Search found 50 matches

by Nahal 1F
Sat Mar 17, 2018 7:23 pm
Forum: Administrative Questions and Class Announcements
Topic: Answers to red panda practice exam?
Replies: 1
Views: 231

Answers to red panda practice exam?

CAN SOMEONE PLEASE POST THE ANSWERS TO THE RED PANDA PRACTICE EXAM?
by Nahal 1F
Sat Mar 17, 2018 1:06 pm
Forum: Administrative Questions and Class Announcements
Topic: Answers from review session?
Replies: 1
Views: 201

Answers from review session?

Can someone post pictures of all the answers from the final review session?
by Nahal 1F
Fri Mar 16, 2018 2:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Answer key to practice final?
Replies: 1
Views: 182

Answer key to practice final?

Is there an answer key to the practice final?
by Nahal 1F
Wed Mar 14, 2018 4:43 pm
Forum: Administrative Questions and Class Announcements
Topic: Practice Final?
Replies: 1
Views: 230

Practice Final?

Is there a practice final? If there is, can anyone link it to me please?
by Nahal 1F
Wed Mar 14, 2018 3:12 pm
Forum: General Rate Laws
Topic: How to draw a proposed structure for an activated complex?
Replies: 1
Views: 96

How to draw a proposed structure for an activated complex?

For example, how do you draw a structure for an activated complex such as:

rate=k[I]^2[Ar]
by Nahal 1F
Wed Mar 14, 2018 3:09 pm
Forum: Phase Changes & Related Calculations
Topic: 15.85
Replies: 2
Views: 219

15.85

Whats the difference between unimolecular, termolecular, and bimolecular?
by Nahal 1F
Wed Mar 07, 2018 1:02 pm
Forum: Administrative Questions and Class Announcements
Topic: practice final?
Replies: 4
Views: 327

practice final?

Is there a practice exam for the final?
by Nahal 1F
Wed Mar 07, 2018 1:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Formulas on test?
Replies: 3
Views: 186

Formulas on test?

Does this week's test include the 1st order and 2nd order formulas and the half-life formulas or do we have to memorize them?
by Nahal 1F
Tue Mar 06, 2018 7:27 pm
Forum: Administrative Questions and Class Announcements
Topic: Chapters on test?
Replies: 3
Views: 187

Chapters on test?

Which chapters does the test this week cover?
by Nahal 1F
Tue Mar 06, 2018 7:27 pm
Forum: Administrative Questions and Class Announcements
Topic: review session schedule?
Replies: 2
Views: 143

review session schedule?

Is the review session schedule for the final out yet?
by Nahal 1F
Wed Feb 14, 2018 10:49 am
Forum: Phase Changes & Related Calculations
Topic: Question about midterm [ENDORSED]
Replies: 1
Views: 144

Question about midterm [ENDORSED]

Which chapters will be on the midterm?
by Nahal 1F
Sun Jan 28, 2018 8:05 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Difference between systems? [ENDORSED]
Replies: 8
Views: 344

Difference between systems? [ENDORSED]

Can someone please explain the exact definitions of open, closed and isolated systems?
by Nahal 1F
Sun Jan 28, 2018 8:04 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Question from test?
Replies: 4
Views: 203

Question from test?

Is an ice pack making food cold an open system?
by Nahal 1F
Tue Jan 23, 2018 3:16 pm
Forum: Phase Changes & Related Calculations
Topic: Practice Test?
Replies: 2
Views: 167

Practice Test?

Is there a practice test for Test #1?
by Nahal 1F
Thu Jan 18, 2018 12:48 pm
Forum: Phase Changes & Related Calculations
Topic: HW question
Replies: 5
Views: 227

HW question

should we do the 14 questions just on chapter 8?
by Nahal 1F
Tue Jan 16, 2018 11:48 pm
Forum: Administrative Questions and Class Announcements
Topic: When is HW due?
Replies: 2
Views: 228

When is HW due?

Is HW due on Wednesday or during discussion?
by Nahal 1F
Fri Jan 12, 2018 11:16 am
Forum: Administrative Questions and Class Announcements
Topic: Times to post per week
Replies: 5
Views: 286

Times to post per week

We are required to post a minimum of 3 times per week on chemistry community, correct?
by Nahal 1F
Fri Jan 12, 2018 11:11 am
Forum: Administrative Questions and Class Announcements
Topic: Answer book
Replies: 2
Views: 155

Answer book

Does the answer book from Chem 14A apply to Chem 14B? Or is there a new one we have to get?
by Nahal 1F
Tue Jan 09, 2018 1:09 pm
Forum: Administrative Questions and Class Announcements
Topic: Course Reader?
Replies: 1
Views: 166

Course Reader?

Is there a course reader available for this quarter?
by Nahal 1F
Sat Dec 02, 2017 11:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Link to Review Session Schedule? [ENDORSED]
Replies: 3
Views: 238

Link to Review Session Schedule? [ENDORSED]

Can someone please give me the link to the review session schedules?
by Nahal 1F
Tue Nov 28, 2017 9:43 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Review Sessions [ENDORSED]
Replies: 1
Views: 174

Final Review Sessions [ENDORSED]

What's the schedule for the final review sessions?
by Nahal 1F
Mon Jul 24, 2017 8:29 pm
Forum: Administrative Questions and Class Announcements
Topic: Review Session
Replies: 1
Views: 184

Review Session

What time will the review session on monday be?
by Nahal 1F
Mon Jul 24, 2017 3:42 pm
Forum: Naming
Topic: Diaqaua
Replies: 9
Views: 449

Re: Diaqaua

It means there are two H2O molecules

Di=2
Aqua=H2O

So, Diaqua would be (H2O)2
by Nahal 1F
Mon Jul 24, 2017 3:31 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 11.7
Replies: 1
Views: 166

11.7

The following flasks show the dissociation of a diatomic molecule, X2, over time:

(Part c) Assuming that the initial pressure of X2 was 0.10 bar, calculate the value of K for the decomposition.

The answer for this is: [(12/17) x 0.1]^2 / (5/17) x 0.1 = 0.17

How do you get 12/17 and 5/17?
by Nahal 1F
Mon Jul 24, 2017 1:29 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: How do you write the MO configuration?
Replies: 1
Views: 196

How do you write the MO configuration?

I'm still confused on how to write the MO configuration for questions such as 4.53 in the textbook
by Nahal 1F
Sat Jul 22, 2017 5:19 pm
Forum: Hybridization
Topic: how do you find the hybridization [ENDORSED]
Replies: 2
Views: 281

how do you find the hybridization [ENDORSED]

how do you find the hybridization of molecules?
by Nahal 1F
Wed Jul 19, 2017 4:28 pm
Forum: Administrative Questions and Class Announcements
Topic: Question about Test 2
Replies: 1
Views: 192

Question about Test 2

Which chapters will test 2 cover?
by Nahal 1F
Wed Jul 19, 2017 4:17 pm
Forum: Ionic & Covalent Bonds
Topic: 3.61
Replies: 2
Views: 259

3.61

For hw #3.61,

a. I has 12 valence electrons
b. I has 10 valence electrons
c. I has 12 valence electrons

I thought an atom could only have 8 electrons around it?
by Nahal 1F
Tue Jul 18, 2017 7:51 pm
Forum: Formal Charge and Oxidation Numbers
Topic: #3.49
Replies: 2
Views: 247

#3.49

It says to determine the formal charge of each atom.

For part a. NO+, the answer book says:
N has a charge of 0
O has a charge of +1

How do you find the charges of each atom?
by Nahal 1F
Tue Jul 18, 2017 7:18 pm
Forum: Lewis Structures
Topic: Number of bonds?
Replies: 1
Views: 179

Number of bonds?

When drawing a Lewis Structure, how do you know if you have to use a single, double, or triple bond?
by Nahal 1F
Sun Jul 16, 2017 6:24 pm
Forum: Ionic & Covalent Bonds
Topic: Chemical formula?
Replies: 5
Views: 338

Chemical formula?

How do you find the chemical formula of compounds?

For example, chronium(III) and manganese(II)
by Nahal 1F
Sun Jul 16, 2017 6:19 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Unpaired electrons
Replies: 4
Views: 428

Unpaired electrons

I'm still a little confused on how to find the number of unpaired electrons. For example, how would you find the unpaired electrons for 2n^2+?
by Nahal 1F
Tue Jul 11, 2017 10:03 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: HW #2.51
Replies: 3
Views: 284

Re: HW #2.51

I think you wrote down the elements from problem 2.52. But either way you'd go about answering the question the same way. I just wrote down the electron configurations and then drew out the aufbau diagram with the arrows just to make it more visibly clear. For question 2.51 part a for example, I lo...
by Nahal 1F
Tue Jul 11, 2017 8:33 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Hw #2.25
Replies: 2
Views: 335

Re: Hw #2.25

4P orbitals: n=4 l=1 ml= -1,0,1 so that means the p orbital has 3 orbitals and each orbital can hold 2 electrons so for the 4P orbital it can have 6 electrons 3D n= 3 l=2 ml= -2, -1, 0, 1, 2 so 5 orbitals each holding 2 electron means a total of 10 electrons 1s n=1 l=0 ml=0 so 1 orbital only 2 elec...
by Nahal 1F
Tue Jul 11, 2017 8:32 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: HW #2.51
Replies: 3
Views: 284

HW #2.51

How do you find the number of unpaired electrons for the ground state configuration of:

a)Pb
b)IR
c)Y
d)Cd
by Nahal 1F
Tue Jul 11, 2017 7:20 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Hw #2.25
Replies: 2
Views: 335

Hw #2.25

How many electrons can occupy the (a)4-p orbitals (b)3d-orbitals (c)1s-orbital (d)4-f orbitals of an atom?

How do you find the amount of electrons for an orbital?
by Nahal 1F
Thu Jul 06, 2017 12:44 am
Forum: Student Social/Study Group
Topic: Self Test 1 Answers
Replies: 8
Views: 818

Re: Self Test 1 Answers

Chels Zh wrote:Hey guys, how did you get no.5, I got an extremely small number, I think I might have got some steps wrong.


This is what I did. Not sure if it's right though
by Nahal 1F
Wed Jul 05, 2017 11:23 pm
Forum: Empirical & Molecular Formulas
Topic: Self test 1 #5
Replies: 2
Views: 410

Self test 1 #5

6.40g of a compound was burned in air and produced 8.80g of CO2 and 7.20g of H2O. Find the Empirical formula of the compound

How do you find the moles of Oxygen when I know that the mass is 3.2? Do I just divide by 16?
by Nahal 1F
Wed Jul 05, 2017 5:09 pm
Forum: General Science Questions
Topic: Question about course reader
Replies: 1
Views: 424

Question about course reader

Is there a page in the course reader that has all the formulas and constants?
by Nahal 1F
Wed Jul 05, 2017 4:15 pm
Forum: DeBroglie Equation
Topic: self test 1: #3 part b
Replies: 3
Views: 302

Re: self test 1: #3 part b

Could you type the full question please, and by the way, where can I find the self-test? The first part was Find the uncertainty in the position of a marble of mass 1.5g given that it's speed is known to be within +/- 0.55m/s^-1. For this I got >/= 3.2 x 10^-32 And you can find the self test in the...
by Nahal 1F
Wed Jul 05, 2017 3:30 pm
Forum: DeBroglie Equation
Topic: self test 1: #3 part b
Replies: 3
Views: 302

self test 1: #3 part b

If the speed of the marble is 3.5m/s what is its wavelength?

What would you plug in for the p in the formula, lambda=h/p?
by Nahal 1F
Tue Jul 04, 2017 6:24 pm
Forum: Student Social/Study Group
Topic: Self Test 1 Answers
Replies: 8
Views: 818

Re: Self Test 1 Answers

Davalanya 1F wrote:Could you explain how you set up 1B? I think I'm overthinking the entire thing. Thanks!



You just multiply 250mL by .650 M and divide that by 2.00M. The M's will cancel out and leave you with about 81.3mL
by Nahal 1F
Tue Jul 04, 2017 6:05 pm
Forum: Limiting Reactant Calculations
Topic: Self test question #2 [ENDORSED]
Replies: 1
Views: 219

Self test question #2 [ENDORSED]

After you balance the equation and find the limiting reactant, what is the next step?
by Nahal 1F
Tue Jul 04, 2017 5:37 pm
Forum: Molarity, Solutions, Dilutions
Topic: Self Test:#1 part a
Replies: 1
Views: 167

Self Test:#1 part a

How many grams of NaOH do you need to prepare a 3.00 x 10^2 mL stock solution of 2.00 M NaOH?

Is there a certain formula you have to use or do you just use conversion?
by Nahal 1F
Mon Jul 03, 2017 10:08 pm
Forum: Student Social/Study Group
Topic: Exams/tests ?
Replies: 4
Views: 437

Re: Exams/tests ?

The test will most likely have about 5 questions with several parts to them (a,b,c,etc.) and will be calculation-based word problems.
by Nahal 1F
Mon Jul 03, 2017 10:04 pm
Forum: Administrative Questions and Class Announcements
Topic: Self Test 1
Replies: 1
Views: 234

Self Test 1

Is there an answer key to self test #1 in the course reader?
by Nahal 1F
Sun Jul 02, 2017 4:44 pm
Forum: SI Units, Unit Conversions
Topic: Test 1 [ENDORSED]
Replies: 3
Views: 528

Test 1 [ENDORSED]

Does the first test only cover the fundamentals and chapter 1? or does it also cover chapter 2?
by Nahal 1F
Fri Jun 30, 2017 9:46 pm
Forum: SI Units, Unit Conversions
Topic: Practice Tests?
Replies: 2
Views: 475

Practice Tests?

Are there any other practice tests for the test next week other than the ones in the course reader?
by Nahal 1F
Wed Jun 28, 2017 3:37 pm
Forum: Administrative Questions and Class Announcements
Topic: Summer Bruincast
Replies: 6
Views: 569

Re: Summer Bruincast

I dont think so, I checked on the bruincast website and it looks like theres only bruincasts fall-spring quarter.
by Nahal 1F
Mon Jun 26, 2017 4:34 pm
Forum: SI Units, Unit Conversions
Topic: Exercise E1 [ENDORSED]
Replies: 6
Views: 786

Exercise E1 [ENDORSED]

For Exercise E1: The field of nanotechnology offers some intriguing possibilities, such as the creation of fibers one atom wide. Suppose you were able to string together 1.00 mol Ag atoms each of radius 144pm, into one of these fibers by encapsulating them in carbon nanotubes. How long would the fib...

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