Search found 25 matches
- Sat Mar 12, 2016 1:51 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Winter 2016 Final Exam Review and Information
- Replies: 25
- Views: 18473
Re: Winter 2016 Final Exam Review and Information
Will the formula sheet given to us in the final look exactly like the one we already have? If not how will it be different?
- Wed Mar 02, 2016 1:20 am
- Forum: *Alkanes
- Topic: Intermediates
- Replies: 1
- Views: 528
Intermediates
In the course reader on page 87-88 it goes over electrophilic addition reaction, my question is how to do you identify how many and what are the intermediates?
- Sat Feb 27, 2016 8:15 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3698006
Re: Chemistry Jokes
Q: What is the show cesium and iodine love watching together?
A: CSI
A: CSI
- Sun Feb 21, 2016 7:18 pm
- Forum: General Rate Laws
- Topic: Rate law
- Replies: 3
- Views: 903
Re: Rate law
thanks!!
- Mon Feb 15, 2016 8:24 pm
- Forum: General Rate Laws
- Topic: Rate law
- Replies: 3
- Views: 903
Rate law
For 2 N2O5->2 N2+O2 the rate law is k[N2O]. I thought you were suppose to square the rate law like 2HI->H2+I2 k[HI]2. Can someone explain when not to square it?
- Mon Feb 15, 2016 2:48 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3698006
Re: Chemistry Jokes
In a sports relay race, a chemical kinetics specialist runs slowly, and his group loses the race.
When the chemical kinetics specialist is asked why he ran slowly, his reply was “I always wanted to be the significant rate determining step”.
When the chemical kinetics specialist is asked why he ran slowly, his reply was “I always wanted to be the significant rate determining step”.
- Mon Feb 15, 2016 2:47 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: winter 2011 question 5a
- Replies: 3
- Views: 737
Re: winter 2011 question 5a
ah okay thanks!
- Wed Feb 10, 2016 2:39 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: winter 2011 question 5a
- Replies: 3
- Views: 737
winter 2011 question 5a
can someone explain to me why you multiply everything by 6 exceot c6h12o6?
- Wed Feb 10, 2016 1:23 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3698006
Re: Chemistry Jokes
A small piece of ice which lived in a test tube fell in love with a Bunsen burner. "Bunsen! my flame! I melt whenever I see you" said the ice. The Bunsen burner replied :"It's just a phase you're going through".
- Wed Feb 10, 2016 1:14 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: standard reaction enthalpy for formation. Q2 1st midterm
- Replies: 1
- Views: 478
standard reaction enthalpy for formation. Q2 1st midterm
Can someone explain to me how you get dela H is -704 kj mol? I though you just added up all the delta H's ?
- Sun Jan 31, 2016 8:37 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Gibbs free energy - Calculate delta s and h and direction
- Replies: 1
- Views: 818
Gibbs free energy - Calculate delta s and h and direction
How would you calculate this problem?
Calculate deltaH and deltaS for the following reaction and decide in which direction each of these factors will drive the reaction.
N2(g) + 3 H2(g) equilibr.gif (63 bytes) 2 NH3(g)
Calculate deltaH and deltaS for the following reaction and decide in which direction each of these factors will drive the reaction.
N2(g) + 3 H2(g) equilibr.gif (63 bytes) 2 NH3(g)
- Sat Jan 23, 2016 5:34 pm
- Forum: Phase Changes & Related Calculations
- Topic: Calculating w, q, and delta U
- Replies: 1
- Views: 1971
Calculating w, q, and delta U
This is question number 3 on the second practice test. if 2.00 mol of an ideal gas at 300 k and 3.00 atm expands isothermally & reversibly from 6.00 L to 18.00 L and has a final pressure of 1.20 atm, what is w, q, and delta U? Can someone explain to me how to calculate this and which formula you...
- Mon Jan 18, 2016 12:39 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3698006
Re: Chemistry Jokes
What did the scientists say when he saw 2 isotopes of Helium?
HeHe
This person went to the doctor concerned over a mole they had on their skin. The doctor asked what the mole looked like and the person responded "6.02x10^23".
HeHe
This person went to the doctor concerned over a mole they had on their skin. The doctor asked what the mole looked like and the person responded "6.02x10^23".
- Sat Jan 09, 2016 3:59 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: calculate delta H in a RXN
- Replies: 1
- Views: 539
calculate delta H in a RXN
When do you use the formula the sum of the product - the sum of the reaction? Because there is another formula/method that is the same just backwards (the sum of the reaction- the sum of the product).
- Sun Dec 06, 2015 1:14 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: shape when given a formula for a complex ion
- Replies: 1
- Views: 536
shape when given a formula for a complex ion
how do you figure out the shape from a formula?
ex: [Co(en)2(Br)2]
it is octahedral but why?
ex: [Co(en)2(Br)2]
it is octahedral but why?
- Fri Dec 04, 2015 8:42 pm
- Forum: Properties of Electrons
- Topic: Number of electrons in a subshell [ENDORSED]
- Replies: 1
- Views: 914
Number of electrons in a subshell [ENDORSED]
What does it mean "write the number of electrons that can have the following quantum numbers if the orbitals of that sub shell are filled"?
This is part of the question when given ex n=3 and l=2 I know why it would be 3d but why would the answer to my question^ be 10?
This is part of the question when given ex n=3 and l=2 I know why it would be 3d but why would the answer to my question^ be 10?
- Wed Nov 25, 2015 10:48 am
- Forum: Biological Examples
- Topic: Which direction would the reaction proceed if:
- Replies: 2
- Views: 840
Which direction would the reaction proceed if:
if the the two reactants are doubled and the product is quadrupled?
I know the answer is left to right. But why is that?
I know the answer is left to right. But why is that?
- Fri Nov 13, 2015 9:57 pm
- Forum: Naming
- Topic: Oxidation States in naming complex compounds
- Replies: 1
- Views: 431
Re: Oxidation States in naming complex compounds
oh is it (II) I think I understand now..but still not 100%
- Fri Nov 13, 2015 9:18 pm
- Forum: Naming
- Topic: Oxidation States in naming complex compounds
- Replies: 1
- Views: 431
Oxidation States in naming complex compounds
So I'm a bit confused on how to get from [ ]^x to (y) For example: [FeCl3(H2o)3]^- I wrote triaquatrichloridoferrate (*if you can check this for me YOU'RE AWESOME) but I am unsure on how to get the ( ) oxidation charge and vice versa when given the name and we have to write the formula... if that's ...
- Mon Nov 02, 2015 10:33 pm
- Forum: Hybridization
- Topic: unpaired electron occupies what type of Molecule orbital
- Replies: 3
- Views: 1327
Re: unpaired electron occupies what type of Molecule orbital
Yes, sorry my question was somewhat unclear! The question was in regard to that question. So for the most part I was correct then? Does it matter how you word it?
- Sun Nov 01, 2015 5:16 pm
- Forum: Hybridization
- Topic: unpaired electron occupies what type of Molecule orbital
- Replies: 3
- Views: 1327
unpaired electron occupies what type of Molecule orbital
So in NO there is one unpaired electron in the first row of anti-bonding. I'm not sure what the question is looking for? Is it just asking for "anti-bonding pi px"? or?
- Sun Nov 01, 2015 3:31 pm
- Forum: Hybridization
- Topic: Hybrid orbitals when given a long formula
- Replies: 3
- Views: 1060
Re: Hybrid orbitals when given a long formula
oh okay! Thank you! That helps, I was thinking it was asking for something else.
- Sun Nov 01, 2015 3:17 pm
- Forum: Hybridization
- Topic: Hybrid orbitals when given a long formula
- Replies: 3
- Views: 1060
Hybrid orbitals when given a long formula
When given a formula like CH3CHCHCN and the two lasts Cs are underlined and asked what hybrid orbitals are being used, how do you figure this out?
- Tue Oct 27, 2015 12:24 am
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Paramagnetic & Diamagnetic
- Replies: 1
- Views: 1069
Paramagnetic & Diamagnetic
How do we figure out if they are Paramagnetic & Diamagnetic? I'm working on question 6&7 from the first quiz. The elements given are OF+, NO+, S2, and ect. Can i get an explanation of at least one?
- Sun Oct 25, 2015 7:45 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Oxidation
- Replies: 2
- Views: 597
Oxidation
how do we figure out what an oxidation number is when given a formula?