Search found 35 matches

by Bao Tram Nguyen
Sun Dec 01, 2019 9:16 pm
Forum: Naming
Topic: Prefixes and Suffixes
Replies: 1
Views: 12

Prefixes and Suffixes

what are the important prefixes and suffixes for naming?
by Bao Tram Nguyen
Sun Dec 01, 2019 9:15 pm
Forum: *Molecular Orbital Theory Applied To Transition Metals
Topic: Transition metals
Replies: 4
Views: 13

Transition metals

what are transition metals? can i get some examples as well?
by Bao Tram Nguyen
Sun Dec 01, 2019 9:15 pm
Forum: *Molecular Orbital Theory Applied To Transition Metals
Topic: MO Theory
Replies: 1
Views: 18

MO Theory

How does it apply to transition metals?
by Bao Tram Nguyen
Sun Dec 01, 2019 9:14 pm
Forum: *Molecular Orbital Theory Applied To Transition Metals
Topic: Molecular Orbital Theory
Replies: 1
Views: 17

Molecular Orbital Theory

Can someone briefly explain the MO theory?
by Bao Tram Nguyen
Sun Dec 01, 2019 9:11 pm
Forum: Lewis Acids & Bases
Topic: Weak vs. Strong
Replies: 8
Views: 31

Weak vs. Strong

In class, Professor Lavelle mentioned weak vs strong acids and bases. Can someone explain the difference between them?
by Bao Tram Nguyen
Sun Dec 01, 2019 9:10 pm
Forum: Air Pollution & Acid Rain
Topic: Formation of Acid Rain
Replies: 3
Views: 32

Formation of Acid Rain

How is acid rain produced chemically?
by Bao Tram Nguyen
Thu Nov 14, 2019 7:21 pm
Forum: Dipole Moments
Topic: Molecular Structure
Replies: 2
Views: 9

Molecular Structure

Do dipole moments affect molecular structures?
by Bao Tram Nguyen
Thu Nov 14, 2019 7:20 pm
Forum: Dipole Moments
Topic: Test 2
Replies: 3
Views: 30

Test 2

Will Dipole moments be tested on test 2 next week?
by Bao Tram Nguyen
Thu Nov 14, 2019 7:19 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Prefixes
Replies: 2
Views: 33

Prefixes

So for some homework problems, they only give you the name of the molecules and not the actual formula. Would this be the case on exams as well because I am stuck having to look up these molecules to find the formulas? Would you recommend me memorizing the prefixes that determine the number of atoms...
by Bao Tram Nguyen
Thu Nov 14, 2019 7:15 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR Formula
Replies: 2
Views: 18

VSEPR Formula

When a question asks for the VSEPR formula, is it asking for you to identify the number of lone and bonded electron pairs?
by Bao Tram Nguyen
Thu Nov 14, 2019 7:14 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Trigonal Pyramid vs Trigonal Planar
Replies: 6
Views: 30

Trigonal Pyramid vs Trigonal Planar

Is there a difference between these two shapes and if you were to put one or the other on the exam, would it affect our grade?
by Bao Tram Nguyen
Thu Nov 14, 2019 7:12 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2E.7
Replies: 2
Views: 19

2E.7

For part B, it asks for the number of O-S-Cl bonds and would the correct answer be 2? The solution manual does not provide an exact number.
by Bao Tram Nguyen
Sun Nov 10, 2019 9:54 pm
Forum: Electronegativity
Topic: Atom size
Replies: 16
Views: 123

Atom size

What happens to the size of an atom as the electronegativity increases and decreases? Does it actually effect atom size?
by Bao Tram Nguyen
Sun Nov 10, 2019 9:53 pm
Forum: Electronegativity
Topic: Electron affinity
Replies: 6
Views: 22

Electron affinity

Is electron negativity and electron affinity the same thing? And which direction does it increase on the periodic table?
by Bao Tram Nguyen
Sun Nov 10, 2019 9:52 pm
Forum: Dipole Moments
Topic: Dipole moments
Replies: 3
Views: 26

Dipole moments

Can someone clarify what a dipole moment is? I know it has to do with the polarity of the atoms in a molecule but please clarify for me thanks
by Bao Tram Nguyen
Sun Nov 10, 2019 9:51 pm
Forum: Coordinate Covalent Bonds
Topic: Coordinate covalent bonds
Replies: 7
Views: 42

Coordinate covalent bonds

What is the difference between a regular vs a coordinate covalent bond and how do you show that it's a coordinate bond?
by Bao Tram Nguyen
Sun Nov 10, 2019 9:50 pm
Forum: Resonance Structures
Topic: Drawing Resonance Structures
Replies: 3
Views: 32

Drawing Resonance Structures

When a question asks you to draw the resonance structure for the molecule, does that mean you have to draw every possibility of the bonds? What are you suppose to do?
by Bao Tram Nguyen
Sun Nov 10, 2019 9:48 pm
Forum: Sigma & Pi Bonds
Topic: Sigma vs Pi
Replies: 11
Views: 40

Sigma vs Pi

What is the difference between these two bonds and why are they significant?
by Bao Tram Nguyen
Tue Nov 05, 2019 4:46 pm
Forum: Einstein Equation
Topic: Rydberg Equation
Replies: 1
Views: 36

Re: Rydberg Equation

I would say not to use this equation because he doesn’t like it. Instead use: E= ((-hR)/(n2)^2)-((-hR)/(n1)^2) and then get whatever you’re looking for alone. However this will only work for the Hydrogen atom so read the question carefully before starting. Hope this helps (:
by Bao Tram Nguyen
Sun Oct 27, 2019 1:11 am
Forum: Lewis Structures
Topic: Drawing the structure
Replies: 7
Views: 44

Drawing the structure

So in class on friday we talked about how to draw a structure for CH5 and it looked like a pentagon with a circle inside it. Would count as a lewis structure or what would you call it?
by Bao Tram Nguyen
Sun Oct 27, 2019 1:04 am
Forum: Ionic & Covalent Bonds
Topic: Double bond placement
Replies: 15
Views: 83

Re: Double bond placement

You can basically put them anywhere as long as they satisfy the octet rule (there are some elements that are exceptions to this because they have an expanded octet) meaning they have 8 valence electrons in the outer most shell after bonding with other atoms
by Bao Tram Nguyen
Sun Oct 27, 2019 1:01 am
Forum: Resonance Structures
Topic: Resonance
Replies: 4
Views: 25

Resonance

When does a substance have resonance?
by Bao Tram Nguyen
Sun Oct 27, 2019 1:00 am
Forum: Octet Exceptions
Topic: Exceptions
Replies: 10
Views: 403

Re: Exceptions

If the element has an empty d orbital, then it can expand, which causes it to have more than 8 electrons in the valence shell. These elements can be found in the 3rd period of the p block
by Bao Tram Nguyen
Sun Oct 27, 2019 12:55 am
Forum: Sigma & Pi Bonds
Topic: Sigma vs. Pi
Replies: 11
Views: 506

Re: Sigma vs. Pi

The first bond will always be a sigma bond and any bond after will be a pi bond
by Bao Tram Nguyen
Sun Oct 27, 2019 12:53 am
Forum: Lewis Structures
Topic: Drawing Lewis Structure
Replies: 6
Views: 32

Drawing Lewis Structure

I know that the octet rule is important when drawing a lewis structure but is it always necessary to draw the dots for the electrons on each element or can it be inferred that it fulfills the octet rule?
by Bao Tram Nguyen
Fri Oct 11, 2019 7:14 pm
Forum: Quantum Numbers and The H-Atom
Topic: Help with 1A. 11
Replies: 1
Views: 16

Help with 1A. 11

Can anyone explain the answer to me? I have no idea what to say. Is it because the lines are around the same energy level for the electrons?
by Bao Tram Nguyen
Fri Oct 11, 2019 7:08 pm
Forum: Properties of Electrons
Topic: where does it travel
Replies: 2
Views: 20

where does it travel

so someone told me that the electrons travel on or follow the wavelength. can someone clarify if that's true or not?
by Bao Tram Nguyen
Fri Oct 11, 2019 7:07 pm
Forum: Properties of Light
Topic: Wavelength
Replies: 4
Views: 31

Wavelength

does the amplitude of a wavelength ever come into play? is it something that's important and in which cases?
by Bao Tram Nguyen
Fri Oct 11, 2019 7:05 pm
Forum: Properties of Light
Topic: Frequency vs. Wavelength
Replies: 15
Views: 73

Frequency vs. Wavelength

what is the relationship between the frequency and the wavelength? is frequency the number of wave cycles per second and wavelength is basically the distance of each cycle?
by Bao Tram Nguyen
Tue Oct 08, 2019 6:54 pm
Forum: Properties of Electrons
Topic: Kinetic Energy
Replies: 4
Views: 47

Kinetic Energy

What happens to the kinetic energy in Ek=(1/2)Me-Ve-^2 if we were to increase the frequency or intensity of the electrons? Or when does the kinetic energy change, if it changes at all.
by Bao Tram Nguyen
Sat Oct 05, 2019 5:29 pm
Forum: Limiting Reactant Calculations
Topic: Temperature Effect on Reactions
Replies: 2
Views: 26

Re: Temperature Effect on Reactions

In real life, yes, the temperature will determine if the reaction goes to completion. If the temperature doesn’t reach the point that you need it to be for the reaction to work then some compounds might not react to what you add in the solution.
by Bao Tram Nguyen
Sat Oct 05, 2019 5:27 pm
Forum: Balancing Chemical Reactions
Topic: Homework H.7
Replies: 2
Views: 32

Re: Homework H.7

First balance the hydrogen atoms in the reaction: 2 NH3 + O2 —> 3 H2O + NO2 Then balance the nitrogens: 2 NH3 + O2 —> 3 H2O + 2 NO2 And lastly, balance the oxygens. You never want to balance it first because you don’t want to balance an element that is alone. It will be harder to work around the oth...
by Bao Tram Nguyen
Sat Oct 05, 2019 5:17 pm
Forum: Molarity, Solutions, Dilutions
Topic: Homework Question G13
Replies: 2
Views: 22

Re: Homework Question G13

Shouldn’t it be .100L because of sig figs instead of .1L?
by Bao Tram Nguyen
Sat Oct 05, 2019 5:14 pm
Forum: SI Units, Unit Conversions
Topic: Sig figs
Replies: 5
Views: 35

Re: Sig figs

What a good question! This is where significant figures come into play. When you write 30 g, you are only allowed to use 2 significant figures to answer the question versus 30.0 g which allows you to write 3 sig figs. Also writing 30.0 g makes the measurement more precise and shows you that it is ex...
by Bao Tram Nguyen
Sat Oct 05, 2019 5:11 pm
Forum: Properties of Light
Topic: The units for Frequency
Replies: 3
Views: 19

Re: The units for Frequency

Personally I think it’s easier to just write g/mol instead of g*mol^-1. But it’s good to know both ways because not everyone writes it like that.

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