Search found 34 matches
- Sun Jun 10, 2018 11:38 pm
- Forum: Lewis Acids & Bases
- Topic: Acid structure
- Replies: 2
- Views: 447
Re: Acid structure
Most times an acid will start with H and end in the COOH box, but that does not happen every time.
- Sun Jun 10, 2018 11:37 pm
- Forum: Hybridization
- Topic: pi bonds and sigma bonds [ENDORSED]
- Replies: 4
- Views: 827
Re: pi bonds and sigma bonds [ENDORSED]
Every bond will have at least one sigma bond.
- Sun Jun 10, 2018 11:34 pm
- Forum: Lewis Acids & Bases
- Topic: pH
- Replies: 3
- Views: 648
Re: pH
One of the UA's said that we need to be able to come up with an example pertaining to acids and bases but would not need to identify whether a specific example such as tomato juice is an acid or base.
- Sun Jun 10, 2018 11:33 pm
- Forum: SI Units, Unit Conversions
- Topic: Sig Figs for Final
- Replies: 8
- Views: 1220
Re: Sig Figs for Final
I believe that we need to know sig figs for the final.
- Sun Jun 10, 2018 4:11 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Strong or weak acids/ bases
- Replies: 6
- Views: 2068
Re: Strong or weak acids/ bases
How do you know how well a base will ionize in water if you are just given the chemical formula?
- Sun Jun 10, 2018 4:09 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 12.49
- Replies: 3
- Views: 480
Re: 12.49
I was confused on the same question. I do not know how to solve this without the pKB terms or the Kb terms.
- Thu Jun 07, 2018 4:16 pm
- Forum: Hybridization
- Topic: Clarification
- Replies: 4
- Views: 601
Re: Clarification
yes, this is saying to apply the same concept to each one
- Thu Jun 07, 2018 4:13 pm
- Forum: Hybridization
- Topic: Hybrid Orbitals
- Replies: 3
- Views: 578
Re: Hybrid Orbitals
I believe the correct way to write this is sp3d as that is how it is often written in lecture in the solutions manual of the textbook.
- Thu Jun 07, 2018 4:10 pm
- Forum: Bond Lengths & Energies
- Topic: unit box
- Replies: 3
- Views: 633
Re: unit box
I believe this is a term he uses to explain the conversion ratios that need to be used.
- Thu Jun 07, 2018 4:08 pm
- Forum: Dipole Moments
- Topic: dipole moments
- Replies: 9
- Views: 1740
Re: dipole moments
Just to confirm - an increase in the difference between electronegativity will lead to a larger dipole?
- Mon Jun 04, 2018 12:01 am
- Forum: Lewis Structures
- Topic: Central Atom(s)
- Replies: 6
- Views: 778
Re: Central Atom(s)
It is always the atom that is least electronegative
- Mon Jun 04, 2018 12:00 am
- Forum: Properties of Light
- Topic: Memorizing formulas test 2
- Replies: 16
- Views: 1765
Re: Memorizing formulas test 2
We do not have to have the formulas memorized for the test
Re: Naming
Ion refers to a charged particle
- Mon May 21, 2018 5:06 pm
- Forum: Ionic & Covalent Bonds
- Topic: Octet rule
- Replies: 17
- Views: 2432
Re: Octet rule
What are the exceptions to the octet rule?
- Sun May 13, 2018 1:17 pm
- Forum: Trends in The Periodic Table
- Topic: Electron Affinity Exceptions
- Replies: 3
- Views: 653
Re: Electron Affinity Exceptions
Yes we do need to know the exceptions for the exam. I believe that we only need to know the exceptions in relation to the first three rows of the periodic table and not all of it.
- Sun May 13, 2018 1:16 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Switching 3d and 4s
- Replies: 6
- Views: 1285
Re: Switching 3d and 4s
The 4S orbital has higher energy than the 3D orbital, which is why you write it afterwards. Also, it is important to note that since the energy in the 4S orbital is higher, the electrons from that orbital will be removed before electrons in the 3D orbital are removed
- Sun May 13, 2018 1:13 pm
- Forum: *Shrodinger Equation
- Topic: Schrodinger Equation [ENDORSED]
- Replies: 8
- Views: 937
Re: Schrodinger Equation [ENDORSED]
This can be applied to all atoms, not just Hydrogen atoms
- Mon May 07, 2018 7:17 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect Module Question [ENDORSED]
- Replies: 5
- Views: 754
Re: Photoelectric Effect Module Question [ENDORSED]
Another question from this module:
"Model of light in the photoelectric effect needs to change from a ________ model to a ________ model."
"Model of light in the photoelectric effect needs to change from a ________ model to a ________ model."
- Mon May 07, 2018 7:09 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect
- Replies: 12
- Views: 1138
Re: Photoelectric Effect
What was the original purpose of the photoelectric effect? (module Q20)
- Mon May 07, 2018 7:03 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Problems
- Replies: 4
- Views: 643
Re: Photoelectric Problems
Does the photoelectric effect have to occur in a vacuum?
- Sun May 06, 2018 7:03 pm
- Forum: Properties of Light
- Topic: Wavelength/frequency
- Replies: 11
- Views: 1318
Re: Wavelength/frequency
It is important to note that when the wavelength increases, the electro magnetic radiation's frequency decreases. Since energy of a photon is expressed through the formula E = hv, energy of the photon must decrease since frequency decreased.
- Fri Apr 27, 2018 3:59 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Balmer and Lyman Series
- Replies: 9
- Views: 1519
Re: Balmer and Lyman Series
Yes we need to know the different energy levels for the balmer (n=2) and lyman (n=1) series. I think that it is also important to know that there are only 7 different energy levels.
- Fri Apr 27, 2018 3:57 pm
- Forum: Photoelectric Effect
- Topic: Work Function
- Replies: 4
- Views: 1011
Re: Work Function
There could be a problem where you are given the light energy and the energy from the electrons and will have to find the work function.
- Fri Apr 27, 2018 3:55 pm
- Forum: Photoelectric Effect
- Topic: Test 2 final question [ENDORSED]
- Replies: 15
- Views: 1901
Re: Test 2 final question [ENDORSED]
there is always a one to one ration between the number of photons of light and the number of electrons that are ejected
- Sat Apr 21, 2018 12:56 pm
- Forum: Properties of Light
- Topic: still don't uderrsatnd what a photon is [ENDORSED]
- Replies: 20
- Views: 1452
Re: still don't uderrsatnd what a photon is [ENDORSED]
The best way to think of a photon is to think of it as light. It is important to note that a photon does not ever have any mass to it.
- Sat Apr 21, 2018 12:48 pm
- Forum: SI Units, Unit Conversions
- Topic: Chemical Formulas [ENDORSED]
- Replies: 11
- Views: 1019
Re: Chemical Formulas [ENDORSED]
My TA told me that we do not need to have the different formulas memorized, but need to know which formula is for electrons and which one is for a photon.
- Sat Apr 21, 2018 12:44 pm
- Forum: SI Units, Unit Conversions
- Topic: Correct Units?? [ENDORSED]
- Replies: 8
- Views: 922
Re: Correct Units?? [ENDORSED]
As stated above, it is important to always follow the units that the problem gives you. It is also important to note that certain units such as joules are given in (kg(m^2))/s^2 and that the problem will not work if you use grams in it.
- Thu Apr 12, 2018 12:35 pm
- Forum: Balancing Chemical Reactions
- Topic: Balancing equations with fractions [ENDORSED]
- Replies: 13
- Views: 1643
Re: Balancing equations with fractions [ENDORSED]
It might be easier to begin with the mole ratios in fractions, but the final answer must be given in whole numbers. Using whole numbers is important because when converting atoms needed etc. it is easiest to use whole numbers in the conversions.
- Thu Apr 12, 2018 12:33 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Which mass of oxygen should be used? [ENDORSED]
- Replies: 23
- Views: 3358
Re: Which mass of oxygen should be used? [ENDORSED]
I think that using 16 is also fine because it is close enough to the actual value. The TAs have said that they take into consideration rounding when grading the tests and exams.
- Thu Apr 12, 2018 12:30 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Which mass of oxygen should be used? [ENDORSED]
- Replies: 23
- Views: 3358
Re: Which mass of oxygen should be used? [ENDORSED]
I think that using 16 is also fine because it is close enough to the actual value. The TAs have said that they take into consideration rounding when grading the tests and exams.
- Thu Apr 12, 2018 12:28 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Using Precision and Accuracy to Solve A Problem
- Replies: 3
- Views: 504
Re: Using Precision and Accuracy to Solve A Problem
I think that it is also important to note that it is better to have high precision then high accuracy. This is because if you have high precision, then although your results will not be as accurate, you will be able to make changes to the way your experiment is run in order to eventually have high a...
- Sun Apr 08, 2018 3:26 pm
- Forum: Empirical & Molecular Formulas
- Topic: Naming compounds
- Replies: 4
- Views: 576
Re: Naming compounds
I talked to my TA about this one and she said that as the quarter progresses, you will begin to identify certain compounds and know their names. She said that there will not be questions on any of the exams or quizzes asking you to name a compound. Hope that helps!
- Sun Apr 08, 2018 3:23 pm
- Forum: Significant Figures
- Topic: Sig Figs for Hydrogen
- Replies: 2
- Views: 709
Re: Sig Figs for Hydrogen
I think that it is always best to leave the most amount of Significant Figures. It is a little bit of an annoyance, but can result in a more accurate answer.
- Sun Apr 08, 2018 3:20 pm
- Forum: Limiting Reactant Calculations
- Topic: Reactant vs. Reagent [ENDORSED]
- Replies: 23
- Views: 34796
Re: Reactant vs. Reagent [ENDORSED]
I was under the impression that the two words mean the exact same thing and are synonyms of each other.