Search found 63 matches

by bellaha4F
Sun Jan 19, 2020 1:40 am
Forum: Ideal Gases
Topic: inert gas
Replies: 5
Views: 15

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: 11

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: 27

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: 36
Views: 149

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: 8

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: 35

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: 16

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: 24

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: 67

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: 23

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: 27

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: 20

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: 13

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: 18

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: 40

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: 18

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: 32

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: 62

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: 78

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: 95

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: 68

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: 59

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: 40

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: 72

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: 16

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: 23

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: 54

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: 41

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: 119

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: 43

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: 78

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: 39

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: 14

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: 21

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: 18

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: 39

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: 45

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: 33

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: 101

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: 22

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: 29

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: 23

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: 68

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: 35

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: 101

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: 31

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: 83

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: 102

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: 58

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: 353

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: 57

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: 1582

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: 51

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: 145

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: 2737

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: 37

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: 80

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: 59

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: 75

avogadro number

Can someone explain to me what exactly the avogadro number is and how we use it?
by bellaha4F
Thu Oct 03, 2019 9:33 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 95
Views: 19712

Re: Final Jitters

Anxiety is something I struggle with too! I like to reread and practice problems during the week to make sure I am prepared for the test!
by bellaha4F
Thu Oct 03, 2019 9:08 pm
Forum: SI Units, Unit Conversions
Topic: which unit to use
Replies: 9
Views: 128

which unit to use

If not given a specific unit to convert, should we just keep the units as it is in the problem, or convert it to the SI fundamental base units?
by bellaha4F
Thu Oct 03, 2019 12:53 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: differentiating between different types of masses
Replies: 2
Views: 49

differentiating between different types of masses

What is the difference between atomic mass and molar mass and regular mass?
by bellaha4F
Thu Oct 03, 2019 12:32 pm
Forum: SI Units, Unit Conversions
Topic: knowing how many sig figs to use
Replies: 17
Views: 126

knowing how many sig figs to use

If a problem uses a certain amount of sig figs, should all our work use that amount of sig figs, or should we round to the sig fig amount only for the answer?

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