Search found 25 matches

by Mariah Tumbaga 1e
Sat Mar 12, 2016 1:51 pm
Forum: Administrative Questions and Class Announcements
Topic: Winter 2016 Final Exam Review and Information
Replies: 25
Views: 16841

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?
by Mariah Tumbaga 1e
Wed Mar 02, 2016 1:20 am
Forum: *Alkanes
Topic: Intermediates
Replies: 1
Views: 341

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?
by Mariah Tumbaga 1e
Sat Feb 27, 2016 8:15 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1360251

Re: Chemistry Jokes

Q: What is the show cesium and iodine love watching together?
A: CSI
by Mariah Tumbaga 1e
Sun Feb 21, 2016 7:18 pm
Forum: General Rate Laws
Topic: Rate law
Replies: 3
Views: 628

Re: Rate law

thanks!!
by Mariah Tumbaga 1e
Mon Feb 15, 2016 8:24 pm
Forum: General Rate Laws
Topic: Rate law
Replies: 3
Views: 628

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?
by Mariah Tumbaga 1e
Mon Feb 15, 2016 2:48 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1360251

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”.
by Mariah Tumbaga 1e
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: 447

winter 2011 question 5a

can someone explain to me why you multiply everything by 6 exceot c6h12o6?
by Mariah Tumbaga 1e
Wed Feb 10, 2016 1:23 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1360251

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".
by Mariah Tumbaga 1e
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: 266

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 ?
by Mariah Tumbaga 1e
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: 563

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)
by Mariah Tumbaga 1e
Sat Jan 23, 2016 5:34 pm
Forum: Phase Changes & Related Calculations
Topic: Calculating w, q, and delta U
Replies: 1
Views: 1300

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...
by Mariah Tumbaga 1e
Mon Jan 18, 2016 12:39 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1360251

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".
by Mariah Tumbaga 1e
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: 280

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).
by Mariah Tumbaga 1e
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: 343

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?
by Mariah Tumbaga 1e
Fri Dec 04, 2015 8:42 pm
Forum: Properties of Electrons
Topic: Number of electrons in a subshell [ENDORSED]
Replies: 1
Views: 653

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?
by Mariah Tumbaga 1e
Wed Nov 25, 2015 10:48 am
Forum: Biological Examples
Topic: Which direction would the reaction proceed if:
Replies: 2
Views: 541

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?
by Mariah Tumbaga 1e
Fri Nov 13, 2015 9:57 pm
Forum: Naming
Topic: Oxidation States in naming complex compounds
Replies: 1
Views: 222

Re: Oxidation States in naming complex compounds

oh is it (II) I think I understand now..but still not 100%
by Mariah Tumbaga 1e
Fri Nov 13, 2015 9:18 pm
Forum: Naming
Topic: Oxidation States in naming complex compounds
Replies: 1
Views: 222

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 ...
by Mariah Tumbaga 1e
Mon Nov 02, 2015 10:33 pm
Forum: Hybridization
Topic: unpaired electron occupies what type of Molecule orbital
Replies: 3
Views: 750

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?
by Mariah Tumbaga 1e
Sun Nov 01, 2015 5:16 pm
Forum: Hybridization
Topic: unpaired electron occupies what type of Molecule orbital
Replies: 3
Views: 750

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?
by Mariah Tumbaga 1e
Sun Nov 01, 2015 3:31 pm
Forum: Hybridization
Topic: Hybrid orbitals when given a long formula
Replies: 3
Views: 681

Re: Hybrid orbitals when given a long formula

oh okay! Thank you! That helps, I was thinking it was asking for something else.
by Mariah Tumbaga 1e
Sun Nov 01, 2015 3:17 pm
Forum: Hybridization
Topic: Hybrid orbitals when given a long formula
Replies: 3
Views: 681

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?
by Mariah Tumbaga 1e
Tue Oct 27, 2015 12:24 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Paramagnetic & Diamagnetic
Replies: 1
Views: 465

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?
by Mariah Tumbaga 1e
Sun Oct 25, 2015 7:45 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Oxidation
Replies: 2
Views: 335

Oxidation

how do we figure out what an oxidation number is when given a formula?

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