Search found 21 matches
- Sat Mar 18, 2017 2:29 pm
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: Winter 2015 Final #9A [ENDORSED]
- Replies: 4
- Views: 2097
Re: Winter 2015 Final #9A [ENDORSED]
Also for this question on the other molecule, is the cycloheptane a substituent because of the alcohol?
- Mon Mar 13, 2017 10:27 am
- Forum: *Cyclopropanes and Cyclobutanes
- Topic: Conformations [ENDORSED]
- Replies: 4
- Views: 2005
Re: Conformations [ENDORSED]
Will we need to know/draw the most stable forms of molecules?
- Mon Mar 06, 2017 10:12 am
- Forum: *Alkanes
- Topic: Isopropyl vs Propyl [ENDORSED]
- Replies: 4
- Views: 24099
Re: Isopropyl vs Propyl [ENDORSED]
Should we always just use the IUPAC naming instead of the common names?
- Thu Mar 02, 2017 11:59 pm
- Forum: *Nucleophiles
- Topic: Ambident
- Replies: 3
- Views: 725
Re: Ambident
Are we expected to know if it is ambident simply by looking at it?
- Thu Feb 23, 2017 5:39 pm
- Forum: *Electrophiles
- Topic: CO2
- Replies: 5
- Views: 1908
Re: CO2
Are we always supposed to just look at the charge of the central atom to determine whether is it an electrophile or nucleophile?
- Wed Feb 15, 2017 3:44 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing equations
- Replies: 10
- Views: 1736
Re: Balancing equations
Is there any way to know if the E value will end up being positive or negative before doing the calculations?
- Tue Feb 14, 2017 7:24 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing equations
- Replies: 10
- Views: 1736
Re: Balancing equations
Since Eo is an intensive property, it is fixed. I believe the only time it changes sign is when you are writing out the half reactions and need to flip signs so that one is reduced and the other is oxidized.
- Fri Feb 03, 2017 2:32 pm
- Forum: Balancing Redox Reactions
- Topic: Cell diagram
- Replies: 3
- Views: 2021
Re: Cell diagram
For cell diagrams, will we just need to know how to translate the short-hand symbols into an actual drawing for tests or is it just generally good for us to know what the short hand is?
- Sat Jan 28, 2017 1:18 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Reversibly & Isothermally
- Replies: 3
- Views: 835
Re: Reversibly & Isothermally
What is the difference between reversible and irreversible reactions (conceptually, not mathematically)?
- Sat Jan 21, 2017 8:06 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Gas Expansion Example [ENDORSED]
- Replies: 1
- Views: 469
Re: Gas Expansion Example [ENDORSED]
I think he was mentioning that it is more efficient for gas expansion to happen in many small increments, than less larger ones
- Sat Jan 14, 2017 1:01 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Bond Enthalpies
- Replies: 7
- Views: 958
Re: Bond Enthalpies
For these types of problems, will we always be given the reaction?
- Thu Dec 01, 2016 10:52 pm
- Forum: Bronsted Acids & Bases
- Topic: Weak Acid
- Replies: 4
- Views: 1086
Re: Weak Acid
This was one of the homework problems (12.51) where HF was a weaker acid than HCl, but in another part of that problem, it stated that HClO2 is a stronger acid than HBrO2 because Cl is more electronegative. So, why is HF a weaker acid if F is more electronegative than Cl?
- Fri Nov 25, 2016 11:56 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Homework Problem Chapter 11 #25
- Replies: 5
- Views: 1237
Re: Homework Problem Chapter 11 #25
The table gives you the reaction and the K value needed to find the equilibrium concentration of H2.
- Sat Nov 19, 2016 7:42 pm
- Forum: Naming
- Topic: Polydentates
- Replies: 4
- Views: 988
Re: Polydentates
Will we have to just memorize the number of lesser known ligands of the list in the course reader (ex. ethylenediamine, oxalato, etc.)?
- Thu Nov 10, 2016 11:09 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Anti-Bonding Orbitals Definition
- Replies: 1
- Views: 508
Re: Anti-Bonding Orbitals Definition
Hi all! I was wondering if someone could give me a definition of anti-bonding orbitals? Does this just refer to the energy levels in the molecular orbital theory? Thanks in advance! I think we'll mainly need to know that it is a type of molecular orbital that, when occupied, ends up weakening the b...
- Tue Nov 01, 2016 7:51 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Midterm
- Replies: 6
- Views: 1260
Re: Midterm
Abigail Foster 1K wrote:Do we need to know bond angles for the midterm?
Yeah we should probably be familiar with the bond angles of different shapes because I think some of the past midterms asked you to find at least one bond angle based on a lewis structure.
- Fri Oct 28, 2016 2:37 pm
- Forum: Hybridization
- Topic: Hybridization [ENDORSED]
- Replies: 4
- Views: 1273
Re: Hybridization [ENDORSED]
HannahLewis wrote:Since it has a sp3 density, does that also mean that it has a tetrahedral structure as well?
I believe if all 4 positions of electron density are occupied by electrons, then it's tetrahedral, but if 3 of the 4 positions are occupied, then the shape is trigonal pyramidal.
- Tue Oct 18, 2016 3:30 pm
- Forum: General Science Questions
- Topic: Rusty on High School Chem [ENDORSED]
- Replies: 347
- Views: 440165
Re: Rusty on High School Chem [ENDORSED]
William_Yi_3B wrote:Can someone tell me where to find the Oxygen on the periodic table
Oxygen (atomic number 8) is in the top row of the p-block, third from the right.
- Thu Oct 13, 2016 9:51 am
- Forum: General Science Questions
- Topic: Formula Sheet
- Replies: 3
- Views: 1235
Re: Formula Sheet
Will the formula sheet be the same as the one on the back of the periodic table we bought?
- Fri Oct 07, 2016 10:17 pm
- Forum: Significant Figures
- Topic: All students read this sig fig post [ENDORSED]
- Replies: 170
- Views: 35055
Re: All students read this sig fig post [ENDORSED]
michaeljwilson3 wrote:Do constants play a role in the significant figures an answer should have?
From what I've seen, I don't think constants affect amount of sig figs in the final answer.
- Fri Sep 30, 2016 1:57 pm
- Forum: *Black Body Radiation
- Topic: Black body [ENDORSED]
- Replies: 3
- Views: 1218
Re: Black body [ENDORSED]
What is the significance of black bodies and will we have to understand all about how they work for the midterm/final?