Search found 73 matches
- Fri Dec 06, 2019 7:14 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 11
- Views: 865
Formal Charge
When you calculate a formal charge and get 1- will that be a formal charge of +1 or -1 because it is an electcron?
- Fri Dec 06, 2019 7:13 pm
- Forum: Bond Lengths & Energies
- Topic: Pi and Sigma Bonds and their affect on energy
- Replies: 3
- Views: 408
Re: Pi and Sigma Bonds and their affect on energy
Thanks- I was also confused on this topic.
- Fri Dec 06, 2019 7:13 pm
- Forum: Air Pollution & Acid Rain
- Topic: final?
- Replies: 5
- Views: 541
Re: final?
What lecture did we go over this for fall 2019 quarter?
- Fri Dec 06, 2019 7:12 pm
- Forum: Conjugate Acids & Bases
- Topic: how to figure out?
- Replies: 12
- Views: 727
Re: how to figure out?
When you add a H+ to a base then it becomes a conjugate acid and vice versa.
- Fri Dec 06, 2019 7:11 pm
- Forum: Dipole Moments
- Topic: Dipole Moment
- Replies: 10
- Views: 873
Re: Dipole Moment
Does Dipole Moments indicate polarity also?
- Fri Dec 06, 2019 7:11 pm
- Forum: Naming
- Topic: Naming Cont
- Replies: 3
- Views: 257
Naming Cont
How do we know which compound goes first and last when naming?
- Mon Nov 25, 2019 7:53 pm
- Forum: Bond Lengths & Energies
- Topic: Boiling point
- Replies: 11
- Views: 1201
Re: Boiling point
Molar mass and boiling point are positivley correlated.
- Mon Nov 25, 2019 7:52 pm
- Forum: Ionic & Covalent Bonds
- Topic: Intra vs Inter molecular forces
- Replies: 7
- Views: 1429
Intra vs Inter molecular forces
Hello
Can someone explain the difference between intra and intermolecular forces and what forces would go under each one?
Thanks
Can someone explain the difference between intra and intermolecular forces and what forces would go under each one?
Thanks
- Mon Nov 25, 2019 7:51 pm
- Forum: Dipole Moments
- Topic: Dipole Moment
- Replies: 10
- Views: 873
Re: Dipole Moment
Can an individual molecule be dipole- dipole. Or would we just say that this is a dipole moment within 1 molecule?
- Mon Nov 25, 2019 7:37 pm
- Forum: *Crystal Field Theory
- Topic: Crystal Field Theory
- Replies: 5
- Views: 1759
Re: Crystal Field Theory
I dont remember ever hearing about this so I dont think we need to know it for the final.
- Mon Nov 25, 2019 7:35 pm
- Forum: Naming
- Topic: Naming for Final
- Replies: 3
- Views: 227
Naming for Final
What will we need to know for the final for this outline. I dont think we covered it that much in class?
- Fri Nov 22, 2019 4:09 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Notation used in VSEPR
- Replies: 8
- Views: 587
Re: Notation used in VSEPR
Rebekah Alfred 1L wrote:Katherine Brenner 3H wrote:Can someone explain how we get that formula?
For example, NH3 will have a VSEPR formula of AX3E because it has three bonded atoms and one lone pair. CH3Cl will have a VSEPR formula of AX4 because it has four bonded atoms and no lone pairs.
Thanks!
- Fri Nov 22, 2019 4:08 pm
- Forum: Bond Lengths & Energies
- Topic: Dissociation Bond Length
- Replies: 3
- Views: 495
Dissociation Bond Length
Will we ever be asked to calculate the dissociated bond length(it is inside textbook but I dont remember it from class)?
Re: Naming
Anyone have a tip for how to memorize all of these compounds!
- Fri Nov 22, 2019 4:07 pm
- Forum: *Shrodinger Equation
- Topic: Midterm
- Replies: 14
- Views: 1090
Re: Midterm
Will we ever have to calculate the full shrodinger equation for a test?
- Fri Nov 22, 2019 4:06 pm
- Forum: *Particle in a Box
- Topic: TEST 2
- Replies: 14
- Views: 1390
Re: TEST 2
Do we need to know anything about this equation(particle in a box) for the final? I dont remeber covering this topic in class nor was it on the midterm.
- Fri Nov 22, 2019 4:05 pm
- Forum: Hybridization
- Topic: hybridizing d orbitals
- Replies: 7
- Views: 452
Re: hybridizing d orbitals
How do we know when something has a 2 in front of it? IE 2dsp^2
- Fri Nov 22, 2019 4:04 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarity and melting and boiling points
- Replies: 3
- Views: 543
Polarity and melting and boiling points
Could someone explain the relationship between polarity and melting and boiling points?
Thanks
Thanks
- Fri Nov 15, 2019 7:57 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: varying VSEPRs
- Replies: 7
- Views: 475
Re: varying VSEPRs
The shape will not vary because we use the most stable molecule.
- Fri Nov 15, 2019 7:57 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Notation used in VSEPR
- Replies: 8
- Views: 587
Re: Notation used in VSEPR
Can someone explain how we get that formula?
- Fri Nov 15, 2019 7:56 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR SHAPES
- Replies: 1
- Views: 210
VSEPR SHAPES
Could some please write out the different kinds of shapes in the VSEPR and how many bonds and lone pairs that accompany it.
- Fri Nov 15, 2019 7:54 pm
- Forum: Dipole Moments
- Topic: Hydrogen bonds
- Replies: 17
- Views: 818
Re: Hydrogen bonds
Hydrogen bonds are when a hydrogen bonds with a Nitrogen, Oxygen, or Fluorine.
- Fri Nov 15, 2019 7:53 pm
- Forum: Octet Exceptions
- Topic: Octet Exception
- Replies: 8
- Views: 604
Re: Octet Exception
There is a couple exceptions including some with an expanded octet like Phosphorus and Sulfur. Also other elements have a smaller octect like Hydrogen.
- Fri Nov 15, 2019 7:52 pm
- Forum: Dipole Moments
- Topic: Do lone pairs repel more?
- Replies: 5
- Views: 279
Re: Do lone pairs repel more?
Yes lone pairs do repel more :)
- Fri Nov 15, 2019 7:51 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 7
- Views: 476
Re: Formal Charge
It is important to know that you will only be calculating the formal charge of one element at a time. I made this mistake for a while and it confused me :)
- Thu Nov 07, 2019 8:32 am
- Forum: Electronegativity
- Topic: Trend of Electronegativity
- Replies: 22
- Views: 2126
Re: Trend of Electronegativity
I think of the trend going in a diagonal arrow up to the upper right side. Toward Flourine.
- Thu Nov 07, 2019 8:30 am
- Forum: Hybridization
- Topic: Pi bonds
- Replies: 8
- Views: 992
Re: Pi bonds
When you have a double bond, you have 2 pi bonds and 1 sigma bond. When you find the hybridization level, you only count the the number of sigma bonds or hybrid bonds.
- Tue Nov 05, 2019 10:30 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Midterm
- Replies: 6
- Views: 528
Re: Midterm
I think that we will be asked about certain concepts regarding the midterm because the ones he showed in class from last years midterm had a lot of conceptual questions as well as calculations.
- Tue Nov 05, 2019 10:29 pm
- Forum: DeBroglie Equation
- Topic: De Broglie Wavelength
- Replies: 23
- Views: 3433
Re: De Broglie Wavelength
I believe that everything larger than 10^-12 is a detectable way.
- Tue Nov 05, 2019 10:27 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Rydberg equation [ENDORSED]
- Replies: 73
- Views: 9061
Re: Rydberg equation [ENDORSED]
I would just watch the video module on our class website for this. It is about 1 hr long but super helpful in understanding how to do the calculations and understanding of the concept as well.
- Tue Nov 05, 2019 10:26 pm
- Forum: Resonance Structures
- Topic: Formal charge and resonance
- Replies: 5
- Views: 202
Re: Formal charge and resonance
I believe that resonance structures normally have the same formal charges.
- Tue Nov 05, 2019 10:24 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Polarizability and Covalent Character
- Replies: 5
- Views: 385
Re: Polarizability and Covalent Character
I believe that polarizability refers to the ability to be able to easily loose or gain electrons. Is this correct?
- Tue Nov 05, 2019 10:23 pm
- Forum: Dipole Moments
- Topic: Dipole, midterm?
- Replies: 7
- Views: 506
Re: Dipole, midterm?
Can someone breifly explain what we will be expected to know about dipoles on our midterm?
- Tue Nov 05, 2019 10:23 pm
- Forum: Octet Exceptions
- Topic: Easy way to remember octet exceptions
- Replies: 4
- Views: 380
Easy way to remember octet exceptions
Hello
Is there any easy way to remember the octet exceptions?
Is there any easy way to remember the octet exceptions?
- Fri Nov 01, 2019 5:20 pm
- Forum: Properties of Electrons
- Topic: Speed of electromagnetic radiation
- Replies: 2
- Views: 337
Speed of electromagnetic radiation
Is the speed of electromagnetic radiation always constant?- even when frequency decreases or wavelength decreases?
- Fri Nov 01, 2019 3:30 pm
- Forum: Ionic & Covalent Bonds
- Topic: Valence Electrons?
- Replies: 15
- Views: 1029
Re: Valence Electrons?
Can someone describe the difference for the number of valence electrons in different metals/nonmetals and in the akalines?
- Fri Nov 01, 2019 3:28 pm
- Forum: Administrative Questions and Class Announcements
- Topic: 10/28 Updates due to Fire [ENDORSED]
- Replies: 14
- Views: 1908
Re: 10/28 Updates due to Fire [ENDORSED]
Does anyone know when the midterm review sessions are for next week? ( week of midterm).
- Fri Nov 01, 2019 3:28 pm
- Forum: Properties of Light
- Topic: Midterm Exam
- Replies: 21
- Views: 680
Re: Midterm Exam
Is anyone in a study group that I could join for the midterm exam? It could be helpful to have peer input when trying to study for the midterm.
- Fri Nov 01, 2019 3:26 pm
- Forum: Trends in The Periodic Table
- Topic: Studying techniques
- Replies: 3
- Views: 152
Studying techniques
Does anyone have any easy to remember studying techniques for remembering trends in the periodic table?
- Fri Nov 01, 2019 3:25 pm
- Forum: Lewis Structures
- Topic: Lone Pairs
- Replies: 10
- Views: 456
Re: Lone Pairs
Will you have lone pairs during an ionic bond?
- Fri Nov 01, 2019 3:23 pm
- Forum: Octet Exceptions
- Topic: Octet Exception
- Replies: 5
- Views: 282
Octet Exception
What elements are an exception to the octet rule?
- Fri Oct 25, 2019 11:12 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 4
- Views: 205
Re: Formal Charge
Does anyone know where we could find an example of this in the textbook (please post a page number if possible)?
Thanks
Thanks
- Fri Oct 25, 2019 11:11 pm
- Forum: Lewis Structures
- Topic: Denoting charge on ions
- Replies: 2
- Views: 116
Re: Denoting charge on ions
I believe that this is more for formatting reasons. I think that this helps separate the element from the electrons count. Also, keep in mind that noble gases are also bracketed.
- Fri Oct 25, 2019 11:09 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Calculating Subshells
- Replies: 3
- Views: 148
Re: Calculating Subshells
Would someone mind breaking down the steps to calculating subshells because i am seeming to have difficultly with it?
Thanks
Thanks
- Fri Oct 25, 2019 11:08 pm
- Forum: Electronegativity
- Topic: Nonmetals?
- Replies: 6
- Views: 744
Re: Nonmetals?
The answer to both of your questions are yes- nonmetals are closer to acheiving and octet. This is because of this position on the periodic table.
- Fri Oct 25, 2019 11:06 pm
- Forum: Ionic & Covalent Bonds
- Topic: Meaning of Brackets
- Replies: 7
- Views: 371
Re: Meaning of Brackets
Brackets indicates something is a noble gas. I was originally confused on this as well so dont worry!
- Thu Oct 17, 2019 8:43 am
- Forum: Einstein Equation
- Topic: Equations and their purpose
- Replies: 3
- Views: 255
Re: Equations and their purpose
Same Haley!
Thank you so much to everyone who responded because now it makes sense.
Thank you so much to everyone who responded because now it makes sense.
- Tue Oct 15, 2019 8:56 am
- Forum: Quantum Numbers and The H-Atom
- Topic: Atomic Spectra!!
- Replies: 2
- Views: 100
Re: Atomic Spectra!!
How do we tell what level an electron typically ends up in? (IE n=1, n=3)
- Tue Oct 15, 2019 8:55 am
- Forum: Trends in The Periodic Table
- Topic: Atomic Radius
- Replies: 16
- Views: 951
Re: Atomic Radius
Could someone explain when an electron will move up to an excited energy state?
- Tue Oct 15, 2019 8:52 am
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Wavelength Plausibility
- Replies: 31
- Views: 2690
Re: Wavelength Plausibility
Does that mean that the larger an electrons wavelength is, the more wave-like properties it possesses?
- Tue Oct 15, 2019 8:49 am
- Forum: Photoelectric Effect
- Topic: Threshold and activation energy
- Replies: 3
- Views: 218
Re: Threshold and activation energy
So a molecule uses activation energy to start making collisions but runs out of energy and thus uses threshold energy?
- Tue Oct 15, 2019 8:47 am
- Forum: Properties of Light
- Topic: Quantum Unit length
- Replies: 2
- Views: 104
Re: Quantum Unit length
I believe the Quantum world is a long unit- that what Proff said in lecture on the first day. I think this chapter will last until next week.
- Tue Oct 15, 2019 8:43 am
- Forum: Photoelectric Effect
- Topic: Question about Energy Threshold
- Replies: 7
- Views: 244
Re: Question about Energy Threshold
If there is not enough energy to bounce the electron off the metal surface, then the photoelectric effect will not happen.
- Tue Oct 15, 2019 8:40 am
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Indeterminancy In Class
- Replies: 7
- Views: 254
Re: Indeterminancy In Class
Hello
He just went over this last Monday. We just need to understand the equation and have a general idea of the characteristics and ideas that led to him creating the equation.
He just went over this last Monday. We just need to understand the equation and have a general idea of the characteristics and ideas that led to him creating the equation.
- Tue Oct 15, 2019 8:37 am
- Forum: Properties of Light
- Topic: Homework
- Replies: 11
- Views: 530
Re: Homework
As long as it is from the right topic then its fine. IE right now we are in "Quantum World" topic. My TA said it would be good to have a mix of different problems from different sections assigned but I think that is just prefer that way the TAs know you are doing all of the homework. Howev...
- Tue Oct 08, 2019 8:50 am
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Rounding
- Replies: 12
- Views: 878
Re: Rounding
The number of significant figs in the question is the amount we are supposed to be using in our answer. For example if the question has 1.34 grams co2 then our answer should be 3 sig figs such as 8.23 x 10^28
- Tue Oct 08, 2019 8:47 am
- Forum: Ionic & Covalent Bonds
- Topic: Ionic vs Covalent
- Replies: 32
- Views: 43740
Re: Ionic vs Covalent
It should be noted that water can weaken an ionic bond so in that case a covalent bond may be stronger.
- Tue Oct 08, 2019 8:47 am
- Forum: Ionic & Covalent Bonds
- Topic: Ionic vs Covalent
- Replies: 32
- Views: 43740
Re: Ionic vs Covalent
It should be noted that water can weaken an ionic bond so in that case a covalent bond may be stronger.
- Tue Oct 08, 2019 8:43 am
- Forum: Limiting Reactant Calculations
- Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
- Replies: 68
- Views: 6971
Re: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
Hi Nate
Dimensional analysis is the way we solve problems and use the multiplication techniques such as 21 grams 1mole/107 grams and the units cancel out.
Dimensional analysis is the way we solve problems and use the multiplication techniques such as 21 grams 1mole/107 grams and the units cancel out.
- Tue Oct 08, 2019 8:40 am
- Forum: Properties of Light
- Topic: Planck's Law
- Replies: 4
- Views: 160
Re: Planck's Law
Hello
Can someone please explain to me what Pancks law means in terms of quanta and photons. Im confused.
Can someone please explain to me what Pancks law means in terms of quanta and photons. Im confused.
- Tue Oct 08, 2019 8:39 am
- Forum: Einstein Equation
- Topic: Wavelengths
- Replies: 5
- Views: 358
Re: Wavelengths
Hello
This was the same problem Dr. Lavelle worked out in class. wavelength= hc/E is the equation he used in class by rearranging E=hv
This was the same problem Dr. Lavelle worked out in class. wavelength= hc/E is the equation he used in class by rearranging E=hv
- Tue Oct 08, 2019 8:33 am
- Forum: Properties of Light
- Topic: Light intensity
- Replies: 10
- Views: 412
Re: Light intensity
I am also confused on the correlation between light intensity and frequency. Would someone mind explaining the difference between the wave vs light model.
- Tue Oct 08, 2019 8:30 am
- Forum: Properties of Light
- Topic: Posts Per Week
- Replies: 6
- Views: 255
Re: Posts Per Week
Im pretty sure that the grades will be posted on ccle the following week.
- Tue Oct 08, 2019 8:29 am
- Forum: Ionic & Covalent Bonds
- Topic: Ionic vs Covalent
- Replies: 32
- Views: 43740
Re: Ionic vs Covalent
Ionic bonds are stronger than covalent bonds because covalent bonds share an electron.
- Tue Oct 08, 2019 8:25 am
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Test 1 [ENDORSED]
- Replies: 107
- Views: 21101
Re: Test 1 [ENDORSED]
I do not think that we need a bluebook for the exam.
- Tue Oct 08, 2019 8:23 am
- Forum: SI Units, Unit Conversions
- Topic: Test 1
- Replies: 9
- Views: 483
Re: Test 1
I think because it was assigned as HW, we should definitely know how to do it. It says on the syllabus that 1 out of 8 homework problems will be on the exam so it is important to know Molarity.
- Tue Oct 01, 2019 6:22 pm
- Forum: Empirical & Molecular Formulas
- Topic: Compound Formulas
- Replies: 2
- Views: 127
Re: Compound Formulas
I think that we will need to know the nomenclature compounds. I would not worry about this too much as we will probably use this alot in this course so we will probably know the most common ones without memorizing!
- Tue Oct 01, 2019 6:19 pm
- Forum: Limiting Reactant Calculations
- Topic: Aqueous Solutions
- Replies: 3
- Views: 93
Re: Aqueous Solutions
This is a great question. I think for the sake of this class we should probably be careful to always assume that water will be the excess reactant, although in the real scientific world that would make a lot of sense.
- Tue Oct 01, 2019 6:17 pm
- Forum: SI Units, Unit Conversions
- Topic: Calculator Question
- Replies: 13
- Views: 763
Re: Calculator Question
Just a scientific calc should be good! I dont think we will be needing anything that has to do with graphing for the exam.
- Tue Oct 01, 2019 6:14 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Dilution when it comes to percentage
- Replies: 3
- Views: 131
Re: Dilution when it comes to percentage
Im pretty sure that you could just assume 100 grams like we do when we calculate the empirical and molecular formulas.
- Tue Oct 01, 2019 6:10 pm
- Forum: Significant Figures
- Topic: Sig figs confusion
- Replies: 8
- Views: 368
Re: Sig figs confusion
Hello
I am having the same problem- Im never really sure how many sig figs to use in each question. I normally just use the amount that they give inside the question (if they give a specific number).
I am having the same problem- Im never really sure how many sig figs to use in each question. I normally just use the amount that they give inside the question (if they give a specific number).
- Tue Oct 01, 2019 6:08 pm
- Forum: Balancing Chemical Reactions
- Topic: Tips for Balancing Chemical Equations [ENDORSED]
- Replies: 14
- Views: 863
Re: Tips for Balancing Chemical Reactions [ENDORSED]
I always balance the element that comes up the least first. I have noticed that writing the amount of each element below it while I am balencing can be very helpful.
- Tue Oct 01, 2019 6:06 pm
- Forum: SI Units, Unit Conversions
- Topic: Naming Compounds?
- Replies: 10
- Views: 686
Re: Naming Compounds?
Section D is really helpful for that in the textbook. I do think that we will need to know what some of the compounds are like for nitrite. I think that as the course goes on you will become more familiar with certain compounds so there will not need to be much memorizing because we will be using th...