Search found 20 matches
- Sun Jul 30, 2017 6:21 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Question 11.39
- Replies: 3
- Views: 579
Re: Question 11.39
Well you are given this equation at 300 K and as you can see the equation you're given is two equations on the chart 11.2 combined. You can say that they are multiplied into one equation so you would look at both these equations on the chart at 300 and multiply their Kc.
- Sun Jul 30, 2017 6:16 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Quadratic formula
- Replies: 2
- Views: 456
Re: Quadratic formula
I want to add that you also don't use the number that is less than the initial concentration because once again you might be getting a negative concentration.
- Sun Jul 30, 2017 3:57 pm
- Forum: Lewis Structures
- Topic: Le Chatelier's Principle
- Replies: 1
- Views: 426
Le Chatelier's Principle
Can someone please give me a brief explanation of Le Chatelier's principle, I don't understand how increasing or decreasing the pressure/concentration of one molecule will affect the others.
- Sat Jul 29, 2017 4:17 pm
- Forum: Lewis Acids & Bases
- Topic: Chemical Equilibrium [ENDORSED]
- Replies: 2
- Views: 515
Chemical Equilibrium [ENDORSED]
When doing an ICE chart and adding or subtracting the X's, do you always subtract the reactant and add to the product?
- Sun Jul 23, 2017 6:21 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Covalent and Ionic Bonds
- Replies: 1
- Views: 356
Covalent and Ionic Bonds
Can someone please explain the difference between covalent and ionic bonds?
Re: Ch.17
Well in class he emphasized that the practice problems are what are going to be on the test.
- Sat Jul 22, 2017 9:23 pm
- Forum: Student Social/Study Group
- Topic: Molecular Shapes
- Replies: 1
- Views: 477
Molecular Shapes
I have a question on what molecular shapes we are supposed to know because in the course reader we are given 5 different ones but the textbook on pg.109, there are 12 different kinds. Does anyone know which to focus on more?
- Fri Jul 21, 2017 3:51 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Chapter 3
- Replies: 1
- Views: 304
Chapter 3
For Chapter 3 on question 25 we are told to write the chemical formula for the given compounds, are we supposed to know how to do this. Like for example we are given magnesium arsenide, and are told to write it out as Mgsub3 ASsub2.
- Sun Jul 16, 2017 3:58 pm
- Forum: Trends in The Periodic Table
- Topic: 1st and 2nd ionization energy? [ENDORSED]
- Replies: 7
- Views: 9977
Re: 1st and 2nd ionization energy? [ENDORSED]
Another small thing to remember about the 2nd ionization energy is that it will always be greater than the 1st for the reasons explained above.
- Sun Jul 16, 2017 3:54 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Quick Question about SO4
- Replies: 8
- Views: 1290
Re: Quick Question about SO4
I believe that the second structure is more stable because you want the least amount of negatives in the formal charge. For example in the first structure you have 4 (-1) formal charges and in the second one you only have 2. If I am wrong please correct me.
- Sun Jul 16, 2017 3:50 pm
- Forum: Ionic & Covalent Bonds
- Topic: Polar vs. nonpolar
- Replies: 2
- Views: 489
Re: Polar vs. nonpolar
I am also confused on how to determine polar bonds, can someone also please explain dipoles.
- Sat Jul 15, 2017 1:23 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2988403
Re: Post All Chemistry Jokes Here
I would make another chemistry joke but all the good ones ARGON.
- Sun Jul 09, 2017 2:33 pm
- Forum: Student Social/Study Group
- Topic: Schrodinger
- Replies: 1
- Views: 448
Schrodinger
Can someone please explain Schrodingers Equation please?
- Sun Jul 09, 2017 2:29 pm
- Forum: Student Social/Study Group
- Topic: Thoughts after Test 1?
- Replies: 13
- Views: 1950
Re: Thoughts after Test 1?
I realized that I felt so much pressure that I wasn't able to read the questions and interpret them the way I might have understood it. My friend had explained the question to me after the test and I had realized it was easier than I thought.
- Sun Jul 09, 2017 2:27 pm
- Forum: Student Social/Study Group
- Topic: Electron Configuration
- Replies: 2
- Views: 570
Electron Configuration
Can someone please reexplain the exception of 4s and 3d
- Sun Jul 09, 2017 2:18 pm
- Forum: Student Social/Study Group
- Topic: De Broglie
- Replies: 1
- Views: 422
De Broglie
How do we know if something has measurable wavelike properties like the example on page 52 of the course reader ?
- Sun Jul 02, 2017 10:39 am
- Forum: Administrative Questions and Class Announcements
- Topic: Quantum Question
- Replies: 2
- Views: 560
Quantum Question
In the course reader page 48, I understand the worked out problem, but I do not get why the 4.09 x 10^(-19) J goes from negative to positive towards the end.
- Sun Jul 02, 2017 10:22 am
- Forum: DeBroglie Equation
- Topic: Class Quetsion
- Replies: 2
- Views: 533
Class Quetsion
In class Dr. Lavelle mentioned 10^(-12)m=pm, 10^(-9)m=nm, and 10^(-3)m=mm. I am confused on what units these are or what they mean exactly. Can someone explain them to me please.
- Sun Jul 02, 2017 10:13 am
- Forum: DeBroglie Equation
- Topic: Textbook Vs the Exams
- Replies: 1
- Views: 494
Textbook Vs the Exams
In the textbook there are problems that ask for you to write the equation of a certain reaction, are we supposed to know certain chem equations for the tests or exams?
- Sun Jul 02, 2017 10:08 am
- Forum: DeBroglie Equation
- Topic: Test Questions
- Replies: 2
- Views: 567
Test Questions
When I solve problems from the textbook, I am usually off by a decimal, will I get deducted points if that happens in a test?