Search found 29 matches

by CenCen
Sun Mar 06, 2016 10:10 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 788453

Re: Chemistry Jokes

take a look at this one haha!
by CenCen
Sun Feb 28, 2016 5:23 pm
Forum: *Cycloalkenes
Topic: Question 1.21 a
Replies: 1
Views: 317

Question 1.21 a

would it be wrong to name this alkene 5-methyl-1,3-cyclopentadiene instead of 5-methylcyclopenta-1,3-diene
by CenCen
Sat Feb 27, 2016 12:30 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 788453

Re: Chemistry Jokes

"Mommaaaaaaa! OOOooooOOO!"
by CenCen
Tue Feb 23, 2016 1:07 am
Forum: Balancing Redox Reactions
Topic: Redox Reactions
Replies: 1
Views: 287

Redox Reactions

If the question for a redox reaction asks you to name which is the reducing agent and which is the oxidizing agent is that different from when another question asks which is being reduced and which is being oxidized?
Thanks. :)
by CenCen
Sun Feb 21, 2016 9:15 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 788453

Re: Chemistry Jokes

happy Sunday all :)
by CenCen
Tue Feb 16, 2016 7:31 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Catalyst
Replies: 1
Views: 269

Catalyst

What is a catalyst? How does it function?
by CenCen
Mon Feb 15, 2016 4:57 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 788453

Re: Chemistry Jokes

hehe...
by CenCen
Mon Feb 08, 2016 5:37 pm
Forum: Phase Changes & Related Calculations
Topic: heat
Replies: 1
Views: 232

heat

When solving for a problem that involves using the relation of qsurr=-qsys does it matter which side we place the negative sign? why? Thanks.
by CenCen
Fri Jan 29, 2016 8:00 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 788453

Re: Chemistry Jokes

here's another for you all. :)
by CenCen
Mon Jan 25, 2016 11:32 am
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Extensive V. Intensive
Replies: 2
Views: 393

Extensive V. Intensive

what's the difference between extensive and intensive properties and what are some examples?
thanks. :)
by CenCen
Fri Jan 22, 2016 7:23 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 788453

Re: Chemistry Jokes

i was thinking about this a few days ago and found someone had created this! :)
by CenCen
Tue Jan 12, 2016 9:18 pm
Forum: Phase Changes & Related Calculations
Topic: Chem Joke
Replies: 1
Views: 260

Chem Joke

where can we post the chem jokes?
by CenCen
Mon Dec 07, 2015 8:10 am
Forum: Properties of Light
Topic: Final score
Replies: 3
Views: 773

Re: Final score

Yeah I know that. But I mean when will we know the score? Or do we have to wait until that day to see what we got? That's an anxiety builder haha!
by CenCen
Sun Dec 06, 2015 11:25 pm
Forum: Properties of Light
Topic: Final score
Replies: 3
Views: 773

Final score

How soon will we know our score for the final?
by CenCen
Sat Dec 05, 2015 10:46 pm
Forum: *Titrations & Titration Calculations
Topic: distinguishing with working on different titrations
Replies: 1
Views: 257

distinguishing with working on different titrations

How can you tell whether you're working on a titration problem with both strong acid and base or a strong acid weak base or strong base weak acid?
For the strong acid strong base, how do you know which one is your titrant. does anyone have any helpful videos?
by CenCen
Sat Dec 05, 2015 6:32 pm
Forum: *Titrations & Titration Calculations
Topic: Acids and bases
Replies: 1
Views: 232

Acids and bases

Is CH3COOH a weak acid? How can you tell?
by CenCen
Sat Nov 28, 2015 3:00 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Fundamental E11
Replies: 2
Views: 1028

Fundamental E11

The nuclear power industry extracts 6 Li but not 7 Li from natural samples of lithium. As a result, the molar mass of commercial samples of lithium is increasing. The current abundances of the two isotopes are 7.42% and 92.58%, respectively, and the masses of their atoms are 9.988*10^-24 and 1.165*1...
by CenCen
Sat Nov 28, 2015 11:58 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Fundamentals E
Replies: 3
Views: 949

Re: Fundamentals E

So the diagram was necessary for this question? could I still solve this if the diagram were not there? And how?
by CenCen
Sat Nov 28, 2015 11:37 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Fundamentals E
Replies: 3
Views: 949

Fundamentals E

Fundamentals E3: In a nanotechnology lab you might have the capability to manipulate individual atoms. The atoms on the left are gallium atoms (molar mass 70 g/mol), those on the right are atoms of astatine (molar mass 210 g/mol). How many astatine atoms would have to be added to the pan on the righ...
by CenCen
Tue Nov 24, 2015 6:37 pm
Forum: Naming
Topic: Naming this compound
Replies: 2
Views: 552

Naming this compound

How would you name the following compound:

[Co(NH3)5Cl]Cl2

Can you explain the process of finding the oxidation number?

I named it: Pentaamminechloro cobalt (III) dichloride
by CenCen
Mon Nov 16, 2015 7:24 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Determining Coordination number
Replies: 1
Views: 233

Determining Coordination number

how can i determine the coordination number of a compound?
by CenCen
Mon Nov 16, 2015 12:42 pm
Forum: Naming
Topic: Determining Oxidation Numbers
Replies: 3
Views: 444

Re: Determining Oxidation Numbers

So the oxidation number is the number we would put in parentheses like for example: tetracyanonickelate (II) ?

What would be the coordination number?
by CenCen
Sun Nov 15, 2015 8:38 pm
Forum: Naming
Topic: Name of complex compound
Replies: 1
Views: 287

Name of complex compound

in fall 2014 quiz 3 preparation question 2 it says to name Na[Co(NH3)3Cl3]

in the solution it says that for Cobalt it's Colbaltate. I just want to know why its not just cobalt.

the solution is: sodium triamminetrichlorocobaltate(II)
by CenCen
Sat Nov 14, 2015 12:07 am
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR and Polarity
Replies: 2
Views: 301

Re: VSEPR and Polarity

I think that knowing the shape a molecule takes and how it looks helps visually determine whether the molecule is polar or nonpolar unlike the lewis structure which shows the basic design of what atom is bonding where and how many lone pairs are present. The VSEPR model helps you actually see a bett...
by CenCen
Sat Nov 14, 2015 12:01 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining Molecular shape
Replies: 4
Views: 421

Re: Determining Molecular shape

It helps understanding why certain molecules take a shape. But something i think of when determining their shape is considering the bonds and lone pairs in relevance to the central atom. I consider the regions of density and go from there. Its a simple process ive noticed. As you progress through re...
by CenCen
Mon Oct 26, 2015 2:07 pm
Forum: Photoelectric Effect
Topic: Creating Lewis structure.
Replies: 1
Views: 347

Creating Lewis structure.

How can we distinguish whether we should use double bonds or add a pair of electrons when we start building our Lewis structure?
by CenCen
Sat Oct 17, 2015 5:12 pm
Forum: Properties of Electrons
Topic: Valence electrons
Replies: 1
Views: 331

Valence electrons

What's the deal with transition metals?
How would I go about finding their valence electrons? Would I do the same as I do to any other element outside of transitions?
by CenCen
Sat Oct 10, 2015 8:58 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactants & Limiting Reagents [ENDORSED]
Replies: 7
Views: 1265

Limiting Reactants & Limiting Reagents [ENDORSED]

so, i was really confused in after having gone to my lecture and discussion. i just want to know if there's a difference between the two. If so, what is it?
by CenCen
Sat Oct 10, 2015 8:53 pm
Forum: Significant Figures
Topic: All students read this sig fig post [ENDORSED]
Replies: 90
Views: 7740

Re: All students read this sig fig post [ENDORSED]

So I've been wondering, what's so important about sigfigs? why does it matter how many numbers we leave after the decimal place?

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