Search found 21 matches
- Sun Mar 19, 2017 6:27 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Intermediates in pre equilibrium
- Replies: 8
- Views: 2715
Re: Intermediates in pre equilibrium
usually there is one intermediate
- Sun Mar 19, 2017 6:27 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Intermediates in pre equilibrium
- Replies: 8
- Views: 2715
Re: Intermediates in pre equilibrium
there can be 2 transition states in an electorphillic reaction
- Mon Mar 06, 2017 11:18 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 Winter 2017
- Replies: 183
- Views: 29032
Re: Quiz 3 Winter 2017
how would you draw out 2-butene or anything with a number in front of it ???
- Mon Mar 06, 2017 10:47 pm
- Forum: *Cycloalkanes
- Topic: Cyclo-
- Replies: 7
- Views: 2231
Re: Cyclo-
how do you know which carbon to number first?
i know it has to do with the lowest substituents
i know it has to do with the lowest substituents
- Mon Feb 20, 2017 7:59 pm
- Forum: Second Order Reactions
- Topic: homework problem #35
- Replies: 4
- Views: 1074
Re: homework problem #35
for question 39 i understand using the second order integrated rate law but what does the question mean when it asks for the rate law expressed in terms of the loss of A??
- Sun Feb 05, 2017 8:00 pm
- Forum: Balancing Redox Reactions
- Topic: Oxidation and Reduction
- Replies: 3
- Views: 757
Re: Oxidation and Reduction
wait nevermind I got it haha
- Sun Feb 05, 2017 7:50 pm
- Forum: Balancing Redox Reactions
- Topic: Oxidation and Reduction
- Replies: 3
- Views: 757
Re: Oxidation and Reduction
for that same problem, i understand that you have to balance the hydorgen and electrons but why is it 2H+ when there is only 5 on the reactant side and 4 on the product side?
- Mon Jan 30, 2017 10:32 pm
- Forum: Calculating Work of Expansion
- Topic: Work of Expansion and Compression
- Replies: 4
- Views: 964
Re: Work of Expansion and Compression
in a bomb calorimeter is it true that
Qsystem =-Qcalorimeter
Qsystem =-Qcalorimeter
- Mon Jan 30, 2017 5:32 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Spontaneity
- Replies: 4
- Views: 1035
Re: Spontaneity
when do you know if work is being done on the system or by the system?
- Thu Jan 19, 2017 8:32 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Reaction Enthalpies HW Q49
- Replies: 1
- Views: 535
Reaction Enthalpies HW Q49
The question asks for the internal energy for the reaction of 1.00 mol. I understand that you use the internal energy equation. But how do you know if the reaction is in constant pressure or not. How do you know for which questions you can use qp or just q.?
- Fri Jan 13, 2017 5:26 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3004306
Re: Post All Chemistry Jokes Here
Superman is a man. Batman is a man. Spiderman is a man. So why is Ironman a woman?
A: Because she is a Female.
A: Because she is a Female.
- Tue Nov 29, 2016 9:28 pm
- Forum: Identifying Acidic & Basic Salts
- Topic: Identifying a salt
- Replies: 4
- Views: 1243
Re: Identifying a salt
so, how would you know if a salt is an acid or base? like: NH4Cl
- Tue Nov 29, 2016 9:00 pm
- Forum: Identifying Acidic & Basic Salts
- Topic: Salt acidic or basic?
- Replies: 3
- Views: 2441
Re: Salt acidic or basic?
what is your only given the salt and it asks if its an acid or base without the equation : for instance, NH4Br
- Tue Nov 29, 2016 8:55 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Homework Help 12.65
- Replies: 4
- Views: 2261
Re: Homework Help 12.65
How can a pH be less than 7 but be basic??and vice versa ...doesn't make sense??
- Sat Nov 19, 2016 11:45 am
- Forum: Lewis Acids & Bases
- Topic: Homework 12.109- hydronium and hydroxide ions
- Replies: 2
- Views: 675
Re: Homework 12.109- hydronium and hydroxide ions
why is there 3 different ways to find ph? how do you which to use?(they were discussed in lecture on Friday)
- Sun Nov 06, 2016 3:47 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Bond Order?
- Replies: 5
- Views: 1061
Re: Bond Order?
quick question: How do you know what you can write the sigma antibonding before the sigma pz state in s molecular orbital theory diagram thanks lol
- Sun Nov 06, 2016 3:35 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Molecular Orbital Theory
- Replies: 4
- Views: 839
Re: Molecular Orbital Theory
In molecular orbital theory, bond order is also defined as the difference, divided by two, between the number of bonding and antibonding electrons; this often, but not always, yields the same result. Bond order is also an index of bond strength, and it is used extensively in valence bond theory.
- Thu Oct 20, 2016 7:08 pm
- Forum: Sigma & Pi Bonds
- Topic: sigma and pi [ENDORSED]
- Replies: 1
- Views: 1061
sigma and pi [ENDORSED]
How do you calculate the valence electron configuration using sigma and pi
- Fri Oct 14, 2016 4:39 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3004306
Re: Post All Chemistry Jokes Here
What did one ion say to the other?
I've got my ion you.
I've got my ion you.
- Fri Oct 07, 2016 1:16 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Orbital Nodes
- Replies: 1
- Views: 476
Re: Orbital Nodes
There are four nodes total (5-1=4) and there are two angular nodes (d orbital has a quantum number ℓ=2) on the xz and zy planes. This means there there must be two radial nodes.
- Fri Sep 30, 2016 12:25 pm
- Forum: General Science Questions
- Topic: Photoelectric effect
- Replies: 1
- Views: 722
Photoelectric effect
Can someone please explain the photoelectric effect? I understand that when the ultraviolet radiation source hits the metal with enough intensity the electrons jump off. - the shorter the wave=higher frequency - further, increasing intensity= increasing photons The real question is if the threshold ...