Search found 125 matches
- Sun Mar 15, 2020 12:52 pm
- Forum: First Order Reactions
- Topic: order of a reaction
- Replies: 6
- Views: 469
Re: order of a reaction
you add the exponents for the overall order
- Sun Mar 15, 2020 12:51 pm
- Forum: Biological Examples (*DNA Structural Transitions, etc.)
- Topic: Examples Expected to Know
- Replies: 15
- Views: 1864
Re: Examples Expected to Know
Usually what is covered in lecture
- Sun Mar 15, 2020 12:50 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Kelvin or Celsius?
- Replies: 86
- Views: 5724
Re: Kelvin or Celsius?
Kelvin
- Sun Mar 15, 2020 12:50 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Athena
- Replies: 34
- Views: 3186
Re: Athena
Thank you for all your help Lavelle!
- Sun Mar 15, 2020 12:49 pm
- Forum: First Order Reactions
- Topic: Kinetics Review Session
- Replies: 2
- Views: 484
Re: Kinetics Review Session
How do you do #5?
- Sat Mar 14, 2020 6:51 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: irreversible expansion of ideal gas
- Replies: 3
- Views: 389
Re: irreversible expansion of ideal gas
Is W always zero for irreversible expansion?
- Mon Mar 09, 2020 11:28 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Reactant order
- Replies: 4
- Views: 332
Re: Reactant order
How do you know which reactions to compare?
- Mon Mar 09, 2020 11:26 am
- Forum: General Rate Laws
- Topic: Overall rate law
- Replies: 8
- Views: 651
Re: Overall rate law
I think its because the entire reaction depends on the slowest step.
- Mon Mar 09, 2020 11:25 am
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: reaction rate vs average reaction rate
- Replies: 5
- Views: 533
Re: reaction rate vs average reaction rate
How do we apply these different rates?
- Mon Mar 09, 2020 11:24 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Rate laws for reaction mechanisms
- Replies: 3
- Views: 304
Re: Rate laws for reaction mechanisms
He said we're only doing pre-equlbrium analysis
- Mon Mar 09, 2020 11:23 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Catalysts
- Replies: 8
- Views: 514
Re: Catalysts
providing a alternate pathway and weakening bonds
- Sun Mar 01, 2020 5:07 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: identifying cathode/anode
- Replies: 4
- Views: 383
identifying cathode/anode
How do you know which is anode/cathode if both species is decreasing in oxidation state for instance?
- Sun Mar 01, 2020 5:06 pm
- Forum: Balancing Redox Reactions
- Topic: anode/cathod reversible
- Replies: 4
- Views: 366
anode/cathod reversible
Can someone explain how it was known to write the equations in this way when it was written as reversible?
Thanks
Thanks
- Sun Mar 01, 2020 5:05 pm
- Forum: Balancing Redox Reactions
- Topic: reversible reactions
- Replies: 2
- Views: 250
reversible reactions
When the reaction is reversible how do you know how to write which is the anode and which the cathode?
- Sun Mar 01, 2020 5:03 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Metal dissolution
- Replies: 10
- Views: 1030
Re: Metal dissolution
Is this material covered on test 2?
- Sun Mar 01, 2020 5:02 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: delta G = -nFE
- Replies: 6
- Views: 580
Re: delta G = -nFE
For these type of reactions what does it mean if the reaction is spontaneous?
- Sun Mar 01, 2020 5:01 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Units for delta G
- Replies: 31
- Views: 2002
Re: Units for delta G
What is the difference between delta g naught and delta g?
- Sun Mar 01, 2020 5:00 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Where to find Ecell values
- Replies: 15
- Views: 895
Re: Where to find Ecell values
Appendix 2B in textbook
- Sun Mar 01, 2020 4:59 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Electrochemical Series
- Replies: 6
- Views: 558
Re: Electrochemical Series
I don't think we really talked about it but it ranks chemical species according to their standard electrode potentials.
- Mon Feb 24, 2020 11:24 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Electromotive Force
- Replies: 3
- Views: 344
- Mon Feb 24, 2020 11:23 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Negative work
- Replies: 14
- Views: 953
Re: Negative work
When a system does work the value is negative
- Mon Feb 24, 2020 11:22 am
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Usage for Nernst equation
- Replies: 7
- Views: 657
Re: Usage for Nernst equation
What is the Nernst equation used for
- Mon Feb 24, 2020 11:22 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Free energy difference
- Replies: 2
- Views: 182
Re: Free energy difference
What does max cell potential mean?
- Mon Feb 24, 2020 11:21 am
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: gibbs free energy
- Replies: 15
- Views: 868
Re: gibbs free energy
"a thermodynamic quantity equal to the enthalpy (of a system or process) minus the product of the entropy and the absolute temperature."
- Wed Feb 12, 2020 2:29 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: q of ice and q of water
- Replies: 8
- Views: 1587
Re: q of ice and q of water
The heat lost by the water (indicated by the negative sign) is equal to the heat gained by the ice (the positive sign).
- Tue Feb 11, 2020 11:05 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: S = q/T
- Replies: 5
- Views: 343
Re: S = q/T
What is this equation used for?
- Tue Feb 11, 2020 11:03 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Entropy
- Replies: 4
- Views: 322
Re: Entropy
Increasing the Temp causes the kinetic energy of the particles to increase which makes them able to occupy more possible states at a faster rate therefore increasing entropy.
- Tue Feb 11, 2020 10:53 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Solids and Equilibrium Constant
- Replies: 2
- Views: 114
Re: Solids and Equilibrium Constant
because solids aren't included in the equilbrium equation so doesn't affect kC.
- Tue Feb 11, 2020 10:48 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Spontaneous
- Replies: 23
- Views: 1249
Re: Spontaneous
You can look at the sign of delta g. If it is negative its spontaneous if its positive its not.
- Tue Feb 11, 2020 10:42 pm
- Forum: Calculating Work of Expansion
- Topic: A system doing no work
- Replies: 4
- Views: 261
Re: A system doing no work
I might be wrong but I think work is only done when there is a volume change.
- Tue Feb 11, 2020 10:24 pm
- Forum: Calculating Work of Expansion
- Topic: w=-nRT(ln V2/V1) Derivation
- Replies: 3
- Views: 194
Re: w=-nRT(ln V2/V1) Derivation
You just know when to use it.
- Tue Feb 11, 2020 10:24 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: different formulas of w
- Replies: 3
- Views: 176
Re: different formulas of w
I think it depends on the information you're given in the problem and you rearrange accordingly.
- Tue Feb 04, 2020 9:19 am
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Extensive Property
- Replies: 4
- Views: 320
Re: Extensive Property
"Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present. "
- Tue Feb 04, 2020 9:18 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Differences between systems
- Replies: 3
- Views: 253
Re: Differences between systems
In closed system energy can be transferred and matter is constant but in isolated neither matter nor energy can be transferred. An example of a closed system is a sauce pan w/ lid. An example of an isolated is thermos.
- Tue Feb 04, 2020 9:14 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: isolated system
- Replies: 8
- Views: 505
Re: isolated system
In an isolated system no matter or energy is able to be transferred. I though a bomb calorimeter was a closed system not isolated?
- Tue Feb 04, 2020 9:11 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: open system
- Replies: 5
- Views: 447
- Tue Feb 04, 2020 9:09 am
- Forum: Administrative Questions and Class Announcements
- Topic: Video Outlines
- Replies: 3
- Views: 279
Re: Video Outlines
No I don't think so, at least not on the class website.
- Tue Feb 04, 2020 8:49 am
- Forum: Calculating Work of Expansion
- Topic: when to use...?
- Replies: 4
- Views: 189
Re: when to use...?
You use the ln one when the pressure is not constant.
- Tue Feb 04, 2020 8:48 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: reaction enthalpy
- Replies: 14
- Views: 522
Re: reaction enthalpy
In the thermodynamics outline what does the bullet point "calculate enthalpy changes from calorimetric data" mean?
- Tue Jan 28, 2020 10:34 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Types of Systems
- Replies: 3
- Views: 148
Re: Types of Systems
Bomb calorimeters are constructed so that there is a constant volume so no gases escape during the reaction. This makes it a closed system.
- Tue Jan 28, 2020 10:33 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Delta T
- Replies: 4
- Views: 195
Re: Delta T
005391550 wrote:an exothermic reaction will release heat which will raise the temperature of the surroundings and an endothermic reaction will therefore do the opposite
if heat is released for exothermic rxns why is delta t negative?
- Tue Jan 28, 2020 10:32 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: reaction enthalpy
- Replies: 14
- Views: 522
Re: reaction enthalpy
What is the difference between enthalpy and entropy?
- Tue Jan 28, 2020 10:28 pm
- Forum: Phase Changes & Related Calculations
- Topic: Calorimeter
- Replies: 5
- Views: 276
Re: Calorimeter
Calorimeters measure the heat involved in a chemical rxn or physical process. When a liquid loses or gains energy, its temperature changes. The calorimeter (or the simple one you use in the lab) measures the temperature change for the liquid and the mass to determine the amount of energy lost or gai...
- Tue Jan 28, 2020 10:24 pm
- Forum: Phase Changes & Related Calculations
- Topic: steam at 100ºC burn worse
- Replies: 7
- Views: 944
Re: steam at 100ºC burn worse
it has more energy bc it has the energy of boiling water and the energy needs to transition from vapor to liquid (as it touches you)
- Tue Jan 28, 2020 10:19 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Heat Supplied to a system
- Replies: 6
- Views: 472
Re: Heat Supplied to a system
Why do you include the mass of the copper, I thought you only used the mass of the water?
- Tue Jan 28, 2020 10:18 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Closed vs isolated systems
- Replies: 24
- Views: 908
Re: Closed vs isolated systems
With a closed system, the mater is constant but every is allowed to be transferred to the surroundings. In an isolated system neither matter nor energy transfer is allowed.
- Fri Jan 24, 2020 1:48 pm
- Forum: Phase Changes & Related Calculations
- Topic: Steam vs liquid
- Replies: 7
- Views: 364
Re: Steam vs liquid
Water has a very high vapor energy.
- Fri Jan 24, 2020 1:47 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Changes in Pressure
- Replies: 9
- Views: 413
Re: Changes in Pressure
It has to have an effect on volume to effect the direction but it doesn't effect equilibrium constant.
- Fri Jan 24, 2020 1:45 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: suggestions
- Replies: 16
- Views: 571
Re: suggestions
Chemistry Libretexts is really helpful.
- Fri Jan 24, 2020 1:43 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: equilibrium
- Replies: 3
- Views: 177
Re: equilibrium
Yes, every chemical reaction can theoretically be in equilibrium.
- Fri Jan 24, 2020 1:43 pm
- Forum: Phase Changes & Related Calculations
- Topic: Phase Transition Temp.
- Replies: 6
- Views: 349
Re: Phase Transition Temp.
it has to do with the energy stored in the bonds and the lack of temperature signifies and phase transition
- Fri Jan 24, 2020 1:42 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Delta H
- Replies: 10
- Views: 775
Re: Delta H
positive delta H means endothermic, negative delta H means exothermic.
- Fri Jan 24, 2020 1:41 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Prep for Test 1
- Replies: 16
- Views: 679
Re: Prep for Test 1
You don't need to memorize but should know the differences and converting.
- Fri Jan 17, 2020 4:08 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Temperature Change
- Replies: 9
- Views: 601
Re: Temperature Change
Its temperature dependent
- Fri Jan 17, 2020 4:07 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kc & Kp
- Replies: 12
- Views: 330
Re: Kc & Kp
Are the calculations the same regardless of whether its concentration of partial pressure?
- Fri Jan 17, 2020 4:05 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 5 percent rule
- Replies: 10
- Views: 538
Re: 5 percent rule
What approximation is it talking about?
- Fri Jan 17, 2020 4:01 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Endothermic and exothermic reactions
- Replies: 11
- Views: 1108
Re: Endothermic and exothermic reactions
This might help
- Fri Jan 17, 2020 3:59 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE tables
- Replies: 5
- Views: 209
ICE tables
How do we know when we need to use an ICE table vs when we can just use the equation of products over reactants?
- Wed Jan 08, 2020 3:10 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Partial Pressure vs. Concentration
- Replies: 4
- Views: 148
Re: Partial Pressure vs. Concentration
What are the units for kC and kP?
- Wed Jan 08, 2020 3:09 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Re: Q and Ke: Small K value and Large K value
- Replies: 7
- Views: 299
Re: Q and Ke: Small K value and Large K value
What exactly is the reaction quotient?
- Wed Jan 08, 2020 3:08 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: partial pressure
- Replies: 2
- Views: 138
partial pressure
When doing the equations for k why does Lavelle put a Pp in from of the reactants/products? I know it stands for partial pressure but what exactly is partial pressure?
- Wed Jan 08, 2020 3:06 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Small K value and Large K value
- Replies: 10
- Views: 742
Re: Small K value and Large K value
In lecture, Lavelle said that if the value is between the two limits neither the reactant nor the product is favored and it is in a sort of intermediate state.
- Wed Jan 08, 2020 3:05 pm
- Forum: Ideal Gases
- Topic: Q and K
- Replies: 7
- Views: 291
Re: Q and K
Although they are both calculated the same way, they are compared to determine which way the reaction will proceed.
- Sat Dec 07, 2019 8:15 pm
- Forum: Administrative Questions and Class Announcements
- Topic: MARSHMALLOW- FINAL REVIEW SESSION [ENDORSED]
- Replies: 115
- Views: 13123
Re: MARSHMALLOW- FINAL REVIEW SESSION [ENDORSED]
How do you do number 34?
- Sat Dec 07, 2019 4:16 pm
- Forum: Amphoteric Compounds
- Topic: Amphoteric vs amphiprotic
- Replies: 6
- Views: 34240
Re: Amphoteric vs amphiprotic
How do you know if something is amphiprotic?
- Sat Dec 07, 2019 11:52 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: chelating ligands [ENDORSED]
- Replies: 51
- Views: 98333
Re: chelating ligands [ENDORSED]
How do you know if there are sigma bonds available for rotation?
- Sat Dec 07, 2019 11:49 am
- Forum: Biological Examples
- Topic: Cisplatin
- Replies: 9
- Views: 828
Re: Cisplatin
005162520 wrote:Does chlorine get replaced by water or nitrogen from guanine base pair?
I think the water
- Sat Dec 07, 2019 11:49 am
- Forum: Biological Examples
- Topic: Cisplatin
- Replies: 9
- Views: 828
Re: Cisplatin
Camille 4I wrote:Why is cisplatin square planar and not tetrahedral?
its both
- Sat Dec 07, 2019 11:45 am
- Forum: Polyprotic Acids & Bases
- Topic: polyprotic acids
- Replies: 5
- Views: 406
polyprotic acids
Why is it that the Ka is bigger for the first dissociation in comparison to the second?
- Tue Dec 03, 2019 10:07 am
- Forum: Amphoteric Compounds
- Topic: Amphoteric/acidic/basic
- Replies: 5
- Views: 441
Amphoteric/acidic/basic
Based on problem 6A.17 from the homework, how do you determine if an oxide is acidic basic or amphoteric?
- Tue Dec 03, 2019 8:36 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination Number
- Replies: 9
- Views: 505
Re: Coordination Number
Coordination # and oxidation # aren't necessarily the same.
- Tue Dec 03, 2019 8:32 am
- Forum: Naming
- Topic: Naming Compounds with Two Ligands
- Replies: 3
- Views: 202
Re: Naming Compounds with Two Ligands
You order them alphabetically ignoring greek prefixes.
- Tue Dec 03, 2019 8:28 am
- Forum: Bronsted Acids & Bases
- Topic: Defining brosted and lewis
- Replies: 5
- Views: 450
Re: Defining brosted and lewis
I understand the definition of Bronsted and Lewis acids and bases but how do you identify if an acid or base is Lewis or Bronsted when it is in a reaction? Does this determine how you then deal with the reaction. In the reaction, the one giving off a proton is the acid and the one reacting with tha...
- Tue Dec 03, 2019 8:27 am
- Forum: General Science Questions
- Topic: 50 post grade
- Replies: 25
- Views: 1870
Re: 50 post grade
Do they check every Sunday or at the end?
- Tue Dec 03, 2019 8:26 am
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Strong Acids
- Replies: 4
- Views: 332
Re: Strong Acids
Ashley Osorio wrote:So because they (typically) completely dissolve in water, they have no Ka value. Can only strong acids do this then? Have no Ka value?
Do you mean as opposed to bases?
- Tue Dec 03, 2019 8:24 am
- Forum: Naming
- Topic: Memorizing
- Replies: 9
- Views: 602
Re: Memorizing
Yes we have to memorize the table he emailed to us.
- Tue Dec 03, 2019 8:23 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentate
- Replies: 3
- Views: 286
Re: Polydentate
You can look at lone pairs.
- Tue Dec 03, 2019 8:22 am
- Forum: Lewis Acids & Bases
- Topic: Memorizing Charges of Transition Metals
- Replies: 9
- Views: 836
Re: Memorizing Charges of Transition Metals
I think you have to memorize them.
- Tue Dec 03, 2019 8:20 am
- Forum: Conjugate Acids & Bases
- Topic: 6A.1
- Replies: 6
- Views: 799
Re: 6A.1
When doing acids you just add a proton and increase the charge respectively.
- Mon Nov 18, 2019 8:06 pm
- Forum: Coordinate Covalent Bonds
- Topic: coordinate covalent bond
- Replies: 9
- Views: 661
Re: coordinate covalent bond
Coordinate covalent bonds also often happen when there are exceptions to the octet rule like for boron.
- Mon Nov 18, 2019 8:05 pm
- Forum: Dipole Moments
- Topic: define
- Replies: 1
- Views: 173
define
What exactly is a dipole moment?
- Mon Nov 18, 2019 8:04 pm
- Forum: Ionic & Covalent Bonds
- Topic: Lone pairs
- Replies: 4
- Views: 352
Lone pairs
Why are lone pairs more likely to be found in certain places?
- Mon Nov 18, 2019 8:02 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2 Length
- Replies: 9
- Views: 477
Re: Test 2 Length
Why are lone pairs more likely to be found in certain places?
- Mon Nov 18, 2019 8:01 pm
- Forum: Lewis Structures
- Topic: double and triple bonds
- Replies: 6
- Views: 755
Re: double and triple bonds
The formal charges should be minimized but they also have to add up to the overall charge of the molecule.
- Mon Nov 18, 2019 8:00 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: dipole dipole
- Replies: 5
- Views: 318
Re: dipole dipole
You might look at the sizes and the electronegativity differences
- Mon Nov 18, 2019 7:59 pm
- Forum: Lewis Structures
- Topic: radicals
- Replies: 3
- Views: 318
Re: radicals
They have an odd number of electrons and are highly reactive
- Mon Nov 11, 2019 10:59 am
- Forum: General Science Questions
- Topic: Test 2
- Replies: 20
- Views: 847
Re: Test 2
Are all tests worth the same amount? (besides midterm of course)
- Mon Nov 11, 2019 10:58 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: hydrogen bonding in water
- Replies: 3
- Views: 185
Re: hydrogen bonding in water
It is meant to show the hydrogen bond between two water molecules.
- Mon Nov 11, 2019 10:57 am
- Forum: Resonance Structures
- Topic: how to draw
- Replies: 6
- Views: 454
Re: how to draw
My TA said if you do the shorthand (with the arrows) instead of actually drawing all the structures you should write an explanation to show that you know how many there are
- Mon Nov 11, 2019 10:56 am
- Forum: Lewis Structures
- Topic: Lewis Dot Structures
- Replies: 7
- Views: 404
Re: Lewis Dot Structures
At this point in what we have learned I don't think it matters too much.
- Mon Nov 11, 2019 10:55 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Hydrogen Bonding in Biology
- Replies: 2
- Views: 161
Re: Hydrogen Bonding in Biology
Also hydrogen bonds are one of the strongest types of bonds
- Wed Nov 06, 2019 5:28 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect vs. De Broglie
- Replies: 8
- Views: 771
Re: Photoelectric Effect vs. De Broglie
I thought that the units for joules had the second to the power of negative 2?
- Wed Nov 06, 2019 12:27 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Equations we need for midterm
- Replies: 7
- Views: 655
Re: Equations we need for midterm
is momentum mass times velocity?
- Sat Nov 02, 2019 6:08 pm
- Forum: Administrative Questions and Class Announcements
- Topic: DINO NUGGETS Review Session! Download Problems HERE [ENDORSED]
- Replies: 52
- Views: 6781
Re: DINO NUGGETS Review Session! Download Problems HERE [ENDORSED]
Can someone explain how to do #5 from this problem set?
- Sat Nov 02, 2019 5:15 pm
- Forum: Lewis Structures
- Topic: Double Bonds vs. Lone Pairs
- Replies: 2
- Views: 160
Re: Double Bonds vs. Lone Pairs
It depends on what the compound is and how you can minimize formal charge
- Sat Nov 02, 2019 5:11 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Copper and Chromium Exception
- Replies: 2
- Views: 267
Re: Copper and Chromium Exception
For these you just add one to the d orbital and take one from the 4s to make it 4s^1
- Sat Nov 02, 2019 5:09 pm
- Forum: Lewis Structures
- Topic: Resonance Hybrids
- Replies: 3
- Views: 175
Re: Resonance Hybrids
A resonance hybrid is used to show all of the resonance structures combined
- Sat Nov 02, 2019 5:06 pm
- Forum: Dipole Moments
- Topic: Definition
- Replies: 5
- Views: 259
Re: Definition
It happens when there is unequal charge density or separation of positive and negative charge. You can use it to measure polarity of a molecule
- Sat Nov 02, 2019 5:03 pm
- Forum: Properties of Electrons
- Topic: Resonance Structures
- Replies: 2
- Views: 243
Re: Resonance Structures
I'm pretty sure the formal charge doesn't change because you aren't changing connectivity just arrangement? Also you can use the dotted lines to draw resonance to show the change in bonds.
- Sat Nov 02, 2019 5:01 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Minimize formal charge of whole molecule?
- Replies: 7
- Views: 347
Re: Minimize formal charge of whole molecule?
You want to overall formal charge to equal zero when you take into consideration all formal charges of atoms in species