## Search found 6 matches

Sun Feb 07, 2016 9:15 pm
Forum: Balancing Redox Reactions
Topic: Balancing Redox Reactions
Replies: 1
Views: 269

### Re: Balancing Redox Reactions

Hey, don't fear! :) This is the method I was taught (I'll use an example, question 14.3b): MnO 4 - + H 2 SO 3 ---> Mn 2+ + HSO 4 - In MnO 4 - (oxidizing agent) Mn = +7 O = -2 In H 2 SO 3 (reducing agent) H = +1 S = +4 O = -2 In Mn 2+ Mn = 2+ In HSO 4 - H = +1 S = +6 O = -2 When balancing half equati...
Mon Jan 18, 2016 12:00 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Units
Replies: 2
Views: 413

### Re: Units

Delta H is used to express a change in energy, normally done using either J or kJ.

However, there may be specific problems that ask you of the delta H of one mole of a substance reacting where, in that case, the delta H would be equal to the delta H per mole.
Sun Nov 29, 2015 3:35 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lewis Structures
Replies: 2
Views: 441

### Re: Lewis Structures

Lewis Structures Video
Collaborators: Delaire Fattah & Shaheen Abkenari
Sun Oct 25, 2015 9:10 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining bond angles
Replies: 2
Views: 380

### Re: Determining bond angles

If two of the F atoms are replaced with Cl atoms, you would get the same effect but more amplified. The difference isn't very significant though. Electron lone pairs are what cause significant differences in bond angles. What's most important to note in these situations is that the molecule is no lo...
Sun Oct 18, 2015 11:55 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Spins
Replies: 3
Views: 559

### Electron Spins

So I recently came across a situation I didn't understand. Lets say in a 2p sub-shell we have three electrons. Each electron fills 1 of the 3 orbitals, resulting in 3 half filled orbitals. (Hund's Rule) What I need clarification on is why do all 3 of the electrons need to be spinning in the same dir...
Sun Oct 04, 2015 11:30 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Delta x
Replies: 4
Views: 1644

### Re: Delta x

x refers to the position of the entity delta x is the uncertainty or indeterminacy of the position of that entity in an environment. (p and delta p refer to momentum.) The second example in the workbook regarding Heisenberg's indeterminacy equation refers to an electron orbiting an atom. We know, th...

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