Search found 101 matches
- Sat Mar 14, 2020 2:43 pm
- Forum: Administrative Questions and Class Announcements
- Topic: "Open Book" Final?
- Replies: 30
- Views: 2091
Re: "Open Book" Final?
open book means anything that would help you. I wouldnt get too stuck up on the notes though or you may run out of time
- Sat Mar 14, 2020 2:32 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Take Home Final
- Replies: 16
- Views: 1033
Re: Take Home Final
it will be 3-4 hours with only 6 questions, so it is plenty of time to print, write on, scan, and upload the final.
- Sat Mar 14, 2020 2:28 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Printing for Final
- Replies: 9
- Views: 739
Re: Printing for Final
i would guess that yes printing out the test, then either scanning it or taking a picture of it to upload it to CCLE would be the way to go
- Sat Mar 14, 2020 2:26 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Concentration Cells
- Replies: 8
- Views: 734
Re: Concentration Cells
Sara Richmond 2K wrote:Does the cell flow from anode to cathode or cathode to anode? which has the higher concentration anode or cathode?
electrons always flow from anode to cathode
- Sat Mar 14, 2020 2:21 pm
- Forum: Balancing Redox Reactions
- Topic: Test 2 Return
- Replies: 20
- Views: 1208
Re: Test 2 Return
our TA dropped our tests off in the TA mailroom in Young. I would double-check with your TA but it is most likely there.
- Fri Mar 13, 2020 2:30 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Pressure and Molarity
- Replies: 3
- Views: 314
Re: Pressure and Molarity
use ice table to concentrations at k then just put products over reactants
- Fri Mar 13, 2020 2:14 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 149989
Re: Reading the textbook
i would use the textbook only when i am completely lost on a topic. so fair it has worked out for me
- Fri Mar 13, 2020 2:12 pm
- Forum: Hybridization
- Topic: Charges
- Replies: 9
- Views: 1090
Re: Charges
yes show the charge, if not it is assumed neutral
- Fri Mar 13, 2020 2:03 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: deltaG at equilibrium
- Replies: 8
- Views: 729
Re: deltaG at equilibrium
You’re right the difference is that delta G naught is at standard conditions. Delta G naught is always the same because it is referring to when the reactant/products are at standard conditions. Would that mean standard conditions are not always at equilibrium? YES! Exactly. Delta G naught DOES NOT ...
- Fri Mar 13, 2020 2:01 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Entropy of Surroundings vs. System
- Replies: 3
- Views: 375
Re: Entropy of Surroundings vs. System
if the entropy of surroundings is positive that means there is more and vice versa.
- Fri Mar 13, 2020 1:53 pm
- Forum: Van't Hoff Equation
- Topic: When to use
- Replies: 15
- Views: 1056
Re: When to use
it can be used to find K, change in T, and enthalpy
- Fri Mar 13, 2020 1:42 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: deltaG at equilibrium
- Replies: 8
- Views: 729
Re: deltaG at equilibrium
Yes, because of the equation: delta(G) = delta(G0) + RTln(Q) and since we are at equilibrium, Q=K as well as delta(G0) = -RTln(K). So if you plug things back in, you get delta(G) = -RTln(K) + RTln(K) which equals 0 I thought that delta G naught, was just at standard conditions not equilibrium? You’...
- Fri Mar 13, 2020 1:36 pm
- Forum: *Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
- Topic: Will the Final for 14B have Identification?
- Replies: 9
- Views: 5975
Re: Will the Final for 14B have Identification?
no it will not be on the final
- Fri Mar 13, 2020 1:33 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: How do you know if something is a salt solution?
- Replies: 6
- Views: 730
Re: How do you know if something is a salt solution?
in this class all you really need to know is that a salt solution will dissociate into ions in water, meaning it will turn into an acid or base
- Thu Mar 12, 2020 11:32 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: how to find pkb
- Replies: 2
- Views: 348
how to find pkb
how do we find pkb from poh.
- Wed Mar 04, 2020 7:24 pm
- Forum: Balancing Redox Reactions
- Topic: Half rxns
- Replies: 27
- Views: 1477
Re: Half rxns
with acidic you add H+, basic add oh-
- Wed Mar 04, 2020 7:21 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Nernst
- Replies: 10
- Views: 766
Nernst
When should we use logQ vs lnQ.
- Wed Mar 04, 2020 7:17 pm
- Forum: Balancing Redox Reactions
- Topic: Half reactions
- Replies: 6
- Views: 473
Half reactions
Do we add h20 or h+ first when balancing a half-reaction in acidic solution.
- Wed Mar 04, 2020 7:16 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: How to
- Replies: 1
- Views: 213
Re: How to
Use the equation Delta Naught G= Delta Naught H - T(Delta Naught S)
- Wed Mar 04, 2020 7:15 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Galvanic Cell
- Replies: 2
- Views: 280
Re: Galvanic Cell
A cell that gets its electrical energy from spontaneous redox reactions.
- Tue Feb 25, 2020 9:00 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Work
- Replies: 14
- Views: 1013
Re: Work
on system= positive, by system=negative
- Tue Feb 25, 2020 8:56 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Negative work
- Replies: 14
- Views: 951
Re: Negative work
if a system is negative, then it just has done work
- Tue Feb 25, 2020 8:53 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: nernst 2
- Replies: 3
- Views: 296
nernst 2
what units is it in.
- Tue Feb 25, 2020 8:51 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: nerst
- Replies: 7
- Views: 536
nerst
how do we get the moles in nerst.
- Tue Feb 25, 2020 8:49 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagrams
- Replies: 4
- Views: 317
Re: Cell Diagrams
i dont think it matters
- Tue Feb 25, 2020 8:47 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagrams
- Replies: 3
- Views: 289
Re: Cell Diagrams
usually pt if not a good conductor
- Tue Feb 25, 2020 8:42 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Standard Cell Potential
- Replies: 4
- Views: 301
Re: Standard Cell Potential
E naught is E standard.
- Tue Feb 18, 2020 10:52 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: delta g vs delta g°
- Replies: 2
- Views: 250
delta g vs delta g°
What is the difference between Delta g vs delta g°.
thanks
thanks
- Tue Feb 18, 2020 10:46 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs Free naught
- Replies: 2
- Views: 242
Re: Gibbs Free naught
Q is quotient at any point in the reaction, and K is constant at equilibrium. You will always use both with this equation.
- Tue Feb 18, 2020 10:35 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Spontaneous
- Replies: 20
- Views: 1259
Spontaneous
What makes a reaction spontaneous, based on the value of Gibb's Free Energy.
- Tue Feb 18, 2020 10:21 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Adiabatic systems
- Replies: 3
- Views: 334
Adiabatic systems
So for adiabatic systems, will q ALWAYS equal 0?
- Tue Feb 18, 2020 10:20 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Adiabatic systems
- Replies: 14
- Views: 831
Adiabatic systems
So for adiabatic systems, will q ALWAYS equal 0?
- Tue Feb 18, 2020 10:17 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Reversible Systems
- Replies: 4
- Views: 457
Reversible Systems
What is the difference between reversible and irreversible systems?
- Mon Feb 10, 2020 11:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm dates
- Replies: 11
- Views: 502
Re: Midterm dates
everything up to first half of thermodynamics, with an emphasis on material after test 1.
- Mon Feb 10, 2020 1:32 am
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Conversion
- Replies: 3
- Views: 239
Midterm Conversion
will we be given the conversion rate of L*atm to J or will we have to memorize that?
- Mon Feb 10, 2020 1:25 am
- Forum: Administrative Questions and Class Announcements
- Topic: Pizza Rolls REVIEW Session DOWNLOAD HERE
- Replies: 67
- Views: 5736
Re: Pizza Rolls REVIEW Session DOWNLOAD HERE
Naren_Ramesh_4F wrote:Will the answer key be posted on Chemistry Community?
Yes they are usually but after the review session.
- Mon Jan 27, 2020 2:05 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Reaction Shifts Left or Right
- Replies: 15
- Views: 591
Re: Reaction Shifts Left or Right
It will shift to the left.
- Mon Jan 27, 2020 2:03 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: pKa to Kb
- Replies: 12
- Views: 641
Re: pKa to Kb
14 minus the kPa will equal the pKb. Then Kb is equal 10 to the negative pKb.
- Mon Jan 27, 2020 1:55 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: calculating % ionization
- Replies: 4
- Views: 261
Re: calculating % ionization
You divide the concentration of the acid ion but the initial concentration of the acid itself.
- Mon Jan 27, 2020 1:48 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: checking approximation
- Replies: 4
- Views: 125
Re: checking approximation
Yes, it doesn't happen often but it is best to always check.
- Mon Jan 27, 2020 1:38 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Exothermic reaction
- Replies: 18
- Views: 724
Re: Exothermic reaction
For reactions that are exothermic, a shift to the left means we are increasing the temperature and a shift to the right means we are decreasing the temperature
- Mon Jan 20, 2020 3:39 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Relationship between pressure and volume
- Replies: 10
- Views: 426
Re: Relationship between pressure and volume
They are inversely proportional.
- Mon Jan 20, 2020 3:37 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Ice Tables
- Replies: 4
- Views: 138
Re: Ice Tables
Ice tables are used for partial pressures and concentrations in weak acids and bases.
- Mon Jan 20, 2020 3:30 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Adding Inert Gas
- Replies: 9
- Views: 572
Re: Adding Inert Gas
Diana A 2L wrote:What is considered an inert gas? Do we have to remember a list of them or is there a way to tell if a gas is inert?
An inert gas is just any noble gas.
- Mon Jan 20, 2020 3:26 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: q vs k
- Replies: 62
- Views: 2617
Re: q vs k
When Q reaches K, it is at equilibrium.
- Mon Jan 20, 2020 2:55 am
- Forum: Ideal Gases
- Topic: PV=nRT
- Replies: 13
- Views: 696
Re: PV=nRT
In this class, we will mainly focus on the use of PV=nRT to find concentration or pressure.
- Sun Jan 12, 2020 9:46 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: changing conditions
- Replies: 6
- Views: 272
Re: changing conditions
The reaction will want to be balanced between the products and reactants, so there will be a shift to the products side.
- Sun Jan 12, 2020 9:25 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Using the "ICE" box
- Replies: 8
- Views: 261
Re: Using the "ICE" box
Only gas and aqueous are included, never liquids and solids.
- Sun Jan 12, 2020 8:44 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Test 1
- Replies: 6
- Views: 257
Re: Test 1
The first test will not be this week, but week 3.
- Sun Jan 12, 2020 8:42 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: memorization
- Replies: 12
- Views: 600
Re: memorization
You won´t need to memorize anything but you will either be given it or be expected to calculate it.
- Sun Jan 12, 2020 8:39 pm
- Forum: Ideal Gases
- Topic: Kc vs Kp
- Replies: 5
- Views: 304
Re: Kc vs Kp
Also, when answering, make sure each concentration is in brackets while pressure will be in parenthesis.
- Sat Dec 07, 2019 10:32 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: Titrations
- Replies: 6
- Views: 439
Re: Titrations
So nothing with titration equations?
- Sat Dec 07, 2019 10:27 pm
- Forum: Bronsted Acids & Bases
- Topic: Hydrogen Bonding
- Replies: 16
- Views: 1104
Re: Hydrogen Bonding
No it is not an acid base reaction.
- Sat Dec 07, 2019 10:25 pm
- Forum: Air Pollution & Acid Rain
- Topic: acid rain
- Replies: 5
- Views: 530
Re: acid rain
Is that all that was focused on for acid rain?
- Sat Dec 07, 2019 10:15 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: when to use what equation
- Replies: 5
- Views: 296
Re: when to use what equation
Ka and Kb is for weak acids and bases.
- Sat Dec 07, 2019 10:10 pm
- Forum: Lewis Acids & Bases
- Topic: Strong/Weak Acids and Bases
- Replies: 4
- Views: 501
Strong/Weak Acids and Bases
Is there a list of the most important strong/ weak acids and bases that we should memorize for the final.
- Mon Dec 02, 2019 12:00 am
- Forum: Conjugate Acids & Bases
- Topic: Definition
- Replies: 7
- Views: 497
Re: Definition
Conjugate base- acid loses hydrogen, conjugate acid- base gains hydrogen
- Sun Dec 01, 2019 11:59 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Strong and Weak Acids
- Replies: 7
- Views: 545
Re: Strong and Weak Acids
It is probably best to just memorize the list of strong bases and acids.
- Sun Dec 01, 2019 11:57 pm
- Forum: Bronsted Acids & Bases
- Topic: Final
- Replies: 13
- Views: 854
Re: Final
The final should be cumulative, with all topics of the syllabus being covered. I assume there would be a focus on the topics after the midterm.
- Sun Dec 01, 2019 11:39 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Bond strength and strength of acid.
- Replies: 6
- Views: 450
Re: Bond strength and strength of acid.
The weaker or longer the bond, the stronger the acid.
- Sun Dec 01, 2019 11:36 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: calculating pH
- Replies: 4
- Views: 629
Re: calculating pH
For strong acids and bases, we will have to calculate the pH. However, for weak acids and bases, we will have to compare which would be relatively stronger or weaker.
- Sun Nov 24, 2019 10:01 pm
- Forum: Amphoteric Compounds
- Topic: Amphiprotic
- Replies: 11
- Views: 612
Re: Amphiprotic
Amphiprotic= a substance that can both accept and donate a proton (has characteristics of both an acid and a base) amphiprotic vs. amphoteric: -a substance is amphoteric when its reaction acts as an acid and as a base -amphiprotic only applies to protic compounds Does a Protic compound just mean it...
- Sun Nov 24, 2019 9:51 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Why HF is a weaker acid than HCl
- Replies: 17
- Views: 16275
Re: Why HF is a weaker acid than HCl
405021651 wrote:does a bigger radius mean a stronger acid or is it the other way around??
Yes that is correct.
- Sun Nov 24, 2019 9:25 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: IMF [ENDORSED]
- Replies: 6
- Views: 949
Re: IMF [ENDORSED]
Induced dipole is when there is a molecule that is not polar or has no dipole moment, but then it experiences a temporary dipole moment because of the dipole moment of another molecule. A dipole dipole moment is where there are two molecules that experience attraction between the partially positive...
- Sun Nov 24, 2019 8:52 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Bronsted acids
- Replies: 5
- Views: 511
Re: Bronsted acids
So would it be Bronsted Acid + Bronsted Base -> Conjugate Acid + Conjugate Base?
- Sun Nov 24, 2019 8:31 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: How to tell?
- Replies: 11
- Views: 952
Re: How to tell?
Given a chemical equation, you can determine which substance is the acid by counting the hydrogens on each substance before and after the reaction. If the number of hydrogens has decreased, that substance is an acid since acids are hydrogen ion donors. Is there any way to confirm if it is an acid o...
- Sun Nov 17, 2019 10:55 pm
- Forum: Student Social/Study Group
- Topic: What will Test 2 be on?
- Replies: 8
- Views: 576
Re: What will Test 2 be on?
Everything we covered since the midterm and up to the slides about pi and sigma bonds that well go over in class on Monday. Probably focus on outline 3 and 4.
- Sun Nov 17, 2019 10:45 pm
- Forum: Student Social/Study Group
- Topic: Class Grading
- Replies: 44
- Views: 3727
Re: Class Grading
It can be curved up if the class percentage is much lower than anticipated so I wouldn't count on it. I would focus on getting at just the 250 points required for the C- is your main goal is just to pass.
- Sun Nov 17, 2019 10:23 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Dispersion
- Replies: 5
- Views: 345
Re: Dispersion
Kennedi3K wrote:Will we have to know about dispersion and induced dipole for test 2? Or is it only London forces, dipole-dipole, and hydrogen bonding?
Going over induced dipole wouldn't hurt, but I would focus on the main three of London, DD, and H bonding.
- Sun Nov 17, 2019 9:52 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: This Week Test
- Replies: 12
- Views: 769
Re: This Week Test
JasonKwon_3k wrote:Are Sigma and Pi bonds gonna be the last topic that will be on the test.
Yes, I do believe so.
- Sun Nov 17, 2019 9:51 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR Model
- Replies: 3
- Views: 190
Re: VSEPR Model
You should know the bond angles and shape names.
- Sun Nov 10, 2019 8:10 pm
- Forum: General Science Questions
- Topic: London
- Replies: 4
- Views: 342
Re: London
It is one of the intermolecular forces, and is the weakest.
- Sun Nov 10, 2019 6:22 pm
- Forum: Student Social/Study Group
- Topic: Midterm Average
- Replies: 12
- Views: 831
Midterm Average
I know he is planning on releasing the midterm grades on Wednesday, but does anyone know if will the average will be included as well?
- Sun Nov 10, 2019 6:17 pm
- Forum: Student Social/Study Group
- Topic: midterm grades
- Replies: 8
- Views: 509
Re: midterm grades
I am pretty sure he said that we will see our grades after the Wednesday lecture. Not sure about when or if we get back the physical midterm.
- Sun Nov 10, 2019 5:05 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Water molecules
- Replies: 9
- Views: 968
Re: Water molecules
It will use both hydrogens
- Sun Nov 10, 2019 4:55 pm
- Forum: Hybridization
- Topic: Noble Configuration vs. Full
- Replies: 7
- Views: 344
Re: Noble Configuration vs. Full
They will usually tell you if you need to use shorthand or the full configuration. If not, noble gas should be fine.
- Sun Nov 03, 2019 10:54 pm
- Forum: DeBroglie Equation
- Topic: When to use the DeBroglie equation?
- Replies: 6
- Views: 376
Re: When to use the DeBroglie equation?
Ayushi2011 wrote:Any particle with wavelike properties that has momentum. They will give us the mass and velocity.
And to have wavelike properties it just has to be over 10^'15 correct?
- Sun Nov 03, 2019 10:49 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: Polar v nonPolar
- Replies: 4
- Views: 1075
Re: Polar v nonPolar
To add on to the previous reply, one needs to know an element's general electronegativity to tell whether a molecule is polar or not. The electronegativity trend is shown on the periodic table as increasing from bottom-left to top-right (with some exceptions). So if a molecule is made of atoms on o...
- Sun Nov 03, 2019 10:43 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Rules for n, l,m
- Replies: 11
- Views: 615
Re: Rules for n, l,m
n = energy level
l = can be numbers (n-1)
ms = can be -1/2 or + 1/2
l = can be numbers (n-1)
ms = can be -1/2 or + 1/2
- Sun Nov 03, 2019 10:24 pm
- Forum: Hybridization
- Topic: Pi bonds
- Replies: 8
- Views: 992
Re: Pi bonds
Iona Pay wrote:I found this video helpful for understanding the hybridization of pi bonds.
https://www.khanacademy.org/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/v/pi-bonds-and-sp2-hybridized-orbitals
This video is very helpful. Thanks for sharing
- Sun Nov 03, 2019 10:03 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Writing e- Configurations
- Replies: 15
- Views: 683
Re: Writing e- Configurations
Unless stated in the problem, it won´t matter which you choose. If you are still unsure, it wouldn´t hurt to write it all out.
- Sun Oct 27, 2019 11:27 pm
- Forum: Naming
- Topic: Naming Compounds (general question)
- Replies: 9
- Views: 475
Re: Naming Compounds (general question)
memorization is most likely not necessary, and if it is needed, it will probably be given to us
- Sun Oct 27, 2019 11:25 pm
- Forum: Bond Lengths & Energies
- Topic: Delocalization
- Replies: 3
- Views: 178
Re: Delocalization
Delocalization will occur in all resonance structures.
- Sun Oct 27, 2019 11:11 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Expanded Valence Shells
- Replies: 5
- Views: 225
Re: Expanded Valence Shells
Michelle Shin 4B wrote:The elements P, S, and Cl can accommodate more than 8 valence electrons since atoms in period 3 or higher have d-orbitals that can accommodate more electrons.
Are they the only three that can do this?
- Sun Oct 27, 2019 11:06 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionization Energy Unit
- Replies: 6
- Views: 206
Re: Ionization Energy Unit
Units are in kJ/mol
- Sun Oct 27, 2019 11:02 pm
- Forum: Ionic & Covalent Bonds
- Topic: Resonance Structures
- Replies: 5
- Views: 146
Re: Resonance Structures
I wish that were the case, but I'm pretty sure you have to draw each electron as a dot unless it is being shared.
- Sun Oct 20, 2019 10:47 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Why is 4s before 3d?
- Replies: 9
- Views: 983
Re: Why is 4s before 3d?
This is because 4s has a lower energy and is easier to fill up. This will very likely be on the midterm.
- Sun Oct 20, 2019 10:45 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Rydberg equation [ENDORSED]
- Replies: 73
- Views: 9012
Re: Rydberg equation [ENDORSED]
TimVintsDis3C wrote:Are all of these equations meant to be memorized, or will they be provided on tests?
Most equations are on the reference sheet on the test. That being said it does not hurt to memorize or at least be very familiar with them.
- Sun Oct 20, 2019 10:43 pm
- Forum: General Science Questions
- Topic: Test #1
- Replies: 6
- Views: 326
Re: Test #1
Percent yield will always be multiplied by 100 to get the percentage.
- Sun Oct 20, 2019 10:40 pm
- Forum: DeBroglie Equation
- Topic: Deriving the DeBrogile Equation
- Replies: 8
- Views: 388
Re: Deriving the DeBrogile Equation
Usually it is useful to be able to derive a simpler equation like this, as the derivation can be helpful for a question of a test.
- Sun Oct 20, 2019 10:38 pm
- Forum: Properties of Electrons
- Topic: Mass of Proton, Electron and Neutron
- Replies: 2
- Views: 152
Mass of Proton, Electron and Neutron
Will we have to memorize the masses for each or will it be included on the reference sheet?
- Sun Oct 13, 2019 11:23 pm
- Forum: Photoelectric Effect
- Topic: Question from module
- Replies: 5
- Views: 206
Re: Question from module
Timmy Nguyen Dis 3F wrote:You could just use the mass of the electron, since it's going to be one of those numbers that are given on exams.
Is the mass of an electron on the reference sheet?
- Sun Oct 13, 2019 11:18 pm
- Forum: Properties of Light
- Topic: Atomic Spectra
- Replies: 3
- Views: 195
Re: Atomic Spectra
I am pretty sure that is all you need to know, since that is all he mentioned in lecture.
- Sun Oct 13, 2019 11:14 pm
- Forum: Properties of Light
- Topic: What is Threshold Energy?
- Replies: 9
- Views: 750
Re: What is Threshold Energy?
If I remember correctly, Threshold Energy is the minimum amount of energy needed to eject electrons from the surface.
- Sun Oct 13, 2019 11:08 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Test 1 [ENDORSED]
- Replies: 107
- Views: 20482
Re: Test 1 [ENDORSED]
Angstroms are a unit of length equivalent to 10^(-10) m. I was taken aback by this question on the test as I do not ever remember being told we had to memorize the quant. value of Angstroms. Did I miss that in class, and if not how are we supposed to know what units/terms we are supposed the memori...
- Sun Oct 13, 2019 11:05 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Best Way To Study?
- Replies: 56
- Views: 3503
Re: Best Way To Study?
I find personally that the best way to study is to complete the modules before anything, they are a great introduction and really help me grasp the concept that is being presented. Next I'll give a go at the homework problems that were assigned and if I have any problems with those I will do more pr...
- Thu Oct 03, 2019 12:35 am
- Forum: Limiting Reactant Calculations
- Topic: M 19
- Replies: 2
- Views: 119
M 19
I am not sure how to get the mass of Oxygen. I was able to get the mass of C, H, and N, but am confused on what to do from here.
- Wed Oct 02, 2019 11:51 pm
- Forum: Empirical & Molecular Formulas
- Topic: Naming Molecular Compounds
- Replies: 6
- Views: 459
Naming Molecular Compounds
I am a little confused as to how to name compounds. I understand simple ones such as molecular compounds, but I can't seem to remember how to name compounds such as in H.25, when it asks to "name the different phosphorus oxides".
- Wed Oct 02, 2019 12:59 am
- Forum: Molarity, Solutions, Dilutions
- Topic: Empirical and Molecular Formulas
- Replies: 13
- Views: 635
Re: Empirical and Molecular Formulas
I find the easiest way to remember is just to think of molar mass first whenever I hear molecular formula.
- Wed Oct 02, 2019 12:57 am
- Forum: Significant Figures
- Topic: General Rules to Help with Sig Figs
- Replies: 18
- Views: 1055
Re: General Rules to Help with Sig Figs
I am confused as to when to apply sig figs. Should I apply them throughout my problem at each step, or just at the end?