Search found 14 matches

by Alexandra Watts 3L
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: 444

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.
by Alexandra Watts 3L
Fri Nov 25, 2016 5:52 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1020229

Re: Post All Chemistry Jokes Here

Why did the acid go to the gym?
To become a buffer solution.
by Alexandra Watts 3L
Mon Nov 14, 2016 4:12 pm
Forum: Naming
Topic: Quiz 3 Prep2 #5
Replies: 1
Views: 274

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.
by Alexandra Watts 3L
Sun Nov 13, 2016 6:45 pm
Forum: Naming
Topic: Quick way to determine oxidation number?
Replies: 1
Views: 737

Quick way to determine oxidation number?

What's everyone's fastest way of determining the oxidation number?
by Alexandra Watts 3L
Thu Nov 10, 2016 1:37 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Drawing MO diagrams
Replies: 2
Views: 358

Re: Drawing MO diagrams

Only the valence electrons need to be drawn
by Alexandra Watts 3L
Thu Nov 03, 2016 11:57 am
Forum: Hybridization
Topic: Bond Character of Fluorine
Replies: 1
Views: 361

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...
by Alexandra Watts 3L
Fri Oct 28, 2016 1:25 am
Forum: Dipole Moments
Topic: Dipole Moment in a Lewis Structure
Replies: 5
Views: 1175

Re: Dipole Moment in a Lewis Structure

How do we know which is negative and which is positive?
by Alexandra Watts 3L
Fri Oct 28, 2016 1:23 am
Forum: Bond Lengths & Energies
Topic: Arranging Ions According to Bond Length
Replies: 1
Views: 394

Re: Arranging Ions According to Bond Length

I find drawing the structure to be the best and easiest way.
by Alexandra Watts 3L
Wed Oct 26, 2016 12:23 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Question on Wedge diagram
Replies: 2
Views: 315

Re: Question on Wedge diagram

No, but we can choose that version if we want to
by Alexandra Watts 3L
Wed Oct 19, 2016 10:39 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: General Question [ENDORSED]
Replies: 2
Views: 369

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)
by Alexandra Watts 3L
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: 411

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...
by Alexandra Watts 3L
Wed Oct 05, 2016 1:15 pm
Forum: DeBroglie Equation
Topic: Post Module Question [ENDORSED]
Replies: 3
Views: 438

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.
by Alexandra Watts 3L
Fri Sep 30, 2016 9:14 am
Forum: Empirical & Molecular Formulas
Topic: Rounding
Replies: 1
Views: 625

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!
by Alexandra Watts 3L
Sun Sep 25, 2016 11:44 am
Forum: Limiting Reactant Calculations
Topic: Mass Always Equal?
Replies: 3
Views: 471

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?

Go to advanced search