Search found 14 matches
- Sat Dec 03, 2016 9:07 am
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: When to disregard -x in equilibrium formula?
- Replies: 2
- Views: 508
Re: When to disregard -x in equilibrium formula?
I think it's after you assume to disregard it and proceed to find out what "x" is. You then calculate it as a percentage of the initial M value. If it's less than 5% of the initial molarity then it's okay to disregard it. If not, use quadratic.
- Fri Nov 25, 2016 5:52 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 8017
- Views: 1402931
Re: Post All Chemistry Jokes Here
Why did the acid go to the gym?
To become a buffer solution.
To become a buffer solution.
- Mon Nov 14, 2016 4:12 pm
- Forum: Naming
- Topic: Quiz 3 Prep2 #5
- Replies: 1
- Views: 327
Quiz 3 Prep2 #5
You are studying the following reaction at high temperatures, N2+H2==> NH3
In one of your experiments at 500 K you find at equilibrium:
NH3 Partial pressure= .887
H2= .168
N2= .0561
Determine the equilibrium constant for this reaction at 500K.
In one of your experiments at 500 K you find at equilibrium:
NH3 Partial pressure= .887
H2= .168
N2= .0561
Determine the equilibrium constant for this reaction at 500K.
- Sun Nov 13, 2016 6:45 pm
- Forum: Naming
- Topic: Quick way to determine oxidation number?
- Replies: 1
- Views: 1348
Quick way to determine oxidation number?
What's everyone's fastest way of determining the oxidation number?
- Thu Nov 10, 2016 1:37 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Drawing MO diagrams
- Replies: 2
- Views: 439
Re: Drawing MO diagrams
Only the valence electrons need to be drawn
- Thu Nov 03, 2016 11:57 am
- Forum: Hybridization
- Topic: Bond Character of Fluorine
- Replies: 1
- Views: 474
Re: Bond Character of Fluorine
The second answer is right (2sp3), because you still use hybridization to form the sp hybrid orbital. The s orbital and two of the p orbitals are already full with Flourine's valence electrons, while the one electron left in the third p orbital has room for one more electron (the one bond that Flour...
- Fri Oct 28, 2016 1:25 am
- Forum: Dipole Moments
- Topic: Dipole Moment in a Lewis Structure
- Replies: 5
- Views: 1461
Re: Dipole Moment in a Lewis Structure
How do we know which is negative and which is positive?
- Fri Oct 28, 2016 1:23 am
- Forum: Bond Lengths & Energies
- Topic: Arranging Ions According to Bond Length
- Replies: 1
- Views: 456
Re: Arranging Ions According to Bond Length
I find drawing the structure to be the best and easiest way.
- Wed Oct 26, 2016 12:23 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Question on Wedge diagram
- Replies: 2
- Views: 367
Re: Question on Wedge diagram
No, but we can choose that version if we want to
- Wed Oct 19, 2016 10:39 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: General Question [ENDORSED]
- Replies: 2
- Views: 432
Re: General Question [ENDORSED]
It's the net positive charge of valence electrons, basically how much pull protons have on the outermost electrons. Decreases with increase of levels.
(I think)
(I think)
- Tue Oct 11, 2016 4:45 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Question 2.29 from the textbook [ENDORSED]
- Replies: 2
- Views: 478
Re: Question 2.29 from the textbook [ENDORSED]
No electrons in the same shell can have the exact same set of quantum numbers. So the quantum numbers that have a maximum number of 2 electrons (b and d) can only have two because they are limited in their capacity to differentiate between the given quantum numbers; in other words, they have less ro...
- Wed Oct 05, 2016 1:15 pm
- Forum: DeBroglie Equation
- Topic: Post Module Question [ENDORSED]
- Replies: 3
- Views: 527
Re: Post Module Question [ENDORSED]
The speed of the electron can not be faster than the speed of light, therefore if it the speed is a higher number than the speed of light the speed calculated would be unreasonable.
- Fri Sep 30, 2016 9:14 am
- Forum: Empirical & Molecular Formulas
- Topic: Rounding
- Replies: 1
- Views: 706
Re: Rounding
When I did this problem, the number of moles I calculated for oxygen (after dividing each element's number of moles by the smallest number) was 2.99. I think you were just maybe not being exact enough in your calculations; try to write out more than 2 decimal points of the molar mass. Hope that helps!
- Sun Sep 25, 2016 11:44 am
- Forum: Limiting Reactant Calculations
- Topic: Mass Always Equal?
- Replies: 3
- Views: 572
Mass Always Equal?
If the mass of a chemical reaction never changes from the initial reactants to the final product, in what aspect does the limiting reactant affect the reaction?