you can tell when a molecule is resonant by knowing if there are multiple ways to draw the lewis structure.
Hope this helps you :)
Search found 31 matches
- Mon Jun 11, 2018 1:03 am
- Forum: Resonance Structures
- Topic: How to tell when an molecule is resonant?
- Replies: 7
- Views: 1714
- Mon Jun 11, 2018 12:53 am
- Forum: Bond Lengths & Energies
- Topic: Bond length
- Replies: 5
- Views: 809
Re: Bond length
I believe you can tell which atom has a longer bond length by looking at how many electrons are present within the atoms.
I hope this answers your question :)
I hope this answers your question :)
- Mon Jun 11, 2018 12:48 am
- Forum: Electronegativity
- Topic: electronegativity chart
- Replies: 11
- Views: 1879
Re: electronegativity chart
I don't believe its necessary to memorize it, but its best to know that it increases from left to right.
Hope this helps :)
Hope this helps :)
- Sun Jun 03, 2018 10:19 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Benzene structure
- Replies: 2
- Views: 370
Re: Benzene structure
Hello :)
I believe since we have gone over it, we will be expected to know how to draw it. I suggest going over it just in case it may appear on the final as well.
Really hope this answers your question! :)
I believe since we have gone over it, we will be expected to know how to draw it. I suggest going over it just in case it may appear on the final as well.
Really hope this answers your question! :)
- Sun Jun 03, 2018 10:04 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Bond types
- Replies: 6
- Views: 718
Re: Bond types
Hello :)
I believe Professor Lavelle was trying to give us the overall 3-D model perspective by using dashed, and dotted lines. This gave us a clear understanding of how the model is portrayed.
I hope this helps :)
I believe Professor Lavelle was trying to give us the overall 3-D model perspective by using dashed, and dotted lines. This gave us a clear understanding of how the model is portrayed.
I hope this helps :)
- Sun Jun 03, 2018 9:53 pm
- Forum: Hybridization
- Topic: VSEPR
- Replies: 11
- Views: 1559
Re: VSEPR
Hello :)
I believe VSEPR stands for valence shell electron pair repulsion. this is usually used to predict geometry molecules.
I hope this answers your question!
I believe VSEPR stands for valence shell electron pair repulsion. this is usually used to predict geometry molecules.
I hope this answers your question!
- Sun Jun 03, 2018 9:50 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone pairs
- Replies: 7
- Views: 813
Re: Lone pairs
Hello :)
I believe the lone pair would cause the repulsion due to the distance it is from the central atom.
Really hope this helps!
I believe the lone pair would cause the repulsion due to the distance it is from the central atom.
Really hope this helps!
- Sun May 27, 2018 11:29 pm
- Forum: Octet Exceptions
- Topic: Octet Exception
- Replies: 7
- Views: 1130
Re: Octet Exception
Hello, how are you?
To answer your question, to understand which elements have an incomplete octet, there is an option to memorize them. Another way is to memorize that period 3 on the periodic table have an octet exception rule.
To answer your question, to understand which elements have an incomplete octet, there is an option to memorize them. Another way is to memorize that period 3 on the periodic table have an octet exception rule.
- Sun May 27, 2018 11:25 pm
- Forum: Octet Exceptions
- Topic: Octet Rules
- Replies: 4
- Views: 686
Re: Octet Rules
Hello :)
To answer your question, boron isn't the only element to have an incomplete octet. If you take a look at group 3 on the periodic table, those elements have incomplete octets as well.
To answer your question, boron isn't the only element to have an incomplete octet. If you take a look at group 3 on the periodic table, those elements have incomplete octets as well.
- Sun May 27, 2018 11:23 pm
- Forum: Octet Exceptions
- Topic: 3.61
- Replies: 4
- Views: 4683
Re: 3.61
Hello, I believe since iodine is the least electronegative, it is centered in the middle. Also since it is an exception to the octet rule, you can add the excess lone pairs to it.
Really hope this helps :)
Really hope this helps :)
- Sun May 20, 2018 11:17 pm
- Forum: Electronegativity
- Topic: Carbon and Sulfur electronegativity?
- Replies: 4
- Views: 14934
Re: Carbon and Sulfur electronegativity?
How I understand this concept of the periodic table is by always looking at fluorine and oxygen as the most electronegative. This could really help you decipher how the elements electronegativity's differ. I hopes this helps you! :)
- Sun May 20, 2018 11:11 pm
- Forum: Electronegativity
- Topic: Isoelectronic [ENDORSED]
- Replies: 11
- Views: 1535
Re: Isoelectronic [ENDORSED]
How I interpret atoms being isoelectronic, is the same as them both having the same chemical properties, and the same number of electrons. Really hope this is helpful :)
- Sun May 20, 2018 11:06 pm
- Forum: DeBroglie Equation
- Topic: De Broglie Wavelength on the Midterm
- Replies: 4
- Views: 726
Re: De Broglie Wavelength on the Midterm
Hello, I believe I had a similar question regarding the midterm as well. I finally realized that if you see what the question is asking, we can tell that we must use the De Broglies wavelength Equation. Really hope this helps you :)
- Sun May 13, 2018 11:16 pm
- Forum: Empirical & Molecular Formulas
- Topic: Molecular to Empirical
- Replies: 9
- Views: 1185
Re: Molecular to Empirical
In this case, I would just leave it the same. I understand your confusion regarding this topic because I had a very similar problem.
Hope this info helps! :)
Hope this info helps! :)
- Sun May 13, 2018 11:14 pm
- Forum: DeBroglie Equation
- Topic: Bohr vs Speed of Light Equation
- Replies: 3
- Views: 1234
Re: Bohr vs Speed of Light Equation
What really helps me solving problems and deciding between the bohr and the speed of light equation Is by examining what the question is asking, such as in terms of units. for example for solving for wavelength, you could use c=(lambda)(wavelength).
- Sun May 13, 2018 11:09 pm
- Forum: Properties of Light
- Topic: Test 2 Question 4
- Replies: 8
- Views: 937
Re: Test 2 Question 4
Hello, At first I assumed that you would use the ryberg equation to solve the problem, but then I realized you can just solve it by using the equation
E=hc/lamda,
Really hopes this helps :)
E=hc/lamda,
Really hopes this helps :)
- Sun May 06, 2018 11:24 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Rydberg Constant [ENDORSED]
- Replies: 6
- Views: 941
Re: Rydberg Constant [ENDORSED]
Hello:)
To answer your question, the Ryberg constant is R=3.28984 x 10^ 15 HZ.
You don't have to remember it though, because the formulas will be provided during the Midterm/Final Exam.
I hope this helps :)
To answer your question, the Ryberg constant is R=3.28984 x 10^ 15 HZ.
You don't have to remember it though, because the formulas will be provided during the Midterm/Final Exam.
I hope this helps :)
- Sun May 06, 2018 11:15 pm
- Forum: Ionic & Covalent Bonds
- Topic: Midterm Topics [ENDORSED]
- Replies: 33
- Views: 4923
Re: Midterm Topics [ENDORSED]
According to my understanding, only chapters 1 and 2 will be covered on the midterm. I remember him mentioning this in class, during his Friday lecture review.
- Sun May 06, 2018 11:09 pm
- Forum: Photoelectric Effect
- Topic: Intensity of Photon
- Replies: 8
- Views: 1017
Re: Intensity of Photon
I feel that what needs to be emphasized is the type of frequency. For example, by increasing the intensity of a photon with a long wavelength may emit little to know electrons. while on the other hand, increasing the intensity of a photon with a short wavelength will mostly like increase the amount ...
- Mon Apr 30, 2018 4:47 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Rydberg [ENDORSED]
- Replies: 4
- Views: 556
Re: Rydberg [ENDORSED]
Ive had a similar problem regarding this equation also, and I realized that removing the negative sign in general allows more a more proficient answer. Hope this helps you :)
- Mon Apr 30, 2018 4:44 pm
- Forum: DeBroglie Equation
- Topic: De Brogiles wavelength
- Replies: 4
- Views: 738
Re: De Brogiles wavelength
I think the problem here is the method of getting the mass of the element to solve for the wavelength. De Broglie's equation would definitely solve for this by using lamda=h/mv. really hope this helps :)
- Mon Apr 30, 2018 4:37 pm
- Forum: Properties of Light
- Topic: Equations for light [ENDORSED]
- Replies: 4
- Views: 594
Re: Equations for light [ENDORSED]
Yes, those are very essential equations that are needed to prepare for the test/ midterm. But Keep in mind, it depends on what the question is asking and what the given values are in order to solve It. For example, you can solve velocity by using De Broglie's equation if you have the mass, and planc...
- Sun Apr 22, 2018 11:56 pm
- Forum: DeBroglie Equation
- Topic: Wavelength= (h/p) [ENDORSED]
- Replies: 7
- Views: 1230
Re: Wavelength= (h/p) [ENDORSED]
the reason why that formula doesn't apply to light is because it doesn't contain mass. hope this answers your question :)
- Sun Apr 22, 2018 11:50 pm
- Forum: SI Units, Unit Conversions
- Topic: Avogadro #
- Replies: 9
- Views: 1198
Re: Avogadro #
I believe that Avogadro's number can be very useful when trying to do conversions in chemistry calculations. An example that can be considered is attempting to convert a calculation to particles per mole.
- Sun Apr 22, 2018 11:42 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 151635
Re: Reading the textbook
In my opinion I feel like the textbook can be very helpful when filling in gaps for chemistry topics to get more clarity. with that said, when I have difficulty understanding certain concepts that Professor Lavelle covers, I find it very useful to watch is lectures online first, and then reading the...
- Mon Apr 16, 2018 12:09 am
- Forum: Empirical & Molecular Formulas
- Topic: Molecular to Empirical
- Replies: 9
- Views: 1185
Re: Molecular to Empirical
in this case that you specifically mentioned, I advise leaving both the empirical and molecular formulas the same.
- Mon Apr 16, 2018 12:07 am
- Forum: Significant Figures
- Topic: Significant Figures When Multiplying and Dividing [ENDORSED]
- Replies: 4
- Views: 885
Re: Significant Figures When Multiplying and Dividing [ENDORSED]
Hello, there is no distinct rule for counting significant figures for both multiplication, or division. they both follow the same general pattern of sig figs.
- Mon Apr 16, 2018 12:05 am
- Forum: Properties of Light
- Topic: Wavelength [ENDORSED]
- Replies: 9
- Views: 1152
Re: Wavelength [ENDORSED]
according my studies, wavelength does not need to be at peaks, but I do believe it has to be at a very specific point.
- Sun Apr 08, 2018 11:10 pm
- Forum: Limiting Reactant Calculations
- Topic: Reactant vs. Reagent [ENDORSED]
- Replies: 23
- Views: 34785
Re: Reactant vs. Reagent [ENDORSED]
I believe reagents are substances added to a system for a chemical reaction, while a reactants are a substance consumed in a chemical reaction.
- Sun Apr 08, 2018 11:05 pm
- Forum: Significant Figures
- Topic: Why are sig figs important?
- Replies: 13
- Views: 16221
Re: Why are sig figs important?
I believe significant figures are extremely important, and they will seem very essential as you continue to use them. The reason why sig figs are so important is because it allows your calculations to be more accurate which leads to a better answer overall. I honestly feel like they are pretty essen...
- Sun Apr 08, 2018 10:55 pm
- Forum: General Science Questions
- Topic: Rusty on High School Chem [ENDORSED]
- Replies: 347
- Views: 440778
Re: Rusty on High School Chem [ENDORSED]
I believe Professor Lavelle offers many recourses to refresh the memories for high school chemistry. What I believe will be truly helpful is attending his timed office hours, and even attending a step up session to get detailed, fluent instructions on how to solve the difficult problems you are deal...