Search found 19 matches

by Nikolina Walas-3J
Sat Mar 14, 2015 7:02 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Residual Entropy
Replies: 3
Views: 519

Re: Residual Entropy

Residual Entropy just really applies to the equation S= k b lnW in which W is the degeneracy of a molecule. You can find W by looking at the number of ways to arrange something. As in this case, BF 3 only has one way to arrange the F atoms while NO has resonance and can have a double or triple bond,...
by Nikolina Walas-3J
Sat Mar 14, 2015 6:56 pm
Forum: *Free Energy of Activation vs Activation Energy
Topic: Kinetically controlled
Replies: 1
Views: 1143

Kinetically controlled

So for problem 4.40 (m), in the organic book, the answer says that only graphs 2 and 4 are kinetically controlled. Doesn't kinetically controlled mean that # > r so wouldn't graph number 3 also qualify?
by Nikolina Walas-3J
Sat Mar 14, 2015 12:43 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Irrev Vs Reversible Assumption
Replies: 2
Views: 359

Irrev Vs Reversible Assumption

Is it safe to assume that most systems are reversible unless otherwise stated. Because I've seen examples where the formula : sys = - surr is applied without an explicit statement saying its reversible
by Nikolina Walas-3J
Fri Mar 13, 2015 9:52 pm
Forum: *Free Energy of Activation vs Activation Energy
Topic: How to tell if a reaction is thermo or kinetically favored
Replies: 2
Views: 490

How to tell if a reaction is thermo or kinetically favored

For question 35 in the OChem book, it says to draw and label the reaction profile for the reaction: CH3Br + OH- -> CH3OH + Br- . From the solution you can tell that # is much larger than

How can we tell which Delta G to make larger on the graph?
by Nikolina Walas-3J
Fri Mar 13, 2015 8:10 pm
Forum: *Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
Topic: When/How to distinguish IUPAC and Common
Replies: 2
Views: 1170

When/How to distinguish IUPAC and Common

I have a question about the naming system. I noticed a couple example where it asked for naming but did not specify IUPAC or common, For example number 6B on Final 2012. And it seems to follow IUPAC but included iso and neo. How do I know when to use these? Also when should we include prim, tert, qu...
by Nikolina Walas-3J
Sat Dec 13, 2014 5:11 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Br 2+
Replies: 7
Views: 2542

Re: Br 2+

I actually don't think the D orbital would affect the MO diagram because its a lower energy level, so the valence would only be 4s and 4p
by Nikolina Walas-3J
Fri Dec 12, 2014 1:53 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: L.U.M.O. & H.O.M.O.
Replies: 5
Views: 887

Re: L.U.M.O. & H.O.M.O.

would that mean that for the z>8 H.O.M.O would be the sigma* and LUMO would be sigma?
by Nikolina Walas-3J
Thu Dec 11, 2014 2:47 pm
Forum: Lewis Structures
Topic: FINAL EXAM 2013 Q4A
Replies: 2
Views: 438

Re: FINAL EXAM 2013 Q4A

For CNO- why isn't there a double bond between the C and N with lone pairs on the C and N, that way they both have formal charge of 0
by Nikolina Walas-3J
Thu Dec 11, 2014 2:37 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Br 2+
Replies: 7
Views: 2542

Re: Br 2+

how would you draw the MO diagram if there is a d shell filled?
by Nikolina Walas-3J
Thu Dec 11, 2014 2:26 pm
Forum: Ionic & Covalent Bonds
Topic: FINAL EXAM 2013 Q3C
Replies: 3
Views: 652

Re: FINAL EXAM 2013 Q3C

why wouldn't it be BeCl2 wouldn't the Be give up its two electrons for the two Cl and both would become ions?2
by Nikolina Walas-3J
Tue Nov 04, 2014 12:50 pm
Forum: Resonance Structures
Topic: O3 vs O2, why is there only one observed bond length?
Replies: 3
Views: 2864

Re: O3 vs O2, why is there only one observed bond length?

Because if O3 had two double bonds you would be missing two electrons from the overall molecule. Oxygen has 6 valence electrons (6X3 = 18 electrons) if you counted up the electrons in an O3 bond with two double bonds you only get 16 electrons, 8 from the four lone pairs and 8 from the two double bon...
by Nikolina Walas-3J
Mon Nov 03, 2014 6:09 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: video
Replies: 2
Views: 434

Re: video

Awesome! Thank you!
by Nikolina Walas-3J
Sun Nov 02, 2014 9:54 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Non polar vs. Polar molecule Video example
Replies: 2
Views: 818

Non polar vs. Polar molecule Video example

Here's a video offering up an example on how to determine whether a molecule is polar or non polar
by Nikolina Walas-3J
Sat Nov 01, 2014 9:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: video
Replies: 2
Views: 434

video

How do i post a video, if i made one explaining a lewis structure?
by Nikolina Walas-3J
Sat Nov 01, 2014 8:05 pm
Forum: Dipole Moments
Topic: Polar vs. Nonpolar bonds
Replies: 2
Views: 543

Polar vs. Nonpolar bonds

So I know that polar bonds are when there is a dipole moment, but what would exactly qualify as a non polar bond? Would the two elements have to have equal electronegativities so that there is no dipole moment? I'm just confused on when and how there wouldn't be a dipole moment?
by Nikolina Walas-3J
Thu Oct 09, 2014 6:08 pm
Forum: Significant Figures
Topic: Scientific Notation vs Decimal
Replies: 2
Views: 581

Scientific Notation vs Decimal

How do we know when to leave an answer as a decimal or change it into scientific notation? i.e .0006 or 6 X 10^-4

Go to advanced search