Search found 17 matches

by Vinay Sharma 3L
Sun Mar 13, 2016 10:07 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Cyclohexane chair conformations
Replies: 1
Views: 312

Cyclohexane chair conformations

How do you tell the difference between cis and trans on a cyclohexane chair conformations?
by Vinay Sharma 3L
Sun Mar 06, 2016 10:05 pm
Forum: *Alkanes
Topic: Structural formula vs Condensed formula
Replies: 1
Views: 498

Structural formula vs Condensed formula

How do you tell the difference between a structural formula and a condensed formula for a an organic molecule, as they both have parentheses?
by Vinay Sharma 3L
Sun Feb 28, 2016 10:37 pm
Forum: *Alkanes
Topic: Suffixes
Replies: 2
Views: 588

Re: Suffixes

Hello Lovelyn,

The -ane ending indicated the molecule has single bonds throughout it. The -ene ending means that there is a dounle bond within the molecule. The -yne ending indicated there is a triple bond within the molecule. The -ol ending indicates there is an alcohol group (OH) on the molecule.
by Vinay Sharma 3L
Mon Feb 15, 2016 2:39 am
Forum: General Rate Laws
Topic: Half lifes
Replies: 1
Views: 311

Half lifes

How can you derive the formulas for the half lives of each of the orders without memorizing the actual equations?
by Vinay Sharma 3L
Sun Jan 24, 2016 9:41 pm
Forum: Phase Changes & Related Calculations
Topic: Practice Quiz 1 Question 8
Replies: 2
Views: 467

Re: Practice Quiz 1 Question 8

Cl2 indicates that there is a bond between two chlorine atoms while 2Cl indicates that there are two moles of chlorine atoms without any bonds between the atoms. Therefore, the 1 mole of Cl2 atoms break the bonds to form 2 moles of Cl atoms.
by Vinay Sharma 3L
Sun Jan 17, 2016 9:23 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Homework 8.11
Replies: 3
Views: 1735

Re: Homework 8.11

When you multiply -(1.00 atm)(1.20L), the units are L*atm, which is not the same units as joules. The conversion between joules and L*atm is 101.324 joules for every L*atm. Thus, when you convert -1.2 L*atm to joules and use sig figs, you get 122 joules.
by Vinay Sharma 3L
Fri Jan 08, 2016 10:53 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Phase Change
Replies: 1
Views: 297

Re: Phase Change

Heat is the is the energy transferred as a result of a temperature difference, whereas temperature is the average kinetic energy of all the particles in a substance. As temperature increases, the proportion of particles in a substance that have high energy also increases. Energy transferred to a sub...
by Vinay Sharma 3L
Sun Dec 06, 2015 2:35 am
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: ICE Tables
Replies: 2
Views: 596

ICE Tables

How do you know when you can assume X is so small it makes little difference in the concentration of the reactants? Thanks!
by Vinay Sharma 3L
Sun Nov 29, 2015 10:20 pm
Forum: Lewis Acids & Bases
Topic: Acids and Bases
Replies: 1
Views: 340

Acids and Bases

How do you know whether a polyprotic acid will either partially dissociate or fully dissociate in an aqueous solution?
by Vinay Sharma 3L
Sun Nov 15, 2015 11:11 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Changes in both reactants and products
Replies: 1
Views: 372

Changes in both reactants and products

If both the reactants and products increase in concentration, how do you know which direction the reaction shifts? Does it deal with the molar coefficients in the balanced equation?
by Vinay Sharma 3L
Sun Nov 08, 2015 11:20 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K Constant
Replies: 3
Views: 485

K Constant

What does a large K mean in terms of products and reactants? What does a small K indicate?
by Vinay Sharma 3L
Sun Nov 01, 2015 10:33 pm
Forum: Octet Exceptions
Topic: Do octet exceptions based on formal charge exist?
Replies: 1
Views: 427

Re: Do octet exceptions based on formal charge exist?

You can take BF3 for an example. The central atom Boron creates three single bonds with the adjacent Fluorine atoms, creating a formal charge of 0 for Boron, though the octet rule is not satisfied. Also, in your example, Nitrogen would never satisfy the octet rule and have a formal charge of 4. The ...
by Vinay Sharma 3L
Sun Oct 25, 2015 11:12 pm
Forum: Lewis Structures
Topic: Expanded Octet vs Formal Charge
Replies: 1
Views: 889

Expanded Octet vs Formal Charge

I am confused on some of the problems regarding expanded octets and formal charge. For example, when creating the Lewis structure for OPCl3, the P atom has 4 bonds to the 3 Cl atoms and the O atom. This structure creates a formal charge of +1 on the P atom and -1 on the O atom. I believe the structu...
by Vinay Sharma 3L
Sun Oct 18, 2015 6:40 pm
Forum: Ionic & Covalent Bonds
Topic: Bond Strength
Replies: 2
Views: 494

Re: Bond Strength

An energy well is the the area surrounding a local minimum of potential energy. To overcome the potential energy well, a lot of energy is needed. This indicates that a strong bond is present because stronger bonds require more energy to break.
by Vinay Sharma 3L
Sun Oct 11, 2015 9:37 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Constant
Replies: 2
Views: 628

Rydberg Constant

So last week, I accidentally came to class an hour early, and sat in on a chem 20A class. The professor was deriving the Rydberg constant and it came out to be different from what we use in chem 14A. Does anyone know why there are different values for the Rydberg constant?

Thanks,
Vinay
by Vinay Sharma 3L
Sun Oct 04, 2015 9:20 pm
Forum: Properties of Light
Topic: Spectral Lines
Replies: 1
Views: 395

Spectral Lines

Why do the amount of spectral lines in the emission spectrum of hydrogen differ from the black lines in the absorption spectrum?
by Vinay Sharma 3L
Sun Oct 04, 2015 9:09 pm
Forum: Properties of Light
Topic: Wavelength
Replies: 3
Views: 469

Re: Wavelength

2.5 nanometers is 2.5 X 10^-9 meters.

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