## Search found 72 matches

Fri Jan 22, 2021 9:49 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Sapling #5
Replies: 4
Views: 26

### Re: Sapling #5

Hello, This is the reaction: B(aq)+H2O(l)↽−−⇀BH+(aq)+OH−(aq)Kb=[BH+][OH−][B] In the chemical reaction, B represents the amine. [ OH− ] = [ BH+ ] because same mole ratio 1:1. Use the pH to determine the pOH and then the [ OH− ]. pOH=14.00−pH Then do the inverse of log 10^(your pOH), which is x. Then...
Thu Jan 21, 2021 11:28 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Studying for Midterm #1
Replies: 63
Views: 146

### Re: Studying for Midterm #1

Book problems all the way! Most of the questions on his exams are very much modeled after the textbook so safe bet is to practice those questions.
Thu Jan 21, 2021 11:26 pm
Forum: Administrative Questions and Class Announcements
Topic: Exam 1 Logistics
Replies: 5
Views: 42

### Re: Exam 1 Logistics

Hi! So I believe everything on outlines 1 and 2 will be on the exam, along with all of the thermo material we've learned up until this Friday (1/22). Dr. Lavelle will most likely send out an email soon with specific details.
Thu Jan 21, 2021 11:25 pm
Forum: Administrative Questions and Class Announcements
Topic: Homework
Replies: 9
Views: 52

### Re: Homework

I think the best bet moving forward is to just check sapling itself because Dr. Lavelle puts the due date in parentheses next to the assignment.
Thu Jan 21, 2021 11:23 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Ka vs. Kb
Replies: 30
Views: 91

### Re: Ka vs. Kb

Hi! Very similar to what people said above but Ka is the acidity constant while Kb is the basicity constant. Like their names say, Ka would be used when your sample in question is considered to be an acid, while Kb would be used when your sample in question is considered to be a base. If you multipl...
Thu Jan 21, 2021 11:21 pm
Forum: Phase Changes & Related Calculations
Topic: phase transition
Replies: 13
Views: 46

### Re: phase transition

Very similar to what everyone else said above, but during phase changes, the heat is going towards breaking the hydrogen bonds, so the heat is therefore absorbed (endothermic). Once the bonds have been broken, the water will continue to heat up until the point where enough energy/ temperature is ach...
Tue Jan 19, 2021 10:16 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Rounding E Values in ICE charts
Replies: 17
Views: 51

### Rounding E Values in ICE charts

Hi! I am still a little confused as to when we are allowed to round the E value in the ICE chart. What classifies a K value as being small enough that it won't affect the equilibrium concentration?
Thu Jan 14, 2021 11:37 pm
Forum: Administrative Questions and Class Announcements
Topic: midterms
Replies: 7
Views: 42

### Re: midterms

No, I believe (not 100% sure on these dates though) the first midterm will be on Friday, January 29th, and the second one will be on Friday, February 19th, both during the times of our lecture sections.
Thu Jan 14, 2021 11:34 pm
Forum: Administrative Questions and Class Announcements
Topic: More Audio Visual Focus Topics
Replies: 8
Views: 22

### Re: More Audio Visual Focus Topics

What like a lot of people said ^^ but I think Audio Visual Focus topics are mostly to ease us into the course, so its only for the first few sections.
Thu Jan 14, 2021 11:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Participation
Replies: 18
Views: 114

### Re: Participation

Participation comes from both! Just as long as you're keeping up with the 5 per week you should be good to go.
Thu Jan 14, 2021 11:29 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: H2O as a Gas
Replies: 69
Views: 408

### Re: H2O as a Gas

Hi! The rule is that in general, gases are always included no matter which molecule, and liquids and solids should always be excluded no matter which molecule. Even though H2O may typically be seen in its liquid form, if its in a gas form it should be included.
Thu Jan 14, 2021 11:26 pm
Forum: Administrative Questions and Class Announcements
Topic: Calculator for exams
Replies: 28
Views: 85

### Re: Calculator for exams

Yup like what everyone else said above, I believe both graphic and scientific are allowed. I normally use my scientific but in 14A one time I couldn't find it, so I used my graphing instead and my TA was fine with it.
Mon Jan 11, 2021 5:27 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Calculating for [OH-] and [H3O+]
Replies: 6
Views: 50

### Calculating for [OH-] and [H3O+]

When we're given the Kw value and either the concentration values of OH- or H3O+, do we have to add the stoichiometric coefficient as the exponent when solving for the missing concentration?
Fri Jan 08, 2021 11:02 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kc to Kp
Replies: 8
Views: 61

### Re: Kc to Kp

My TA gave us the equation:
Kp=(Kc)(RT)^[(z+q)-(x+y)]
when considering the reaction:
xA(g) + yB(g) <--> zC(g) +qD(g)
Hope this helps!
Fri Jan 08, 2021 11:00 pm
Forum: Ideal Gases
Topic: Kc vs Kp
Replies: 109
Views: 940

### Re: Kc vs Kp

Hi! I was also confused by this initially because in AP chem we brushed over this concept pretty quickly. But the difference is mainly that Kp deals with partial pressures of gases while Kc is in consideration of the concentrations of gases. Both are equilibrium constants of gas though.
Fri Jan 08, 2021 10:57 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Calculator Trick for ICEbox Calculations
Replies: 13
Views: 116

### Re: Calculator Trick for ICEbox Calculations

Woah this is really cool! Thanks for this! It's going to save some time.
Fri Jan 08, 2021 10:55 pm
Forum: Ideal Gases
Topic: Ideal Gas Definition
Replies: 10
Views: 44

### Re: Ideal Gas Definition

Hi! A few differences between an ideal gas and a real gas are that ideal gases have no volume, have no molecular attractions, and follow gas laws at all pressures and temperatures, while real gases have volume, have molecular attraction, and differ at low temperatures and high pressure. Hope this he...
Fri Jan 08, 2021 6:27 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: sapling week 1 #9
Replies: 15
Views: 190

### Re: sapling week 1 #9

Can someone explain why N2 and O2 would be .1 in the ICE table and why we have to calculate for the reverse reaction?
Sat Dec 12, 2020 4:24 pm
Forum: Properties of Light
Topic: E=PC
Replies: 1
Views: 14

### E=PC

Hi! On the equation sheet we're allowed on the final, there's the equation E=PC. Would the E in this equation be referring to Ephoton or the kinetic energy? I saw an example problem that used this equation in the context of kinetic energy so I got confused.
Sat Dec 12, 2020 2:37 am
Forum: Naming
Topic: en, dien, edta, etc.
Replies: 2
Views: 30

### en, dien, edta, etc.

Will we need to know the neutral ligands "en" and "dien", and the anion ligands oxalate and "edta" for the final?
Sat Dec 12, 2020 2:33 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: (CO3) 2-
Replies: 5
Views: 43

### (CO3) 2-

Why is (CO3)-2 considered monodentate/bidentate? I wasn't sure how to determine this based off of the lewis structure.
Thu Dec 10, 2020 4:25 pm
Forum: Student Social/Study Group
Topic: Anxiety
Replies: 42
Views: 242

### Re: Anxiety

Hey, just a couple of more days left! We've got this. I try to take breaks and limit my chemistry studying to 1 hour periods at a time. That way you keep yourself from being consumed from chemistry. Taking deep breaths, going on walks, and eating are great ways to take your mind off!
Thu Dec 10, 2020 4:04 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 203
Views: 1298

### Re: How are you studying?

Textbook problems and office hour sessions!
Thu Dec 10, 2020 3:59 pm
Forum: Conjugate Acids & Bases
Topic: Alkaline
Replies: 15
Views: 89

### Re: Alkaline

Yes you're correct! Alkaline does mean basic, at least in the context of this course.
Thu Dec 10, 2020 3:37 pm
Forum: Trends in The Periodic Table
Topic: Finding Charge
Replies: 4
Views: 58

### Re: Finding Charge

Hi! So when we're finding the charge for transition metals, we'll most likely only be asked in the context of a compound, instead of just the element itself. For example, with CuO, we know that the ionic charge (oxidation number) of oxygen is -2, so in order to balance the overall charge of the comp...
Thu Dec 10, 2020 3:31 pm
Forum: Administrative Questions and Class Announcements
Topic: FINAL EXAM QUESTIONS
Replies: 24
Views: 289

### Re: FINAL EXAM QUESTIONS

I think only some will be, but from the last midterms, the other remaining questions were modeled after homework questions, so doing them regardless will be helpful!
Thu Dec 10, 2020 3:29 pm
Forum: Administrative Questions and Class Announcements
Topic: Naming on Final
Replies: 9
Views: 81

### Re: Naming on Final

Yes, I think memorizing them will be the best bet, but I'm sure that they will be kept relatively simple for us because we have to memorize!
Thu Dec 10, 2020 11:54 am
Forum: Lewis Structures
Topic: Lewis Acids and Bases
Replies: 3
Views: 36

### Lewis Acids and Bases

Why B(OH)3 is considered a lewis acid (sapling #6 in chemical bond section)?
Fri Dec 04, 2020 8:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Date
Replies: 21
Views: 219

### Re: Final Exam Date

Dr. Lavelle just sent out an email stating that our final will be on December 13th from 11:30 AM to 1PM.
Fri Dec 04, 2020 8:28 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxidation Number
Replies: 6
Views: 59

### Re: Oxidation Number

Yes you are exactly correct. I think a good way to think about it is just to remember that the overall charge of the cation and anion should equal zero. You can do: X + (0)(NH3) + (-1) + 2(-1) = 0 where x is the unknown oxidation number for cobalt, NH3 is a neutral atom, and chlorine (a halogen) is ...
Fri Dec 04, 2020 8:24 pm
Forum: Student Social/Study Group
Topic: Practice Exam for Final
Replies: 23
Views: 257

### Re: Practice Exam for Final

I don't think that there are any practice exams, but according to what Dr. Lavelle said, studying homework problems and going to review sessions should be enough! Best of luck to you!
Fri Dec 04, 2020 8:23 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Numbers
Replies: 8
Views: 55

### Re: Coordination Numbers

It's just the number of bonds that ions, atoms, or molecules form with the central atom!
Wed Nov 25, 2020 11:10 pm
Forum: Administrative Questions and Class Announcements
Topic: Updating Respondus Lockdown Browser
Replies: 8
Views: 219

### Re: Updating Respondus Lockdown Browser

Safest bet before exams is just to delete and redownload respondus I think, but I also didn't have to update.
Wed Nov 25, 2020 11:06 pm
Forum: Student Social/Study Group
Topic: Finals!
Replies: 43
Views: 350

### Re: Finals!

Cumulative I believe! And Dr. Lavelle also said he'd go over the most missed questions from each midterm during an OH review session!
Wed Nov 25, 2020 11:05 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bonds
Replies: 4
Views: 35

### Re: Bonds

To my understanding, the type of bond (single, double, triple) would not affect the bond angle, since bond angle is largely influenced by election repulsion.
Fri Nov 20, 2020 9:45 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 178
Views: 981

### Re: Favorite TV shows

Besides shows, what are some movies you guys are watching right now? I'm trying to get into the holiday spirit, so any Christmas movie recs?
Fri Nov 20, 2020 9:44 pm
Forum: Electronegativity
Topic: Trick for remembering periodic trends
Replies: 11
Views: 126

### Re: Trick for remembering periodic trends

Thanks for this! I've never seen this before, it's super helpful in memorizing! I also like to remember than the only trend that differs from the rest is essentially just atomic radius and metallic character, while electron affinity, electronegativity, ionization energy, and nonmetallic character ar...
Fri Nov 20, 2020 9:42 pm
Forum: Student Social/Study Group
Topic: Post Midterm Blues
Replies: 71
Views: 614

### Re: Post Midterm Blues

This class gives a lot of stress considering that we basically only have three exams that determine the majority of our grade, but seriously no worries! We've all got this!
Fri Nov 20, 2020 9:41 pm
Forum: Student Social/Study Group
Replies: 110
Views: 1177
Yeah I also always worry about grades since there are only 3 exams and each are worth a ton. We only have 35 points total to miss if we want to maintain a 4.00 I believe, otherwise we will drop to the next gpa down. No worries though! We've got this!
Fri Nov 20, 2020 9:39 pm
Forum: Student Social/Study Group
Topic: post midterm 2
Replies: 27
Views: 297

### Re: post midterm 2

I took the midterm two days ago and I think honestly unplugging and not doing additional chemistry work is the best option. I mean we don't want to get too exhausted from the material!
Tue Nov 17, 2020 9:22 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Cu and Cr Exceptions
Replies: 3
Views: 37

### Cu and Cr Exceptions

I understand that there are electron configuration exceptions for chromium and copper, where we would fill the 3d orbitals before filling the 4s orbital, but is this also the case for the rest of the 5th and 11th groups? For example, would Tungsten also follow the same rule as chromium, and would go...
Sun Nov 15, 2020 9:54 pm
Forum: Lewis Structures
Topic: Expanded Octets
Replies: 1
Views: 24

### Expanded Octets

Why is it that lewis structures with octets have higher energy than those with expanded octets?
Sun Nov 15, 2020 3:57 pm
Forum: Quantum Numbers and The H-Atom
Topic: Scandium Exception
Replies: 1
Views: 26

### Scandium Exception

Hi! So I remember Dr. Lavelle explaining how because the 3d subshell is slightly lower in energy than the 4s , we would write scandium as [Ar] 3d^1 4s^2 and not [Ar] 4s^2 3d^1. Would this also be the case for the rest of the 3d elements, like titanium and vanadium, for example?
Fri Nov 13, 2020 9:43 pm
Forum: Resonance Structures
Topic: Resonance Hybrids
Replies: 2
Views: 21

### Resonance Hybrids

For the question: Draw the Lewis structures that contribute to the resonance hybrid of nitryl chloride, ClNO2, where N is the central atom. I understand how there can be resonance in the bonds between the nitrogen and two oxygen atoms, but can there also be resonance in the bond between chlorine and...
Fri Nov 13, 2020 9:37 pm
Forum: Dipole Moments
Topic: Dipole dipole vs LDF
Replies: 10
Views: 61

### Re: Dipole dipole vs LDF

I was a bit confused on this too, but just remember that nonpolar molecules can ONLY exhibit LDFs, while polar molecules can exhibit more than one intermolecular force, including LDFs.
Fri Nov 13, 2020 9:36 pm
Forum: Lewis Structures
Topic: Recognizing lowest formal charge
Replies: 11
Views: 50

### Re: Recognizing lowest formal charge

Unfortunately, I think for this we do have to calculate the formal charge after drawing each lewis structure. For me at least, this is the only way to verify which structure has the most 0 formal charges on atoms.
Fri Nov 13, 2020 9:34 pm
Forum: Lewis Structures
Topic: Chemical Names
Replies: 9
Views: 62

### Re: Chemical Names

I'm sure for the midterm, problems will give us the formula and will have us create lewis structures off of that. I'm guessing because Dr. Lavelle hasn't gone over this, he wouldn't put that on the midterm.
Fri Nov 13, 2020 9:33 pm
Forum: Student Social/Study Group
Topic: Conceptual Questions Resource?
Replies: 8
Views: 93

### Re: Conceptual Questions Resource?

Khan Academy, Organic Chemistry Tutor, Professor Dave, and TA/UA learning sessions have all been super helpful for me, especially for this unit because it does have more conceptual content!
Wed Nov 04, 2020 5:26 pm
Forum: Student Social/Study Group
Topic: Post Midterm Blues
Replies: 71
Views: 614

### Re: Post Midterm Blues

I definitely felt the exact same way! I stressed so much after taking the exam, mentally going over every single step I might have messed up on. But it's all preparing and bettering ourselves for the next time! Just because we don't do particularly well on one exam, doesn't discredit us for the rest...
Wed Nov 04, 2020 5:21 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 178
Views: 981

### Re: Favorite TV shows

My friend just recommended me Unbreakable Kimmy Schmidt on Netflix, and it is SO GOOD. It's very situationally different from all of the other sitcoms I've watched on Netflix, but still equally as funny.
Wed Nov 04, 2020 5:19 pm
Forum: Resonance Structures
Topic: Electron spin
Replies: 12
Views: 47

### Re: Electron spin

Hi! I don't think that there is a mathematical formula to calculate whether the 1/2 will be positive or negative (or at least one that we'll have to know for the midterm specifically), but we do know that two electrons are always the opposite spin of each other within one orbital. Therefore, if the ...
Wed Nov 04, 2020 5:16 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 2A.21 Textbook Question
Replies: 5
Views: 27

### Re: 2A.21 Textbook Question

I would say to just remember that remembering the 3d orbital and the chromium, copper, and scandium exceptions, and knowing that the 3d orbital is of slightly lower energy than 4s is more important.
Wed Nov 04, 2020 5:09 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Scores
Replies: 28
Views: 269

### Re: Midterm Scores

I heard a TA say in an Office Hours that the scores will be released tomorrow afternoon!
Thu Oct 29, 2020 7:07 pm
Forum: Administrative Questions and Class Announcements
Topic: 1C extra problems
Replies: 3
Views: 33

### Re: 1C extra problems

Hi! If I'm not mistaken, I believe that 1C material will not be included on the midterm, so Dr. Lavelle didn't list any extra problems for it.
Thu Oct 29, 2020 7:05 pm
Forum: Properties of Light
Topic: Is c always the speed of light?
Replies: 88
Views: 457

### Re: Is c always the speed of light?

For our purposes and for the equations we know already, yes, C will always be equal to the speed of light, or 3x10^8 m/s. Hope this helps!
Thu Oct 29, 2020 7:04 pm
Forum: Properties of Light
Topic: Midterm
Replies: 42
Views: 390

### Re: Midterm

The midterm is not open note and includes material from the fundamentals section all the way up to 1D.2, or wave functions, in the textbook! There are UA resources, office hours, and textbook problems to reference as resources to practice too, so you'll be all set for the test! Best of luck :)
Tue Oct 27, 2020 4:58 pm
Forum: *Shrodinger Equation
Topic: Delta V value
Replies: 5
Views: 65

### Re: Delta V value

Hello, did you check to see if this was one of the questions in the textbook with an incorrect solution? The correct way to approach this problem would be to double the 5 to get a change in velocity of 10. You would not double the velocity if it said something like the change in velocity is equal t...
Tue Oct 27, 2020 4:58 pm
Forum: *Shrodinger Equation
Topic: Delta V value
Replies: 5
Views: 65

### Re: Delta V value

Selena Quispe 2G wrote:Hi! So the textbook answer is wrong and Lavelle clarifies this through his Solution Manual Sheet on his website! You were supposed to double in this problem! I hope this helps!!

Ah thank you so much! I was so confused haha.
Tue Oct 27, 2020 4:41 pm
Forum: *Shrodinger Equation
Topic: Delta V value
Replies: 5
Views: 65

### Delta V value

Hi! I'm still a bit confused as to when we should be doubling and when we are not supposed to double the delta v value. For example, for question 27 from 1B in the textbook (A bowling ball of mass 8.00 kg is rolled down a bowling alley lane at 5.00 ± 5.0 m⋅s-1. What is the minimum uncertainty in its...
Mon Oct 26, 2020 7:05 pm
Forum: Properties of Electrons
Topic: Energy emitted per grams of atoms.
Replies: 2
Views: 17

### Energy emitted per grams of atoms.

On part B for question 7 in section 1.B of the textbook, the question asks for the energy emitted if 5.00 mg of sodium atoms were emitting light at the wavelength of 589 nm. Why is it that you have to multiply the atoms of sodium found in part B with the joules found in part A instead of dividing th...
Sun Oct 25, 2020 6:55 pm
Forum: DeBroglie Equation
Topic: De Broglie's Equation vs C=wavelength(v)
Replies: 8
Views: 75

### De Broglie's Equation vs C=wavelength(v)

I was working through a few practice problems for the midterm and was confused as to when I should be using the de broglie equation versus the wavelength=c/v equation to solve for the wavelength or frequency. For example, in this problem, you would use the wavelength = c/v equation: If 3.61x10^-19 i...
Wed Oct 21, 2020 6:14 pm
Forum: Properties of Light
Topic: N2 vs N1
Replies: 6
Views: 77

### N2 vs N1

For problem #11 on the Sapling Homework (A violet line is observed at 434.0 nm in the spectrum of atomic hydrogen. Determine the values of n for the beginning and ending energy levels of the electron during the emission of energy that leads to this spectral line), why is it that 5 is N2 and 2 is N1?...
Mon Oct 19, 2020 11:46 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 203
Views: 1298

### Re: How are you studying?

I'd take notes and do most if not all of the practice problems on the syllabus! Then if you need any extra resources, step up session are a great place to get that extra help! The UA's are so so helpful.
Mon Oct 19, 2020 11:27 pm
Forum: General Science Questions
Topic: Webcams
Replies: 17
Views: 128

### Re: Webcams

I believe that they are recommended if the camera on your device is not functional. They use the cameras to monitor your workspace, so if your camera is foggy or broken, you'll need to get a new one.
Mon Oct 19, 2020 11:25 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Absorption vs Emission Spectrum
Replies: 4
Views: 47

### Absorption vs Emission Spectrum

In atomic spectroscopy, what is the difference between atomic absorption and emission spectroscopy? What do each produce and why?
Mon Oct 19, 2020 11:16 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 203
Views: 1298

### Re: How are you studying?

I completely understand being lost in chemistry, seeing that the pace is really fast! But to combat this, I try to take advantage of a little bit of all of our many resources! Of course we have the textbook and sapling to practice off of, but we also have the learning modules with really great and i...
Mon Oct 19, 2020 11:14 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8549
Views: 1474893

### Re: Post All Chemistry Jokes Here

Do you want to hear a joke about sodium, bromine, and oxygen?
NaBrO.
Tue Oct 13, 2020 4:40 pm
Forum: Properties of Electrons
Topic: Wave-particle duality
Replies: 2
Views: 132

### Re: Wave-particle duality

Yes, it does. Wave–particle duality is the concept in quantum mechanics that every particle or quantum entity may be described as either a particle or a wave. It expresses the inability of the classical concepts "particle" or "wave" to fully describe the behavior of quantum-scale...
Tue Oct 13, 2020 4:34 pm
Forum: SI Units, Unit Conversions
Topic: Metric Conversions
Replies: 9
Views: 118

### Metric Conversions

Hi! I forgot a lot of my acronyms from AP Chem over the summer, so do you guys have any acronyms to help remember the metric conversions? (kilo, hecto, deci, centi...)
Tue Oct 13, 2020 4:33 pm
Forum: Significant Figures
Topic: Easy 3 Rules
Replies: 9
Views: 112

### Re: Easy 3 Rules

Thank you for this! I don't know why, but sig figs have always been the most challenging thing to wrap my head around, though its one of the simplest topics.
Tue Oct 13, 2020 4:31 pm
Forum: SI Units, Unit Conversions
Topic: Formula Units v.s Molecules
Replies: 4
Views: 44

### Re: Formula Units v.s Molecules

A molecule is composed of two or more elements that are covalently bonded. It is the smallest particle of a covalent substance that has all of the properties of that substance, and it is the smallest particle of that substance that can participate in a chemical reaction. A formula unit indicates the...
Tue Oct 13, 2020 4:27 pm
Forum: Properties of Light
Topic: Photoelectric Effect Module Problem
Replies: 4
Views: 30

### Photoelectric Effect Module Problem

I was going through the pre-assessment for the photoelectric effect module and had trouble working through number 27: "Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 105 m.s-1. The work function for sodium is 150.6 kJ.mol-1." I know that you can use th...