Search found 16 matches
Re: Priority
You don't need to name it cis or trans since one side have both atoms that are the same.
- Sun Mar 13, 2016 10:07 pm
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: chair conformation
- Replies: 3
- Views: 755
Re: chair conformation
No they are all the same no matter where you place them.
- Sun Mar 13, 2016 10:05 pm
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: E/Z Stability
- Replies: 2
- Views: 805
Re: E/Z Stability
E because there is less tension between the molecules.
- Mon Feb 29, 2016 12:25 am
- Forum: *Alkenes
- Topic: Naming alkenes
- Replies: 1
- Views: 499
Re: Naming alkenes
The number is usually in front indicating which carbon it is bonded to.
- Mon Feb 29, 2016 12:22 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2764752
Re: Chemistry Jokes
A neutron walks into a restaurant and orders a couple of cokes. As she is about to leave, she asks the waiter how much she owes. The waiter replies, "For you, No Charge!!!"
- Mon Feb 29, 2016 12:21 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2764752
Re: Chemistry Jokes
Don't trust atoms, they make up everything.
- Sun Feb 21, 2016 11:05 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: Psuedo-Thermodynamic Parameters
- Replies: 1
- Views: 435
Re: Psuedo-Thermodynamic Parameters
In the psuedo-thermodynamic parameters standard enthalpy is always positives when bonds are broken and negative when bonds are being formed.
- Sun Feb 21, 2016 10:59 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Homogeneous and Heterogeneous Catalysts
- Replies: 3
- Views: 977
Re: Homogeneous and Heterogeneous Catalysts
Heterogeneous reactants are reactants that are catalysts that are in different phases. A heterogeneous catalyst will appear in the reaction mechanism (as different phases), but it will not appear in the final overall chemical reaction.
- Sun Feb 21, 2016 10:48 pm
- Forum: *Electrophiles
- Topic: Identifying an Electrophile/Nucleophile
- Replies: 3
- Views: 686
Re: Identifying an Electrophile/Nucleophile
Nucleophiles are electron rich regions that have "excess electrons" which can be bonding regions or an atom with lone pairs. Bonds can be nulceophiles because there is an "excess of electron" there. I don't think bonds can be electrophiles since bonds involves electrons.
- Sun Feb 21, 2016 10:44 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: PseudoThermodynamics
- Replies: 2
- Views: 603
Re: PseudoThermodynamics
In Pseudo-Thermodynamics standard ethalpy (delta H) is always positive I believe.
- Sun Feb 14, 2016 10:40 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2764752
Re: Chemistry Jokes
Appropriate for Valentine's Day.
Do you have 11 protons? Cause your sodium fine
Do you have 11 protons? Cause your sodium fine
- Sun Feb 14, 2016 10:37 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2764752
Re: Chemistry Jokes
Enjoy!
- Sat Jan 23, 2016 11:48 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Problem 8.31
- Replies: 1
- Views: 542
Re: Problem 8.31
Example 8.6 should be able to answer your question. For constant volume you use the heat capacity of volume formula Cv,m which is (5/2)R and for constant pressure you use the heat capacity of pressure formula Cp,m which is (5/2)R+R.
- Sun Nov 01, 2015 10:32 pm
- Forum: Lewis Structures
- Topic: Lowest Formal Charge
- Replies: 2
- Views: 2432
Re: Lowest Formal Charge
The one with just one atom with a -3 charge. You want as many atoms with 0 charge as possible.
- Sun Oct 25, 2015 9:31 pm
- Forum: Lewis Structures
- Topic: Formal Charge
- Replies: 3
- Views: 603
Re: Formal Charge
Formal Charge of an atom tells you the gain or loss of electron(s) while forming a covalent bond. The formula for determining formal charge (F.C.) = V - (L+S/2). V represents the # of valence electrons of the element. L is the # of lone pairs of the element. and S is the # shared bonding pairs of el...
- Sun Oct 18, 2015 11:22 pm
- Forum: Ionic & Covalent Bonds
- Topic: Structures of Polyatomic Species
- Replies: 1
- Views: 751
Re: Structures of Polyatomic Species
For SO4 there are four oxygens each having a minus 1 charge and the sulfur itself having a plus 2 charge. Thus SO4 having a total net charge of -2. You can find out the charge for each of the elements by using the formal charge(FC) formula = V -(L+S/2). V being the valence electron, L being the lone...