Search found 100 matches

by nshahwan 1L
Sun Mar 15, 2020 6:44 am
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: E cell
Replies: 9
Views: 116

Re: E cell

Is there any point in which Enot and Ecell would be the same value?
by nshahwan 1L
Sun Mar 15, 2020 6:43 am
Forum: Administrative Questions and Class Announcements
Topic: final tech malfunctions
Replies: 5
Views: 145

Re: final tech malfunctions

605395381 wrote:they will probably have us download and print the finals

But what if I don't have a printer? Like that seems really problematic
by nshahwan 1L
Sat Mar 14, 2020 12:18 pm
Forum: Administrative Questions and Class Announcements
Topic: final tech malfunctions
Replies: 5
Views: 145

final tech malfunctions

Im not saying this would happen, but I am really afraid that my laptop will malfunction or my wifi will go out or something during the final. Do y'all think if something bad like that happens we will still be able to turn it in someway else?
by nshahwan 1L
Sat Mar 14, 2020 12:13 pm
Forum: Administrative Questions and Class Announcements
Topic: Partial Credit
Replies: 8
Views: 119

Re: Partial Credit

KBELTRAMI_1E wrote:Does anyone know how to scan from an at home wireless printer?

There are also a lot of apps you can download to scan with your phone not just notes.
by nshahwan 1L
Sat Mar 14, 2020 12:11 pm
Forum: First Order Reactions
Topic: First order rxns
Replies: 6
Views: 69

First order rxns

I'm a little confused on how you specifically determine if it is first order or not. Could someone explain with an example because sometimes in the book it just says it is first order and doesn't say how to get that.
by nshahwan 1L
Mon Mar 09, 2020 12:02 am
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Concentration cells
Replies: 4
Views: 60

Concentration cells

On test 2 someone explained to me that on one of the questions you had to know your solubility rules but I don't remember any of that so does anyone have a good source where I could learn them?
by nshahwan 1L
Mon Mar 09, 2020 12:00 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: gibbs free energy
Replies: 15
Views: 130

Re: gibbs free energy

In the electrochem readings, it defines Gibbs free energy as non expansion work. Is that relevant?
by nshahwan 1L
Sun Mar 08, 2020 11:59 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: n=2
Replies: 7
Views: 74

n=2

In the book for calculating Gibbs it always uses n=2. Im confused on how they got that because in one of the problems the solution uses n=6. I think I must have missed it in the reading or something but how do you figure out what n is?
by nshahwan 1L
Sun Mar 08, 2020 11:55 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: E cell
Replies: 9
Views: 116

E cell

On page 549 the difference between Ecell and E standard cell is explained but the book gets really wordy and confusing. It says it is important to know so could someone explain to me the difference?
by nshahwan 1L
Sun Mar 08, 2020 11:53 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6K.3
Replies: 1
Views: 36

6K.3

I am confused on part d of this question could someone explain how to do it? Basically the way I do these question I usually get the correct answer, but then the solutions shows something different in the balancing or it combines certain elements and I am just confused on when to do that.
by nshahwan 1L
Sun Mar 01, 2020 10:26 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: information given
Replies: 1
Views: 34

information given

This is a more general question, but does anyone have any advice on what they would do if the question does not give enough information to use any formulas? I usually get very stuck when I am missing a variable that PV=nRT doesn't help with, and I was wondering if there were any strategies anyone ha...
by nshahwan 1L
Sun Mar 01, 2020 10:22 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: salt bridge
Replies: 9
Views: 82

Re: salt bridge

Should there be any specific examples of salts that are in salt bridges that we should be aware of?
by nshahwan 1L
Sun Mar 01, 2020 10:20 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: surroundings
Replies: 4
Views: 117

Re: surroundings

i guess also how would you go about solving a problem where you aren't given any entropies in the first place? Like this obviously depends on the information given in the question, but i feel like I often don't have enough information to find both. Thank you so much for the explanations tho they wer...
by nshahwan 1L
Sun Mar 01, 2020 10:15 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: gibbs free energy
Replies: 15
Views: 130

Re: gibbs free energy

ok thanks for the simpler clarification!
by nshahwan 1L
Sun Mar 01, 2020 10:13 pm
Forum: Balancing Redox Reactions
Topic: half reaction
Replies: 10
Views: 116

Re: half reaction

thank you so much for all the great explanations!!
by nshahwan 1L
Sun Feb 23, 2020 11:54 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: gibbs free energy
Replies: 15
Views: 130

gibbs free energy

How would you define gibbs free energy in laymens terms?
by nshahwan 1L
Sun Feb 23, 2020 11:53 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: surroundings
Replies: 4
Views: 117

surroundings

can someone explain how you find surrounding again? I just want a clearer and simpler explanation than the book.
by nshahwan 1L
Sun Feb 23, 2020 11:43 pm
Forum: Balancing Redox Reactions
Topic: half reaction
Replies: 10
Views: 116

half reaction

how do you know when to put water in the half reaction when balancing?
by nshahwan 1L
Sun Feb 23, 2020 11:41 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: salt bridge
Replies: 9
Views: 82

salt bridge

can someone re explain what a salt bridge does?
by nshahwan 1L
Sun Feb 23, 2020 11:40 pm
Forum: Balancing Redox Reactions
Topic: Test 2 Topics
Replies: 7
Views: 65

Re: Test 2 Topics

Yes any electrochem we do in week 8 should be on it
by nshahwan 1L
Sun Feb 16, 2020 11:52 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: equipartition theorum
Replies: 2
Views: 83

Re: equipartition theorum

Thanks so much!
by nshahwan 1L
Sun Feb 16, 2020 11:49 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: enthalpy phase changes
Replies: 2
Views: 55

Re: enthalpy phase changes

4C.9 (a) Calculate the heat that must be supplied to a copper kettle of mass 500.0 g containing 400.0 g of water to raise its temperature from 22 . 0 °C to the boiling point of water, 100 . 0 °C . (b) What percentage of the heat is used to raise the temperature of the water? (See Table 4A.2.) 4C.11 ...
by nshahwan 1L
Wed Feb 12, 2020 12:55 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: enthalpy phase changes
Replies: 2
Views: 55

enthalpy phase changes

How do you know if you are supposed to add the enthalpy of phase change to the heat or not? For example in 4C.9 you do not, but in 4C.11 you do
by nshahwan 1L
Wed Feb 12, 2020 11:45 am
Forum: Calculating Work of Expansion
Topic: 4A.3
Replies: 1
Views: 41

4A.3

Would we be given any problems like this on the midterm? Only asking because it uses radius and distance for volume instead of just volume in leters
by nshahwan 1L
Tue Feb 11, 2020 1:29 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: equipartition theorum
Replies: 2
Views: 83

equipartition theorum

On the midterm, will we be given the formulas for heat capacity monatomic ideal gases? For example, will we be given the formula for a monatomic ideal gas heat capacity at constant volume/pressure (4C.3)
by nshahwan 1L
Sun Feb 09, 2020 8:13 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: expansion work
Replies: 4
Views: 38

Re: expansion work

Would we ever have to calculate/know the amount of that force? Thanks!!
by nshahwan 1L
Sun Feb 09, 2020 8:11 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: work
Replies: 3
Views: 57

Re: work

Thank you so much this helped a lot!!
by nshahwan 1L
Sun Feb 09, 2020 8:09 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: internal energy and work
Replies: 4
Views: 39

Re: internal energy and work

Ok thanks so much!
by nshahwan 1L
Sun Feb 09, 2020 8:08 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: p248
Replies: 3
Views: 25

Re: p248

where did you get that internal energy is equal to 2/3nRT?
by nshahwan 1L
Sun Feb 09, 2020 8:06 pm
Forum: Calculating Work of Expansion
Topic: reversible expansion
Replies: 6
Views: 48

Re: reversible expansion

Thanks for the replies. Also I think they will tell us if it is reversible but I am not sure. For example if it is isothermic should we assume it to be reversible?
by nshahwan 1L
Sun Feb 02, 2020 11:06 pm
Forum: Calculating Work of Expansion
Topic: reversible expansion
Replies: 6
Views: 48

reversible expansion

Could someone explain how the small change is made to reverse a process? Like I understand a very small part of a variable is changed (like pressure) but how would that be done?
by nshahwan 1L
Sun Feb 02, 2020 11:03 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: p248
Replies: 3
Views: 25

p248

This page explains the isothermal expansion of an ideal gas and I don't really understand it in the books language. Could someone explain it in other words or perhaps an example?
by nshahwan 1L
Sun Feb 02, 2020 10:56 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: internal energy and work
Replies: 4
Views: 39

internal energy and work

when does internal energy not equal work?
by nshahwan 1L
Sun Feb 02, 2020 10:32 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: expansion work
Replies: 4
Views: 38

expansion work

This is just for clarification but would the expansion work of the piston and cylinder on p245 be when the piston is retracting? Also could someone more clearly define what it means to be the force opposing expansion?
by nshahwan 1L
Sun Feb 02, 2020 10:27 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: work
Replies: 3
Views: 57

work

Im having a little trouble understanding the language of when work should be positive or negative. What is the difference between work done on a system and work done by a system? Could someone explain using examples?
by nshahwan 1L
Sun Jan 26, 2020 2:46 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: bar conversion
Replies: 5
Views: 76

Re: bar conversion

I noticed this on the formula sheet thank you for letting me know!
by nshahwan 1L
Sun Jan 26, 2020 2:45 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ice box approximation
Replies: 9
Views: 90

Re: ice box approximation

Thank you all so much! I found a much better explanation of this rule in chapter 6 as well.
by nshahwan 1L
Sun Jan 26, 2020 2:43 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 6D.3
Replies: 3
Views: 61

Re: 6D.3

oh ok thanks so much!
by nshahwan 1L
Sun Jan 26, 2020 2:42 pm
Forum: Ideal Gases
Topic: pressure
Replies: 10
Views: 100

Re: pressure

thank you all so much this helped a lot!
by nshahwan 1L
Thu Jan 23, 2020 10:06 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 6D.3
Replies: 3
Views: 61

6D.3

Could someone explain how to do part b? Because it is asking for Kb and pKb is it an acid or a base?
by nshahwan 1L
Thu Jan 23, 2020 8:56 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 6B.9
Replies: 2
Views: 38

6B.9

Can someone explain how you get the first to columns? Like why did they just multiply 1.5 by 10-14
by nshahwan 1L
Thu Jan 23, 2020 6:51 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 6A.21
Replies: 2
Views: 14

6A.21

6A.21 The value of K w for water at body temperature (37 °C) is 2 .1 × 10 − 14 . (a) What is the molar concentration of H 3 O + ions at 37 °C? (b) What is the molar concentration of OH − in neutral water at 37 °C?

I am confused on what should be the difference for part a vs part b?
by nshahwan 1L
Tue Jan 21, 2020 10:10 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: total pressure increase
Replies: 1
Views: 34

total pressure increase

Could someone explain the first paragraph on p431 of the textbook??
by nshahwan 1L
Tue Jan 21, 2020 9:23 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: example 5J.2
Replies: 1
Views: 17

example 5J.2

In example 5J.2, it justifies picking 0.0144... over 81.7... for the x value because partial pressures must be positive. However, both of these values are positive. How would you know which positive value to pick?
by nshahwan 1L
Tue Jan 21, 2020 7:23 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ice box approximation
Replies: 9
Views: 90

ice box approximation

When using an ice box, should you always use the approximation method where x additions are removed first? In other words, how can you tell when or when not to use the quadratic equation? Toolbox 5I.1 explains this, but I don't understand it in their words.
by nshahwan 1L
Tue Jan 21, 2020 7:03 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Gibbs energy graph
Replies: 1
Views: 35

Gibbs energy graph

Could someone explain the Gibbs free-energy curve shown in figure 5I.3 in the book. The book explains it but I don't quite have a grasp of it.
by nshahwan 1L
Tue Jan 21, 2020 6:24 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: bar conversion
Replies: 5
Views: 76

bar conversion

Could someone more clearly explain how to change the units to bar? Example 5I.1 show it but it is not very clear and I am confused
by nshahwan 1L
Tue Jan 21, 2020 3:58 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ice box
Replies: 4
Views: 41

ice box

would there be any case when the reactants would not be -x in the ice box?
by nshahwan 1L
Tue Jan 21, 2020 3:56 pm
Forum: Ideal Gases
Topic: pressure
Replies: 10
Views: 100

pressure

what is the difference between partial pressure and total pressure? Could someone explain this using an example
by nshahwan 1L
Tue Jan 21, 2020 3:54 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: using K
Replies: 5
Views: 34

using K

how should we know to use Kp or Kc? Like when is it appropriate to use each one. I am asking because the example problem in class for Kc was an equation of only gases.
by nshahwan 1L
Sun Dec 08, 2019 1:24 am
Forum: Hybridization
Topic: N-triple bond-N pi bond hybridization
Replies: 4
Views: 121

Re: N-triple bond-N pi bond hybridization

thank you this helped
by nshahwan 1L
Sun Dec 08, 2019 1:23 am
Forum: *Shrodinger Equation
Topic: schrodingers equation
Replies: 7
Views: 200

Re: schrodingers equation

could someone conceptually explain it?
by nshahwan 1L
Sun Dec 08, 2019 1:21 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: polarisability
Replies: 3
Views: 215

polarisability

Would we ever have to calculate anything with the formula he gave us in class? also, would it be correct to say the higher the charge, the more polarizable the anion
by nshahwan 1L
Sun Dec 08, 2019 1:19 am
Forum: Bronsted Acids & Bases
Topic: 6C.21
Replies: 1
Views: 76

6C.21

6C.21 Suggest an explanation for the different strengths of (a) acetic acid and trichloroacetic acid; (b) acetic acid and formic acid.
Am i supposed to know the formulas for things like formic acid?
by nshahwan 1L
Sat Dec 07, 2019 9:17 pm
Forum: Identifying Acidic & Basic Salts
Topic: 6C.17
Replies: 2
Views: 124

6C.17

6C.17 Which is the stronger base, the hypobromite ion, BrO−, or morphine, C 17 H 19 O 3 N ? Justify your answer.
The book's justification is because of pKb, but how would we know that? Are we supposed to be able to calculate it?
by nshahwan 1L
Sat Dec 07, 2019 4:01 pm
Forum: Bronsted Acids & Bases
Topic: FJ.7
Replies: 1
Views: 82

FJ.7

Im having trouble balancing part d of this question could someone help? J.7 Select an acid and a base for a neutralization reaction that results in the formation of (a) potassium bromide; (b) zinc nitrite; (c) calcium cyanide, Ca(CN) 2 ; (d) potassium phosphate. Write the balanced equation for each ...
by nshahwan 1L
Fri Dec 06, 2019 1:25 pm
Forum: Biological Examples
Topic: Myoglobin and hemeglobin [ENDORSED]
Replies: 1
Views: 62

Myoglobin and hemeglobin [ENDORSED]

Ok so this is just clarification.
heme complex + protein = myoglobin
4 myoglobin = hemoglobin
Also is one heme complex monodentate, but the myoglobin as a whole is tetradentate??
by nshahwan 1L
Fri Dec 06, 2019 1:22 pm
Forum: Naming
Topic: oxidation number
Replies: 3
Views: 52

oxidation number

Can the oxidation number of the metal ever be above (IV)? I have never seen it higher so I'm just curious.
by nshahwan 1L
Fri Dec 06, 2019 1:21 pm
Forum: Significant Figures
Topic: pH sig figs
Replies: 9
Views: 220

pH sig figs

Can someone explain how to do sig figs for pH I'm confused??
by nshahwan 1L
Fri Dec 06, 2019 1:19 pm
Forum: Photoelectric Effect
Topic: kinetic Energy
Replies: 2
Views: 132

kinetic Energy

Can someone explain when the Kinetic energy would be 0 in a question? I'm confused because in some questions it is zero and in others it is not and I don't know how to tell when it is?
by nshahwan 1L
Fri Dec 06, 2019 1:16 pm
Forum: Hybridization
Topic: N-triple bond-N pi bond hybridization
Replies: 4
Views: 121

N-triple bond-N pi bond hybridization

so for :N=N: the sigma bond would be (N2sp;N2sp) but for the pi bonds, would both of them be (N2p2;N2p2) or would it be (N2p;N2p) for both of them??
by nshahwan 1L
Fri Dec 06, 2019 1:12 pm
Forum: Hybridization
Topic: hybridization of lone pairs
Replies: 4
Views: 58

hybridization of lone pairs

Ok so for lone pairs, do we just look at the regions of electron density and determine they hybridization for just that atom? For example, if I was given a N with 3 regions of electron density (one region being composed of a lone pair), would I write N= 2sp2?
by nshahwan 1L
Fri Dec 06, 2019 1:08 pm
Forum: Conjugate Acids & Bases
Topic: Conjugate acids and bases
Replies: 2
Views: 43

Conjugate acids and bases

Could anyone explain conjugate acids and bases in words? I understand how to identify them in an equation, but is there any way to describe them in words?
by nshahwan 1L
Fri Dec 06, 2019 1:06 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: H bonding
Replies: 4
Views: 146

H bonding

This is just a clarification question, but when looking at a molecule and determining the points of hydrogen bonding, we are supposed to count each lone pair as well as each hydrogen bonded to NO or F correct?
by nshahwan 1L
Fri Dec 06, 2019 1:04 pm
Forum: Naming
Topic: writing formula of a given name
Replies: 5
Views: 102

writing formula of a given name

When naming we write the ligands in alphabetical order. When we write out the formula from a name, should we write the substances in alphabetical order or does it not matter?
by nshahwan 1L
Fri Dec 06, 2019 12:59 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Calculating KA
Replies: 1
Views: 32

Calculating KA

Will we ever have to calculate Ka for weak acids?? Or will they always be given? Also, should we know how to calculate pKa?(its simple but It sort of relates to if we have to calculate Ka in the first place or if it will be given)
by nshahwan 1L
Tue Dec 03, 2019 11:52 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: coordination number
Replies: 3
Views: 39

Re: coordination number

also, should we know an example of a coordination compound for each usual coordination number? Like an example for the coordination number 2, because 2 is a less common coordination number.
by nshahwan 1L
Tue Dec 03, 2019 11:49 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: coordination number
Replies: 3
Views: 39

coordination number

Would it be correct to say that coordination number is synonymous with regions of electron density? Or is it different because it specifically refers to the places in which coordinate covalent bonds are formed?
by nshahwan 1L
Tue Dec 03, 2019 11:45 pm
Forum: Naming
Topic: naming email
Replies: 2
Views: 69

naming email

Regarding the email Dr. Lavelle sent, should we be expected to memorize everything on the pdf in preparation for the final? Everything as in all the neutral and anionic ligands listed as well as the names of the example coordination compounds at the bottom?
by nshahwan 1L
Tue Dec 03, 2019 11:30 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Substitution reaction [ENDORSED]
Replies: 1
Views: 44

Substitution reaction [ENDORSED]

Ok so I understand what a substitution reaction is, however would we need to know which ions cause a less complete reaction? The example in the book is [Fe ( OH 2 ) 6 ] 2+ ( aq ) + Cl − ( aq ) → [ FeCl ( OH 2 ) 5 ] + ( aq ) + H 2 O ( l ). Also, could anyone explain why certain ions do not completely...
by nshahwan 1L
Fri Nov 15, 2019 1:24 pm
Forum: Dipole Moments
Topic: IMFs
Replies: 2
Views: 44

IMFs

Is there any specific way to tell the difference between each force when assigning the IMFs to molecules. Like for dipole-dipole, besides it being polar is there anything in a molecule that would tell you it was that? Also for IMFs, are there ever any exceptions?
by nshahwan 1L
Thu Nov 14, 2019 11:41 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2E.3
Replies: 3
Views: 50

2E.3

Can someone explain part b to me?
2E.3 Draw the structures and name the shapes of the following molecules: (a) HCN; (b) CH2F2 .
by nshahwan 1L
Thu Nov 14, 2019 11:36 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: structure ?
Replies: 8
Views: 87

structure ?

How can you tell if something is linear or not?
by nshahwan 1L
Wed Nov 06, 2019 12:22 pm
Forum: Resonance Structures
Topic: resonance hybrid
Replies: 6
Views: 66

resonance hybrid

should we know how to draw a resonance hybrid??
by nshahwan 1L
Wed Nov 06, 2019 12:21 pm
Forum: Lewis Structures
Topic: 2B.11 part c
Replies: 1
Views: 39

2B.11 part c

2B.11 Draw the complete Lewis structure for each of the following compounds: (a) formaldehyde, HCHO, which as its aqueous solution, “formalin,” is used to preserve biological specimens; (b) methanol, C H 3 OH , the toxic compound also called wood alcohol; (c) glycine, H 2 C(N H 2 )COOH , the simples...
by nshahwan 1L
Wed Nov 06, 2019 12:19 pm
Forum: Lewis Structures
Topic: Ionic Lewis structure
Replies: 2
Views: 53

Ionic Lewis structure

How can you tell if the bond is ionic enough to write the lewis structure in that way? For example in 2B.9:2B.9 Draw the complete Lewis structure for each of the following compounds: (a) ammonium chloride; (b) potassium phosphide; (c) sodium hypochlorite. Also, should we know the nomenclature for th...
by nshahwan 1L
Wed Nov 06, 2019 12:15 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: nomenclature
Replies: 3
Views: 134

nomenclature

2A.23 On the basis of the expected charges on the monatomic ions, give the chemical formula of each of the following compounds: (a) magnesium arsenide; (b) indium(III) sulfide; (c) aluminum hydride; (d) hydrogen telluride; (e) bismuth(III) fluoride. Should I know how to do this? we never went over i...
by nshahwan 1L
Wed Nov 06, 2019 12:08 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 1E.5
Replies: 1
Views: 124

1E.5

1E.5 Which of the following statements are true for many-electron atoms? If false, explain why. (a) The effective nuclear charge Z e ff e is independent of the number of electrons present in an atom. (b) Electrons in an s-orbital are more effective than those in other orbitals at shielding other ele...
by nshahwan 1L
Wed Nov 06, 2019 12:06 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 1E.1
Replies: 3
Views: 138

1E.1

1E.1 Which of the following increase when an electron in a lithium atom undergoes a transition from the 1s-orbital to a 2p-orbital? (a) Energy of the electron. (b) Value of n. (c) Value of l. (d) Radius of the atom. Which answers would be different for a hydrogen atom and in what way would they be d...
by nshahwan 1L
Wed Nov 06, 2019 12:04 pm
Forum: Quantum Numbers and The H-Atom
Topic: orbitals vs. subshells
Replies: 4
Views: 150

orbitals vs. subshells

1D.19 How many orbitals are present in the (a) 4p-subshell; (b) 3d-subshell; (c) 1s-subshell; (d) 4f-subshell of an atom?
I just want to confirm if I have this right in my head:
subshells = 4f,3d,3p,1s,etc...
orbitals = number of spots to put the paired electrons in?
by nshahwan 1L
Wed Nov 06, 2019 12:00 pm
Forum: Quantum Numbers and The H-Atom
Topic: 1D.1
Replies: 1
Views: 98

1D.1

1D.1 Which of the following increase when the electron in a hydrogen atom undergoes a transition from the 1s-orbital to a 2p-orbital? (a) Energy of the electron. (b) Value of n. (c) Value of l. (d) Radius of the atom. Could someone explain this one to me? I'm more confused with the quantum number pa...
by nshahwan 1L
Wed Nov 06, 2019 11:57 am
Forum: Einstein Equation
Topic: 1B.15
Replies: 3
Views: 155

Re: 1B.15

also for part d ((d) What kind of electromagnetic radiation was used?) would we need to know something like this for the midterm?
by nshahwan 1L
Wed Nov 06, 2019 11:55 am
Forum: Einstein Equation
Topic: 1B.15
Replies: 3
Views: 155

Re: 1B.15

Im confused as well. Why would we use E=hv for this one?
by nshahwan 1L
Wed Nov 06, 2019 11:52 am
Forum: Einstein Equation
Topic: 1B.9
Replies: 5
Views: 243

Re: 1B.9

I understand how to do this, but could someone explain why you divide the energy of the photon from the given watts?
by nshahwan 1L
Wed Nov 06, 2019 11:47 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: 1A.15
Replies: 1
Views: 64

1A.15

1A.15 In the ultraviolet spectrum of atomic hydrogen, a line is observed at 102.6 nm. Determine the values of n for the initial and final energy levels of the electron during the emission of energy that leads to this spectral line. Also how do you find the initial and final n for this problem? Would...
by nshahwan 1L
Wed Nov 06, 2019 11:44 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: 1A.11
Replies: 3
Views: 166

1A.11

1A.11 In the spectrum of atomic hydrogen, several lines are generally classified together as belonging to a series (for example, Balmer series or Lyman series, as shown in Fig. 1A.10). What is common to the lines within a series that makes grouping them together logical?
Could someone explain this?
by nshahwan 1L
Sun Oct 20, 2019 6:30 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Opposite Spin
Replies: 5
Views: 89

Re: Opposite Spin

The Pauli Exclusion Principle states that no two electrons can share the same combination of four quantum numbers. The electrons in an orbital must have opposite spins in order for their quantum numbers to differ. Since their n, l, and ml are the same, their ms (which refers to the spin of the elec...
by nshahwan 1L
Sun Oct 20, 2019 6:28 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Series
Replies: 3
Views: 49

Re: Series

Figure 1A.10 in the text is a good visual of them
by nshahwan 1L
Sun Oct 20, 2019 6:27 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: how to prepare
Replies: 22
Views: 237

Re: how to prepare

Don't stress too much! there are tons of resources available! I find that talking to other people in the class helps a lot.
by nshahwan 1L
Sun Oct 20, 2019 6:26 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: s-, p-, d- ,f- orbitals
Replies: 10
Views: 134

Re: s-, p-, d- ,f- orbitals

2px: 2 level; p orbital; x-axis
by nshahwan 1L
Sun Oct 20, 2019 6:24 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Nodal planes
Replies: 3
Views: 34

Re: Nodal planes

They aren't overwhelmingly significant I would say, but they give visual to the direction and overall shape of an atomic orbital.
by nshahwan 1L
Sun Oct 20, 2019 6:22 pm
Forum: Photoelectric Effect
Topic: Speed of Light
Replies: 29
Views: 325

Re: Speed of Light

is it better to use 2.998 or 3?
by nshahwan 1L
Sun Oct 20, 2019 6:20 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Best Way To Study?
Replies: 56
Views: 1170

Re: Best Way To Study?

Read the textbook and find other people in the class! Office hours help too!
by nshahwan 1L
Sun Oct 20, 2019 6:19 pm
Forum: Properties of Electrons
Topic: x,y,z for Electrons
Replies: 10
Views: 137

Re: x,y,z for Electrons

Should we have to indicate x, y, z in answers?
by nshahwan 1L
Sun Oct 20, 2019 6:12 pm
Forum: Properties of Light
Topic: Question 1A.3
Replies: 3
Views: 64

Question 1A.3

Can someone explain this one I just want to make sure I'mg getting it right. Which of the following happens when the frequency of electromagnetic radiation decreases? a) The speed of the radiation decreases b) The wavelength of radiation decreases c) The extent of the change in the electrical field ...
by nshahwan 1L
Thu Oct 03, 2019 9:07 pm
Forum: Limiting Reactant Calculations
Topic: Study Strategies/Youtube Videos
Replies: 14
Views: 265

Re: Study Strategies/Youtube Videos

I was looking for more resources for review and these are all super helpful!
by nshahwan 1L
Thu Oct 03, 2019 8:54 pm
Forum: Molarity, Solutions, Dilutions
Topic: Homework Problem G17 Part B
Replies: 2
Views: 58

Re: Homework Problem G17 Part B

Example G2 on page F55 is a good example of this problem.
by nshahwan 1L
Thu Oct 03, 2019 8:51 pm
Forum: Molarity, Solutions, Dilutions
Topic: #E5 part b)
Replies: 2
Views: 68

Re: #E5 part b)

I am not entirely sure, but I think you could use the moles of people, or include the conversion you did in part a in your answer. You would need the moles of people in order to convert to seconds because you have to cancel the moles of peas to have an answer in time units.
by nshahwan 1L
Thu Oct 03, 2019 8:41 pm
Forum: Empirical & Molecular Formulas
Topic: Mass Percentage Composition Rounding
Replies: 3
Views: 67

Mass Percentage Composition Rounding

When calculating mass percentage composition, what should I round the numbers to? I did problem F5 and my percentages for C7H15NO3 did not add up to 100% because of the places I rounded to.

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