies: 5
- Views: 73
Equation Sheet for Tests
Will the equation sheet we are given also include the value of constants such as h that we use in the equations?
- Tue Oct 20, 2020 1:38 pm
- Forum: DeBroglie Equation
- Topic: De Brogile Wavelength Car Ex. from Lecture 8
- Replies: 7
- Views: 82
De Brogile Wavelength Car Ex. from Lecture 8
In the lecture, the De Brogile example asked for the wavelength of a car given a mass and velocity. It then asks if that wavelength is measurable. The wavelength is 1.64x10^-38m. Lavelle said that no, this would not be a detectible wavelength. My question is what determines if it is detectible? How ...
- Mon Oct 19, 2020 4:50 pm
- Forum: Photoelectric Effect
- Topic: Energy Per Photon
- Replies: 2
- Views: 44
Energy Per Photon
I am still bit confused on the idea of energy per photon in the photoelectric effect. In an earlier lecture Lavelle was saying how the intensity of the light is not what ejects electrons but rather the frequency of the light. He said that increasing intensity of the light increases the number of pho...
- Sun Oct 18, 2020 1:04 pm
- Forum: General Science Questions
- Topic: Writing Formulas
- Replies: 10
- Views: 79
Re: Writing Formulas
Equations are given I believe but it can't hurt to familiarize yourself with it!
- Sun Oct 18, 2020 1:00 pm
- Forum: Properties of Light
- Topic: Frequency vs Wavelength
- Replies: 22
- Views: 167
Re: Frequency vs Wavelength
Yes! Wavelength is in a sense dependent on frequency. Higher frequencies have higher energy thus determining wavelength
- Sun Oct 18, 2020 12:55 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Exams
- Replies: 12
- Views: 101
Re: Exams
Yes. Probably best to use a paper and pen unless you can install the program that locks the screen like we are doing for our computer for the actual exam.
- Wed Oct 14, 2020 2:04 pm
- Forum: Properties of Light
- Topic: Photoelectric spectrum
- Replies: 24
- Views: 190
Re: Photoelectric spectrum
I believe we will also have access to something like this... https://www.123rf.com/photo_110493048_stock-illustration-visible-light-diagram-color-electromagnetic-spectrum-light-wave-frequency-educational-school-physics.html to help us evaluate questions such as the one on the homework
- Wed Oct 14, 2020 1:51 pm
- Forum: Significant Figures
- Topic: Sig Fig Process
- Replies: 13
- Views: 112
Re: Sig Fig Process
Similarly to the posts above, it is best to wait until the very end to round sig figs as your answer will be more accurate. Often times I will round sig figs on paper for each step but keep the original numbers stored in my calculator so that my answer still comes out closest to the actual answer. H...