Search found 100 matches
- Fri Mar 12, 2021 11:55 pm
- Forum: General Rate Laws
- Topic: Order of a reaction
- Replies: 10
- Views: 609
Re: Order of a reaction
They will likely give a chart with experimental data which you can use to determine the order.
- Fri Mar 12, 2021 11:49 pm
- Forum: Student Social/Study Group
- Topic: Test curve?
- Replies: 40
- Views: 2805
Re: Test curve?
If I remember correctly, Dr. Lavelle gave a few free points after the 14a final. I could be wrong since it's been a few months.
- Fri Mar 12, 2021 11:46 pm
- Forum: Balancing Redox Reactions
- Topic: Studying for finals?
- Replies: 47
- Views: 1993
Re: Studying for finals?
Before the final do some meditation or some other way to calm yourself cause it'll definitely help!
- Fri Mar 12, 2021 11:44 pm
- Forum: Student Social/Study Group
- Topic: Planning on dorming in the Fall?
- Replies: 61
- Views: 3122
Re: Planning on dorming in the Fall?
For me, it depends on how many other campus activities and services are opened up. If it is still very limited then I would probably want to move to an apartment where rent is cheaper than dorm fees.
- Fri Mar 12, 2021 11:41 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Anode and Cathode
- Replies: 25
- Views: 1208
Re: Anode and Cathode
Yep, keep the anode on the left and remember that the oxidation is occurring there. The right is for the cathode where reduction happens.
- Sun Mar 07, 2021 11:57 pm
- Forum: Student Social/Study Group
- Topic: Book Recommendations
- Replies: 135
- Views: 11941
Re: Book Recommendations
I picked up a new book recently called "Anxious People." I haven't finished it yet but the style so far is pretty interesting and it was a bestseller so I think it's worth a read.
- Sun Mar 07, 2021 11:54 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: E° vs. E and G° vs. G
- Replies: 25
- Views: 970
Re: E° vs. E and G° vs. G
Yep! Adding naught signifies that you are talking about standard temperature and pressure.
- Sun Mar 07, 2021 11:53 pm
- Forum: Student Social/Study Group
- Topic: How do you deal with burnout?
- Replies: 144
- Views: 13077
Re: How do you deal with burnout?
I've been experiencing a lot of burnout as well, so I appreciate the advice!
- Sun Mar 07, 2021 11:52 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Cut off for K to ignore x
- Replies: 7
- Views: 392
Re: Cut off for K to ignore x
If the percent dissociation is less than 5% you can ignore it. You should always double-check.
- Sun Mar 07, 2021 11:51 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: E vs E naught
- Replies: 36
- Views: 1538
Re: E vs E naught
E naught refers to E under standard conditions of temperature and pressure.
- Mon Mar 01, 2021 11:09 pm
- Forum: Ideal Gases
- Topic: Chem BL
- Replies: 107
- Views: 7121
Re: Chem BL
I'm taking BL next quarter along with starting the ls7 series. Not too sure about the difficulty of 14c but I don't think I want to overlap them.
- Mon Mar 01, 2021 11:06 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Grades
- Replies: 7
- Views: 421
Re: Grades
The grading in this class is pretty standard and you only need a 50% to pass. You can check the syllabus for a more detailed breakdown of the points.
- Mon Mar 01, 2021 11:04 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Kinetic control
- Replies: 14
- Views: 853
Re: Kinetic control
The rate of formation is a kinetic factor that controls the potential outcome.
- Mon Mar 01, 2021 11:02 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Anode/Cathode
- Replies: 45
- Views: 1425
Re: Anode/Cathode
Always put the anode on the left and the cathode on the right.
- Mon Mar 01, 2021 11:01 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Moles in ΔG = -nFE
- Replies: 45
- Views: 3647
Re: Moles in ΔG = -nFE
n in this equation refers to the moles of electrons so just check the balanced equation.
- Sun Feb 21, 2021 11:27 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Delta G and G naught
- Replies: 46
- Views: 4356
Re: Delta G and G naught
Naught is telling you that the system is at standard conditions of temperature and pressure.
- Sun Feb 21, 2021 11:19 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Open vs closed
- Replies: 31
- Views: 2756
Re: Open vs closed
Open systems allow for transfers in matter and energy, closed allow for transfers in only energy, and isolated doesn't allow transfers in either.
- Sun Feb 21, 2021 11:17 pm
- Forum: General Science Questions
- Topic: Tips
- Replies: 53
- Views: 2191
Re: Tips
Doing as many of the problems from the textbook so that you can be ready for any combination of given information and information you need to solve for.
- Sun Feb 21, 2021 11:16 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Mass vs Entropy
- Replies: 8
- Views: 2191
Re: Mass vs Entropy
Larger molecules have more overall configurations which allow for a higher entropy.
- Sun Feb 21, 2021 11:14 pm
- Forum: Calculating Work of Expansion
- Topic: Work and Delta V
- Replies: 20
- Views: 2420
Re: Work and Delta V
Work is definitely dependent on delta V as the equation is: w=P*deltaV
- Mon Feb 15, 2021 9:56 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Isothermal Reactions
- Replies: 26
- Views: 1168
Re: Isothermal Reactions
Because the temperature is constant, the reaction will be reversible.
- Mon Feb 15, 2021 9:54 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: confusion on using Cp and Cv
- Replies: 24
- Views: 1018
Re: confusion on using Cp and Cv
Cp is used with constant pressure and Cv is used with constant volume.
- Mon Feb 15, 2021 9:52 pm
- Forum: Calculating Work of Expansion
- Topic: Sign of work
- Replies: 25
- Views: 857
Re: Sign of work
Work being done to a system is positive as energy is being put in, while the system doing work on its surroundings is negative as energy is leaving.
- Mon Feb 15, 2021 9:51 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: m versus n
- Replies: 11
- Views: 574
Re: m versus n
Yes, they always use n for moles so as not to confuse it with m which is for mass.
- Mon Feb 15, 2021 9:49 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: R Constant
- Replies: 91
- Views: 5211
Re: R Constant
Try to match the units for pressure, atm or torr, with the ones given in the question.
- Mon Feb 08, 2021 12:32 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: delta U= delta H
- Replies: 21
- Views: 1483
Re: delta U= delta H
As long as Pressure and Volume are constant, they are equal because no work is being done.
- Mon Feb 08, 2021 12:29 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Cv and cp
- Replies: 7
- Views: 188
Re: Cv and cp
Cp is specific heat for constant pressure while Cv is for constant volume. Cv + R = Cp
- Mon Feb 08, 2021 12:27 am
- Forum: Administrative Questions and Class Announcements
- Topic: midterm 2
- Replies: 12
- Views: 608
Re: midterm 2
Going off of 14A, I think its safe to say that it will be just the material after MT1.
- Mon Feb 08, 2021 12:26 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Combustion = Exothermic
- Replies: 23
- Views: 791
Re: Combustion = Exothermic
The bonds being formed release more heat than the bonds broken, but more generally think of a fire. As a fire burns heat is released into the surroundings and is obviously exothermic. Heat isn't a reactant, it is a product.
- Mon Feb 08, 2021 12:23 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: R Constant
- Replies: 91
- Views: 5211
Re: R Constant
Always check the pressure units and use the corresponding R value.
- Tue Feb 02, 2021 6:55 pm
- Forum: Phase Changes & Related Calculations
- Topic: Define Phase Change
- Replies: 78
- Views: 4902
Re: Define Phase Change
Remember the 3 phases are: gas, liquid, solid.
When a substance in any one phase changes to any other phase a phase change occurs.
When a substance in any one phase changes to any other phase a phase change occurs.
- Tue Feb 02, 2021 6:53 pm
- Forum: Phase Changes & Related Calculations
- Topic: Endothermic vs exothermic
- Replies: 24
- Views: 1640
Re: Endothermic vs exothermic
Condensation is a phase change from gas to liquid. Water requires heat input to vaporize so the reverse would release heat. Therefore condensation is exothermic.
- Tue Feb 02, 2021 6:52 pm
- Forum: Calculating Work of Expansion
- Topic: Work on surrounding
- Replies: 12
- Views: 410
Re: Work on surrounding
The system you were confused about has one mole of solid and one of gas on one side and two mols of gas on the other. The overall amount of gas is increasing in the system and thus does work on the surroundings.
- Tue Feb 02, 2021 6:49 pm
- Forum: Phase Changes & Related Calculations
- Topic: Why does steam cause severe burns?
- Replies: 22
- Views: 1626
Re: Why does steam cause severe burns?
If you recall the graph showing phase changes of water, there is a very long period where the water is absorbing heat without rising in temperature before it vaporizes. When steam comes into contact with skin, all that heat will be absorbed by the skin before that water can begin to lower in temp.
- Tue Feb 02, 2021 6:47 pm
- Forum: Phase Changes & Related Calculations
- Topic: when to assume x is insignificant
- Replies: 86
- Views: 6386
Re: when to assume x is insignificant
The general rule is 10^-4 or smaller is fair game. But sometimes you need to make sure that the percent produced is less than 5%.
- Sun Jan 24, 2021 11:39 pm
- Forum: Ideal Gases
- Topic: Gas Constant Value
- Replies: 43
- Views: 1420
Re: Gas Constant Value
Just check the units and use the corresponding value on the equation sheet!
- Sun Jan 24, 2021 11:36 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: closed system
- Replies: 43
- Views: 1466
Re: closed system
Closed systems have a fixed amount of matter and allow the transfer of energy as heat. Volume can actually be changed in such a system but it would most likely be as a result of a change by the experimenter such as moving a piston up or down to change volume and pressure.
- Sun Jan 24, 2021 11:30 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Percent Ionization
- Replies: 7
- Views: 333
Re: Percent Ionization
Use an ICE chart to set up your problem and solve for the concentration of H+ which would be x. Divide the value of x by the original concentration of lactic acid to determine how much of the acid ended up ionizing.
- Sun Jan 24, 2021 11:27 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Clarification for Sampling #7
- Replies: 10
- Views: 524
Re: Clarification for Sampling #7
Remember that you can use the Kw=1.0x10^-14 to switch between Ka and Kb as Ka*Kb=Kw
- Sun Jan 24, 2021 11:25 pm
- Forum: Phase Changes & Related Calculations
- Topic: when to assume x is insignificant
- Replies: 86
- Views: 6386
Re: when to assume x is insignificant
In some of the sapling problems, the difference between the Ka and concentration needs to be more than 1000 which is 10^3 but in some cases it is better to use 10^-4.
- Sun Jan 17, 2021 11:23 pm
- Forum: Student Social/Study Group
- Topic: Advice for study
- Replies: 31
- Views: 1199
Re: Advice for study
Practicing with the textbook problems and going to the zoom resources are good places to start.
- Sun Jan 17, 2021 11:19 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Q > K, Q< K
- Replies: 25
- Views: 762
Re: Q > K, Q< K
Q>K means the reaction will move towards the products. Q<K means the reaction will shift toward the products.
- Sun Jan 17, 2021 11:16 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: q vs k
- Replies: 62
- Views: 2368
Re: q vs k
Q moves towards K and when they equal the same thing, the reaction is at equilibrium.
- Sun Jan 17, 2021 11:15 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Units to know
- Replies: 11
- Views: 497
Re: Units to know
Atm and Torr are both units for pressure that you should know.
- Sun Jan 17, 2021 11:13 pm
- Forum: Ideal Gases
- Topic: R Value
- Replies: 17
- Views: 649
Re: R Value
8.206 x 10^-2 is pretty standard for the R but it should always be given.
- Sun Jan 10, 2021 7:54 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Q and K
- Replies: 8
- Views: 361
Re: Q and K
Q is used at any point in time and is not always at equilibrium. K is strictly for when the reaction is at equilibrium. By comparing Q and K (Q>K or Q<K) you can tell where the reaction is at any point in time and which direction it will move towards in order to reach equilibrium.
- Sun Jan 10, 2021 7:51 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: change in K
- Replies: 22
- Views: 805
Re: change in K
K is unaffected by any change except for changes in Temp.
- Sun Jan 10, 2021 7:49 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Homogeneous and Heterogeneous Equilibrium
- Replies: 13
- Views: 695
Re: Homogeneous and Heterogeneous Equilibrium
To determine if the reaction is homogenous or heterogenous, you should look at all of the compounds present in the reaction including those that won't be included in the calculations for K or Q.
- Sun Jan 10, 2021 7:44 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Clarification of terminology
- Replies: 15
- Views: 589
Re: Clarification of terminology
Yes, all three express the same idea.
Its more preferable to say that equilibrium "lies" or "sits" on a side instead of "shifts" because equilibrium won't actually move and its position is entirely based on comparison to other Equilibrium constants.
Its more preferable to say that equilibrium "lies" or "sits" on a side instead of "shifts" because equilibrium won't actually move and its position is entirely based on comparison to other Equilibrium constants.
- Sun Jan 10, 2021 7:39 pm
- Forum: Ideal Gases
- Topic: PV=nRT
- Replies: 74
- Views: 4207
Re: PV=nRT
Pressure * Volume=n(Moles) * R(Gas Constant 8.314 J/mol·K) * Temperature(Kelvin)
- Sun Dec 13, 2020 2:34 am
- Forum: Identifying Acidic & Basic Salts
- Topic: Neutral Salts
- Replies: 7
- Views: 439
Re: Neutral Salts
As long as the anion is from a strong acid, and the cation is from a strong base, the salt will be neutral.
- Sun Dec 13, 2020 2:25 am
- Forum: Naming
- Topic: Cobalt vs Cobaltate
- Replies: 16
- Views: 1059
Re: Cobalt vs Cobaltate
The negative charge at the end of the compound is referenced by adding the -ate suffix at the end of the transition metal.
- Sun Dec 13, 2020 2:22 am
- Forum: Air Pollution & Acid Rain
- Topic: Why does acid rain exist
- Replies: 16
- Views: 1044
Re: Why does acid rain exist
C02, which is always present in air and continuously being committed by countless sources, is an acid that can lower the pH of rain and cause acid rain. Other molecules that find their way into the atmosphere, like SO2 from the combustion of coal, has the same effect to even greater extents.
- Sun Dec 13, 2020 2:19 am
- Forum: Bronsted Acids & Bases
- Topic: Strong bases oxides vs hydroxides
- Replies: 4
- Views: 567
Re: Strong bases oxides vs hydroxides
I believe that metal hydroxides are the stronger of the two simply because they are listed in any list of strong bases while metal oxides are never present. The textbook list says to assume that the base is weak if it isn't included on the list so I wouldn't stray from that rule.
- Sun Dec 13, 2020 2:10 am
- Forum: Amphoteric Compounds
- Topic: Recognizing Amphoteric Substances
- Replies: 8
- Views: 505
Re: Recognizing Amphoteric Substances
Amphoteric substances need to be able to accept and donate protons. A negative charge is a good indicator that a Hydrogen can be accepted, but if the molecule already has a hydrogen then the molecule can also donate a proton. This isn't a rule for all amphoteric substances but it can be helpful.
- Sun Dec 06, 2020 10:30 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Differences in Rotation between σ-Bonds and π-Bonds
- Replies: 5
- Views: 1962
Re: Differences in Rotation between σ-Bonds and π-Bonds
From what I've read, you are right in thinking that rotation would cause the pi bonds to break. This is because the pi bonds depend on the parallel orientation of the p orbitals and any rotation would result in the orbitals no longer being parallel.
- Sun Dec 06, 2020 10:24 pm
- Forum: Significant Figures
- Topic: When should I start looking at sig figs?
- Replies: 31
- Views: 1382
Re: When should I start looking at sig figs?
Graphing calculators are my saving grace here, I just save all rounding until the very end.
- Sun Dec 06, 2020 10:13 pm
- Forum: Student Social/Study Group
- Topic: Evaluations
- Replies: 17
- Views: 794
Re: Evaluations
I've seen a lot of wishful thinking about extra credit for this class but haven't heard about any in previous quarters so I kinda doubt there will be any.
- Sun Dec 06, 2020 10:10 pm
- Forum: Administrative Questions and Class Announcements
- Topic: CCLE Lectures
- Replies: 9
- Views: 564
Re: CCLE Lectures
I was trying a few hours ago and the video playback on ccle froze midway through a lecture on my laptop. I switched to a desktop and I almost finished the lecture but it froze and stopped working right at the end. Now I can't access lectures on either. Kinda frustrating that it's been like this for ...
- Sun Dec 06, 2020 10:05 pm
- Forum: Lewis Acids & Bases
- Topic: lewis vs bronsted
- Replies: 10
- Views: 410
Re: lewis vs bronsted
Lewis acids and bases focus on the movement of electrons, while bronsted looks at the movement of protons.
- Sun Nov 29, 2020 10:49 pm
- Forum: Ionic & Covalent Bonds
- Topic: Lewis structure
- Replies: 13
- Views: 629
Re: Lewis structure
Always keep a periodic table handy. The distance between atoms on the table is the best way to determine differences in electronegativity which helps determine the bond type.
- Sun Nov 29, 2020 10:47 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: sapling 17 & 18
- Replies: 6
- Views: 372
Re: sapling 17 & 18
For organic molecules like in #18, the chemical formulas are written to help you know the location of each atom. For problems like #17 just try to fill the octet of each atom and try using double bonds to help.
- Sun Nov 29, 2020 10:43 pm
- Forum: Electronegativity
- Topic: Be vs Cl
- Replies: 49
- Views: 2661
Re: Be vs Cl
As a general rule, you can determine which is more electronegative based on the atoms' proximity to the top right corner. In this case, Cl is much closer to the top right and is much more electronegative.
- Sun Nov 29, 2020 10:38 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Bond Order
- Replies: 14
- Views: 972
Re: Bond Order
When the bond order is zero, the molecule is too unstable and won't continue to exist.
- Sun Nov 29, 2020 10:36 pm
- Forum: Bond Lengths & Energies
- Topic: Boiling/Melting Point
- Replies: 29
- Views: 1144
Re: Boiling/Melting Point
Intermolecular forces like london dispersion and hydrogen bonding play a big role in boiling and melting points.
- Sun Nov 22, 2020 10:38 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionization Energy
- Replies: 19
- Views: 729
Re: Ionization Energy
The outermost electrons will be the first to go as they are furthest away from the nucleus and experience electron shielding which makes them easier to be separated.
- Sun Nov 22, 2020 10:21 pm
- Forum: Bond Lengths & Energies
- Topic: Boiling/Melting Point
- Replies: 29
- Views: 1144
Re: Boiling/Melting Point
Intermolecular forces such as London forces and hydrogen bonding will require more energy to break bonds and allow boiling to occur.
- Sun Nov 22, 2020 9:25 pm
- Forum: Trends in The Periodic Table
- Topic: Ionic Character
- Replies: 11
- Views: 490
Re: Ionic Character
The difference in electronegativity. If the difference is >2, it is ionic, and if it is <1.5 the bond is covalent.
- Sun Nov 22, 2020 9:19 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: London Dispersion
- Replies: 33
- Views: 1672
Re: London Dispersion
London forces are always occurring but they aren't as significant on smaller molecules, especially when compared to other intermolecular forces.
- Sun Nov 22, 2020 9:16 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: polarity from lewis structure
- Replies: 7
- Views: 272
Re: polarity from lewis structure
Because of the linear structure, the dipoles cancel out and it is nonpolar.
- Sun Nov 15, 2020 11:37 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Structure plausibility
- Replies: 5
- Views: 290
Re: Structure plausibility
The most stable structure will be the one with the least formal charges, but the location of those charges is also important. It is more stable for the negative formal charges to be on the more electronegative atoms and positive formal charges on the less electronegative atoms. Sapling #5 is a good ...
- Sun Nov 15, 2020 11:26 pm
- Forum: Dipole Moments
- Topic: London Dispersion forces
- Replies: 14
- Views: 505
Re: London Dispersion forces
All molecules experience London Dispersion forces. The sapling problem was probably asking you to choose the most apparent force present.
- Sun Nov 15, 2020 11:16 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Oxidations Numbers
- Replies: 4
- Views: 452
Re: Oxidations Numbers
Thanks for the resources and explanations. I was really confused with oxidation #'s.
- Sun Nov 15, 2020 11:12 pm
- Forum: Dipole Moments
- Topic: London Dispersion Forces
- Replies: 4
- Views: 150
Re: London Dispersion Forces
Dispersion forces are present between all molecules. The strength of those forces increases with the size of the molecules involved.
- Sun Nov 15, 2020 11:09 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm 2
- Replies: 23
- Views: 802
Re: Midterm 2
The midterm is still during our discussion sections so it's the same amount of time.
- Sun Nov 08, 2020 8:58 pm
- Forum: Ionic & Covalent Bonds
- Topic: Oxidation number
- Replies: 7
- Views: 180
Re: Oxidation number
Thanks for all the resources! This helped a lot!
- Sun Nov 08, 2020 8:47 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm 2 Question Count
- Replies: 17
- Views: 588
Re: Midterm 2 Question Count
I'm not sure about the number of questions, but I think it's safe to assume that it will be worth the same amount of points and that the format (respondus) will be the same as well.
- Sun Nov 08, 2020 8:42 pm
- Forum: Trends in The Periodic Table
- Topic: # of electrons
- Replies: 23
- Views: 614
Re: # of electrons
Assuming the atom is neutral, the # of electrons will = the number of protons (given by the atomic number).
- Sun Nov 08, 2020 8:38 pm
- Forum: Trends in The Periodic Table
- Topic: Tips for learning the trends in the Periodic table
- Replies: 11
- Views: 632
Re: Tips for learning the trends in the Periodic table
Charts like these are a great visual to help learn the trends but you should definitely try to back the visuals up with an understanding of the concepts.
- Sun Nov 08, 2020 8:28 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Taking Bio and Chem simultaneously
- Replies: 26
- Views: 2156
Re: Taking Bio and Chem simultaneously
The advice I got from premeds from earlier years was to choose bio or chem to do first along with math and then take the other science after. I guess taking both at the same time is doable, but I don't have the study habits to sustain that level of work so I'm taking bio after I finish chem.
- Sun Nov 01, 2020 11:26 pm
- Forum: SI Units, Unit Conversions
- Topic: Memorizing SI Units
- Replies: 14
- Views: 2459
Re: Memorizing SI Units
I think you definitely want to have a good idea of the SI units but the weirder conversions are usually on the formula sheet unless we are told otherwise.
- Sun Nov 01, 2020 11:21 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2984740
Re: Post All Chemistry Jokes Here
How are Copper and Zinc related?
They're CuZn's
They're CuZn's
- Sun Nov 01, 2020 11:16 pm
- Forum: DeBroglie Equation
- Topic: Avogadro's Number
- Replies: 21
- Views: 1542
Re: Avogadro's Number
Avogadro's' number is the constant number of any type of particle in a mole. For example, when you are given the molar mass of Hydrogen, that is the weight of 6.022x10^23 hydrogen atoms.
- Sun Nov 01, 2020 11:10 pm
- Forum: Student Social/Study Group
- Topic: Halloween!!!
- Replies: 73
- Views: 3090
Re: Halloween!!!
I watched a movie with my family! It wasn't horror though lol.
- Sun Nov 01, 2020 11:02 pm
- Forum: Student Social/Study Group
- Topic: Test Scored for Midterm 1
- Replies: 49
- Views: 1996
Re: Test Scored for Midterm 1
I believe my TA mentioned them being graded by this Friday.
- Sun Oct 25, 2020 11:39 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Advice for studying
- Replies: 92
- Views: 6482
Re: Advice for studying
I recently went to my first workshop and it was super helpful. Also, the modules are really useful if you want to zero in on a specific concept that you are unsure about.
- Sun Oct 25, 2020 11:35 pm
- Forum: Student Social/Study Group
- Topic: Midterm Materials
- Replies: 2
- Views: 81
Re: Midterm Materials
In some of Dr. Lavelle's emails, he sends pdf's titled "Constants and Equations" and "Periodic Table" for us to print out so you should definitely find those and have them ready. Also, my TA said that any calculator should be fine.
- Sun Oct 25, 2020 11:30 pm
- Forum: General Science Questions
- Topic: Webcams for Midterm
- Replies: 6
- Views: 207
Re: Webcams for Midterm
I found this in a post from Dr. Lavelle: "For midterms and final, joining the Zoom proctoring session using your cell phone is another option. The student needs to make sure they have Zoom set up on their phone with their UCLA account, and the link to the Zoom session. Using your phone seems mo...
- Sun Oct 25, 2020 11:08 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Module #18
- Replies: 5
- Views: 140
Re: Module #18
I think because the uncertainty is given in terms of the radius it's best to stick with the given values and not solve in terms of the diameter. It might be solvable either way but it seems like it's an unneeded step.
- Sun Oct 25, 2020 8:46 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Module #18
- Replies: 5
- Views: 140
Re: Module #18
Did they just omit the 1 in 1x10^8 then? I guess that's equivalent but it definitely threw me off.
- Sun Oct 18, 2020 11:20 pm
- Forum: Photoelectric Effect
- Topic: Sapling clarification
- Replies: 15
- Views: 495
Re: Sapling clarification
Are these sapling problems similar to what we might see on the midterm? Or should I focus more on the textbook problems in that regard?
- Sun Oct 18, 2020 11:17 pm
- Forum: Student Social/Study Group
- Topic: Step Up Sessions
- Replies: 9
- Views: 352
Re: Step Up Sessions
I'm starting to notice that I need a lot more extra practice so I'll check these sessions out. Thanks!
- Sun Oct 18, 2020 10:55 pm
- Forum: Einstein Equation
- Topic: Einstein Equation
- Replies: 10
- Views: 1823
Re: Einstein Equation
The ν used for frequency is the greek letter "nu" which looks almost identical to a v. I think for the most part problems should be pretty clear on what is being asked for, such as when a wavelength is given.
- Sun Oct 18, 2020 10:41 pm
- Forum: Photoelectric Effect
- Topic: Sapling clarification
- Replies: 15
- Views: 495
Re: Sapling clarification
I was quite confused about this. Thanks!
- Sun Oct 18, 2020 10:32 pm
- Forum: Student Social/Study Group
- Topic: How are you studying?
- Replies: 204
- Views: 17460
Re: How are you studying?
This whole thread is super helpful, thanks for all the tips! Still trying to adjust to college classes lol.
- Sun Oct 11, 2020 8:45 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Sapling HW Number 7
- Replies: 12
- Views: 449
Re: Sapling HW Number 7
Hello everyone i was wondering if anyone could help me with molarity because i never really captured it and i feel like im behind on it. Also if anyone whos where to find actual tutors please let me know. Molarity is the molar concentration of a compound, the formula being M=n/v with the variables ...
- Sun Oct 11, 2020 8:33 pm
- Forum: SI Units, Unit Conversions
- Topic: Textbook
- Replies: 22
- Views: 613
Re: Textbook
I can get to the homework problems through CCLE but how do I get to the textbook with the free trial? If you can get onto sapling, the textbook should be available on the far right side when you are on the main class page with the big bold "University of California, Los Angeles - CHEM 14A - Fa...
- Sun Oct 11, 2020 8:29 pm
- Forum: SI Units, Unit Conversions
- Topic: Showing Work
- Replies: 8
- Views: 162
Re: Showing Work
AP Chem provided partial credit for work that shows the correct concepts and formulas being applied even if answers don't end up being correct. I'm assuming the same thing will happen in the midterms and final to some extent.
- Sun Oct 11, 2020 8:23 pm
- Forum: Limiting Reactant Calculations
- Topic: How do we find the amount of oxygen in combustion?
- Replies: 10
- Views: 4445
Re: How do we find the amount of oxygen in combustion?
Why does combustion always result in H2O and CO2 and not other compounds? From what I understand, in an ideal combustion reaction H20 and CO2 are the only products. An example of different compounds being released is in an incomplete combustion reaction (which occurs due to a poor supply of O2) whe...
- Sun Oct 11, 2020 8:07 pm
- Forum: Limiting Reactant Calculations
- Topic: Sapling HW 10
- Replies: 9
- Views: 805
Re: Sapling HW 10
You can use the molecular formulas to find the molar mass, but I just searched it up and got molar mass of butanone on the internet. You would only need to know the formulas for the 2-butanone and 3-methyl-3-hexanol since the other product is in excess. To approach the problem, first use the densit...