Search found 19 matches
- Sat Dec 09, 2017 9:00 pm
- Forum: Sigma & Pi Bonds
- Topic: delocalized pi bond
- Replies: 5
- Views: 2506
delocalized pi bond
how do you know if a bond is delocalized?
- Sat Dec 09, 2017 8:57 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: #33 on Practice test
- Replies: 1
- Views: 469
Re: #33 on Practice test
if the system is compressed, the concentration of gas will increase, which means there is more product, so more reactant will form
- Sun Dec 03, 2017 11:33 pm
- Forum: Amphoteric Compounds
- Topic: 12.17 Part c and Part d
- Replies: 1
- Views: 341
Re: 12.17 Part c and Part d
Because they both have the characteristics of acids and bases. You can easily find these compounds around the diagonal of the periodic table.
- Sun Dec 03, 2017 11:06 pm
- Forum: Bronsted Acids & Bases
- Topic: Is H+ a Bronsted acid?
- Replies: 1
- Views: 484
Is H+ a Bronsted acid?
Is H+ a Bronsted acid?
- Sun Nov 26, 2017 7:39 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: CO3 2-
- Replies: 1
- Views: 367
CO3 2-
How can CO3 2- be monodentate or bidentate?
- Sun Nov 26, 2017 7:37 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: problem11.23
- Replies: 2
- Views: 418
problem11.23
At 500.K, the equilibrium constant for the reaction Cl2(g)+Br2(g)=2BrCl(g) is Kc=0.031. If the equilibrium composition is 0.495 mol/L Cl2 and 0.145 mol/L BrCl, what is the equilibrium concentration of Br2?
What does 500.K mean? And how does that affect the result?
What does 500.K mean? And how does that affect the result?
- Sun Nov 19, 2017 11:27 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: seesaw shape
- Replies: 1
- Views: 476
seesaw shape
shouldn't the two bonds on the axis be bent because of the repulsion of the lone pair?
- Sun Nov 19, 2017 10:49 pm
- Forum: Sigma & Pi Bonds
- Topic: double bonds
- Replies: 5
- Views: 899
double bonds
why do double bonds contain one sigma bond and one pi bond?
- Sun Nov 12, 2017 9:58 pm
- Forum: Lewis Structures
- Topic: atomic structure of HOCO
- Replies: 8
- Views: 1188
Re: atomic structure of HOCO
I think that's because oxygen has higher ionization energy.
- Sun Nov 12, 2017 9:37 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Trigonal Bipyramidal with 1 lone pair and 4 bonds
- Replies: 3
- Views: 621
Re: Trigonal Bipyramidal with 1 lone pair and 4 bonds
Because on the equatorial plane the lone pair only has 2 bonds which are 90° from it, but if it is on the axis it will have 3. So the lone pair repels less bonds on the equatorial plane.
- Sun Nov 05, 2017 6:12 pm
- Forum: Trends in The Periodic Table
- Topic: electron affinities
- Replies: 2
- Views: 395
electron affinities
what are the electron affinities of group IIA elements and noble gases?
- Sun Nov 05, 2017 4:28 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: trigonal pyramidal
- Replies: 3
- Views: 490
trigonal pyramidal
is it that when there are three bonds and a lone pair on the central atom it forms trigonal pyramidal structure?
- Sun Oct 29, 2017 5:15 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: 4s and 3d orbitals
- Replies: 5
- Views: 1786
4s and 3d orbitals
Since 4s orbitals are filled by electrons before 3d orbitals, why are electrons lost from 4s orbitals first?
- Sun Oct 29, 2017 4:56 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Nodes
- Replies: 4
- Views: 652
Re: Nodes
A nodal plane is also called a angular node. The number of nodal planes (angular nodes) is l, and by subtracting the number of nodes (n−1) by the number of nodal planes you can get the number of radial nodes (nodal surfaces), which is n−l−1
- Sun Oct 22, 2017 11:41 pm
- Forum: *Shrodinger Equation
- Topic: Double derivative [ENDORSED]
- Replies: 3
- Views: 721
Double derivative [ENDORSED]
What does double derivative mean?
- Sun Oct 15, 2017 9:11 pm
- Forum: Properties of Light
- Topic: Planck's Constant
- Replies: 10
- Views: 1266
Re: Planck's Constant
when using the equations E=hν and λ=h/p
- Sun Oct 15, 2017 8:59 pm
- Forum: Properties of Electrons
- Topic: Speed/Energy of Electrons
- Replies: 4
- Views: 667
Re: Speed/Energy of Electrons
The speed of electron ejected is related to its kinetic energy, which is the energy of photon subtracted by the threshold energy. It's not related to the speed of light. You can use the speed of light to calculate the frequency and energy of photons.
- Sat Oct 07, 2017 4:34 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Molarity unit [ENDORSED]
- Replies: 11
- Views: 1630
Re: Molarity unit [ENDORSED]
The mostly used unit M is mol/L, but you can also use other units such as mol/mL
- Sat Oct 07, 2017 4:15 pm
- Forum: Balancing Chemical Reactions
- Topic: Net Moles Produced [ENDORSED]
- Replies: 5
- Views: 879
Re: Net Moles Produced [ENDORSED]
just subtract the coefficients of products by the coefficients of reactants