Q: What do you call a tooth in a glass of water?
A: One molar solution.
Search found 18 matches
- Wed Mar 15, 2017 7:22 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705086
- Sun Mar 12, 2017 5:43 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705086
Re: Post All Chemistry Jokes Here
Q: Why did the noble gas cry?
A: Because all his friends Argon
A: Because all his friends Argon
- Sun Mar 05, 2017 11:32 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705086
Re: Post All Chemistry Jokes Here
Which biochemicals wash up on beaches?
-Nucleotides
-Nucleotides
- Sun Feb 26, 2017 10:46 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705086
Re: Post All Chemistry Jokes Here
What do chemists put up during Christmas?
-A Chemistree
-A Chemistree
- Sun Feb 19, 2017 11:45 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3705086
Re: Post All Chemistry Jokes Here
Q: What do you do with a sick chemist?
A: If you can't helium, and you can't curium, then you might as well barium.
A: If you can't helium, and you can't curium, then you might as well barium.
- Sun Feb 12, 2017 11:11 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagram
- Replies: 1
- Views: 479
Cell Diagram
When writing the cell diagram, do we write the edited version of the half reaction (such as after being multiplied by 2) or do we write the original version?
- Sun Feb 05, 2017 10:56 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Homework 14.37
- Replies: 1
- Views: 497
Homework 14.37
In #37, it asks to determine the potential of each of the following cells. How would you determine the potential of the cell when for example you are given:
Pt(s)|H2(g, 1.0 bar)|HCl(aq, 0.075 M)||HCl (aq, 1.0 mol/L)|H2(g, 1.0 bar)|Pt(s)
Any help would be appreciated!
Pt(s)|H2(g, 1.0 bar)|HCl(aq, 0.075 M)||HCl (aq, 1.0 mol/L)|H2(g, 1.0 bar)|Pt(s)
Any help would be appreciated!
- Sun Jan 29, 2017 11:07 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: HW: 9.23 COF2 and BF3
- Replies: 2
- Views: 628
Re: HW: 9.23 COF2 and BF3
That could be a possible explanation, but it would best to draw out lewis structures of COF2 and BF3. By drawing out the structures, you can see that the elements can be in different positions, and whichever molecule has the most displacements, it will have higher entropy.
- Sun Jan 22, 2017 11:38 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: 8.31
- Replies: 2
- Views: 769
Re: 8.31
I believe it is derived from the equation: Cp,m=Cv,m + R Cp,m=3/2R + R Cp,m = 5/2 R Section 8.10 in the book provides more information about the molar heat capacity at a constant volume/pressure for monatomic gases. I don't think we have to memorize this since it is also found on the back of our per...
- Sun Jan 15, 2017 11:56 pm
- Forum: Phase Changes & Related Calculations
- Topic: HW 8.77
- Replies: 1
- Views: 524
HW 8.77
Could someone please explain how to do the following problem: Benzene is more stable and less reactive than would be predicted from its Kekule structures. Use the mean bond enthalpies in table 8.7 to calculate the lowering in molar energy when resonance is allowed between the Kekule structures of be...
- Mon Nov 14, 2016 2:12 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentate [ENDORSED]
- Replies: 2
- Views: 865
Polydentate [ENDORSED]
Could someone please explain what a polydentate is and how you would determine whether it is monodentate, bidentate, tridentate and so on?
- Fri Nov 04, 2016 6:21 pm
- Forum: Hybridization
- Topic: Homework 4.43
- Replies: 1
- Views: 594
Homework 4.43
For question 43, it gives you that the bond angle of the sp^3 hybridized atom is 109.5 degrees and the bond angle of an sp^2 hybridized atom is 120 degrees. The question asks if you expect the bond angle between two hybrid orbitals to increase or decrease as the s-character of the hybrids is increas...
- Fri Nov 04, 2016 6:21 pm
- Forum: Hybridization
- Topic: Homework 4.43
- Replies: 1
- Views: 524
Homework 4.43
For question 43, it gives you that the bond angle of the sp^3 hybridized atom is 109.5 degrees and the bond angle of an sp^2 hybridized atom is 120 degrees. The question asks if you expect the bond angle between two hybrid orbitals to increase or decrease as the s-character of the hybrids is increas...
- Sun Oct 30, 2016 9:26 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polar vs Nonpolar
- Replies: 2
- Views: 742
Polar vs Nonpolar
How do you determine whether a molecule is polar or nonpolar?
- Sun Oct 23, 2016 9:58 pm
- Forum: Lewis Structures
- Topic: Homework 3.39
- Replies: 1
- Views: 580
Homework 3.39
For question 39, it asks to draw the lewis structure for ammonium chloride, potassium phosphide, and sodium hypochlorite. I looked in the solutions manual and the lewis structure for all of them were drawn separately (ex: phosphorus is surrounded by potassium but they're not bonded together). Could ...
- Sat Oct 15, 2016 9:49 am
- Forum: Ionic & Covalent Bonds
- Topic: Ionization Energy [ENDORSED]
- Replies: 2
- Views: 808
Ionization Energy [ENDORSED]
Could someone please explain why the ionization energy for oxygen is lower than that of nitrogen or fluorine?
- Fri Oct 07, 2016 10:23 am
- Forum: Properties of Electrons
- Topic: Atomic Spectra Question [ENDORSED]
- Replies: 3
- Views: 970
Re: Atomic Spectra Question [ENDORSED]
You are given that the ultraviolet spectrum of atomic hydrogen is observed at 102.6 nm. Since the ultraviolet spectrum of atomic hydrogen is also known as the Lyman series, it has a final energy level of n1=1. So, you use the equation v(frequency)=c/lambda to solve for the frequency (2.998 x 10^8 m ...
- Fri Sep 30, 2016 2:30 pm
- Forum: Properties of Electrons
- Topic: Atomic Spectrum
- Replies: 1
- Views: 573
Atomic Spectrum
For question 1.13, it says to use the Rydberg formula for atomic hydrogen to calculate the wavelength of radiation generated by the transition from n=4 to n=2. What is the Rydberg formula?