Search found 25 matches

by Anjum Farook 2O
Sun Mar 19, 2017 1:47 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 209
Views: 101158

Re: Saying Thank You to Dr. Lavelle

thank you for the time you've invested in ensuring we have access to countless resources that have helped us prepare for this class!
by Anjum Farook 2O
Sun Mar 05, 2017 8:40 pm
Forum: Student Social/Study Group
Topic: Book
Replies: 2
Views: 404

Re: Book

nope, i don't think so
by Anjum Farook 2O
Sun Mar 05, 2017 4:04 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1019122

Re: Post All Chemistry Jokes Here

i know we haven't covered hydrogenation yet but
by Anjum Farook 2O
Sun Mar 05, 2017 4:02 pm
Forum: General Science Questions
Topic: Lewis structure
Replies: 2
Views: 495

Re: Lewis structure

sulphur is the least electronegative
by Anjum Farook 2O
Tue Feb 28, 2017 2:40 pm
Forum: *Alkanes
Topic: Naming [ENDORSED]
Replies: 92
Views: 8329

Re: Naming [ENDORSED]

I believe you use dashes not just to separate numbers but also prefixes/suffixes. e.g. 3-ethyl-5-methyl-octane
by Anjum Farook 2O
Wed Feb 22, 2017 10:48 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 2 Winter 2017
Replies: 160
Views: 15319

Re: Quiz 2 Winter 2017

I was wondering the same thing ^ (sig figs in #6)
by Anjum Farook 2O
Sat Feb 11, 2017 10:27 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Units of Temperature in Entropy Change Expression [ENDORSED]
Replies: 1
Views: 270

Units of Temperature in Entropy Change Expression [ENDORSED]

When using the expression delta S = Cp ln (T2/T1), does it matter if we use Kelvin or Celsius for the values of T2 and T1?
by Anjum Farook 2O
Sat Feb 11, 2017 3:59 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Winter 2017
Replies: 87
Views: 14452

Re: Midterm Winter 2017

It said the same thing for me (plugin not working). Try downloading it by clicking on the "Part 1.mp4" file - do the same for all 3 files. I downloaded it and can watch it now
by Anjum Farook 2O
Sun Feb 05, 2017 10:31 pm
Forum: Phase Changes & Related Calculations
Topic: Random question
Replies: 3
Views: 503

Re: Random question

i think it depends on the specific phase changes/chemical changes you're comparing..
by Anjum Farook 2O
Sun Feb 05, 2017 10:30 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Quiz 1
Replies: 4
Views: 576

Re: Quiz 1

quizzes aren't curved but final grades are
by Anjum Farook 2O
Sun Feb 05, 2017 10:30 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1019122

Re: Post All Chemistry Jokes Here

What do you do with a sick chemist?

First you try and helium, then try and curium, but it that doesn’t work, you barium
by Anjum Farook 2O
Sat Jan 28, 2017 2:16 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Practice Quiz Answers
Replies: 8
Views: 728

Re: Practice Quiz Answers

Would anyone be interested in cross-checking answers in that case?
by Anjum Farook 2O
Sat Jan 28, 2017 2:15 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Molar Heat Capacity for Ideal Gas
Replies: 1
Views: 265

Molar Heat Capacity for Ideal Gas

I wasn't sure about how to solve #31 from chapter 8 so I checked out the solutions manual and realized we needed the molar heat capacity for the gas. Are we expected to know the molar heat capacity values for atoms/linear/non-linear molecules? Also, how does molar heat capacity at constant pressure ...
by Anjum Farook 2O
Wed Jan 18, 2017 12:14 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1019122

Re: Post All Chemistry Jokes Here

Did you hear about the man who got cooled to absolute zero?
He's 0K now.
by Anjum Farook 2O
Sat Nov 26, 2016 11:16 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Ch 11 #7c
Replies: 2
Views: 372

Re: Ch 11 #7c

I didn't understand how to answer this part of the question either. "11.7: The following flasks show the dissociation of a diatomic molecule, X2, over time. (a) Which flask represents the point in time at which the reaction has reached equilibrium? (b) What percentage of the X2 molecules have d...
by Anjum Farook 2O
Tue Nov 15, 2016 9:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Prep vs Actual Quiz 3
Replies: 1
Views: 439

Re: Quiz 3 Prep vs Actual Quiz 3

he said we don't need to know how to draw the structure in class
by Anjum Farook 2O
Tue Nov 15, 2016 9:26 pm
Forum: Naming
Topic: Long ligand names in formulas
Replies: 1
Views: 260

Re: Long ligand names in formulas

i think we just write (en). I believe it was written like that somewhere in the textbook
by Anjum Farook 2O
Tue Nov 15, 2016 9:24 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: What is the structure of dien?
Replies: 2
Views: 378

Re: What is the structure of dien?

the metal atom bonds to the three nitrogens in dien as they have lone pairs

it would probably be octahedral
by Anjum Farook 2O
Mon Nov 14, 2016 6:06 pm
Forum: Naming
Topic: Writing the formula of a coordination compound
Replies: 2
Views: 458

Re: Writing the formula of a coordination compound

Also, for alphabetical order - do we consider the chemical symbols or the actual/written names of the ligands?
by Anjum Farook 2O
Mon Nov 14, 2016 6:02 pm
Forum: Naming
Topic: Writing the formula of a coordination compound
Replies: 2
Views: 458

Writing the formula of a coordination compound

When writing down the formula of a coordination compound, do we consider whether a ligand is neutral/anionic as well as the alphabetical order or is only the alphabetical order taken into consideration? I read somewhere that you write neutral ligands first, followed by anionic ones.
by Anjum Farook 2O
Mon Nov 14, 2016 5:54 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium direction??
Replies: 1
Views: 227

Re: Equilibrium direction??

a general reaction is written in the form R --> P where R is the reactant and P is the product formed. When we say a reaction tends to the left, we mean it favors the formation of reactants (since reactants are on the left side of the equation). Similarly when we say a reaction tends to the right, w...
by Anjum Farook 2O
Wed Nov 09, 2016 2:27 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1019122

Re: Post All Chemistry Jokes Here

Did you hear about the man who got cooled to absolute zero? He's 0K now.
by Anjum Farook 2O
Mon Oct 31, 2016 9:41 pm
Forum: Lewis Structures
Topic: Fall 2012 Midterm Question 7b
Replies: 2
Views: 389

Re: Fall 2012 Midterm Question 7b

The structure with the three double bonded Os has a FC of 0 on each of the three oxygens and a formal charge of -1 on the fourth oxygen. This is where the molecule gets its overall charge from. In the structure you're suggesting, however, chlorine carries the -1 charge, which is less favorable/desir...
by Anjum Farook 2O
Thu Oct 27, 2016 1:25 am
Forum: Lewis Structures
Topic: Quiz 2 Prep Question #7
Replies: 2
Views: 383

Re: Quiz 2 Prep Question #7

It basically wants you to identify/recognize that the structure of XeO2F2 is an exception to the octet rule because Xe expands its octet/has more than eight electrons in it's valence shell in this structure. Neon, on the other hand, is a member of period 2, so even if it were to be a central atom, i...

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