Search found 21 matches

by Kahlo Baniadam 3F
Mon Mar 07, 2016 5:06 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Conformation of the 4 carbons that form the "seat" of chair
Replies: 1
Views: 289

Re: Conformation of the 4 carbons that form the "seat" of ch

the carbons are in a plane but the hydrogens are staggered, giving no steric strain
by Kahlo Baniadam 3F
Mon Feb 29, 2016 4:29 pm
Forum: *Ketones
Topic: 'R' Groups
Replies: 2
Views: 833

Re: 'R' Groups

'R' just refers to a Carbon chain or group like CH3 or CH2
by Kahlo Baniadam 3F
Wed Feb 24, 2016 4:45 pm
Forum: *Nucleophiles
Topic: fluorine
Replies: 1
Views: 357

Re: fluorine

Fluorine wants to gain an 8th electron to have a full octet and become F-, so it is electrophilic
by Kahlo Baniadam 3F
Thu Feb 18, 2016 4:04 pm
Forum: Second Order Reactions
Topic: Half life of second order reactions
Replies: 2
Views: 503

Half life of second order reactions

In first order reactions, every half life decreases the concentration of a reactant by half. Is this the same for second order even though it factors in [A]o?
by Kahlo Baniadam 3F
Tue Feb 09, 2016 2:13 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Midterm Winter 2012
Replies: 2
Views: 360

Re: Midterm Winter 2012

I believe you account for the vaporization using n*deltaH of vaporization.
Heat from the ceramic block is used to heat the water to e vaporization point, and then to fully vaporize it.

-qceramic=qwater + n*deltaH
by Kahlo Baniadam 3F
Wed Jan 27, 2016 1:36 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: The effect the number of moles has on Entropy
Replies: 1
Views: 820

Re: The effect the number of moles has on Entropy

Usually you think primarily of the gas moles because the gas phase has the most entropy. If those are even then move on to liquids, then solids.

This is seen in the solution manual for 9.37
by Kahlo Baniadam 3F
Wed Jan 20, 2016 4:43 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz #1 Topics
Replies: 4
Views: 645

Re: Quiz #1 Topics

My TA told me it would be the entirety of chapters 8 and 9
by Kahlo Baniadam 3F
Wed Jan 13, 2016 4:43 pm
Forum: Phase Changes & Related Calculations
Topic: State function
Replies: 2
Views: 329

Re: State function

Or in other words, it's just the final and initial states that matter.
by Kahlo Baniadam 3F
Mon Jan 11, 2016 1:53 pm
Forum: Phase Changes & Related Calculations
Topic: 8.1 part C
Replies: 1
Views: 234

8.1 part C

In this question it asks if the system is closed, open, or isolated for a bomb calorimeter. What is a bomb calorimeter and what makes it a open, closed, or isolated?
by Kahlo Baniadam 3F
Tue Dec 01, 2015 6:18 pm
Forum: Polyprotic Acids & Bases
Topic: Question 12.81
Replies: 1
Views: 407

Question 12.81

In part a, how do we find/know the ka1 and ka2? We need it to solve for x that we get from the ice table. Also, how do we know which one (ka1 or ka2) to focus on?
by Kahlo Baniadam 3F
Tue Nov 24, 2015 6:16 pm
Forum: Amphoteric Compounds
Topic: Location of amphoteric compounds in periodic table?
Replies: 2
Views: 787

Location of amphoteric compounds in periodic table?

The course reader says they are located around the diagonal band of metalliods, do we need to memorize these? Also, is this the only place where you can find amphoteric compounds?
by Kahlo Baniadam 3F
Thu Nov 19, 2015 4:15 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligand Binding Sites
Replies: 1
Views: 386

Re: Ligand Binding Sites

By the number of lone pairs on the molecule in different areas. For example if it's ethylenediamine it will have 2 binding sites because there are 2 N-atoms with lone pairs.
by Kahlo Baniadam 3F
Mon Nov 16, 2015 10:35 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: ICE Table-Change in Concentration
Replies: 2
Views: 822

Re: ICE Table-Change in Concentration

If you're given initial concentrations of reactants and there is 0 concentration of products, then you have to move towards products to reach equilibrium. You subtract x from the reactants because you have some, and add x to products because reaching equilibrium requires that you have some moles of ...
by Kahlo Baniadam 3F
Mon Nov 16, 2015 10:28 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 2013 Quiz #10: How to set up the ice box
Replies: 1
Views: 291

Re: 2013 Quiz #10: How to set up the ice box

I think since you're taking half the moles of BrCl it makes the reaction move in the direction of BrCl. That's a part of Le Chateliers principle, so you can go from products to reactants if that's what you need to do to establish equilibrium.
by Kahlo Baniadam 3F
Wed Nov 04, 2015 12:07 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Bond Order, Bond Length, and Bond Strength
Replies: 1
Views: 1712

Re: Bond Order, Bond Length, and Bond Strength

The more bonds between atoms, the shorter the bond is. for example a triple bond will be shorter than a double bond. Shorter=stronger, so the shorter the bond is the stronger it is (higher dissociation energy). Bond order is basically the number of bonds between atoms, so a larger number bond order=...
by Kahlo Baniadam 3F
Fri Oct 30, 2015 7:37 pm
Forum: Hybridization
Topic: How to Determine Electron Density
Replies: 4
Views: 1651

Re: How to Determine Electron Density

It's the number of bonds or lone pairs around it. For example NH3, the N is bonded to each H and has its own lone pair, so 4 regions of electron density
by Kahlo Baniadam 3F
Fri Oct 30, 2015 7:36 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: D-orbitial electron configuration
Replies: 1
Views: 360

Re: D-orbitial electron configuration

D orbitals want to be half filled or fully filled. So, for something like Chromium, it will take an electron from the 4s and put it in the 3d to make it 3d54s1 instead of 3d44s2. Same for the whole column, as well as Copper's column.
by Kahlo Baniadam 3F
Fri Oct 23, 2015 1:01 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining atom to double bond with in Lewis Structure
Replies: 1
Views: 229

Re: Determining atom to double bond with in Lewis Structure

You should go by formal charge. For example oxygen likes to double bond so it can have a formal charge of 0
by Kahlo Baniadam 3F
Thu Oct 08, 2015 5:08 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Number of Orbitals per Shell/Subshell
Replies: 1
Views: 283

Re: Number of Orbitals per Shell/Subshell

s,p,d, and f are subshells

s has 1 orbital,
p has 3
d has 5
f has 7
by Kahlo Baniadam 3F
Fri Oct 02, 2015 4:12 pm
Forum: Properties of Electrons
Topic: Homework 1.25
Replies: 1
Views: 381

Re: Homework 1.25

You combine E=hv and c=Lambda x v

You get E=hc/lambda and plug in the constants h and c and the given wavelength

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