Search found 80 matches
- Mon Feb 15, 2021 10:07 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Strong Acids/Bases
- Replies: 19
- Views: 1381
Re: Strong Acids/Bases
Definitely using a chart is helpful because not all of these have oh or h in their name making it harder to identify the type of substance.
- Mon Feb 15, 2021 10:03 am
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: higer molar entropy
- Replies: 13
- Views: 656
Re: higer molar entropy
The more space for particles to move the higher the entropy. The lower the atm the bigger the volume.
- Mon Feb 15, 2021 9:59 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Free Energy
- Replies: 49
- Views: 2104
Re: Free Energy
In a sense, it's like looking at exothermal and endothermal graphs where we only focus on the initial and final states.
- Mon Feb 15, 2021 9:38 am
- Forum: Ideal Gases
- Topic: Units for K
- Replies: 29
- Views: 1260
Re: Units for K
yes K is typically a ratio but sometimes pressures can be added to an equation in a similar manner where the pressures are to the power of thier coefficient and where the whole fraction is not equal to 1.
- Sun Feb 07, 2021 11:30 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: hw #11
- Replies: 5
- Views: 274
Re: hw #11
treat T as x and remember that the given temperature becomes into a number which you will divide by the constant attached to T to get your T final. Of course, using numbers on both sides. Usually, double changes in the state of one quantity tend to just be added like the ice fusion value on one of t...
- Sun Feb 07, 2021 11:26 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess's Law
- Replies: 12
- Views: 570
Re: Hess's Law
Definitely, things on both sides are to be canceled.
However, how do we add the energy values and how do the coefficient ratios relate to them?
However, how do we add the energy values and how do the coefficient ratios relate to them?
- Sun Feb 07, 2021 11:22 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: R Constant
- Replies: 91
- Views: 6355
Re: R Constant
Definitely keep in mind the units. Atm seems to be the most common.
- Sun Feb 07, 2021 11:17 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Closed System
- Replies: 52
- Views: 2862
Re: Closed System
The main thing with closed systems is that you can't add anything into the inside of the system besides things like heat that can go through the walls.
- Sun Feb 07, 2021 11:15 pm
- Forum: Calculating Work of Expansion
- Topic: The Sign of Work
- Replies: 7
- Views: 352
Re: The Sign of Work
Well, when it comes to an enclosed gas such as in a valve, by pushing air into it im inputting work into the system possibly introducing more pressure, or when you compress a gas in general that is positive work as it is going into the system. However, when the gas pushes back that is usually consid...
- Sun Feb 07, 2021 11:07 pm
- Forum: Student Social/Study Group
- Topic: Post Midterm 1...
- Replies: 39
- Views: 1782
Re: Post Midterm 1...
Textbook problems help sometimes. Im gonna try attending Lavelle's office hours hopefully that helps a lot.
- Sun Jan 31, 2021 11:37 pm
- Forum: Ideal Gases
- Topic: Inverse Kc [ENDORSED]
- Replies: 41
- Views: 2183
Re: Inverse Kc [ENDORSED]
Remember that in reverse, so do your moles of products and reactants flip.
- Sun Jan 31, 2021 11:35 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Adding a gas
- Replies: 26
- Views: 1165
Re: Adding a gas
It most likely has to do with concentration staying constant, that is the original gases.
- Sun Jan 31, 2021 11:33 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Is partial pressure dependent on moles?
- Replies: 7
- Views: 429
Re: Is partial pressure dependent on moles?
if pressure doubles volume halfes. Therefore, molarity and pressure are quite related.
- Sun Jan 31, 2021 11:31 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Clarification on pKw
- Replies: 15
- Views: 3890
Re: Clarification on pKw
yeah Pkw is basically the total possible Ph or ph of 14 which is usually Pha x Phb.
- Sun Jan 31, 2021 11:28 pm
- Forum: General Science Questions
- Topic: Midterm 1 Reactions
- Replies: 70
- Views: 4802
Re: Midterm 1 Reactions
It was more difficult compared to 14A midterms. The questions weren't like what I prepared for. Would have loved to have prepped with quite similar formats.
- Sun Jan 24, 2021 9:51 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE Tables
- Replies: 36
- Views: 1867
Re: ICE Tables
It depends on what is given. Think of it as an equilibrium reaction where if the products are given instead of reactants you have to decrease products to get your reactants and then use reactants to possibly find the eq concentration of your product.
right everyone? or am I wrong?
right everyone? or am I wrong?
- Sun Jan 24, 2021 9:47 am
- Forum: Phase Changes & Related Calculations
- Topic: Endothermic v. Exothermic
- Replies: 139
- Views: 14384
Re: Endothermic v. Exothermic
Definitely, use the delta H to determine whether is endothermic or exothermic.
- Sun Jan 24, 2021 9:46 am
- Forum: Ideal Gases
- Topic: Omitting solid/liquid
- Replies: 19
- Views: 781
Re: Omitting solid/liquid
Definitely, as stated above do not include nongases nor solvents such as the common H2O except when itls part of the reaction not acting as main solvent that you include the concentration of H20.
- Sun Jan 24, 2021 9:43 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Determining pH
- Replies: 18
- Views: 835
Re: Determining pH
-log(x) function is used to find both the Ph and Poh given the concentrations of OH- or H+. These concentrations are plugged in as x. However, if you are solving and have a Ka value then you cannot directly determine the Poh, you must calculate Ph then -14 and you'll get your Poh.
- Sun Jan 24, 2021 9:40 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: X Approximations
- Replies: 23
- Views: 920
Re: X Approximations
If the Ka or Kb is < 10^-4 then it is fine to ignore the -x from the initial mols.
- Sat Jan 16, 2021 10:00 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Temperature
- Replies: 12
- Views: 586
Re: Temperature
How are we to determine if a chemical equation is endothermic or exothermic? Will it be provided or can we determine this from K values?
- Sat Jan 16, 2021 9:56 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: pH of Weak Acids
- Replies: 11
- Views: 468
Re: pH of Weak Acids
Another factor that might help is whether the pH is higher or lower than 1 or 14.
- Sat Jan 16, 2021 9:49 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE box for partial pressures
- Replies: 10
- Views: 399
Re: ICE box for partial pressures
Yes the process for solving for partial pressures is quite the same as calculating concentrations. However be aware that you might get cubed equations and there is a different process for solving them.
- Sat Jan 16, 2021 9:44 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE Box
- Replies: 28
- Views: 1316
Re: ICE Box
In terms of test taking, I recommend using the ICE box now in order to become more efficient and avoid errors during exams.
- Sat Jan 16, 2021 9:36 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: When x is negligible in Equilibrium constant
- Replies: 34
- Views: 1546
Re: When x is negligible in Equilibrium constant
Yeah this is a bit confusing given that he had mentioned that the concentration had to be smaller than 10^-3 but most recently 10^-4. Lavelle please clarify this.
- Fri Jan 08, 2021 1:31 pm
- Forum: Ideal Gases
- Topic: Units of Temperature
- Replies: 82
- Views: 3819
Re: Units of Temperature
So when using PV=NRT temperature is supposed to be inputted in Kelvin? How come though fro most of the questions so far we are being given temperature in Celcius?
- Fri Jan 08, 2021 1:22 pm
- Forum: Ideal Gases
- Topic: PV=nRT question
- Replies: 6
- Views: 314
Re: PV=nRT question
The question is most likely to ask for one while giving you the units of the other. That is when you rely on PV=NRT to get the units you need based on what you are being asked for.
- Fri Jan 08, 2021 1:20 pm
- Forum: Ideal Gases
- Topic: Bars to atm [ENDORSED]
- Replies: 41
- Views: 1908
Re: Bars to atm [ENDORSED]
Where do we usually encounter the bar unit?
- Fri Jan 08, 2021 1:18 pm
- Forum: Ideal Gases
- Topic: Finding x for K using quadratic equation
- Replies: 6
- Views: 263
Re: Finding x for K using quadratic equation
Since a quadratic equation has two answers one being negative and the other being positive, you will be going with the positive answer given that there is no such thing as negative matter. However, what if we get two positive answers?
- Fri Jan 08, 2021 1:15 pm
- Forum: Ideal Gases
- Topic: Reviewing PV=NRT
- Replies: 7
- Views: 392
Reviewing PV=NRT
Where can we find all the answers to the textbook practice problems? I believe it might be on Lavelle's website but I cannot recall under what tab. Given that this concept requires all sorts of equation solving back and forth it might be a good idea to gain a better grasp by literally applying it in...
- Tue Dec 15, 2020 7:00 pm
- Forum: *Titrations & Titration Calculations
- Topic: Acid/Base bonds
- Replies: 5
- Views: 885
Re: Acid/Base bonds
Good question, it has to do with the components of your acidic molecule. Generally when no O is present just H and some P orbital atom the most electronegative and biggest, towards the bottom makes it more acidic. The more Os are present the more acidic. The higher the overall charge the more acidic...
- Tue Dec 15, 2020 6:56 pm
- Forum: Naming
- Topic: Bis, Tris, Tetrakis
- Replies: 4
- Views: 583
Re: Bis, Tris, Tetrakis
bis, tris, etc is generally used to name molecules or atoms with more than one bond. It seems the mono-, di- prefixes (which indicates how many atoms or molecules are present) is canceled out when dealing with these complex bonds.
- Tue Dec 15, 2020 6:12 pm
- Forum: Bond Lengths & Energies
- Topic: Bond length
- Replies: 9
- Views: 901
Re: Bond length
That is true, bond length relies on center to center distance. However, bonds also decrease these lengths theoretically when bonding more than once.
- Sun Dec 13, 2020 1:54 pm
- Forum: Student Social/Study Group
- Topic: Final Exam
- Replies: 49
- Views: 2701
Re: Final Exam
Definitely, this exam had very little time for the amount and type of questions. Many students either didn't finish or rushed through half of it. Both the mathematical questions and the content questions do rely on more thinking than a usual simpler question on the midterms. Being a bad test taker t...
- Thu Dec 10, 2020 3:40 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: calculating pH or Poh
- Replies: 5
- Views: 949
calculating pH or Poh
How do we solve for these and what is the relationship among them?ph, poh, Ka, Pka
Also when is it that we need molarity in these calculations?
Also when is it that we need molarity in these calculations?
- Thu Dec 10, 2020 3:38 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Strength and Stability of Acids and bases
- Replies: 3
- Views: 160
Strength and Stability of Acids and bases
Hi, how do I know when an acid is strong or weak? Similarly, how do I know the stability such as leaning more to the right or left, etc?
- Sun Dec 06, 2020 9:10 am
- Forum: Resonance Structures
- Topic: Stability
- Replies: 13
- Views: 742
Re: Stability
Resonance structures tend to be stable when there aren't that many charges around it, the shape is in a way balanced, and the pull of bonding atoms canceling out.
- Sun Dec 06, 2020 9:07 am
- Forum: Properties & Structures of Inorganic & Organic Bases
- Topic: List of Strong Bases and Weak Bases
- Replies: 6
- Views: 806
Re: List of Strong Bases and Weak Bases
Definitely memorize the list that Dr.Lavelle gave during the lectures it will assist you. Also probably try to see how OH molecules are formed as that will reveal as well which one is stronger and weaker.
- Sun Dec 06, 2020 9:02 am
- Forum: Sigma & Pi Bonds
- Topic: Sigma and Pi Bonds
- Replies: 24
- Views: 1249
Re: Sigma and Pi Bonds
Most definitely, one bond is a sigma everything after in that same bond region would be Pi bonds because those are the ones that stop rotation for the most part.
- Sun Dec 06, 2020 8:48 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: strong vs weak
- Replies: 10
- Views: 360
Re: strong vs weak
Strong acids have weaker bonds meaning the larger the space in between two atoms the stronger it is.
- Sun Dec 06, 2020 8:47 am
- Forum: Naming
- Topic: Oxidation State
- Replies: 16
- Views: 720
Re: Oxidation State
Why is oxidation state important in acids?
- Sun Nov 29, 2020 9:28 pm
- Forum: Student Social/Study Group
- Topic: Final Format
- Replies: 35
- Views: 1700
Re: Final Format
Will our TA actually go over with us the previous midterms we did if we schedule the appointment? My TA had mentioned something about not being able to view them or something.
- Sun Nov 29, 2020 9:26 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Nonpolar bonds
- Replies: 7
- Views: 225
Re: Nonpolar bonds
Nonpolar bonds are bonds between atoms of the same element as there is no difference in electronegativity and they share the same number of electrons(not sure if electronegativity is a requirement though). A nonpolar molecule is a molecule that has balance forces all around it. For example, a centra...
- Sun Nov 29, 2020 9:19 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angles
- Replies: 4
- Views: 280
Re: Bond Angles
I would recommend that you see molecules in multiple planes of 360, there fore you just divide the 360 degrees by the number of bonds to get the average bond angle in between atoms in that plane, and if there are lone pairs in that plane it would be safe the assume that the angle would be less.
- Sun Nov 29, 2020 9:16 pm
- Forum: Dipole Moments
- Topic: Tetrahedral Atoms and Dipole Moments
- Replies: 7
- Views: 489
Re: Tetrahedral Atoms and Dipole Moments
Dipole moments only occur when dipoles cancel out or when the forces are said to be balanced. The best way to determine if the forces are balanced around the central atom is to determine the shape and determine all forces around that central atom in the molecule.
- Sun Nov 29, 2020 9:00 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polar
- Replies: 10
- Views: 580
Re: Polar
Two or more lone pairs means you have a bent structure. Usually, you can tell polarity by looking at the molecule's shape. If it looks uneven it is most likely to be polar.
- Sun Nov 22, 2020 7:45 pm
- Forum: Electronegativity
- Topic: Periodic trend
- Replies: 17
- Views: 948
Re: Periodic trend
Electronegativity is Electron Affinity (energy released from gain of electrons) plus Ionization energy (Energy needed to release an electron). Thus, all three are basically highest in your top right of your periodic table and decrease as you go left or down.
- Sun Nov 22, 2020 7:42 pm
- Forum: Student Social/Study Group
- Topic: Finals!
- Replies: 43
- Views: 2002
Re: Finals!
Definitely, it will cover all the term's material. However, as long as you been studying well for the last two exams the final should just be a small addition of the new content.
- Sun Nov 22, 2020 7:40 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bonds in depictions of molecular shape
- Replies: 3
- Views: 207
Re: Bonds in depictions of molecular shape
Yes, your solid bonds or triangle-looking bonds are those facing you, while the dashed triangle ones are those facing away, and while the solid lines or regular bonds are those bonds parallel to you.
- Sun Nov 22, 2020 7:36 pm
- Forum: Lewis Structures
- Topic: Central Atom Question
- Replies: 20
- Views: 1226
Re: Central Atom Question
Hydrogen is just one of the very few elements that will never be your central atom. Every other element can be a central atom for the most part as long as they are the one with the least electronegativity in the molecule.
- Sun Nov 22, 2020 7:34 pm
- Forum: Lewis Structures
- Topic: Polar and non polar elements
- Replies: 9
- Views: 585
Re: Polar and non polar elements
Whether an element is polar or not might have to do with whether the element is in ion form or not and the overall properties of the element. There are elements that are very reactive.
- Sun Nov 15, 2020 8:16 pm
- Forum: Ionic & Covalent Bonds
- Topic: Polarity of bonds vs molecules
- Replies: 6
- Views: 210
Re: Polarity of bonds vs molecules
Definitely, if the vectors don't cancel out the atom will be polar. However, are ions always polar since they have a charge?
- Sun Nov 15, 2020 8:08 pm
- Forum: Ionic & Covalent Bonds
- Topic: Resonance Structures
- Replies: 5
- Views: 209
Re: Resonance Structures
How do molecules form resonance structures? I know that at times it's a molecule that puts in both electrons for a bond to form but what are the main rules?
- Sun Nov 15, 2020 8:02 pm
- Forum: Ionic & Covalent Bonds
- Topic: Difference on how atomic size affects covalent and dipole interactions
- Replies: 9
- Views: 2084
Re: Difference on how atomic size affects covalent and dipole interactions
Why is it that a very electronegative atom with an atom with a bigger atomic radius is harder to dissolve than the same atom but with another atom with a smaller radius?
- Sun Nov 15, 2020 7:48 pm
- Forum: Lewis Structures
- Topic: Lewis structures: central atom/ions
- Replies: 1
- Views: 146
Lewis structures: central atom/ions
When it comes to drawing Lewis structures, is our central atom such o in H2O always nuetral or when is it that it gains a positive or negative charge? How am I supposed to know?
In ions can outer atoms hold a positive charge or only negative?
In ions can outer atoms hold a positive charge or only negative?
- Fri Nov 06, 2020 5:30 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 150712
Re: Reading the textbook
I think reading the textbook is sometimes more of a supplement when not understanding things, however it better to read it to better grasp the concepts or engrave them into your memory.
- Fri Nov 06, 2020 5:26 pm
- Forum: Electronegativity
- Topic: Electron Affinity
- Replies: 6
- Views: 165
Re: Electron Affinity
It depends wether its octet is satisfied already. It also depends on its chemical,atomic affinity.
- Fri Nov 06, 2020 5:24 pm
- Forum: Trends in The Periodic Table
- Topic: Bond Length
- Replies: 5
- Views: 181
Re: Bond Length
electron-negativity does have an impact on bond lenqth. The stronger the smaller the bond length. Simply look at it as a sphere the bigger the sphere or the atom in size due to electron cloud being pulled less by the nucleus due to the amount of electrons and nucleus pull.
- Sun Nov 01, 2020 11:55 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: d orbitals
- Replies: 17
- Views: 751
Re: d orbitals
Each letter shell has a different amount of orbitals and so forth. p=3 d=5 f=7
- Sun Nov 01, 2020 11:52 am
- Forum: Trends in The Periodic Table
- Topic: Atomic Radius
- Replies: 30
- Views: 3123
Re: Atomic Radius
More electrons = larger radius
However, there is a bigger increment once they start going into other orbitals or passing N=2.
However, there is a bigger increment once they start going into other orbitals or passing N=2.
- Sun Nov 01, 2020 11:47 am
- Forum: Administrative Questions and Class Announcements
- Topic: Participation Points [ENDORSED]
- Replies: 62
- Views: 3715
Re: Participation Points [ENDORSED]
By what day do we have to post every week?
- Sun Nov 01, 2020 11:42 am
- Forum: *Shrodinger Equation
- Topic: Midterm Scores
- Replies: 30
- Views: 1308
Re: Midterm Scores
He is probably going to post them in a week, I believe they may be curved or something so that might be why he is going to take longer.
- Sun Nov 01, 2020 11:30 am
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 150712
Re: Reading the textbook
Most definitely, when you don't understand something its good to consult the textbook. If that doesn't work ask TAs and UAs. If you can't reach them then just look it up in the internet there could be articles or videos on the topic.
- Sun Nov 01, 2020 10:39 am
- Forum: *Shrodinger Equation
- Topic: N L ML Atoms, Orbitals, number of electrons
- Replies: 3
- Views: 1061
N L ML Atoms, Orbitals, number of electrons
Hi, can someone explain to me what the significance is of each and how to find the number of electrons when Ml is given? Im having trouble understanding what ml means the most when finding the number of electrons.
- Sun Oct 25, 2020 11:48 pm
- Forum: Properties of Light
- Topic: Midterm Conceptual Questions
- Replies: 5
- Views: 293
Re: Midterm Conceptual Questions
As for what kind of concept questions there will be, off the top off my head I'd say definitely know the wave model, diffraction, the photoelectric effect, the particle model, Bohr frequency condition, atomic and molecular spectra, conservation of mass, and conservation of energy. The study guide a...
- Sun Oct 25, 2020 11:44 pm
- Forum: Student Social/Study Group
- Topic: How are you studying?
- Replies: 204
- Views: 20538
Re: How are you studying?
Will we be provided with conversion units for the exam? (such as how many nanometers are in a meter and ml in a liter)
Or are we expected to memorize this?
Or are we expected to memorize this?
- Sat Oct 24, 2020 10:19 am
- Forum: *Particle in a Box
- Topic: Midterm 1
- Replies: 17
- Views: 1388
Re: Midterm 1
Will how to solve for wave functions be on the exam?
Schrodinger's equation
Schrodinger's equation
- Fri Oct 23, 2020 7:13 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Homework up to Q19 and Midterm 1 [ENDORSED]
- Replies: 7
- Views: 270
Re: Homework up to Q19 and Midterm 1 [ENDORSED]
As of now the error has not been fixed in terms of the randomization. It also seems there are no randomizer options from our end.
- Fri Oct 23, 2020 5:42 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Rydberg Frequency Equation Question
- Replies: 5
- Views: 339
Re: Rydberg Frequency Equation Question
That is exactly the same question I had because of sapling homework questions 6 and 8 I believe where in the Rydberg equation n1 and n2 are swapped. Can someone please verify that these flip accordingly wether its an emission of absorption.
- Thu Oct 22, 2020 5:44 pm
- Forum: Photoelectric Effect
- Topic: Intensity vs. Frequency
- Replies: 22
- Views: 1885
Intensity vs. Frequency
What is intensity and what is frequency?
As far as I know frequency is just the amount of cycles per an amount of time or waves. However, what exactly is intensity?
As far as I know frequency is just the amount of cycles per an amount of time or waves. However, what exactly is intensity?
- Sat Oct 17, 2020 3:24 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Where can I buy a webcam for a reasonable price?
- Replies: 60
- Views: 3793
Re: Where can I buy a webcam for a reasonable price?
If you go the route of buying a webcam I would recommend Fry's or Amazon. Possibly B&H as well. Hope this opens your options.
- Sat Oct 17, 2020 3:17 pm
- Forum: Student Social/Study Group
- Topic: How are you studying?
- Replies: 204
- Views: 20538
Re: How are you studying?
Definitely doing a lot of practice problems helps. However, what is the best way to take notes during the recorded lectures? Sometimes I wait for him to go through the whole slide and other times I take the notes as he speaks and thing pop up on the slide.
- Fri Oct 16, 2020 5:26 pm
- Forum: Significant Figures
- Topic: SIG FIGS
- Replies: 13
- Views: 667
Re: SIG FIGS
Yes, if your question has 4 significant figures then your answer should have 4 significant figures.
- Fri Oct 16, 2020 5:15 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Built-in webcams/Equipment request [ENDORSED]
- Replies: 22
- Views: 1604
Re: Built-in webcams/Equipment request [ENDORSED]
For the exam, my TA said that you will need some sort of camera showing your workspace. If your desktop/laptop doesn't have a camera then you will be forced to take out your phone and login to the zoom session via phone where through that camera they will monitor you during the exam.
- Fri Oct 16, 2020 5:10 pm
- Forum: Photoelectric Effect
- Topic: Sapling HW #4 Part 2 Photoelectric
- Replies: 3
- Views: 120
Re: Sapling HW #4 Part 2 Photoelectric
Well for this question you will have to keep in mind the following two equations E(photon energy)=hv and c=wavelength*frequency. You are only given K.E and Frequency. You basically plug in frequency into your "C" equation to get the wavelength then plug in your wavelength into your E(photo...
- Wed Oct 07, 2020 8:16 pm
- Forum: Significant Figures
- Topic: Clarification on Significant Figures
- Replies: 9
- Views: 459
Re: Clarification on Significant Figures
Hope this helps when it comes to significant figures: non-0 numbers are considered significant figures numbers including zeros in between non zero numbers ae considered significant figures as well Zeros in front, or "leading zeroes" are not counted as significant numbers Zeros in back, or ...
- Wed Oct 07, 2020 8:05 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Structure of Exams
- Replies: 5
- Views: 186
Re: Structure of Exams
Will we be expected to know how to read or draw compound drawings/ structures for our exams? (like question 10 on sapling)
- Wed Oct 07, 2020 8:01 pm
- Forum: Empirical & Molecular Formulas
- Topic: Sapling Hw Week 1 #10
- Replies: 20
- Views: 691
Re: Sapling Hw Week 1 #10
Also where can we learn to read such symbols or way of displaying a chemical reaction without the lettering we usually use?
- Wed Oct 07, 2020 8:00 pm
- Forum: Empirical & Molecular Formulas
- Topic: Sapling Hw Week 1 #10
- Replies: 20
- Views: 691
Re: Sapling Hw Week 1 #10
Was this chemical reaction balanced already or did we have to balance it? The one provided in the question
- Mon Oct 05, 2020 1:08 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Sapling Textbook Access Code
- Replies: 10
- Views: 585
Re: Sapling Textbook Access Code
The trial I believe is a week long (7days to be exact) unless they are providing us with an extended version.