Search found 21 matches
- Sat Mar 18, 2017 11:47 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3861724
- Fri Mar 17, 2017 3:11 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3861724
- Thu Mar 16, 2017 2:09 pm
- Forum: *Cycloalkenes
- Topic: Naming [ENDORSED]
- Replies: 2
- Views: 1850
Re: Naming [ENDORSED]
Thank you!!
- Thu Mar 16, 2017 12:27 am
- Forum: *Cycloalkenes
- Topic: Naming [ENDORSED]
- Replies: 2
- Views: 1850
Naming [ENDORSED]
Hi, can someone help explain why they numbered it like this instead of how I numbered it?
- Tue Mar 07, 2017 10:24 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3861724
Re: Post All Chemistry Jokes Here
I'm diene
- Tue Mar 07, 2017 10:13 pm
- Forum: *Alkanes
- Topic: Iso and Neo Prefixes
- Replies: 5
- Views: 1324
Re: Iso and Neo Prefixes
The prefixes 'iso-' and 'neo-' are used for common naming instead of IUPAC naming; 'iso-' being used when there are 4 or less carbons, and 'neo-' when there are five or more. Common naming doesn't follow the rule of numbering the longest carbon chain, but instead counts all of the carbons. Using co...
- Mon Feb 20, 2017 9:28 pm
- Forum: Second Order Reactions
- Topic: Determining rate constant
- Replies: 1
- Views: 427
Determining rate constant
The problem states:
"Determine the rate constant for second order equation 2A -> B + C given that the concentration of A decreases from 2.5 x 10-3 M to 1.25 x 10-3 M in 100.0 seconds."
How would you solve this?
"Determine the rate constant for second order equation 2A -> B + C given that the concentration of A decreases from 2.5 x 10-3 M to 1.25 x 10-3 M in 100.0 seconds."
How would you solve this?
- Tue Feb 07, 2017 2:22 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3861724
- Fri Jan 27, 2017 10:32 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3861724
- Tue Nov 29, 2016 10:22 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: Finding initial concentration given pH and Ka
- Replies: 1
- Views: 5248
Finding initial concentration given pH and Ka
The problem states: "Find the initial concentration of HClO with a pH of 4.60 (Ka = 3.0x 10^-8)." I understand you have to use an ICE table to solve for it but I'm not sure how to find the change in molarity with the info given? And after finding the change in molarity do I just solve for x?
- Mon Nov 28, 2016 2:59 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Quiz 3 Prep Quiz #8
- Replies: 1
- Views: 559
Quiz 3 Prep Quiz #8
The question states: "The reaction N2(g) + O2(g) = 2NO (g) contributes to air pollution whenever a fuel is burned in air at a high temperature. At 1500 K, Kc = 1.0x10^-5. A sample of air is heated in a closed container to 1500 K. Before any reaction occurs [N2] = 0.80 M and [O2] = 0.20 M. Calcu...
- Mon Nov 28, 2016 2:50 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3861724
Re: Post All Chemistry Jokes Here
What happens to nitrogen when the sun rises?
It becomes daytrogen.
It becomes daytrogen.
- Wed Nov 16, 2016 12:32 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3861724
Re: Post All Chemistry Jokes Here
You'd think that atoms bonding with other atoms would mean they're being friendly, but really they steal each other's electrons.
How ionic.
How ionic.
- Thu Nov 10, 2016 12:04 am
- Forum: Naming
- Topic: Oxidation Number
- Replies: 3
- Views: 801
Re: Oxidation Number
The oxidation number is essentially the charge of the metal. So first you would need to calculate the charges of the other ligands in the complex and those charges plus the charges of the metal should add up to the total charge of the complex. For example, take [Fe(CN)5]2-, The charge of CN is 1-, ...
- Wed Nov 09, 2016 11:26 pm
- Forum: Naming
- Topic: Oxidation Number
- Replies: 3
- Views: 801
Oxidation Number
How do you determine the oxidation number of transition metals?
- Tue Nov 01, 2016 3:23 pm
- Forum: Hybridization
- Topic: s-character of hybrids
- Replies: 1
- Views: 566
Re: s-character of hybrids
Hi, this was answered in a previous post: "Answer: s-character is the contribution of sigma type bond in a hybridization: sp3 = 25% s-character, 75% p-character sp2 = 33% s-character, 66% p-character sp = 50% s-character, 50% p-character The more s-character a bond has, the stronger and shorter...
- Mon Oct 31, 2016 11:54 am
- Forum: Hybridization
- Topic: Chapter 4- Question 43
- Replies: 1
- Views: 587
Re: Chapter 4- Question 43
Hi, this was answered in a previous post: "Answer: s-character is the contribution of sigma type bond in a hybridization: sp3 = 25% s-character, 75% p-character sp2 = 33% s-character, 66% p-character sp = 50% s-character, 50% p-character The more s-character a bond has, the stronger and shorter...
- Mon Oct 31, 2016 9:58 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Tetrahedral Angles
- Replies: 1
- Views: 989
Tetrahedral Angles
Hi, I've memorized the bond angles for all the VSEPR geometries but I don't seem to understand why the tetrahedral shape has angles of 109.5 degrees. It's hard for me to picture it without a 3D diagram. Could anyone explain? Thank you in advance!
- Mon Oct 24, 2016 1:44 pm
- Forum: Ionic & Covalent Bonds
- Topic: Stronger bonds
- Replies: 3
- Views: 1907
Stronger bonds
How would we be able to tell which molecules have stronger bonds? Or in other words, what makes a bond strong?
- Tue Oct 11, 2016 3:22 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3861724
Re: Post All Chemistry Jokes Here
How many moles are in a guacamole? Avocado's number.
- Mon Oct 03, 2016 7:51 pm
- Forum: Properties of Electrons
- Topic: Constructive and Destructive Interference [ENDORSED]
- Replies: 3
- Views: 1743
Constructive and Destructive Interference [ENDORSED]
What does it mean for waves to interact in-phase and out-of-phase?