Search found 22 matches

by Hung_Sabrina_3N
Fri Mar 17, 2017 5:50 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 2013 midterm q4
Replies: 1
Views: 247

Re: 2013 midterm q4

n= 4 because you must determine the oxidation numbers of each molecule in the reaction. 2 Fe has a oxidation number of 0, 2 H2O has an overall charge of 0 (2H=1+, O=2-), and O2 is also 0. Fe(OH)2 has an overall charge of 0 but the 2 OH groups have a 1- charge and so Fe must be 2+. The oxidation stat...
by Hung_Sabrina_3N
Fri Mar 17, 2017 5:38 pm
Forum: *Cycloalkenes
Topic: 2013 FINAL Q6A
Replies: 4
Views: 631

2013 FINAL Q6A

Why is the compound 1,5,5,6-tetramethylcyclohex-1-ene not named 2,3,4,4-tetramethylcyclohex-1-ene? Wouldn't the overall numbering of the second one be lower than the first except for the the first substituent?
by Hung_Sabrina_3N
Tue Mar 14, 2017 10:41 am
Forum: *Cycloalkanes
Topic: Naming the Substituent on the First Carbon
Replies: 1
Views: 445

Re: Naming the Substituent on the First Carbon

Its not optional because in this case you have two substituents and by not labeling it with a 1, it is ambiguous where the ethyl is located.
by Hung_Sabrina_3N
Tue Mar 14, 2017 10:39 am
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Difference Between torsional strain, steric strain, and bond angle strain
Replies: 2
Views: 243

Re: Difference Between torsional strain, steric strain, and bond angle strain

A torsional strain is the repulsion caused by the electrons in between different groups when they pass by each other. A steric strain is caused by the electrons in between different groups. Steric strain cannot be lessened by rotating the molecule around a bond. An angle strain is caused when the ac...
by Hung_Sabrina_3N
Tue Mar 07, 2017 10:08 pm
Forum: *Nucleophiles
Topic: Nucleophilic Strength Guidelines
Replies: 1
Views: 414

Re: Nucleophilic Strength Guidelines

If a nucleophile has a negative charge not a partial negative charge, the more negative the charge is, the stronger the nucleophile. After will come the nucleophiles with partial negative charges due to difference in electronegativity, last will be nucleophiles with the lone pairs or double bonds pr...
by Hung_Sabrina_3N
Tue Mar 07, 2017 10:05 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Calculating Activation Energy
Replies: 1
Views: 316

Re: Calculating Activation Energy

If its not given, you can easily solve for it by taking the ln of the Arrhenius equation which will give you ln k= -Ea/RT + lnA which follows y=mx+b so your slope would just be -Ea/R if the x-axis is 1/T.
by Hung_Sabrina_3N
Tue Feb 28, 2017 11:28 am
Forum: *Electrophiles
Topic: electrophiles and nucleophiles
Replies: 2
Views: 245

Re: electrophiles and nucleophiles

Electrophiles are missing electrons so they are attracted to positive charges while ucleophiles more negative and have more electrons so they will have negative charges. You can remember that bases are nucleophiles and all acids are electrophiles.
by Hung_Sabrina_3N
Sun Feb 19, 2017 8:46 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 901034

Re: Post All Chemistry Jokes Here

Q: What did the chemical agent say?
A: My name is Bond, Ionic Bond. Taken, not shared
by Hung_Sabrina_3N
Sun Feb 19, 2017 8:45 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 901034

Re: Post All Chemistry Jokes Here

Q: What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
A: A ferrous wheel:
Fe - Fe
/ \
Fe Fe
\ /
Fe - Fe
by Hung_Sabrina_3N
Mon Feb 06, 2017 5:09 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Inert Conductor in cell diagrams
Replies: 1
Views: 265

Re: Inert Conductor in cell diagrams

You will need an inert conductor when the solution is comprised of only ions and no solid metals. For example, Zn(s) + Cu2+ → Zn2+ + Cu(s) does not need an inert conductor because each side of the electrode solution has a metal, but if either the reactants or the product's had two aqueous compounds ...
by Hung_Sabrina_3N
Fri Feb 03, 2017 9:46 am
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: 14.23
Replies: 2
Views: 398

Re: 14.23

For calculating for the standard potential energy it doesn't depend on the number of moles because its an intensive property
by Hung_Sabrina_3N
Wed Jan 25, 2017 11:05 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 901034

Re: Post All Chemistry Jokes Here

Q: What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
A: A ferrous wheel:
by Hung_Sabrina_3N
Sat Jan 21, 2017 12:45 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 901034

Re: Post All Chemistry Jokes Here

Q: Why did the noble gas cry?
A: Because all his friends Argon
by Hung_Sabrina_3N
Wed Jan 11, 2017 8:44 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 901034

Re: Post All Chemistry Jokes Here

How many moles are in a guacamole? Avocado's number.
by Hung_Sabrina_3N
Mon Nov 28, 2016 11:34 am
Forum: Conjugate Acids & Bases
Topic: is h3o related to oh-
Replies: 2
Views: 1635

Re: is h3o related to oh-

H3O+ and OH- are also both related acid base reactions. A base will form OH- while an acid will form H3O+. Both reactions for acids and bases will start out with either a base or acid and H2O. The H3O+ and OH- is formed as a product from the H2O in both cases.
by Hung_Sabrina_3N
Mon Nov 28, 2016 11:26 am
Forum: Conjugate Acids & Bases
Topic: Dissociation
Replies: 1
Views: 297

Re: Dissociation

CH3COOH + H2O -> CH3COO- + H3O+ Is the equation for this dissociation. The Ka value will either be given or you have to find it. You can find the amount of the product that is dissociated using the Ka value that would be given in this case it is 1.8× 10–5 M. You will use [CH3COO-][H3O+]/[CH3COOH]=Ka...
by Hung_Sabrina_3N
Sun Nov 13, 2016 10:31 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 3
Views: 337

Re: Ligands

A ligand is the molecule that will donate a lone pair to the central metal ion in a coordinate compound.
by Hung_Sabrina_3N
Mon Nov 07, 2016 4:16 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 3
Views: 337

Re: Ligands

Denticity is basically number bonds they can form with the metal ion. A ligand will be bidentate if it can make two bonds with the metal ion and tridentate if it can form three. You can tell a ligand will be mono-, bi-, or tri- dentate by looking at the number of atoms that can donate an electron pa...
by Hung_Sabrina_3N
Sun Oct 30, 2016 2:53 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 901034

Re: Post All Chemistry Jokes Here

What do you call Iron blowing in the wind?
Febreeze
by Hung_Sabrina_3N
Mon Oct 24, 2016 1:07 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 901034

Re: Post All Chemistry Jokes Here

"Tell me a potassium joke!"
"K"
by Hung_Sabrina_3N
Tue Oct 18, 2016 12:02 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 901034

Re: Post All Chemistry Jokes Here

*When you dilute a solution*
Oh I'm sorry, did I break your concentration?
by Hung_Sabrina_3N
Fri Sep 30, 2016 3:19 pm
Forum: Photoelectric Effect
Topic: Minor Rounding Detail Question
Replies: 4
Views: 494

Re: Minor Rounding Detail Question

I would use 3.00 x 10^8 because the value of the speed of light is 2.99792 x 10^8. Therefore, I would round up to 3.00 x 10^8.

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