Search found 39 matches

by DavidTabib
Sun Nov 29, 2020 8:35 pm
Forum: Coordinate Covalent Bonds
Topic: OH
Replies: 5
Views: 24

Re: OH

Since it has a negative charge it is not radical.
by DavidTabib
Sun Nov 29, 2020 8:35 pm
Forum: Coordinate Covalent Bonds
Topic: Group 13 Elements
Replies: 4
Views: 39

Re: Group 13 Elements

It is not just limited to Group 13.
by DavidTabib
Sun Nov 29, 2020 8:34 pm
Forum: Coordinate Covalent Bonds
Topic: Lewis Diagram
Replies: 5
Views: 38

Re: Lewis Diagram

No, it looks the same as a normal bond.
by DavidTabib
Sun Nov 29, 2020 8:32 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 9
Views: 42

Re: Ligands

Any atom that binds with a transition metal is considered a ligand.
by DavidTabib
Sun Nov 22, 2020 9:48 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: repulsion strength
Replies: 10
Views: 34

Re: repulsion strength

Since lone pairs occupy more volume, they cause more repulsion.
by DavidTabib
Sun Nov 22, 2020 9:47 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: memorizing VSEPR models
Replies: 13
Views: 48

Re: memorizing VSEPR models

Quizlet has really helped me, I recommend it!
by DavidTabib
Sun Nov 22, 2020 9:46 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pair E-
Replies: 47
Views: 155

Re: Lone Pair E-

Yes, they are also their own region of electron density.
by DavidTabib
Sun Nov 22, 2020 9:46 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Seesaw Shape
Replies: 8
Views: 38

Re: Seesaw Shape

Repulsion of a lone pair results in the bending of the two bonds which are no longer 90 degrees.
by DavidTabib
Sun Nov 22, 2020 9:44 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: determining molecular structure
Replies: 4
Views: 28

Re: determining molecular structure

Pretty sure spectroscopy is used but we don't need to find it ourselves for the class.
by DavidTabib
Sun Nov 22, 2020 9:43 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs and Bonding Pairs
Replies: 6
Views: 21

Re: Lone Pairs and Bonding Pairs

Lone pairs result in repulsion which causes it to not be linear.
by DavidTabib
Sun Nov 15, 2020 3:21 pm
Forum: Lewis Structures
Topic: Central atom in NH4Cl
Replies: 7
Views: 24

Re: Central atom in NH4Cl

Since it is an ionic bond, they will need to be drawn separately.
by DavidTabib
Sun Nov 15, 2020 3:19 pm
Forum: Dipole Moments
Topic: H-Bond acceptor
Replies: 9
Views: 23

Re: H-Bond acceptor

Only one of the H needs to be attached to a NOF element.
by DavidTabib
Sun Nov 15, 2020 3:18 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: increasing polarizability
Replies: 5
Views: 26

Re: increasing polarizability

Everything just said was really helpful. Basically, the bigger anions will have greater polarizability.
by DavidTabib
Sun Nov 15, 2020 3:12 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic vs Atomic Radius
Replies: 7
Views: 48

Re: Ionic vs Atomic Radius

Ya, I was confused too because of the trends, but this makes sense. Thank you!
by DavidTabib
Sun Nov 08, 2020 5:26 pm
Forum: Bond Lengths & Energies
Topic: Bond Length
Replies: 22
Views: 312

Re: Bond Length

They are experimentally found so we don't need to find it ourselves.
by DavidTabib
Sun Nov 08, 2020 5:24 pm
Forum: Lewis Structures
Topic: Expanded octet
Replies: 4
Views: 21

Re: Expanded octet

P, S, and Cl are elements that are able to have an expanded octet
by DavidTabib
Sun Nov 08, 2020 5:23 pm
Forum: Coordinate Covalent Bonds
Topic: Coordinate covalent bonds
Replies: 9
Views: 241

Re: Coordinate covalent bonds

A coordinate covalent bond is when both electrons in a bond come from the same atom.
by DavidTabib
Sun Nov 08, 2020 5:20 pm
Forum: Resonance Structures
Topic: delocalized electron energy
Replies: 3
Views: 25

Re: delocalized electron energy

I believe that they would have more energy since they are less tightly held by an atom.
by DavidTabib
Sun Nov 08, 2020 5:19 pm
Forum: Resonance Structures
Topic: resonance structures
Replies: 8
Views: 33

Re: resonance structures

Resonance structures are used when more than one structure can represent the same molecule. Also makes it more stable
by DavidTabib
Thu Nov 05, 2020 1:43 pm
Forum: Octet Exceptions
Topic: Exceptions List
Replies: 4
Views: 54

Re: Exceptions List

That video really cleared thing sup. Thank you. I find that doing more problems helps solidify my understanding and memorization of these expectations.
by DavidTabib
Sat Oct 31, 2020 5:45 pm
Forum: Electronegativity
Topic: Partial Charge
Replies: 5
Views: 195

Re: Partial Charge

Do we need to know VSEPR shapes and IMF for the exam?
by DavidTabib
Sat Oct 31, 2020 5:43 pm
Forum: Sigma & Pi Bonds
Topic: sigma and pi bonds
Replies: 27
Views: 568

Re: sigma and pi bonds

Yes, you are correct
by DavidTabib
Sat Oct 31, 2020 5:42 pm
Forum: Lewis Structures
Topic: Drawing Lewis Structures
Replies: 7
Views: 192

Re: Drawing Lewis Structures

Do we need to know the differences between using a ring or a chain on the exam?
by DavidTabib
Sat Oct 31, 2020 5:41 pm
Forum: Dipole Moments
Topic: Cancelling dipole moments
Replies: 11
Views: 249

Re: Cancelling dipole moments

Are there any exceptions to this?
by DavidTabib
Sat Oct 31, 2020 5:39 pm
Forum: Electronegativity
Topic: Electronegativity
Replies: 16
Views: 358

Re: Electronegativity

When the electronegativity is stronger, the bond length gets shorter.
by DavidTabib
Sat Oct 31, 2020 5:36 pm
Forum: Ionic & Covalent Bonds
Topic: Constants
Replies: 5
Views: 77

Re: Constants

We need to print out the formula sheet that has the constants on it.
by DavidTabib
Sat Oct 31, 2020 5:35 pm
Forum: Ionic & Covalent Bonds
Topic: Nonpolar and polar
Replies: 16
Views: 236

Re: Nonpolar and polar

Thanks for the help guys, this makes sense now!
by DavidTabib
Sat Oct 31, 2020 5:34 pm
Forum: Ionic & Covalent Bonds
Topic: Strength of bonds
Replies: 13
Views: 77

Re: Strength of bonds

I am also sure that covalent bonds are the strongest types of bonds
by DavidTabib
Sat Oct 31, 2020 5:33 pm
Forum: Ionic & Covalent Bonds
Topic: Salt
Replies: 4
Views: 35

Re: Salt

Salts are produced from a cation and an anion.
by DavidTabib
Thu Oct 22, 2020 5:52 pm
Forum: Einstein Equation
Topic: m vs nm
Replies: 66
Views: 361

Re: m vs nm

I don't think its a huge deal and the midterm is likely multiple choice, which means the answer choices will show you what to convert to.
by DavidTabib
Thu Oct 22, 2020 5:50 pm
Forum: DeBroglie Equation
Topic: Sapling Question 29
Replies: 6
Views: 51

Re: Sapling Question 29

Thanks so much, I feel like just having the equations available during the test will be a big help.
by DavidTabib
Thu Oct 22, 2020 5:48 pm
Forum: Quantum Numbers and The H-Atom
Topic: Sapling HW number 25
Replies: 3
Views: 53

Re: Sapling HW number 25

Thank you so much. This answered my question as well!
by DavidTabib
Thu Oct 22, 2020 5:46 pm
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 205
Views: 141582

Re: Rusty on High School Chem [ENDORSED]

I'm in a similar place since I haven't taken chemistry in the past 3 years. I find that youtube videos, such as Crash Course, also help me refresh and understand the concepts that may be difficult.
by DavidTabib
Thu Oct 22, 2020 5:42 pm
Forum: Student Social/Study Group
Topic: How do you study?
Replies: 19
Views: 116

Re: How do you study?

Hi Nicolette!
I find that studying with a set plan allows me to prioritize the material I review and makes sure I use my time effectively. Best of luck studying!
by DavidTabib
Fri Oct 09, 2020 4:01 pm
Forum: Limiting Reactant Calculations
Topic: Determining Limiting Reactant
Replies: 4
Views: 33

Re: Determining Limiting Reactant

Thanks so much Kayla. That really helped
by DavidTabib
Fri Oct 09, 2020 3:58 pm
Forum: Balancing Chemical Reactions
Topic: Types of Chemical Reactions
Replies: 8
Views: 83

Re: Types of Chemical Reactions

Dr. Lavelle is really good on reviewing fundamentals before learning anything more advanced so I think you should be fine without too much review
by DavidTabib
Fri Oct 09, 2020 3:55 pm
Forum: Significant Figures
Topic: Sig fig guide
Replies: 5
Views: 69

Re: Sig fig guide

These resources really helped me. Thank you so much. Great to review with :)
by DavidTabib
Fri Oct 09, 2020 3:53 pm
Forum: Empirical & Molecular Formulas
Topic: M.20
Replies: 2
Views: 35

M.20

Nicotine, a stimulant in tobacco, causes a very complex set of physiological effects in the body. It is known to have a molar mass of 162 g?mol21. When a sample of mass 0.385 g was burned, 1.072 g of carbon dioxide, 0.307 g of water, and 0.068 g of nitrogen were produced. What are the empirical and ...
by DavidTabib
Fri Oct 09, 2020 3:49 pm
Forum: Molarity, Solutions, Dilutions
Topic: Dilution/ concentration
Replies: 3
Views: 48

Re: Dilution/ concentration

I have the same question if anyone could help :)

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