CHEMISTRY COMMUNITY

Aaron Ang 4H

London dispersion forces, also known as induced dipole-dipole forces are temporary forces that from between all molecules. They occur randomly and constantly occur when the electrons in molecules are distorted creating temporary positive and negative charges which attract but go away once electrons ...

Aaron Ang 4H

I get that ligands are put in order when naming a compound but why is that it is different in the chemical formula? An example of this is [FeCl(OH2)5]+ and the name is pentaaquachloridoiron(II) and i get that but why is chlorine in front of the water in the formula?

Aaron Ang 4H

Electronegativity is the tendency of an atom to gain an electron while its ionization energy its tendency/ energy required to lose its electron

Aaron Ang 4H

I would just have both on the paper just to be safe but for the final answer, definitely go with the molecular geometry

Aaron Ang 4H

The rule for the sequence of elements in a chemical formula is Carbon, Hydrogen, other elements in alphabetical order and if there is no carbon or hydrogen, then it is just elements in alphabetical order

Aaron Ang 4H

Everything is posted on Dr. Lavelle's website. For quiz 3, it will be on the end of bonding and all of molecular shape and structure

Aaron Ang 4H

I dont think it matters. Both ways of writing the hybridization orbital works

Aaron Ang 4H

O cannot be the central atom because since both oxygen and nitrogen are in period 2, they must follow the octet rule. Furthermore, nitrogen needs to have 3 bonds therefore, having oxygen as the central atom would be impossible due to the amount of electrons available and due to formal charge

Aaron Ang 4H

Can someone please explain how to predict the position of lone pairs when determining a molecule's molecular shape?

Aaron Ang 4H

To my knowledge, there is no actual average time that London dispersion forces will act upon two molecules for. The are temporary bonds that are constantly forming and constantly breaking.

Aaron Ang 4H

How can the VESPR theory be used to predict the shape of the molecule?

Aaron Ang 4H

When the electron is in the axial plane, it is vertical plane through the middle of the central atom while electrons on the equatorial plane are in the horizontal plane through the middle of the central atom

Aaron Ang 4H

London dispersion forces are created when electrons from two separate atoms/molecules move around and occupy positions that make the atoms form temporary dipoles which which causes a temporary attractive force. Therefore, London dispersion forces exist because all elements have electrons and will fo...

Aaron Ang 4H

Molecules in a liquid form are more spread out than molecules in a solid form therefore the intermolecular forces in between them are weaker in the liquid form as opposed to the solid form. To answer your second question, CCl4 has a higher boiling point than CH4 because it has more electrons and the...

Aaron Ang 4H

Yes, there is a relationship between state of matter and bond length. Those in the gas state have the weakest bonds which is then followed by compounds in the liquid state which is weaker than compounds in the solid form.

Aaron Ang 4H

For all n values under 4, you could just fill them based on increasing n values and in the order of s-orbitals first and then p-orbitals. However, starting with an n value of 4, you would fill orbitals starting with the s-orbital followed by the d- orbital and then the p-orbital. However, when writi...

Aaron Ang 4H

First Ionization energies typically decrease down a group and increase across a period (from left to right)

Aaron Ang 4H

Nitrogen has a lower ionization energy than oxygen because nitrogen is half filled which according the Hund's rule, half filled and full filled orbitals are more stable.

Aaron Ang 4H

Another example of isoelectronic Molecules is Cl+, Ar, and K-

Aaron Ang 4H

Electron affinity decreases down a group and increases across a period

Aaron Ang 4H

Also, another trend for electron affinity can be seen when you go diagonally from the bottom left to the top right of the periodic table. Chlorine has the greatest electron affinity.

Aaron Ang 4H

From what I recall from lecture today, we will only be asked questions with the px, py, and pz orbitals. We will not have to know dxy, dyz, dzx or any of the f orbitals

Aaron Ang 4H

It depends on the object that is moving. According to Einstein's theory of special relativity, if the object with no rest mass is traveling closer to the speed of light, the mass increases. As an object approaches the speed of light, its mass approaches infinity as well

Aaron Ang 4H

No not everything has rest mass. For example, you could not use De Broglie's equation to solve for the wavelength of light because it is massless. You could only use this equation for anything that has a mass.

Aaron Ang 4H

Yes, the empirical and molecular formula can be the same depending on the molar weight provided by the question. For example, if your empirical formula was H2O and the molar weight provided was 18.02, then the molecular formula would also be H2O.

Aaron Ang 4H

In order to write a chemical formula, you start off by listing the carbon atoms followed by the hydrogen atoms and then alphabetical order.

Aaron Ang 4H

The photoelectric experiment shines light on a metal surface to measure energy needed to remove electrons from different metals. As the light is shined on the metal, the energy generated is conserved thus the threshold energy is equal to the energy of the electron that is deflected. Therefore, E=hv ...

Aaron Ang 4H

The question about adding the state of matter to a chemical equation was brought up in my discussion today and the TA said that the questions asked on the tests should be pretty self explanatory in this regard and that we would definitely be able to infer the state of matter. As for balancing a chem...

Aaron Ang 4H

you would use avagadro's number for both molecules and atoms

Aaron Ang 4H

First figure out what the metal is based on its molar mass and then find the molar mass of the metal sulfide.

CHEMISTRY COMMUNITY

Search found 30 matches

Re: Induced dipole-induced dipole

Naming of compounds with multiple ligands

Re: Electronegativity vs ionization energy

Re: Electron Geometry and Molecular Geometry

Re: Molecular orientation

Re: Quiz

Re: Sp3d or dsp3

Re: N2O Lewis Structure

VESPR Theory

Re: London Force Times

VESPR Theory

Re: vsper structures

Re: London Forces

Re: Liquid and Solid Formation

Re: Bond strength and state of matter

Re: S and d orbitals order in configuration

Re: Trends in first ionization energies

Re: Why is ionization energy of oxygen lower than nitrogen?

Re: Isoelectronic Molecules

Re: Electron Affinity [ENDORSED]

Re: Electron Affinity

Re: d- orbitals

Re: Rest Mass v. Movement

Re: Rest Mass

Re: Empirical & Molecular Formulas

Re: Order of Molecules

Re: Confusion on Photoelectric Effect

Re: How To....

Re: Avogadro's Number

Re: E. 15 (7th Edition)