Search found 76 matches

by gabbym
Sat Mar 16, 2019 7:23 pm
Forum: Student Social/Study Group
Topic: Midterm
Replies: 2
Views: 15

Re: Midterm

He had a slide on it at the end of class one day. It said like 83% or something, but I wasn't sure exactly what it was
by gabbym
Sat Mar 16, 2019 7:18 pm
Forum: Student Social/Study Group
Topic: Midterm
Replies: 2
Views: 15

Midterm

Hey guys, just out of curiosity, what was the average for the midterm?
by gabbym
Sat Mar 16, 2019 11:07 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Problem 11.27 (sixth edition)
Replies: 1
Views: 8

Problem 11.27 (sixth edition)

In a gas-phase equilibrium mixture of PCl5, PCl3, and Cl2 at 500. K, PPCl5 = 1.18 bar, PCl2 = 5.43 bar. What is the partial pressure of PCl3, given that K = 25 for the reaction PCl5(g) --> PCl3(g) + Cl2(g)? Hi, I don't understand why PCl3 = (25)*(1.18) / (5.43). I would have set PCl3 = (5.43)*(25) /...
by gabbym
Sat Mar 16, 2019 11:01 am
Forum: Student Social/Study Group
Topic: Lyndon's Review Sess
Replies: 6
Views: 62

Re: Lyndon's Review Sess

I can't find it either :(
by gabbym
Sat Mar 16, 2019 10:50 am
Forum: Student Social/Study Group
Topic: Lyndon's Review Sess
Replies: 6
Views: 62

Lyndon's Review Sess

Has Lyndon posted his practice exam yet? I keep typing in "pork ramen" but I don't see anything posted :(
by gabbym
Fri Mar 15, 2019 9:31 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Problem 9.13 Sixth edition
Replies: 1
Views: 14

Problem 9.13 Sixth edition

During the test of an internal combustion engine, 3.00 L of nitrogen gas at 18.5 $C was compressed suddenly (and irreversibly) to 0.500 L by driving in a piston. In the process, the temperature of the gas increased to 28.1 $C. Assume ideal behavior. What is the change in entropy of the gas? For this...
by gabbym
Wed Mar 13, 2019 10:11 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Problem #14.11 (sixth edition)
Replies: 1
Views: 12

Problem #14.11 (sixth edition)

Write the half-reactions and the balanced equation for the cell reaction for each of the following galvanic cells: (a) Ni(s) / Ni2+(aq) // Ag+(aq) / Ag(s) In problems where you are given a cell diagram and asked to find the two half reactions and the balanced equation for the overall reaction, such ...
by gabbym
Wed Mar 13, 2019 10:03 am
Forum: Student Social/Study Group
Topic: Lyndon's Review Session
Replies: 8
Views: 205

Lyndon's Review Session

Hey guys! I was wondering if anyone knew what name Lyndon is using for his practice exam. Please let me know if you hear anything :)
by gabbym
Mon Mar 11, 2019 10:43 am
Forum: Student Social/Study Group
Topic: Professor Lavelle's OH
Replies: 2
Views: 158

Re: Professor Lavelle's OH

Okay, thank you.
by gabbym
Sun Mar 10, 2019 10:30 pm
Forum: Student Social/Study Group
Topic: Professor Lavelle's OH
Replies: 2
Views: 158

Professor Lavelle's OH

Hey guys, when is Professor Lavelle holding office hours for week 10?
by gabbym
Wed Feb 27, 2019 2:19 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: #14.13 Part D (Sixth Edition)
Replies: 1
Views: 23

#14.13 Part D (Sixth Edition)

Can someone explain to me how you know which compounds to use for the reduction reactions? For example, #14.13 Part D asks you to write the half-reactions, the balanced equation for the cell reaction, and the cell diagram for each of the following skeletal equations: Au+(aq) --> Au(s) + Au3+(aq) The...
by gabbym
Wed Feb 27, 2019 2:14 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: #14.13 Part C (Sixth Edition)
Replies: 3
Views: 29

Re: #14.13 Part C (Sixth Edition)

But I'm not understanding how you arrive at that conclusion for the half reactions. How do you know to separate the HCl into Cl- and H+? I would have just put that Cl2 goes to HCl and then H2 goes to HCl
by gabbym
Tue Feb 26, 2019 1:48 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: #14.13 Part C (Sixth Edition)
Replies: 3
Views: 29

#14.13 Part C (Sixth Edition)

Can someone help me with #14.13 Part C? It asks you to write the half-reactions, the balanced equation for the cell reaction, and the cell diagram for each of the following skeletal equations: (c) Cl2(g) / H2(g) --> HCl(aq) I don't understand how they are getting the half reactions. Can someone expl...
by gabbym
Tue Feb 26, 2019 12:38 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: #14.11 Part d (Sixth edition)
Replies: 2
Views: 24

Re: #14.11 Part d (Sixth edition)

Wait I think I got it. You have to approach it like you're balancing a redox equation in basic solution.
by gabbym
Tue Feb 26, 2019 12:25 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: #14.11 Part d (Sixth edition)
Replies: 2
Views: 24

#14.11 Part d (Sixth edition)

I need help with problem 14.1 part d in the sixth edition textbook. It asks you to write the half-reactions and the balanced equation for the cell reaction for each of the following galvanic cells: for the following cell diagram Pt(s) / O2(g) / H+(aq) // OH-(aq) / O2(g) / Pt(s) Can someone just walk...
by gabbym
Tue Feb 12, 2019 9:00 am
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Entropy
Replies: 1
Views: 18

Entropy

Would the entropy be different if the temperature isn't 298K? Or in other words, when using the delta S = nR ln (v2/v1) equation, does temperature matter?
by gabbym
Sun Feb 10, 2019 6:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Lyndon's HOTDOG MIDTERM REVIEW SESSION!! FINALLY!
Replies: 49
Views: 2203

Re: Lyndon's HOTDOG MIDTERM REVIEW SESSION!! FINALLY!

Thank you for doing this for us! Greatly appreciated :)
by gabbym
Sun Feb 10, 2019 6:41 pm
Forum: Student Social/Study Group
Topic: Lyndon's Review Sess
Replies: 3
Views: 49

Re: Lyndon's Review Sess

Thank you so much!
by gabbym
Sun Feb 10, 2019 6:41 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Midterm Next Week
Replies: 6
Views: 57

Re: Midterm Next Week

Thanks!
by gabbym
Sun Feb 10, 2019 6:40 pm
Forum: Student Social/Study Group
Topic: Chemistry News
Replies: 38
Views: 14629

Re: Chemistry News

Here is a really interesting chemistry article about "gummy-like robots that could help prevent disease!"
https://www.sciencedaily.com/releases/2 ... 082155.htm
by gabbym
Sun Feb 10, 2019 6:37 pm
Forum: Administrative Questions and Class Announcements
Topic: Registering/Creating Your Chemistry Community Account
Replies: 17
Views: 15469

Re: Registering/Creating Your Chemistry Community Account

Some TAs check if you're up to date with your posts at the end of each week and some don't. So if you get a little bit behind I wouldn't worry about it too much, just make sure that you do them eventually. There were a couple weeks where I got behind last quarter and I still ended up getting full po...
by gabbym
Sun Feb 10, 2019 6:34 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 95
Views: 26028

Re: Advice from a Medical Student [ENDORSED]

Awesome advice! Thank you so much :)
by gabbym
Sun Feb 10, 2019 6:32 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Midterm Next Week
Replies: 6
Views: 57

Midterm Next Week

So there aren't going to be any questions regarding Gibb's Free Energy on the midterm? (Just double checking)
by gabbym
Sun Feb 10, 2019 6:29 pm
Forum: Student Social/Study Group
Topic: Lyndon's Review Sess
Replies: 3
Views: 49

Lyndon's Review Sess

Does anybody know if Lyndon has posted a practice midterm for his session on Monday? He usually announces what type of food he is going to label it under in lecture but he didn't this time
by gabbym
Sun Feb 10, 2019 6:21 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Standard Enthalpies of Formation
Replies: 3
Views: 34

Standard Enthalpies of Formation

This is most likely a silly question, but will we be given the standard enthalpies of formation on the midterm?
by gabbym
Sun Feb 10, 2019 6:19 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Problem #8.59 (Sixth Edition)
Replies: 3
Views: 27

Problem #8.59 (Sixth Edition)

Problem 8.59 says to use the data provided in Appendix 2A to calculate the standard reaction enthalpy for the reaction of pure nitric acid with hydrazine: 4 HNO3 + 5 N2H4 --> 7 N2 + 12 H2O I am trying to figure out why the standard enthalpy of formation for N2 is not used in calculating the answer. ...
by gabbym
Wed Jan 23, 2019 11:26 pm
Forum: Administrative Questions and Class Announcements
Topic: Discussion Section Test
Replies: 4
Views: 64

Re: Discussion Section Test

I think the only multiple choice questions will be in the form of true and false. For the discussion tests in 14A it was mostly a mixture of conceptual and calculation based questions. It won't be formatted like the post module assessments, but the questions will be similar.
by gabbym
Wed Jan 23, 2019 10:57 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Non-Equilibrium Conditions & The Reaction Quotient
Replies: 2
Views: 160

Re: Non-Equilibrium Conditions & The Reaction Quotient

I'm pretty sure you would end up getting 0.232 - 4.64x + 23.2x^2 because when you cross multiply you also have to multiply the 23.2 and the x^2 together.
by gabbym
Wed Jan 23, 2019 9:23 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 5% Rule
Replies: 3
Views: 17

5% Rule

Hey guys, I'm still a little confused on the 5% Rule. How do you know when to get rid of the x when you have something like x^2/0.20-x?
by gabbym
Wed Jan 23, 2019 9:22 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Acidity & Basicity Constants
Replies: 3
Views: 17

Acidity & Basicity Constants

Hey guys, do we have to memorize the acidity and basicity constants from the tables that were mentioned in the homework problems?
by gabbym
Wed Jan 23, 2019 9:21 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Chemical Eq Part #3 Post-Module Assessment
Replies: 1
Views: 29

Chemical Eq Part #3 Post-Module Assessment

15. At a certain temperature K = 4.0 for the esterification of ethanol and acetic acid: C2H5OH (aq) + CH3COOH (aq) ⇌ CH3COOC2H5 (aq) + H2O (l) If initially 2.0 moles of C2H5OH and 1.0 mole of CH3COOH are in a 1.0 L aqueous solution, what are the equilibrium concentrations of the organic molecules. C...
by gabbym
Wed Jan 23, 2019 9:19 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Chemical Eq Part #3 Post-Module Assessment
Replies: 1
Views: 30

Chemical Eq Part #3 Post-Module Assessment

16. 1.50 mol PCl5 is placed in a 500 ml reaction vessel and decomposes at 250°C to form PCl3 and Cl2. KC = 1.80, all substances are gases at 250°C. What is the composition of the equilibrium mixture? Can someone please work this question out for me and show me how you did it? I know how to do the IC...
by gabbym
Fri Jan 11, 2019 8:56 am
Forum: General Science Questions
Topic: Chem textbook
Replies: 3
Views: 76

Re: Chem textbook

It's much cheaper to buy the textbook used off the UCLA Free & For Sale page on Facebook or some people will be giving out the PDF for free on there as well :)
by gabbym
Fri Jan 11, 2019 8:55 am
Forum: General Science Questions
Topic: Lecture Powerpoints
Replies: 9
Views: 142

Re: Lecture Powerpoints

He doesn't post the lecture slides or Bruincast because he wants everyone to attend lecture as much as possible. If you miss a lecture all you can really do is ask a fellow student for the notes that you missed and take advantage of the other resources Lavelle provides.
by gabbym
Fri Jan 11, 2019 8:53 am
Forum: General Science Questions
Topic: Week 1 Homework
Replies: 5
Views: 82

Week 1 Homework

When is homework #1 due?
by gabbym
Sat Dec 08, 2018 7:08 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Ka and Kb
Replies: 2
Views: 35

Re: Ka and Kb

Thanks!
by gabbym
Sat Dec 08, 2018 7:05 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Ka and Kb
Replies: 2
Views: 35

Ka and Kb

Are we going to be asked to find Ka and Kb on the test?
by gabbym
Sat Dec 08, 2018 6:48 pm
Forum: Student Social/Study Group
Topic: Bronsted Bases
Replies: 2
Views: 75

Bronsted Bases

Hey guys, here is just a little tip my PLF taught me to help me remember what bronsted bases are. Just remember that "Bases get H's
by gabbym
Sat Dec 08, 2018 6:46 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VESPR Shapes
Replies: 3
Views: 58

VESPR Shapes

Hey guys, here is a handy video to help you memorize VESPR shapes before tomorrow!
https://www.youtube.com/watch?v=P8d4WoXDLYM
(Note the following correction: "Sn of 5 is really cool, it's more than just trigonal bipyramidal")
by gabbym
Sat Dec 08, 2018 6:42 pm
Forum: Administrative Questions and Class Announcements
Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
Replies: 118
Views: 4124

Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]

Thank you for taking the time to make this for us!
by gabbym
Sat Dec 01, 2018 8:40 pm
Forum: Student Social/Study Group
Topic: Final
Replies: 12
Views: 234

Re: Final

Just check the email Lavelle sent today :)
by gabbym
Sat Dec 01, 2018 8:37 pm
Forum: Biological Examples
Topic: Final Material
Replies: 2
Views: 55

Final Material

How much do we need to know about coordination compounds in regard to biological examples. Will there be questions regarding their biological importance on the test?
by gabbym
Sat Dec 01, 2018 8:35 pm
Forum: Administrative Questions and Class Announcements
Topic: Thank you to Professor Lavelle
Replies: 1
Views: 57

Thank you to Professor Lavelle

I would just like to thank Professor Lavelle for being so kind and understanding when I was extremely sick and unable to go to lecture and having a difficult time keeping up with my classes. I was pleasantly surprised at how willing he was to work something out with me, as other professors in the pa...
by gabbym
Sat Nov 24, 2018 9:40 pm
Forum: Administrative Questions and Class Announcements
Topic: Homework for week 9
Replies: 11
Views: 134

Re: Homework for week 9

I stapled mine separately, but it probably doesn't matter that much!
by gabbym
Sat Nov 24, 2018 9:38 pm
Forum: Student Social/Study Group
Topic: curve?
Replies: 20
Views: 557

Re: curve?

I was talking to a girl who took Chem 14A last spring and she said that Lavelle adds ten points at the end. I'm not sure if he adds ten points what you get on the final or to your total amount of points at the end though.
by gabbym
Sat Nov 24, 2018 9:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 9 Test
Replies: 6
Views: 122

Week 9 Test

Hey guys, I was unable to make it to my discussion the Wednesday before Thanksgiving, and I had a couple of questions regarding the upcoming test. I was wondering what kinds of questions were going to be asked regarding bond lengths and strengths. Is it just going to be mostly conceptual questions? ...
by gabbym
Wed Nov 14, 2018 2:36 pm
Forum: Student Social/Study Group
Topic: Chem Jokes (So Awful)
Replies: 1
Views: 88

Chem Jokes (So Awful)

"If Avogadro calls, tell him to leave his number." "OMG Did you hear that Oxygen and Magnesium are a couple?" "The name's bond, hydrogen bond." "That was sodium funny, I slapped my neon that one." "I don't trust atoms...I heard they make up everything.&qu...
by gabbym
Wed Nov 14, 2018 2:29 pm
Forum: Administrative Questions and Class Announcements
Topic: Lecture on 11/21
Replies: 1
Views: 77

Lecture on 11/21

Did Lavelle decide if there is going to be lecture on the Wednesday before Thanksgiving?
by gabbym
Sat Nov 10, 2018 8:45 pm
Forum: Student Social/Study Group
Topic: Last Friday's Lecture
Replies: 4
Views: 112

Re: Last Friday's Lecture

Ooh okay, thanks!
by gabbym
Sat Nov 10, 2018 8:33 pm
Forum: Student Social/Study Group
Topic: Last Friday's Lecture
Replies: 4
Views: 112

Last Friday's Lecture

In lecture last Friday, I think I heard Lavelle mention something about sapling learning? I've never heard him mention this before and I was wondering if anyone knew what he was talking about.
by gabbym
Tue Nov 06, 2018 5:42 pm
Forum: Student Social/Study Group
Topic: Test & Exam Dates
Replies: 4
Views: 93

Test & Exam Dates

When is the next text going to be?
by gabbym
Tue Nov 06, 2018 5:41 pm
Forum: Bond Lengths & Energies
Topic: Bond Lengths
Replies: 5
Views: 50

Bond Lengths

How can you determine if all the bond lengths are the same based off of a Lewis Structure?
by gabbym
Tue Nov 06, 2018 5:39 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm [ENDORSED]
Replies: 14
Views: 308

Midterm [ENDORSED]

Approximately how long will it take for the midterm to be graded?
by gabbym
Mon Oct 29, 2018 11:10 pm
Forum: Administrative Questions and Class Announcements
Topic: How to find my posts
Replies: 28
Views: 15558

Re: How to find my posts

Class Announcements is the place the look to see if Lavelle has posted something. If it is super important though, he will probably just mention it in lecture.
by gabbym
Mon Oct 29, 2018 4:48 pm
Forum: Student Social/Study Group
Topic: UA Review Sessions & Practice Midterms
Replies: 2
Views: 104

UA Review Sessions & Practice Midterms

Is there a list somewhere of the review sessions and practice midterms that are being offered by the UAs? Because I have class during the review sessions that Lavelle mentioned in class today :(
by gabbym
Sat Oct 27, 2018 10:15 am
Forum: Administrative Questions and Class Announcements
Topic: Modules & Assessments
Replies: 1
Views: 62

Modules & Assessments

I was wondering if the modules and assessments of the chem website were going to be updated since we've begun to cover new material. I find them really helpful :)
by gabbym
Tue Oct 23, 2018 7:32 pm
Forum: DeBroglie Equation
Topic: DeBroglie Equation Post Assessment
Replies: 3
Views: 85

DeBroglie Equation Post Assessment

At what velocity is an electron moving if it has a de Broglie wavelength of 7.0 × 10-11 m? Can someone help me with this problem?
by gabbym
Sat Oct 20, 2018 11:57 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals on the test
Replies: 6
Views: 102

Orbitals on the test

What do we need to know in regards to orbitals for the upcoming test? I'm pretty sure my TA told me that orbitals weren't going to be on the test, but then Lavelle went over them on Friday and said that they would be on the test.
by gabbym
Sat Oct 20, 2018 11:10 pm
Forum: DeBroglie Equation
Topic: DeBroglie Equation Post Assessment
Replies: 4
Views: 133

DeBroglie Equation Post Assessment

If an electron (mass 9.11 x 10-31 kg) has an associated wavelength of 7.28 x 10-9 m, what is its speed? Is your answer reasonable, why? Can someone help me with this problem? I think I am rearranging the equation wrong or something. I thought it should be v=h/m*wavelength, but I keep getting the wro...
by gabbym
Sat Oct 20, 2018 4:07 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg Indeterminacy Equation
Replies: 1
Views: 23

Heisenberg Indeterminacy Equation

In the sixth edition solution manual, the solution for problem 1.43 uses the equation (deltap) * (deltax) = 1/2*h. Is the same as the (deltap) * (deltax) = h/4(3.14) equation that we were given in class?
by gabbym
Wed Oct 17, 2018 4:59 pm
Forum: Photoelectric Effect
Topic: Atomic Spectra Post-Module Assessment
Replies: 1
Views: 35

Atomic Spectra Post-Module Assessment

In 1.0 s, a 60 W bulb emits 11 J of energy in the form of infrared radiation (heat) of wavelength 1850 nm. What is the energy per photon of light emitted? How many photons of infrared radiation does the lamp generate in 1.0 s? I was able to calculate the energy of photon per light emitted on my own,...
by gabbym
Wed Oct 17, 2018 12:24 pm
Forum: Properties of Light
Topic: Tip for frequency equation
Replies: 4
Views: 72

Tip for frequency equation

Hey guys! My PLF taught me a tip for remembering the frequency equation. If you ever get stuck, just ask yourself, "What's new?" "Speed over lambda!"
by gabbym
Wed Oct 17, 2018 12:21 pm
Forum: Properties of Light
Topic: Mnemonic for em spectrum
Replies: 2
Views: 55

Mnemonic for em spectrum

Hey guys! My PLF taught me a really cool mnemonic that I thought I would share with you. It goes like this: "Really Man I See U X Genius." R=radio waves, M=microwaves, I=Infrared, See=Visible Light, U=UV Light, and G=Gamma Rays.
I hope this helps!
by gabbym
Wed Oct 17, 2018 12:04 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect Post-Module Assessment
Replies: 2
Views: 26

Photoelectric Effect Post-Module Assessment

In a second experiment a shorter wavelength light source is used resulting in ejected electrons with a kinetic energy of 4.200 x 10-19 J. What is the energy of this incident light? What is the wavelength of this incident light? The first experiment gives you the work function 3.607 * 10^-19, with a ...
by gabbym
Wed Oct 17, 2018 11:38 am
Forum: Properties of Electrons
Topic: Calculate energy required to remove an electron
Replies: 6
Views: 1642

Re: Calculate energy required to remove an electron

This was so helpful, thank you!
by gabbym
Sat Oct 13, 2018 7:13 pm
Forum: Administrative Questions and Class Announcements
Topic: Writing in Pen
Replies: 13
Views: 250

Writing in Pen

Is writing in pen on the tests required? I am asking because it adds to my stress because I feel like everything is a mess. I realize that we are allowed to write out our work on scratch paper first and then transfer it over, but we are already pressed for time as it is. Can I just write in pencil a...
by gabbym
Tue Oct 09, 2018 8:52 pm
Forum: SI Units, Unit Conversions
Topic: Test and Exam Dates
Replies: 10
Views: 297

Re: Test and Exam Dates

Sweet
by gabbym
Tue Oct 09, 2018 8:44 pm
Forum: SI Units, Unit Conversions
Topic: Test and Exam Dates
Replies: 10
Views: 297

Test and Exam Dates

I wasn't sure where to post this, but there's no test or exam during the week of Thanksgiving, right? There's only going to be one during the following week?
by gabbym
Tue Oct 09, 2018 8:42 pm
Forum: SI Units, Unit Conversions
Topic: Units
Replies: 8
Views: 126

Units

If we don't carry every unit through our work, will we get marked down even if we have the correct units with the answer? For example if we didn't write down g/moles when converting grams to moles, will we get a point taken off?
by gabbym
Tue Oct 09, 2018 8:14 pm
Forum: Molarity, Solutions, Dilutions
Topic: Promblem G5, Part C, Seventh Edition
Replies: 2
Views: 102

Re: Promblem G5, Part C, Seventh Edition

That was so helpful! Thanks!
by gabbym
Tue Oct 09, 2018 6:09 pm
Forum: Molarity, Solutions, Dilutions
Topic: Promblem G5, Part C, Seventh Edition
Replies: 2
Views: 102

Promblem G5, Part C, Seventh Edition

I am trying to figure out why the solutions manual put 50.0 x 10^-3 divided by (105.99)(0.07967) for part c of problem G5. I was trying to set it up like the previous parts a and b, with the desired amount of moles on top divided by the molarity of sodium bicarbonate and the times the molar ratio. F...
by gabbym
Fri Oct 05, 2018 2:31 pm
Forum: SI Units, Unit Conversions
Topic: Unit Conversions [ENDORSED]
Replies: 3
Views: 71

Unit Conversions [ENDORSED]

What basic conversions do we need to know in preparation for the test next week? Besides millimeters to liters.
by gabbym
Wed Oct 03, 2018 1:58 pm
Forum: Balancing Chemical Reactions
Topic: Combustion Reactions.
Replies: 8
Views: 154

Combustion Reactions.

In example H1 from the Fundamentals H section of the seventh edition, you are asked to write and balance the chemical equation for the combustion of liquid hexane, C6H14, to gaseous carbon dioxide gas and gaseous water. I understand that the liquid hexane needs to react with something in order for i...
by gabbym
Wed Oct 03, 2018 1:46 pm
Forum: Balancing Chemical Reactions
Topic: Example H1, seventh edition.
Replies: 2
Views: 51

Example H1, seventh edition.

Example H1 under Fundamentals H in the seventh edition of the textbook asks you to write and balance the chemical equation for the combustion of liquid hexane, C6H14, to gaseous carbon dioxide gas and gaseous water. While I know of the top of my head that carbon dioxide is CO2, and that water would ...

Go to advanced search