Search found 99 matches
- Wed Mar 11, 2020 5:59 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Catalysis
- Replies: 11
- Views: 846
Re: Catalysis
catalysis is basically the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst, it accelerates the reaction.
- Wed Mar 11, 2020 5:56 pm
- Forum: General Rate Laws
- Topic: Fast and Slow Step Reactions
- Replies: 5
- Views: 448
Re: Fast and Slow Step Reactions
the difference is that the slow step is considered the determining step, and that is what we use when we are trying to find the rate of a mechanism.
- Wed Mar 11, 2020 5:54 pm
- Forum: General Rate Laws
- Topic: intermediates
- Replies: 12
- Views: 744
Re: intermediates
correct because that would mean its formed and then used up.
- Wed Mar 11, 2020 5:53 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: dilutions and Ecell
- Replies: 16
- Views: 3357
Re: dilutions and Ecell
Well it really depends on where it is actually taking place but if it's in the side with a lower concentration would increase the concentration. In a cathode solution, it would decrease the cell potential.
- Wed Mar 11, 2020 5:48 pm
- Forum: Administrative Questions and Class Announcements
- Topic: final
- Replies: 14
- Views: 977
Re: final
He said he will let us know when that information is available! So until then, I would just anticipate that it will be the same date/time.
- Sun Mar 08, 2020 11:10 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: intermediate
- Replies: 26
- Views: 2062
Re: intermediate
Since it was formed by the actual reaction, it isn't part of the rate law.
- Sun Mar 08, 2020 11:08 pm
- Forum: General Rate Laws
- Topic: Changing the mass of electrodes
- Replies: 6
- Views: 397
Re: Changing the mass of electrodes
When halved, the concentration would not be changed so the Ecell wouldn't be changed.
- Sun Mar 08, 2020 11:02 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: A in the Arrhenius Equation
- Replies: 8
- Views: 551
Re: A in the Arrhenius Equation
A is essentially the frequency of collisions in the proper orientation and it is unique.
- Sun Mar 08, 2020 11:01 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: units
- Replies: 11
- Views: 769
Re: units
It would be moles per liter per time (in seconds)!
- Sun Mar 08, 2020 11:00 pm
- Forum: General Rate Laws
- Topic: slow step
- Replies: 9
- Views: 646
Re: slow step
The slow step would be the rate determining step, so that would be used in finding the rate-law.
- Sat Feb 29, 2020 5:21 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: spontaneity
- Replies: 39
- Views: 1934
Re: spontaneity
Gibbs free energy! If the delta g is negative then it is going to be spontaneous.
- Sat Feb 29, 2020 4:50 pm
- Forum: Balancing Redox Reactions
- Topic: Oxidizing/reducing agent
- Replies: 18
- Views: 1120
Re: Oxidizing/reducing agent
An oxidizing agent, or oxidant, gains electrons and is reduced in a chemical reaction and vice versa.
- Sat Feb 29, 2020 3:35 pm
- Forum: Balancing Redox Reactions
- Topic: Reducing/Oxidizing Agents
- Replies: 13
- Views: 638
Re: Reducing/Oxidizing Agents
It can be confusing at time but the best way to look at it would be associating it with the opposites of the term. So the element being oxidized is the reducing agent.
- Sat Feb 29, 2020 3:05 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Spontaneous reactions
- Replies: 6
- Views: 478
Re: Spontaneous reactions
When the cell is positive, the reaction is spontaneous, which also means there's a negative Gibbs free energy.
- Sun Feb 23, 2020 8:04 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 15
- Views: 931
Re: Test 2
From what I remember from 14A, it should be more like Test 1 in terms of difficulty.
- Sun Feb 23, 2020 7:58 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 15
- Views: 931
Re: Test 2
Normally his tests are a pickup on what is the half way before the next major test. The midterm and final are cumulative and will require you to know everything up until that test but the tests between (so test 1 and 2) will only cover a particular outline. So, test 2 covers everything taught AFTER ...
- Sun Feb 23, 2020 7:55 pm
- Forum: Balancing Redox Reactions
- Topic: What is Being Reduced?
- Replies: 10
- Views: 581
Re: What is Being Reduced?
You should try to be as specific as possible and show the redox half reactions to show and indicate you understand what is actually happening. I normally think of the reactions as OILRIG (oxidation is loss [of electrons]) (reduction is gain [of electrons]) so in this particular case, Fe is the one t...
- Sun Feb 23, 2020 7:49 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Extra Credit
- Replies: 17
- Views: 999
Re: Extra Credit
Lavelle doesn't offer extra credit opportunities.
- Sun Feb 23, 2020 7:48 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Le Chatelier’s Principle
- Replies: 11
- Views: 716
Re: Le Chatelier’s Principle
In relation to Le Chatelier's principle, I think it would just be how the reaction would react to a change in the shift in products and reactants based on concentrations.
- Sun Feb 23, 2020 7:12 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: salt bridge
- Replies: 10
- Views: 709
Re: salt bridge
A salt bridge is a device used in experiments that allows ion transfer between two half reactions in the galvanic cell, neutralizing them.
- Sun Feb 16, 2020 9:36 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Work
- Replies: 14
- Views: 1018
Re: Work
Positive would occur when the work is actually able to be done. When there is work being done on the system itself, the work would actually be negative.
- Sun Feb 16, 2020 9:29 pm
- Forum: General Science Questions
- Topic: Studying
- Replies: 67
- Views: 3883
Re: Studying
I think the best things you can do for 14b are office hours, review sessions, and practicing problems like the ones found in our assigned homework problems for the different outlines we cover.
- Sun Feb 16, 2020 9:19 pm
- Forum: Balancing Redox Reactions
- Topic: Redox Reactions
- Replies: 12
- Views: 577
Re: Redox Reactions
In an oxidation reaction, an electron is lost. In a reduction reaction, an electron is gained.
- Sun Feb 16, 2020 8:50 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Why are exothermic reactions generally spontaneous?
- Replies: 16
- Views: 1239
Re: Why are exothermic reactions generally spontaneous?
LBacker_2E wrote:Is this related to the relationship between ∆G and the direction of a spontaneous reaction? Does a spontaneous reaction have a -∆G and proceed in the forward direction?
Yes, when a reaction is spontaneous, it has a negative delta G
- Sun Feb 16, 2020 7:01 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Volume of the Universe
- Replies: 4
- Views: 276
Re: Volume of the Universe
Yes! That sounds right since the heat of the universe doesn't change.
- Sun Feb 09, 2020 3:13 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: solids and liquids in the rxn quotient
- Replies: 8
- Views: 531
Re: solids and liquids in the rxn quotient
Yes, exclude the two when calculating the Q or K.
- Sun Feb 09, 2020 3:11 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Cm
- Replies: 4
- Views: 183
Re: Cm
Cm would be the molar specific heat for the equation.
- Sun Feb 09, 2020 2:59 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: delta U
- Replies: 8
- Views: 250
Re: delta U
Within an adiabetic system, delta U would equal work because there is no heat transfer that can take place within the equation Delta U=q=w.
- Sun Feb 09, 2020 2:37 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: extensive property
- Replies: 12
- Views: 667
Re: extensive property
The concept of an extensive property would be things that alter depending on the amount of material.
- Sun Feb 09, 2020 2:35 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Topics on the Midterm
- Replies: 22
- Views: 1137
Re: Topics on the Midterm
All material from outlines 1-4!
- Sun Feb 02, 2020 7:30 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Moles
- Replies: 8
- Views: 557
Re: Moles
It's primarily focused on gas molecules and their coefficients.
- Sun Feb 02, 2020 7:28 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: K meaning
- Replies: 29
- Views: 2269
Re: K meaning
It's just the constant 1.380649x10^-23 J/K, hope that helped!
- Sun Feb 02, 2020 7:24 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: isolated system
- Replies: 13
- Views: 636
Re: isolated system
A pretty common example you can probably relate to would be a really good thermos or even a hydroflask!
- Sun Feb 02, 2020 7:22 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Definition of First Law
- Replies: 9
- Views: 363
Re: Definition of First Law
The first law of Thermodynamics states that heat is energy and in relation, cannot be created or destroyed.
- Sun Feb 02, 2020 7:20 pm
- Forum: Calculating Work of Expansion
- Topic: Work
- Replies: 4
- Views: 191
Re: Work
Work can be defined as the product of the force used to move an object times the distance the object is moved.
- Sun Jan 26, 2020 11:42 pm
- Forum: Student Social/Study Group
- Topic: Office Hours
- Replies: 5
- Views: 363
Re: Office Hours
It depends on the UA normally, some provide worksheets while others don't!
- Sun Jan 26, 2020 11:40 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: checking approximation
- Replies: 4
- Views: 129
Re: checking approximation
Yes, if the answer comes back more than 5% you should go back and use the quadratic formula.
- Sun Jan 26, 2020 11:37 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat Capacity of Water
- Replies: 6
- Views: 898
Re: Heat Capacity of Water
It would be proportional so the change would essentially be the same.
- Sun Jan 26, 2020 11:29 pm
- Forum: Phase Changes & Related Calculations
- Topic: State functions
- Replies: 3
- Views: 106
Re: State functions
A state function does not depend on the path taken to reach that specific value, so heat would not be considered a state function.
- Sun Jan 26, 2020 11:01 pm
- Forum: Phase Changes & Related Calculations
- Topic: Phase changes
- Replies: 8
- Views: 234
Re: Phase changes
The phase would require a certain amount of energy to change. Within enthalpy, the phase change needs to be combined with the bond enthalpy.
- Sun Jan 19, 2020 10:59 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Adding a molecule thats not in reaction
- Replies: 2
- Views: 100
Re: Adding a molecule thats not in reaction
It actually wouldn't affect the equilibrium because it does not affect the concentrations.
- Sun Jan 19, 2020 10:55 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: H20 in the ICE table
- Replies: 26
- Views: 1510
Re: H20 in the ICE table
Yep! Leave out H2O, solids, and other liquids.
- Sun Jan 19, 2020 10:40 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Effect of increasing pressure on reactions
- Replies: 6
- Views: 273
Re: Effect of increasing pressure on reactions
The reaction would end up shifting towards the side in which there are fewer mole because that would effect the equilibrium!
- Sun Jan 19, 2020 10:34 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: pKa
- Replies: 13
- Views: 509
Re: pKa
The lower the pKa, the stronger the acid
- Sun Jan 19, 2020 10:30 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: ICE Tables
- Replies: 13
- Views: 519
Re: ICE Tables
H2O would have the concentration of 1 as well as it is normally in excess.
- Sun Jan 12, 2020 11:53 pm
- Forum: Ideal Gases
- Topic: Q vs. K
- Replies: 10
- Views: 344
Re: Q vs. K
Q is the constant through the entire equilibrium while K is the constant at equilibrium!
- Sun Jan 12, 2020 11:30 pm
- Forum: Ideal Gases
- Topic: K and Units
- Replies: 7
- Views: 348
Re: K and Units
You shouldn't use units when calculating K as a constant but for molarity, you should use moles per liter (moles/L).
- Sun Jan 12, 2020 11:20 pm
- Forum: Ideal Gases
- Topic: Kc and Kp
- Replies: 8
- Views: 310
Re: Kc and Kp
Kc is often the equilibrium constant found in concentrations while Kp deals with the partial pressures.
- Sun Jan 12, 2020 11:18 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: K
- Replies: 10
- Views: 407
Re: K
Kp is used within partial pressures while Kc is the constant within concentrations.
- Sun Jan 12, 2020 11:09 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Hw for next week
- Replies: 19
- Views: 812
Re: Hw for next week
I think as long we continue to cover equilibrium during lecture this week it should be fine, but I also believe you should contact your TA!
- Sun Dec 08, 2019 11:42 pm
- Forum: General Science Questions
- Topic: Coordination Compounds
- Replies: 7
- Views: 613
Re: Coordination Compounds
Yes! It assists with naming while showing the the biological significance, like cisplatin.
- Sun Dec 08, 2019 11:40 pm
- Forum: Lewis Structures
- Topic: Cl as a central atom
- Replies: 5
- Views: 716
Re: Cl as a central atom
I think chlorine can be an exception to the octet rule as long as the charge is 0
- Sun Dec 08, 2019 11:38 pm
- Forum: Sigma & Pi Bonds
- Topic: Sigma Vs Pi
- Replies: 12
- Views: 813
Re: Sigma Vs Pi
I think the main thing you need to recognize is when they occur so sigma would be a single bond, a double would be both a sigma and pi bond, and a triple bond would be two pi bonds and one sigma bond.
- Sun Dec 08, 2019 11:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final tips
- Replies: 19
- Views: 1078
Re: Final tips
I know it's fairly late for this advice now but I think that one of the best ways to study would have been by doing as many homework problems as possible from the many sections, reading the text book, and looking over the past tests that we have been given!
- Sun Dec 08, 2019 11:31 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: bent v. angular
- Replies: 27
- Views: 1522
Re: bent v. angular
Bent and angular are the same thing!
- Sun Dec 01, 2019 8:53 pm
- Forum: Hybridization
- Topic: Hybridization
- Replies: 7
- Views: 368
Re: Hybridization
That's just about it! The homework problems really help with practicing those skills.
- Sun Dec 01, 2019 8:52 pm
- Forum: Hybridization
- Topic: Hybridization (Lone Pairs)
- Replies: 4
- Views: 186
Re: Hybridization (Lone Pairs)
Yes! The lone pairs are still considered sites for bonding to occur
- Sun Dec 01, 2019 8:50 pm
- Forum: Conjugate Acids & Bases
- Topic: Water as an Acid/Base
- Replies: 20
- Views: 1568
Re: Water as an Acid/Base
It can actually act as both, it really depends on the situation.
- Sun Dec 01, 2019 8:46 pm
- Forum: Naming
- Topic: Final Exam?
- Replies: 20
- Views: 1155
Re: Final Exam?
Definitely cumulative! Best way to study in my opinion is to go over the assigned problems and previous test questions!
- Sun Dec 01, 2019 8:44 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: pH scale
- Replies: 12
- Views: 666
Re: pH scale
The 0-14 primarily acts as a scale for most solutions.
- Sun Nov 24, 2019 7:47 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligands
- Replies: 5
- Views: 379
Re: Ligands
Ligands are ions that bond with central metal atoms.
- Sun Nov 24, 2019 7:27 pm
- Forum: Sigma & Pi Bonds
- Topic: Sigma and Pi Bonds
- Replies: 7
- Views: 444
Re: Sigma and Pi Bonds
Sigma is a single bond (primarily the 'inital' bond) while a double bond would be the 'next' bond, being one sigma and one pi bond.
- Sun Nov 24, 2019 7:12 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bent vs linear
- Replies: 56
- Views: 4285
Re: Bent vs linear
linear wouldn't contain a lone pair while bent would.
- Sun Nov 24, 2019 7:06 pm
- Forum: Hybridization
- Topic: Sigma and Pi bonds
- Replies: 13
- Views: 716
Re: Sigma and Pi bonds
you need to make sure that you just label the bond sigma or pi.
- Sun Nov 24, 2019 6:56 pm
- Forum: Hybridization
- Topic: d-orbitals
- Replies: 7
- Views: 666
Re: d-orbitals
Yes they do! They get involved during the hybridization of period 3!
- Sun Nov 17, 2019 11:48 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Van Der Waals Interaction
- Replies: 11
- Views: 636
Re: Van Der Waals Interaction
Yes, every molecule experiences these forces, the strongest to weakest would be as follows: ion-dipole, hydrogen bonds, dipole-dipole, and lastly, Van Der Waals.
- Sun Nov 17, 2019 11:39 am
- Forum: Ionic & Covalent Bonds
- Topic: Bonds strength
- Replies: 4
- Views: 169
Re: Bonds strength
Since there is still repulsion present between the bonds, the double bond isn't double.
- Sun Nov 17, 2019 11:37 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR Model
- Replies: 5
- Views: 166
Re: VSEPR Model
the electron arrangement is primarily the placement, the molecular shape would be a 3D representation of where the electron density is actually placed in relation to the electron-electron repulsion.
- Sun Nov 17, 2019 11:29 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: seesaw
- Replies: 9
- Views: 670
Re: seesaw
There wound be four bonding pairs and one lone pair!
- Sun Nov 17, 2019 11:16 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Hydrogen Bonding
- Replies: 6
- Views: 416
Re: Hydrogen Bonding
Yes, it's a type of dipole-dipole but stronger than the normal dipole-dipole.
- Sun Nov 10, 2019 10:28 pm
- Forum: Octet Exceptions
- Topic: electron number in octet
- Replies: 8
- Views: 616
Re: electron number in octet
for the most part, it depends on what type of element it is!
- Sun Nov 10, 2019 10:22 pm
- Forum: Dipole Moments
- Topic: Dipole
- Replies: 1
- Views: 124
Re: Dipole
I believe we'd need to know what they are and under what circumstances they occur since we will probably have to identify IM forces in assigned problems, hope that helped!
- Sun Nov 10, 2019 10:16 pm
- Forum: General Science Questions
- Topic: Test 2
- Replies: 20
- Views: 847
Re: Test 2
I'd imagine that it only cover topics after the midterm! :)
- Sun Nov 10, 2019 10:15 pm
- Forum: Trends in The Periodic Table
- Topic: Atomic Radius
- Replies: 30
- Views: 3129
Re: Atomic Radius
The trend would demonstrate that from right to left and top to bottom, the atomic radius would increase.
- Sun Nov 10, 2019 10:12 pm
- Forum: Lewis Structures
- Topic: Midterm grades
- Replies: 26
- Views: 1447
Re: Midterm grades
Most likely, it'll be this week since there are so many of us!
- Sun Nov 03, 2019 7:17 pm
- Forum: Lewis Acids & Bases
- Topic: diff b/w lewis acid and base
- Replies: 12
- Views: 713
Re: diff b/w lewis acid and base
Acids accept while the bases donate electron pairs!
- Sun Nov 03, 2019 7:15 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: 1B.26
- Replies: 4
- Views: 184
Re: 1B.26
it would be between -5 m/s to 5 m/s, so it'd be about 10m/s.
- Sun Nov 03, 2019 10:57 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: isoelectronic definition
- Replies: 7
- Views: 273
Re: isoelectronic definition
A good place to read about it is 1F.3 but it essentially means when atoms have the same amount of electrons! Hope that helped!
- Sun Nov 03, 2019 10:47 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Cu and Cr
- Replies: 11
- Views: 582
Re: Cu and Cr
Yes, the trend would continue!
- Sun Nov 03, 2019 9:42 am
- Forum: SI Units, Unit Conversions
- Topic: midterm 1
- Replies: 5
- Views: 437
Re: midterm 1
It'll include everything from outlines 1 and 2, while including most of 3
- Sun Oct 27, 2019 11:12 pm
- Forum: Ionic & Covalent Bonds
- Topic: Covalent Bonds
- Replies: 14
- Views: 1088
Re: Covalent Bonds
covalent bonds are only formed between two non-metals!
- Sun Oct 27, 2019 10:45 pm
- Forum: *Shrodinger Equation
- Topic: Review
- Replies: 4
- Views: 437
Re: Review
I haven't been to every single one but I believe most of the sessions is the UA/TA going over the basics and then progressing into what we're covering in the actual class. I have heard that of some of the other students on occasion have been given worksheets.
- Sun Oct 27, 2019 10:20 pm
- Forum: Lewis Structures
- Topic: Choosing the central atom
- Replies: 16
- Views: 794
Re: Choosing the central atom
When picking a central atom, it's most common to pick the one with the lowest ionization energy.
- Sun Oct 27, 2019 10:13 pm
- Forum: Ionic & Covalent Bonds
- Topic: electron configuration order
- Replies: 6
- Views: 416
- Sun Oct 27, 2019 10:05 pm
- Forum: Ionic & Covalent Bonds
- Topic: Valence Electrons
- Replies: 16
- Views: 771
Re: Valence Electrons
For the blocks, the amount of valence electrons is based off of the group, or much rather the last shell's electron amount.
- Sun Oct 20, 2019 2:58 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Homework for week 4
- Replies: 3
- Views: 188
Re: Homework for week 4
You can either do Chemical Bonding or Quantum problems for week 4!
- Sun Oct 20, 2019 2:57 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3621795
Re: Post All Chemistry Jokes Here
What happens when electrons lose their energy?
A: They get Bohr'ed
A: They get Bohr'ed
- Sun Oct 20, 2019 2:54 pm
- Forum: Properties of Light
- Topic: Modules
- Replies: 5
- Views: 284
Re: Modules
Honestly, I'm not sure because I think everything he's posted has been uploaded at once. Hopefully he will be posting some more modules.
- Sun Oct 20, 2019 2:45 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: how to prepare
- Replies: 22
- Views: 905
Re: how to prepare
Personally, I go to the tutoring sessions and the step up sessions up in Covel! They really do help since they hit just about everything we cover in lecture, just in a slower and more explained way. Another thing I would recommend is getting some extra help from your TA at office hours. Good luck!
- Sun Oct 20, 2019 2:36 pm
- Forum: Properties of Light
- Topic: Unit for Wavelength
- Replies: 34
- Views: 2487
Re: Unit for Wavelength
The wavelength measures the distance between each wave! So the unit for wavelength would be in meters (m) but we also frequently use nanometers (nm). The conversion would be 1nm= 10^-9 m!
- Sun Oct 13, 2019 2:32 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: First Test Result
- Replies: 5
- Views: 303
Re: First Test Result
it'll probably be in discussion this week!
- Sun Oct 13, 2019 2:28 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Dilutions
- Replies: 10
- Views: 1089
Re: Dilutions
I would use M (initial) X Volume (initial) = M (final) X Volume (final)
- Sun Oct 13, 2019 2:05 pm
- Forum: Properties of Light
- Topic: e=hv
- Replies: 7
- Views: 488
Re: e=hv
e=hv references the energy per photon and it was derived from the photoelectric effect.
- Sun Oct 13, 2019 2:00 pm
- Forum: Properties of Light
- Topic: EM waves
- Replies: 3
- Views: 153
Re: EM waves
It's the disturbance.
- Sun Oct 06, 2019 9:54 pm
- Forum: Empirical & Molecular Formulas
- Topic: empirical and molecular formulas
- Replies: 7
- Views: 507
Re: empirical and molecular formulas
Yes, it can! Since molecular formula tells you the amount of molecules in a compound and the empirical formula tells you the simplest ratio in a compound, if a compound's molecular formula cannot be reduced anymore, the empirical formula would be able to be the same as the molecular.
- Sun Oct 06, 2019 9:32 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Specific type of calculator for tests?
- Replies: 6
- Views: 359
Re: Specific type of calculator for tests?
A scientific calculator should work well!
- Sun Oct 06, 2019 9:30 pm
- Forum: Limiting Reactant Calculations
- Topic: limiting reactant
- Replies: 9
- Views: 582
Re: limiting reactant
Not necessarily, but the reactant with the smallest number of moles can be the limiting reactant if all reactants within the chemical equation react in a mole ratio of one to one.
- Sun Oct 06, 2019 7:56 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Theoretical vs. Actual Yield
- Replies: 38
- Views: 14073
Re: Theoretical vs. Actual Yield
Well, actual yield is the mass of the product that was actually obtained while theoretical is just going to be what is expected, without any complications or opportunities for the mass of the product to decrease. So normally, the actual yield will always be less than the calculated theoretical due t...
- Sun Oct 06, 2019 11:23 am
- Forum: Empirical & Molecular Formulas
- Topic: Polyatomic Ions/Naming Compounds
- Replies: 6
- Views: 648
Re: Polyatomic Ions/Naming Compounds
The way I had memorized them in high school was organizing them by the suffixes of the compounds like -ite, -ate, and -ide! (i.e. AgNO3 - Silver nitrate) Hope this helped!