Search found 34 matches

by Jasmine Reddy DIS 1E
Thu Dec 06, 2018 10:22 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizable
Replies: 4
Views: 84

Re: Polarizable

Greatest ionic character is between the species with the most polarizability/greatest polarizing power because the electron clouds are more distorted, creating dipole moments. Greatest covalent character is between species with the least polarizability/least polarizing power. In my notes, I wrote d...
by Jasmine Reddy DIS 1E
Thu Dec 06, 2018 10:07 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Overall Polarity of the Molecule/Net Dipole
Replies: 1
Views: 39

Overall Polarity of the Molecule/Net Dipole

How do lone pairs affect the net dipole of a molecule?
How can you determine if a molecule has a net dipole by looking at its VSEPR formula?
How can you determine the overall polarity of a molecule by looking at its lewis structure?
by Jasmine Reddy DIS 1E
Thu Dec 06, 2018 10:05 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizing Power: Size vs. Charge
Replies: 3
Views: 73

Polarizing Power: Size vs. Charge

When determining the polarizing power of a cation, which is more important: size of the cation or charge of the cation?
by Jasmine Reddy DIS 1E
Thu Dec 06, 2018 9:54 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Size and Polarizability
Replies: 4
Views: 62

Size and Polarizability

In class, we learned that the larger the anion, the more polarizable it is.
How is size of an anion measured in this case? Is size referring to ionic radii?
by Jasmine Reddy DIS 1E
Tue Dec 04, 2018 6:45 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligand Binding Places
Replies: 2
Views: 47

Ligand Binding Places

Given just a ligand, how can you determine the maximum number of places on the ligand that can bind simultaneously to a single metal center?

Ex. For , how do you determine if it is monodentate, bidentate, or tridentate ligand?
by Jasmine Reddy DIS 1E
Tue Dec 04, 2018 5:28 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Identifying Ligands
Replies: 2
Views: 47

Identifying Ligands

How do we determine if a given molecule is a ligand?
by Jasmine Reddy DIS 1E
Tue Dec 04, 2018 5:26 pm
Forum: Naming
Topic: Ligand Charge
Replies: 1
Views: 29

Ligand Charge

How do we determine the charge of a ligand in a coordination compound (in order to find the oxidation number of the metal).
Ex. For , how would we know the charge of NH3?
by Jasmine Reddy DIS 1E
Sun Dec 02, 2018 6:24 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic and Covalent Character
Replies: 3
Views: 64

Ionic and Covalent Character

How do you determine which (covalently-bonded) molecule will have more ionic character?

How do you determine which (ionic compound) will have more covalent character?
by Jasmine Reddy DIS 1E
Sun Dec 02, 2018 3:28 pm
Forum: Trends in The Periodic Table
Topic: Ionization Energy and Electron Affinity Trend Exceptions
Replies: 2
Views: 70

Ionization Energy and Electron Affinity Trend Exceptions

What are the relative ionization energies and electron affinities of C, N, O, and F? Why?


Are there any other ionization energy or electron affinity trend exceptions?
by Jasmine Reddy DIS 1E
Mon Nov 26, 2018 3:46 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Size of Atom and Strength of Attractive/Intermolecular Forces
Replies: 1
Views: 55

Size of Atom and Strength of Attractive/Intermolecular Forces

Why does a larger atom have stronger intermolecular forces?
Also, when we refer to the size of an atom, are we referring to its molecular mass, atomic number, or atomic radius?
by Jasmine Reddy DIS 1E
Mon Nov 26, 2018 3:44 pm
Forum: Bond Lengths & Energies
Topic: Atom Size and Bond Strength
Replies: 2
Views: 50

Atom Size and Bond Strength

Why does a larger atom result in a weaker bond?
Also, when we refer to the size of an atom, are we referring to its molecular mass, atomic number, or atomic radius?
by Jasmine Reddy DIS 1E
Sun Nov 18, 2018 10:57 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Position of Lone Pairs in H20
Replies: 3
Views: 43

Position of Lone Pairs in H20

If lone pair-lone pair repulsion is the strongest, and lone pairs want to maximize the distance between themselves, then why in H20 are the two lone pairs next to each other on the oxygen (resulting in a bent shape), as opposed to one pair being on top of the oxygen, and one pair being below the oxy...
by Jasmine Reddy DIS 1E
Tue Nov 13, 2018 7:32 pm
Forum: Dipole Moments
Topic: Determining Intermolecular Forces
Replies: 5
Views: 84

Determining Intermolecular Forces

Is there a way to determine which intermolecular forces will occur between certain molecules solely by looking at the chemical equation (without drawing the lewis structure)? For example, would you be able to tell which intermolecular forces would occur between H2SeO4 molecules without drawing the l...
by Jasmine Reddy DIS 1E
Tue Nov 13, 2018 7:11 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lowest Energy Lewis Structures
Replies: 3
Views: 38

Lowest Energy Lewis Structures

When using the Lewis Structure of a molecule to determine the molecular shape, should we use the lowest energy Lewis Structure by checking formal charges, and using the octet exceptions (expanded octet, etc.) when necessary?
by Jasmine Reddy DIS 1E
Wed Nov 07, 2018 5:20 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Effect of Size of Atom/Molecule on Distortion
Replies: 2
Views: 55

Effect of Size of Atom/Molecule on Distortion

What measurement are we using to compare the sizes of atoms/molecules? (ex. molar mass, atomic radius, atomic number, number of electrons)

How does size of an atom/molecule affect distortion?
by Jasmine Reddy DIS 1E
Fri Nov 02, 2018 3:54 pm
Forum: Ionic & Covalent Bonds
Topic: Non-polar and Polar Covalent Bonds
Replies: 3
Views: 46

Non-polar and Polar Covalent Bonds

In chemistry, how do we distinguish between non-polar and polar covalent bonds?

I remember learning that a C-H bond is non-polar, even though Carbon and Hydrogen don't have the same electronegativities.
by Jasmine Reddy DIS 1E
Fri Nov 02, 2018 3:51 pm
Forum: Trends in The Periodic Table
Topic: Oxidation Number
Replies: 1
Views: 37

Oxidation Number

How do you find the maximum positive and negative oxidation number for an element?
by Jasmine Reddy DIS 1E
Thu Nov 01, 2018 10:21 pm
Forum: Octet Exceptions
Topic: H, He, Li, Be Rule
Replies: 3
Views: 51

Re: H, He, Li, Be Rule

As others have said, hydrogen, helium, lithium, and beryllium only have s subshells. Each s subshell can only hold 2 e-. These elements do not have the p subshells required to hold 8 valence e-.
by Jasmine Reddy DIS 1E
Tue Oct 30, 2018 2:29 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 3d and 4s: filling and energy
Replies: 1
Views: 55

3d and 4s: filling and energy

Why is 4s filled with electrons before 3d?

Then, why does 4s have higher energy than 3d once it is filled?
by Jasmine Reddy DIS 1E
Tue Oct 30, 2018 1:47 pm
Forum: Octet Exceptions
Topic: Expanded Octet Circumstances
Replies: 1
Views: 81

Expanded Octet Circumstances

Which elements can form expanded octets? Why can these elements form expanded octets?

In what circumstances do the elements that are capable of having expanded octets form expanded octets? (Aren't elements most stable with 8 valence electrons?)
by Jasmine Reddy DIS 1E
Wed Oct 24, 2018 3:03 pm
Forum: Trends in The Periodic Table
Topic: Removing 2nd Electron
Replies: 9
Views: 121

Removing 2nd Electron

Why is it harder to remove a second electron from an atom (higher ionization energy)?
by Jasmine Reddy DIS 1E
Mon Oct 22, 2018 9:38 pm
Forum: Quantum Numbers and The H-Atom
Topic: Magnetic Quantum Number
Replies: 3
Views: 49

Magnetic Quantum Number

Given the magnetic quantum number, what information can we directly deduce about an orbital?
by Jasmine Reddy DIS 1E
Mon Oct 22, 2018 9:36 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Significance of XYZ to PDF orbitals
Replies: 6
Views: 107

Significance of XYZ to PDF orbitals

Why are P, D, F orbitals distinguished with X, Y, and Z (ex. Px, Py, Pz, Dxy, Dyz, etc.)? Is it just to show what axis the orbitals and lobes are located along?
by Jasmine Reddy DIS 1E
Mon Oct 22, 2018 9:31 pm
Forum: Properties of Electrons
Topic: Effective Nuclear Charge
Replies: 1
Views: 103

Effective Nuclear Charge

I know that effective nuclear charge relates to electron shielding, but what is it exactly? How does it relate to Coulomb's law?
by Jasmine Reddy DIS 1E
Mon Oct 22, 2018 9:26 pm
Forum: Properties of Light
Topic: SI Units
Replies: 6
Views: 138

Re: SI Units

I would also recommend knowing how to convert from g to kg, as kg is the SI unit for mass.
by Jasmine Reddy DIS 1E
Mon Oct 22, 2018 12:11 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Value of Delta X
Replies: 8
Views: 182

Value of Delta X

For our purposes, will the value of delta X always be the diameter of the atom?
by Jasmine Reddy DIS 1E
Fri Oct 12, 2018 10:33 pm
Forum: Properties of Electrons
Topic: Free vs. Bound Electrons
Replies: 6
Views: 79

Free vs. Bound Electrons

What is the difference between free and bound electrons?
by Jasmine Reddy DIS 1E
Fri Oct 12, 2018 10:28 pm
Forum: Photoelectric Effect
Topic: Properties of Light
Replies: 5
Views: 62

Properties of Light

How is the intensity of a wave/light source measured?

Also, for our purposes, how are we defining "energy"?
by Jasmine Reddy DIS 1E
Fri Oct 12, 2018 9:44 pm
Forum: Significant Figures
Topic: All students read this sig fig post [ENDORSED]
Replies: 90
Views: 7740

Re: All students read this sig fig post [ENDORSED]

When taking values from the periodic table (ex. for calculating molar mass), how many significant figures do you round to?
by Jasmine Reddy DIS 1E
Tue Oct 02, 2018 1:26 pm
Forum: Empirical & Molecular Formulas
Topic: Correct Answer for Audio-Visual Focus-Topics Empirical and Molecular Formulas Pre-Module Assessment
Replies: 3
Views: 50

Correct Answer for Audio-Visual Focus-Topics Empirical and Molecular Formulas Pre-Module Assessment

What is the correct answer for #14?
#14.
339.20 g of a cobalt metal is reacted with fluorine gas to produce 996.08 g of a compound. What is the empirical formula of the new compound?


How can we find the correct answers for the pre/post assessments?
by Jasmine Reddy DIS 1E
Tue Oct 02, 2018 1:19 pm
Forum: Balancing Chemical Reactions
Topic: Audio Visual Focus Topics Balancing Chemical Equations Pre Assessment
Replies: 2
Views: 56

Audio Visual Focus Topics Balancing Chemical Equations Pre Assessment

Question #17 states, "During a summer camping weekend 4 moles of butane (C4H10) gas were used for cooking. Chose the right balanced equation for the combustion of 4 moles of butane gas. What is the net number of moles of gas produced?" How do you calculate the net number of moles of gas pr...
by Jasmine Reddy DIS 1E
Tue Oct 02, 2018 1:14 pm
Forum: Empirical & Molecular Formulas
Topic: Audio Visual Focus Topic Empirical and Molecular Formulas Pre-Assessment
Replies: 2
Views: 54

Audio Visual Focus Topic Empirical and Molecular Formulas Pre-Assessment

Question 14 on the Empirical and Molecular Formulas pre-test states, "If vitamin C is 40.9% C, 4.58% H, and 54.5% O what is its empirical formula?"
Are these percentages referring to mass percentage of each element within vitamin C?

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