Search found 104 matches

by bellaha4F
Wed Mar 11, 2020 11:50 am
Forum: *Organic Reaction Mechanisms in General
Topic: K meaning
Replies: 6
Views: 61

Re: K meaning

the constant is also on the constant sheet!
by bellaha4F
Wed Mar 11, 2020 11:49 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalysts vs. Intermediates
Replies: 8
Views: 35

Re: Catalysts vs. Intermediates

an intermediate is seen in the product side first and disappears later, while a catalyst is added first to the reactant side and than reappears later on the product side.
by bellaha4F
Wed Mar 11, 2020 11:45 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: adsorption
Replies: 2
Views: 27

adsorption

the most important thing to know about this is that it just means that the reactants sit on the surface of a catalyst rather than be absorbed, right? is there anything else we should know about adsorption?
by bellaha4F
Wed Mar 11, 2020 11:43 am
Forum: General Rate Laws
Topic: intermediates
Replies: 12
Views: 50

intermediates

intermediates should not be listed in the rate laws, right? but rather replaced with the products that the intermediates depend on?
by bellaha4F
Mon Mar 09, 2020 10:01 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Study Advice
Replies: 73
Views: 3525

Re: Study Advice

for me, lyndon's review sessions are the best and most beneficial
by bellaha4F
Sun Mar 08, 2020 4:28 pm
Forum: General Rate Laws
Topic: the variable A
Replies: 4
Views: 21

the variable A

i don't quite understand what the variable "A" in the Arrhenius Equation means (k=Ae^-Ea/RT), can someone please explain it to me, thanks!!
by bellaha4F
Sun Mar 08, 2020 4:26 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Microscopic Reversibility
Replies: 3
Views: 19

Re: Microscopic Reversibility

microscopic reversibility is when a reaction has the same intermediates (same pathway) in both the forward and reverse directions.
by bellaha4F
Wed Mar 04, 2020 7:51 pm
Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
Topic: electrolytic cells
Replies: 1
Views: 28

electrolytic cells

i'm a little confused on the whole concept of electrolysis and electrolytic cells. can someone briefly summarize main points of what we should know?
by bellaha4F
Wed Mar 04, 2020 5:53 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: standard potential of galvanic cell
Replies: 1
Views: 20

standard potential of galvanic cell

just to clarify, when using the formula Ecell=Ecathode-Eanode, when given the potential of one of the half reactions, we do NOT change the sign if its the backwards reaction right? So like if Cu 2+ + 2e --> Cu is +0.34 V, and the half reaction was Cu --> Cu 2+ + 2e, we would still use +0.34 V and no...
by bellaha4F
Mon Mar 02, 2020 5:03 pm
Forum: Administrative Questions and Class Announcements
Topic: test 2 worksheet
Replies: 3
Views: 63

test 2 worksheet

are there any worksheets for preparation for test 2? thank you!!!
by bellaha4F
Fri Feb 28, 2020 1:35 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: diamond
Replies: 4
Views: 56

diamond

can someone explain how a diamond is kinetically stable and thermodynamically unstable with respect to graphite?
by bellaha4F
Fri Feb 28, 2020 1:33 pm
Forum: General Rate Laws
Topic: rates
Replies: 1
Views: 27

rates

if a problem tells us to find the rate of a reaction, should we find the average rate or instantaneous rate? would the question specify it?
by bellaha4F
Fri Feb 28, 2020 1:21 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: finding top of your series
Replies: 3
Views: 28

finding top of your series

i'm a little confused on how to find the top of your series in a redox reaction (ie the strongest oxidizing agent in reduction). can someone please explain, thank you!
by bellaha4F
Fri Feb 28, 2020 1:13 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Galvanic Cells
Replies: 10
Views: 53

Re: Galvanic Cells

the galvanic cell will never have a negative Ecell right? because it's always a spontaneous reaction?
by bellaha4F
Fri Feb 28, 2020 1:10 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: platinum
Replies: 5
Views: 34

platinum

should we always use platinum for our cell diagram if we are not given a solid metal in the reaction?
by bellaha4F
Thu Feb 20, 2020 2:45 pm
Forum: Van't Hoff Equation
Topic: Significance of Van't Hoff Equation
Replies: 8
Views: 74

Re: Significance of Van't Hoff Equation

the van't hoff equation (assuming that delta H and delta S are constant over all temperatures), calculates the equilibrium constant (K) at different temperatures.
by bellaha4F
Thu Feb 20, 2020 2:41 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: salt bridge
Replies: 5
Views: 41

salt bridge

is the only thing we learned about salt bridges was that it allows ion transfer for the 2 solution to stay neutral? is there more information we need to know about salt bridges?
by bellaha4F
Thu Feb 20, 2020 2:38 pm
Forum: Balancing Redox Reactions
Topic: Oxidation Numbers
Replies: 5
Views: 42

Re: Oxidation Numbers

halogens are usually -1, oxygen is -2 (with exceptions), hydrogen is -1, and pure elements are 0. you can also sometimes tell by the group/charge of the element.
by bellaha4F
Thu Feb 20, 2020 2:34 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: electron motor force [ENDORSED]
Replies: 1
Views: 31

electron motor force [ENDORSED]

can someone explain to me the electron motor force and its significance?
by bellaha4F
Thu Feb 20, 2020 2:32 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: gas constant for gibbs free energy
Replies: 5
Views: 55

gas constant for gibbs free energy

when using the gas constant for the gibbs free energy equation (delta G= -RTlnK), do you always use 8.314 J/mol.K?
by bellaha4F
Sun Feb 16, 2020 12:29 pm
Forum: Ideal Gases
Topic: pv=nrt
Replies: 19
Views: 150

Re: pv=nrt

yes, and make sure to use the right gas constant for the units!
by bellaha4F
Sun Feb 16, 2020 12:28 pm
Forum: Van't Hoff Equation
Topic: What is this? [ENDORSED]
Replies: 7
Views: 101

Re: What is this? [ENDORSED]

would it be unitless since it is calculating K?
by bellaha4F
Sun Feb 16, 2020 12:24 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Delta E
Replies: 11
Views: 120

Re: Delta E

both delta e and delta u represent the change in internal energy, and i think on the constant sheet it is also used interchangeably
by bellaha4F
Sun Feb 16, 2020 12:21 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Midterm Curve
Replies: 45
Views: 384

Re: Midterm Curve

he never curves actual tests, however he changes the grading scale for the final grades. for example, if you get 50% of all the possible points in the course, you pass the class with a C-, and based on how everyone did this quarter, he will adjust the grading scale accordingly.
by bellaha4F
Wed Feb 12, 2020 4:36 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: State Functions
Replies: 4
Views: 77

Re: State Functions

it was PD TV HUGS. i don't remember what the actual words they came up with were haha
by bellaha4F
Tue Feb 11, 2020 10:23 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: memorize
Replies: 14
Views: 145

memorize

Do we have to memorize any of the entropies' of substances, such as water or co2?
by bellaha4F
Sat Feb 08, 2020 12:08 pm
Forum: General Science Questions
Topic: Midterm
Replies: 17
Views: 257

Re: Midterm

the pizza rolls review worksheet that will be gone over tomorrow is based off of old test questions! i find that review session the most helpful
by bellaha4F
Sat Feb 08, 2020 12:06 pm
Forum: Calculating Work of Expansion
Topic: Units for -PV
Replies: 5
Views: 37

Re: Units for -PV

1 L atm= 101.325 J is on the constant sheet for tests which can be found on the chem 14b home page!
by bellaha4F
Thu Feb 06, 2020 2:20 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: boltzmann constant
Replies: 2
Views: 19

boltzmann constant

the boltzmann constant will always be given to us on tests right? thanks!
by bellaha4F
Thu Feb 06, 2020 2:14 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: degeneracy
Replies: 2
Views: 18

degeneracy

so when calculating degeneracy, we also use Avogadro's constant when calculating the number of atoms right? so for example if there was only one mol of something, it would be the number of positions^(6.026 x 10^23)?
by bellaha4F
Thu Feb 06, 2020 2:10 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: irreversible vs reversible
Replies: 3
Views: 16

irreversible vs reversible

can someone explain to me the difference between an irreversible and reversible path? thank you!
by bellaha4F
Sat Feb 01, 2020 5:29 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: isolated system
Replies: 13
Views: 57

isolated system

can someone give examples of an isolated system?
by bellaha4F
Sat Feb 01, 2020 5:06 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Degeneracy
Replies: 3
Views: 33

Re: Degeneracy

they were depictions of the different states the atoms can be in. all the microstates have the same energy!
by bellaha4F
Sat Feb 01, 2020 5:02 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: kinetics
Replies: 8
Views: 43

kinetics

can someone explain the idea of kinetics please, thanks!
by bellaha4F
Wed Jan 29, 2020 6:07 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: memorize
Replies: 6
Views: 34

memorize

will we need to memorize the heat capacity for different elements, or will it always be given on problems?
by bellaha4F
Wed Jan 29, 2020 5:15 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: homework question 4A.3
Replies: 6
Views: 55

Re: homework question 4A.3

^^to answer the conversion question, you would use 1 L*atm = 101.325 J conversion. it's on lavelle's constant and equations sheet!
by bellaha4F
Wed Jan 22, 2020 9:45 pm
Forum: Student Social/Study Group
Topic: midterm/final
Replies: 12
Views: 129

Re: midterm/final

the tests are usually easier, with the questions kind of mirroring the homework problems. The midterm/final is much longer and contains complicated questions, from my experience last year.
by bellaha4F
Wed Jan 22, 2020 6:30 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: test 1 worksheet
Replies: 1
Views: 43

test 1 worksheet

does anyone have the answers for the test 1 practice worksheet? thank you so much!!
by bellaha4F
Wed Jan 22, 2020 6:08 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Using Kc Vs Kp
Replies: 18
Views: 145

Re: Using Kc Vs Kp

if all the components are gases, use kp. if all aqueous, use kc. (unless the test question says otherwise)
by bellaha4F
Wed Jan 22, 2020 6:03 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: approximation
Replies: 5
Views: 39

Re: approximation

10^-3
by bellaha4F
Tue Jan 21, 2020 5:00 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: salt and water reactions
Replies: 2
Views: 38

salt and water reactions

is there a way to easily know what the polyprotic acids will break down into? i'm having trouble figuring out the reaction equations.
by bellaha4F
Sun Jan 19, 2020 1:40 am
Forum: Ideal Gases
Topic: inert gas
Replies: 5
Views: 27

inert gas

can someone define what an inert gas is? and how to tell which gases are inert?
by bellaha4F
Sun Jan 19, 2020 1:29 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: le chatelier's principle
Replies: 3
Views: 26

le chatelier's principle

can someone explain to me le chatelier's principle and how we use it, thanks!
by bellaha4F
Sun Jan 19, 2020 1:19 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: lewis structure
Replies: 11
Views: 65

lewis structure

we won't need to draw lewis structures for reactions/products, or depict acids/bases on tests for 14b right?
by bellaha4F
Sun Jan 19, 2020 1:17 am
Forum: Ideal Gases
Topic: Topics on Test 1
Replies: 37
Views: 277

Re: Topics on Test 1

test 1 will be everything up until acids and bases!
by bellaha4F
Sun Jan 19, 2020 1:16 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: homework 5G9
Replies: 1
Views: 14

homework 5G9

Hi, I'm a little confused on 5G9 and how to tell if certain amounts/etc. are going to stay the same or not. Can someone pls explain!
by bellaha4F
Thu Jan 09, 2020 4:12 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: How to interpret reactions based on quotient in relation to equilibrium constant
Replies: 5
Views: 55

Re: How to interpret reactions based on quotient in relation to equilibrium constant

If Q=K, the reaction is at equilibrium If Q>K, the reaction is at post-equilibrium. the reverse reaction will proceed because there's too much product or not enough reactants. If Q<K, the reaction is a pre-equilibrium. the forward reaction will proceed because not enough product has been made yet.
by bellaha4F
Thu Jan 09, 2020 4:00 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kp v. Kc
Replies: 5
Views: 32

Re: Kp v. Kc

My TA said if the reaction contains all gases, assume Kp. Otherwise, they would tell us in the directions of the problem to find Kc.
by bellaha4F
Thu Jan 09, 2020 3:57 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: confused about ice table
Replies: 5
Views: 38

confused about ice table

can someone explain to me what an ice table is and how we use it?
by bellaha4F
Thu Jan 09, 2020 3:54 pm
Forum: Ideal Gases
Topic: Understanding Q
Replies: 19
Views: 116

Re: Understanding Q

Q tells what point the reaction is at in relation to K, therefore it is solved the same way as K.
by bellaha4F
Thu Jan 09, 2020 3:51 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: solid/liquid
Replies: 7
Views: 42

solid/liquid

When there's a solid or liquid in the reaction, I know we disregard it. Do we just substitute it with a one when writing the K constant?
by bellaha4F
Sat Dec 07, 2019 10:44 pm
Forum: Calculating the pH of Salt Solutions
Topic: weak acid/base and pH
Replies: 2
Views: 50

weak acid/base and pH

So in general a weak base will raise the pH and a weak acid will lower the pH, right?
by bellaha4F
Thu Dec 05, 2019 9:55 pm
Forum: Naming
Topic: cobaltate
Replies: 1
Views: 30

cobaltate

in the naming examples sheet on lavelle's website it says K3[CoF6] is potassium-hexa-fluoro-cobaltate(III). I was assuming the net charge of this is 0 because it doesn't say otherwise, so why is it cobaltate?
by bellaha4F
Thu Dec 05, 2019 6:18 pm
Forum: Hybridization
Topic: d hybridized orbital confusion
Replies: 1
Views: 19

Re: d hybridized orbital confusion

i'm pretty sure after the sp
so for example: sp3d2
by bellaha4F
Thu Dec 05, 2019 6:15 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining Polarity
Replies: 2
Views: 37

Re: Determining Polarity

polar, also none of the dipole moments can ever cancel out in T-shape if i'm not mistaken
by bellaha4F
Thu Dec 05, 2019 5:21 pm
Forum: Calculating the pH of Salt Solutions
Topic: Wednesday Lecture 12/4
Replies: 4
Views: 62

Re: Wednesday Lecture 12/4

I think that was more chem 14b if I am not mistaken, and we don't really need to know that
by bellaha4F
Thu Dec 05, 2019 5:17 pm
Forum: Hybridization
Topic: hybridization
Replies: 1
Views: 27

hybridization

can anyone briefly explain hybridization and what we're going to need to know for the final about it?
by bellaha4F
Thu Dec 05, 2019 2:23 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: water
Replies: 3
Views: 55

water

I don't understand why water is monodentate? I thought since there are two hydrogens attached to the oxygen molecule, it should be polydentate?
by bellaha4F
Sat Nov 30, 2019 9:50 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: What to know for the final
Replies: 8
Views: 101

Re: What to know for the final

i don't think so. we should just stick with what has been assigned for reading and homework and what dr. lavelle talks about in lecture!
by bellaha4F
Sat Nov 30, 2019 9:49 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Content
Replies: 14
Views: 128

Re: Final Exam Content

it's cumulative, based on everything we've learned starting from week 1
by bellaha4F
Sat Nov 30, 2019 9:47 pm
Forum: Administrative Questions and Class Announcements
Topic: Difficulty
Replies: 14
Views: 138

Re: Difficulty

this class has been very difficult for me, since I only took honors chem sophomore year of high school. it has been taking a while for me to get use to chemistry again :(
by bellaha4F
Sat Nov 30, 2019 9:45 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining Polarity
Replies: 10
Views: 94

Re: Determining Polarity

if the net dipoles all cancel out (bc of electronegativities), then it will be nonpolar (if they all cancel out)
by bellaha4F
Sat Nov 30, 2019 9:37 pm
Forum: Hybridization
Topic: Hybridization
Replies: 7
Views: 79

Re: Hybridization

I think that's it! As long as you can do the homework problems with that, you should be good.
by bellaha4F
Thu Nov 21, 2019 9:11 pm
Forum: Dipole Moments
Topic: boiling point example
Replies: 3
Views: 55

boiling point example

in one of the worksheet answer key it says that the boiling point of KCl is higher than KI. however I thought that since I is bigger than Cl, KI should have a higher boiling point?
by bellaha4F
Thu Nov 21, 2019 9:06 pm
Forum: Bond Lengths & Energies
Topic: Boiling Point
Replies: 7
Views: 190

Re: Boiling Point

when the surface area increases, there's more room for temporary induced dipole interactions to occur, therefore more LDFs, therefore a higher boiling point.
by bellaha4F
Thu Nov 21, 2019 4:25 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: bond angles
Replies: 3
Views: 25

bond angles

when the bond angle is less than what's normal (for example, bent with 2 lone pairs is less than 109.5), do we have to memorize the exact number (For example, water is 104.5)? Or is saying less than 109.5 fine?
by bellaha4F
Thu Nov 21, 2019 2:13 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: electron-pair geometry vs molecular geometry
Replies: 3
Views: 37

electron-pair geometry vs molecular geometry

What is the difference between electron-pair geometry and molecular geometry? Should we know both or should we just know the molecular geometry?
by bellaha4F
Thu Nov 21, 2019 12:59 am
Forum: Hybridization
Topic: for test 2
Replies: 7
Views: 70

for test 2

should we know hybridization for test 2?
by bellaha4F
Thu Nov 14, 2019 8:12 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: varying VSEPRs
Replies: 7
Views: 64

varying VSEPRs

Is there ever going to be a case where a molecule could have 2 different VSEPR models?
by bellaha4F
Thu Nov 14, 2019 8:11 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape Name
Replies: 17
Views: 199

Re: Molecular Shape Name

Knowing all of them will be the best I think, test-wise
by bellaha4F
Thu Nov 14, 2019 8:02 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lewis Structures & VSEPR
Replies: 9
Views: 57

Re: Lewis Structures & VSEPR

I think drawing the Lewis structure out first is helpful when determining the VESPR model, but I don't know if it's necessary. However, on tests, they might expect us to draw it out.
by bellaha4F
Thu Nov 14, 2019 8:01 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 2
Replies: 11
Views: 101

Re: Test 2

I think going over outline 4 and doing all the homework problems would be a good way to study.
by bellaha4F
Thu Nov 14, 2019 7:58 pm
Forum: Bond Lengths & Energies
Topic: Bond lengths
Replies: 8
Views: 68

Re: Bond lengths

I think we should know concept wise
by bellaha4F
Thu Nov 07, 2019 8:22 pm
Forum: Ionic & Covalent Bonds
Topic: coordinate covalent bond
Replies: 2
Views: 24

coordinate covalent bond

can someone explain what a coordinate covalent bond is?
by bellaha4F
Thu Nov 07, 2019 8:05 pm
Forum: Lewis Acids & Bases
Topic: lewis acid vs base
Replies: 2
Views: 31

lewis acid vs base

is the lewis acid and base valid for every single compound? or is it just some compounds that have a lewis acid and base?
by bellaha4F
Thu Nov 07, 2019 8:00 pm
Forum: Bond Lengths & Energies
Topic: bond length rules
Replies: 2
Views: 26

bond length rules

are there exceptions to the bond length rules (ie the triple bond is the shortest and strongest while the single bond is the longest and weakest)
by bellaha4F
Thu Nov 07, 2019 7:59 pm
Forum: Bond Lengths & Energies
Topic: dissociation energy
Replies: 6
Views: 50

dissociation energy

how do we calculate the dissociation energy? Is there a formula?
by bellaha4F
Tue Nov 05, 2019 1:29 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: lyman and balmer
Replies: 3
Views: 61

lyman and balmer

I'm still confused on how to use the lyman and balmer series. Can someone please explain this to me?
by bellaha4F
Thu Oct 31, 2019 2:36 pm
Forum: Octet Exceptions
Topic: expanded valence shell confusion
Replies: 3
Views: 45

expanded valence shell confusion

hi! can someone explain to me the expanded valence shell. i'm not sure I understand it completely!
by bellaha4F
Thu Oct 31, 2019 2:32 pm
Forum: Ionic & Covalent Bonds
Topic: Valence Electrons?
Replies: 15
Views: 130

Re: Valence Electrons?

regarding the picture posted, I thought Cl has 7 valence electrons, and the chart says it has 5? I'm pretty sure that chlorine has 7 valence electrons? I could be wrong, unless I'm reading the picture wrong.
by bellaha4F
Thu Oct 31, 2019 2:27 pm
Forum: Lewis Structures
Topic: valence electrons of nonmetals
Replies: 3
Views: 31

valence electrons of nonmetals

how do you figure out the valence electron # of nonmetals/transition metals?
by bellaha4F
Thu Oct 31, 2019 2:24 pm
Forum: Electronegativity
Topic: Electron Negativity vs affinity?
Replies: 5
Views: 37

Re: Electron Negativity vs affinity?

electron affinity is the energy released when electrons are added to a gas phase atom. electronegativity is the electron pulling power of an atom.
by bellaha4F
Thu Oct 31, 2019 2:16 pm
Forum: Lewis Structures
Topic: lewis structures
Replies: 4
Views: 40

lewis structures

Do you think there's going to be different acceptable answers Lewis structure drawings on the midterm?
by bellaha4F
Wed Oct 23, 2019 8:48 pm
Forum: Trends in The Periodic Table
Topic: bond length
Replies: 9
Views: 94

bond length

should we know how to calculate the bond lengths of the lewis structures? is there even a way to do that?
by bellaha4F
Wed Oct 23, 2019 8:41 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: coulomb potential energy
Replies: 4
Views: 46

coulomb potential energy

can someone explain to me the electrostatic/coulomb potential energy and its significance? I know it's proportional to (q1)(q2)/r.
by bellaha4F
Wed Oct 23, 2019 8:31 pm
Forum: Trends in The Periodic Table
Topic: Location of elements
Replies: 12
Views: 167

Re: Location of elements

I think we should know it, and I'm assuming that it'd be really helpful for the tests!
by bellaha4F
Wed Oct 23, 2019 8:26 pm
Forum: Trends in The Periodic Table
Topic: Exceptions
Replies: 3
Views: 44

Re: Exceptions

the ionization energies decrease down a group and increase across a period. however, it's only for gases
by bellaha4F
Wed Oct 23, 2019 8:24 pm
Forum: Trends in The Periodic Table
Topic: Aufbau Principle
Replies: 11
Views: 117

Aufbau Principle

Can someone explain what the Aufbau/building up principle is?
by bellaha4F
Wed Oct 23, 2019 8:20 pm
Forum: Ionic & Covalent Bonds
Topic: Week 4 Homework
Replies: 9
Views: 123

Re: Week 4 Homework

quantum world probably because we only started the chemical bonds section, so some of it might not make sense
by bellaha4F
Wed Oct 16, 2019 11:21 pm
Forum: Properties of Light
Topic: homework 1A.3
Replies: 8
Views: 87

Re: homework 1A.3

when the frequency decreases, the amplitude of the wave also decreases and the wave becomes wider. the electrical field coincides with amplitude.
by bellaha4F
Wed Oct 16, 2019 11:16 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Best Way To Study?
Replies: 56
Views: 719

Re: Best Way To Study?

I like to go through each homework problem and make sure I understand how to do every one of them! I also watch the modules.
by bellaha4F
Wed Oct 16, 2019 11:14 pm
Forum: *Shrodinger Equation
Topic: Schrondiger's Wave Function Equation
Replies: 4
Views: 70

Re: Schrondiger's Wave Function Equation

Will we have to know Schrodinger's wave function equation for future tests?
by bellaha4F
Wed Oct 16, 2019 11:11 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 2087

Re: Week 2 Homework Problems [ENDORSED]

aphung1G wrote:Does anyone know the energy of microwaves?

Arrange the following types of photons of electromagnetic
radiation in order of increasing energy: g -rays, visible light, ultraviolet radiation, microwaves, x-rays.


microwaves would have the least energy!
by bellaha4F
Wed Oct 16, 2019 11:07 pm
Forum: *Black Body Radiation
Topic: black body
Replies: 2
Views: 86

black body

What should we know about black bodies for upcoming tests?
by bellaha4F
Thu Oct 10, 2019 8:53 pm
Forum: Limiting Reactant Calculations
Topic: percent yield
Replies: 10
Views: 228

percent yield

should we always show the percent yields in the limiting reactant problems, or just when it's specifically asked?
by bellaha4F
Thu Oct 10, 2019 8:52 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 4046

Re: Test 1 [ENDORSED]

We don't need a blue book! Good luck!
by bellaha4F
Thu Oct 10, 2019 8:51 pm
Forum: Properties of Electrons
Topic: work needed
Replies: 2
Views: 46

work needed

should we draw diagrams for all the electron problems? Is it a necessity?
by bellaha4F
Thu Oct 10, 2019 8:50 pm
Forum: Significant Figures
Topic: for test 1
Replies: 3
Views: 108

for test 1

for test 1, will we get points off if we round to the wrong significant figure?
by bellaha4F
Thu Oct 10, 2019 8:49 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: for test 1
Replies: 1
Views: 79

for test 1

should we know the definitions verbatim of accuracy, precision, mole, etc. for the test?
by bellaha4F
Thu Oct 03, 2019 9:37 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: avogadro number
Replies: 7
Views: 104

avogadro number

Can someone explain to me what exactly the avogadro number is and how we use it?

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