Search found 100 matches
- 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: 188
Re: E cell
Is there any point in which Enot and Ecell would be the same value?
- Sun Mar 15, 2020 6:43 am
- Forum: Administrative Questions and Class Announcements
- Topic: final tech malfunctions
- Replies: 5
- Views: 191
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
- Sat Mar 14, 2020 12:18 pm
- Forum: Administrative Questions and Class Announcements
- Topic: final tech malfunctions
- Replies: 5
- Views: 191
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?
- Sat Mar 14, 2020 12:13 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Partial Credit
- Replies: 8
- Views: 178
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.
- Sat Mar 14, 2020 12:11 pm
- Forum: First Order Reactions
- Topic: First order rxns
- Replies: 6
- Views: 154
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.
- 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: 107
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?
- Mon Mar 09, 2020 12:00 am
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: gibbs free energy
- Replies: 15
- Views: 235
Re: gibbs free energy
In the electrochem readings, it defines Gibbs free energy as non expansion work. Is that relevant?
- Sun Mar 08, 2020 11:59 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: n=2
- Replies: 7
- Views: 130
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?
- 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: 188
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?
- Sun Mar 08, 2020 11:53 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6K.3
- Replies: 1
- Views: 61
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.
- Sun Mar 01, 2020 10:26 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: information given
- Replies: 1
- Views: 61
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...
- Sun Mar 01, 2020 10:22 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: salt bridge
- Replies: 9
- Views: 140
Re: salt bridge
Should there be any specific examples of salts that are in salt bridges that we should be aware of?
- 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: 168
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...
- Sun Mar 01, 2020 10:15 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: gibbs free energy
- Replies: 15
- Views: 235
Re: gibbs free energy
ok thanks for the simpler clarification!
- Sun Mar 01, 2020 10:13 pm
- Forum: Balancing Redox Reactions
- Topic: half reaction
- Replies: 10
- Views: 153
Re: half reaction
thank you so much for all the great explanations!!
- Sun Feb 23, 2020 11:54 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: gibbs free energy
- Replies: 15
- Views: 235
gibbs free energy
How would you define gibbs free energy in laymens terms?
- 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: 168
surroundings
can someone explain how you find surrounding again? I just want a clearer and simpler explanation than the book.
- Sun Feb 23, 2020 11:43 pm
- Forum: Balancing Redox Reactions
- Topic: half reaction
- Replies: 10
- Views: 153
half reaction
how do you know when to put water in the half reaction when balancing?
- Sun Feb 23, 2020 11:41 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: salt bridge
- Replies: 9
- Views: 140
salt bridge
can someone re explain what a salt bridge does?
- Sun Feb 23, 2020 11:40 pm
- Forum: Balancing Redox Reactions
- Topic: Test 2 Topics
- Replies: 7
- Views: 126
Re: Test 2 Topics
Yes any electrochem we do in week 8 should be on it
- Sun Feb 16, 2020 11:52 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: equipartition theorum
- Replies: 2
- Views: 125
Re: equipartition theorum
Thanks so much!
- 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: 78
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 ...
- 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: 78
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
- Wed Feb 12, 2020 11:45 am
- Forum: Calculating Work of Expansion
- Topic: 4A.3
- Replies: 1
- Views: 65
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
- Tue Feb 11, 2020 1:29 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: equipartition theorum
- Replies: 2
- Views: 125
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)
- Sun Feb 09, 2020 8:13 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: expansion work
- Replies: 4
- Views: 86
Re: expansion work
Would we ever have to calculate/know the amount of that force? Thanks!!
- Sun Feb 09, 2020 8:11 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: work
- Replies: 3
- Views: 81
Re: work
Thank you so much this helped a lot!!
- Sun Feb 09, 2020 8:09 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: internal energy and work
- Replies: 4
- Views: 50
Re: internal energy and work
Ok thanks so much!
- Sun Feb 09, 2020 8:08 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: p248
- Replies: 3
- Views: 28
Re: p248
where did you get that internal energy is equal to 2/3nRT?
- Sun Feb 09, 2020 8:06 pm
- Forum: Calculating Work of Expansion
- Topic: reversible expansion
- Replies: 6
- Views: 53
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?
- Sun Feb 02, 2020 11:06 pm
- Forum: Calculating Work of Expansion
- Topic: reversible expansion
- Replies: 6
- Views: 53
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?
- Sun Feb 02, 2020 11:03 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: p248
- Replies: 3
- Views: 28
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?
- Sun Feb 02, 2020 10:56 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: internal energy and work
- Replies: 4
- Views: 50
internal energy and work
when does internal energy not equal work?
- Sun Feb 02, 2020 10:32 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: expansion work
- Replies: 4
- Views: 86
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?
- Sun Feb 02, 2020 10:27 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: work
- Replies: 3
- Views: 81
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?
- Sun Jan 26, 2020 2:46 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: bar conversion
- Replies: 5
- Views: 87
Re: bar conversion
I noticed this on the formula sheet thank you for letting me know!
- Sun Jan 26, 2020 2:45 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ice box approximation
- Replies: 9
- Views: 119
Re: ice box approximation
Thank you all so much! I found a much better explanation of this rule in chapter 6 as well.
- Sun Jan 26, 2020 2:43 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 6D.3
- Replies: 3
- Views: 89
Re: 6D.3
oh ok thanks so much!
- Sun Jan 26, 2020 2:42 pm
- Forum: Ideal Gases
- Topic: pressure
- Replies: 10
- Views: 116
Re: pressure
thank you all so much this helped a lot!
- Thu Jan 23, 2020 10:06 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 6D.3
- Replies: 3
- Views: 89
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?
- Thu Jan 23, 2020 8:56 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 6B.9
- Replies: 2
- Views: 41
6B.9
Can someone explain how you get the first to columns? Like why did they just multiply 1.5 by 10-14
- Thu Jan 23, 2020 6:51 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 6A.21
- Replies: 2
- Views: 18
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?
I am confused on what should be the difference for part a vs part b?
- Tue Jan 21, 2020 10:10 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: total pressure increase
- Replies: 1
- Views: 40
total pressure increase
Could someone explain the first paragraph on p431 of the textbook??
- Tue Jan 21, 2020 9:23 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: example 5J.2
- Replies: 1
- Views: 19
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?
- Tue Jan 21, 2020 7:23 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ice box approximation
- Replies: 9
- Views: 119
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.
- Tue Jan 21, 2020 7:03 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Gibbs energy graph
- Replies: 1
- Views: 37
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.
- Tue Jan 21, 2020 6:24 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: bar conversion
- Replies: 5
- Views: 87
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
- Tue Jan 21, 2020 3:58 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ice box
- Replies: 4
- Views: 48
ice box
would there be any case when the reactants would not be -x in the ice box?
- Tue Jan 21, 2020 3:56 pm
- Forum: Ideal Gases
- Topic: pressure
- Replies: 10
- Views: 116
pressure
what is the difference between partial pressure and total pressure? Could someone explain this using an example
- 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.
- Sun Dec 08, 2019 1:24 am
- Forum: Hybridization
- Topic: N-triple bond-N pi bond hybridization
- Replies: 4
- Views: 142
Re: N-triple bond-N pi bond hybridization
thank you this helped
- Sun Dec 08, 2019 1:23 am
- Forum: *Shrodinger Equation
- Topic: schrodingers equation
- Replies: 8
- Views: 275
Re: schrodingers equation
could someone conceptually explain it?
- Sun Dec 08, 2019 1:21 am
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: polarisability
- Replies: 3
- Views: 270
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
- Sun Dec 08, 2019 1:19 am
- Forum: Bronsted Acids & Bases
- Topic: 6C.21
- Replies: 1
- Views: 100
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?
Am i supposed to know the formulas for things like formic acid?
- Sat Dec 07, 2019 9:17 pm
- Forum: Identifying Acidic & Basic Salts
- Topic: 6C.17
- Replies: 2
- Views: 143
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?
The book's justification is because of pKb, but how would we know that? Are we supposed to be able to calculate it?
- Sat Dec 07, 2019 4:01 pm
- Forum: Bronsted Acids & Bases
- Topic: FJ.7
- Replies: 1
- Views: 183
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 ...
- Fri Dec 06, 2019 1:25 pm
- Forum: Biological Examples
- Topic: Myoglobin and hemeglobin [ENDORSED]
- Replies: 1
- Views: 67
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??
heme complex + protein = myoglobin
4 myoglobin = hemoglobin
Also is one heme complex monodentate, but the myoglobin as a whole is tetradentate??
- Fri Dec 06, 2019 1:22 pm
- Forum: Naming
- Topic: oxidation number
- Replies: 3
- Views: 62
oxidation number
Can the oxidation number of the metal ever be above (IV)? I have never seen it higher so I'm just curious.
- Fri Dec 06, 2019 1:21 pm
- Forum: Significant Figures
- Topic: pH sig figs
- Replies: 9
- Views: 256
pH sig figs
Can someone explain how to do sig figs for pH I'm confused??
- Fri Dec 06, 2019 1:19 pm
- Forum: Photoelectric Effect
- Topic: kinetic Energy
- Replies: 2
- Views: 152
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?
- Fri Dec 06, 2019 1:16 pm
- Forum: Hybridization
- Topic: N-triple bond-N pi bond hybridization
- Replies: 4
- Views: 142
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??
- Fri Dec 06, 2019 1:12 pm
- Forum: Hybridization
- Topic: hybridization of lone pairs
- Replies: 4
- Views: 76
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?
- Fri Dec 06, 2019 1:08 pm
- Forum: Conjugate Acids & Bases
- Topic: Conjugate acids and bases
- Replies: 2
- Views: 63
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?
- 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: 206
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?
- Fri Dec 06, 2019 1:04 pm
- Forum: Naming
- Topic: writing formula of a given name
- Replies: 5
- Views: 117
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?
- Fri Dec 06, 2019 12:59 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Calculating KA
- Replies: 1
- Views: 34
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)
- Tue Dec 03, 2019 11:52 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: coordination number
- Replies: 3
- Views: 44
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.
- Tue Dec 03, 2019 11:49 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: coordination number
- Replies: 3
- Views: 44
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?
- Tue Dec 03, 2019 11:45 pm
- Forum: Naming
- Topic: naming email
- Replies: 2
- Views: 94
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?
- Tue Dec 03, 2019 11:30 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Substitution reaction [ENDORSED]
- Replies: 1
- Views: 51
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...
- Fri Nov 15, 2019 1:24 pm
- Forum: Dipole Moments
- Topic: IMFs
- Replies: 2
- Views: 51
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?
- Thu Nov 14, 2019 11:41 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 2E.3
- Replies: 3
- Views: 81
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 .
2E.3 Draw the structures and name the shapes of the following molecules: (a) HCN; (b) CH2F2 .
- Thu Nov 14, 2019 11:36 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: structure ?
- Replies: 8
- Views: 133
structure ?
How can you tell if something is linear or not?
- Wed Nov 06, 2019 12:22 pm
- Forum: Resonance Structures
- Topic: resonance hybrid
- Replies: 6
- Views: 99
resonance hybrid
should we know how to draw a resonance hybrid??
- Wed Nov 06, 2019 12:21 pm
- Forum: Lewis Structures
- Topic: 2B.11 part c
- Replies: 1
- Views: 44
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...
- Wed Nov 06, 2019 12:19 pm
- Forum: Lewis Structures
- Topic: Ionic Lewis structure
- Replies: 2
- Views: 61
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...
- Wed Nov 06, 2019 12:15 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: nomenclature
- Replies: 3
- Views: 141
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...
- Wed Nov 06, 2019 12:08 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: 1E.5
- Replies: 1
- Views: 129
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...
- Wed Nov 06, 2019 12:06 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: 1E.1
- Replies: 3
- Views: 148
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...
- Wed Nov 06, 2019 12:04 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: orbitals vs. subshells
- Replies: 4
- Views: 183
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?
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?
- Wed Nov 06, 2019 12:00 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: 1D.1
- Replies: 1
- Views: 103
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...
- Wed Nov 06, 2019 11:57 am
- Forum: Einstein Equation
- Topic: 1B.15
- Replies: 3
- Views: 171
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?
- Wed Nov 06, 2019 11:55 am
- Forum: Einstein Equation
- Topic: 1B.15
- Replies: 3
- Views: 171
Re: 1B.15
Im confused as well. Why would we use E=hv for this one?
- Wed Nov 06, 2019 11:52 am
- Forum: Einstein Equation
- Topic: 1B.9
- Replies: 5
- Views: 274
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?
- Wed Nov 06, 2019 11:47 am
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: 1A.15
- Replies: 1
- Views: 66
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...
- Wed Nov 06, 2019 11:44 am
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: 1A.11
- Replies: 3
- Views: 174
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?
Could someone explain this?
- Sun Oct 20, 2019 6:30 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Opposite Spin
- Replies: 5
- Views: 91
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...
- Sun Oct 20, 2019 6:28 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Series
- Replies: 3
- Views: 52
Re: Series
Figure 1A.10 in the text is a good visual of them
- Sun Oct 20, 2019 6:27 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: how to prepare
- Replies: 22
- Views: 327
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.
- 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: 162
Re: s-, p-, d- ,f- orbitals
2px: 2 level; p orbital; x-axis
- Sun Oct 20, 2019 6:24 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Nodal planes
- Replies: 3
- Views: 43
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.
- Sun Oct 20, 2019 6:22 pm
- Forum: Photoelectric Effect
- Topic: Speed of Light
- Replies: 29
- Views: 389
Re: Speed of Light
is it better to use 2.998 or 3?
- Sun Oct 20, 2019 6:20 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Best Way To Study?
- Replies: 56
- Views: 1321
Re: Best Way To Study?
Read the textbook and find other people in the class! Office hours help too!
- Sun Oct 20, 2019 6:19 pm
- Forum: Properties of Electrons
- Topic: x,y,z for Electrons
- Replies: 10
- Views: 156
Re: x,y,z for Electrons
Should we have to indicate x, y, z in answers?
- Sun Oct 20, 2019 6:12 pm
- Forum: Properties of Light
- Topic: Question 1A.3
- Replies: 3
- Views: 70
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 ...
- Thu Oct 03, 2019 9:07 pm
- Forum: Limiting Reactant Calculations
- Topic: Study Strategies/Youtube Videos
- Replies: 14
- Views: 286
Re: Study Strategies/Youtube Videos
I was looking for more resources for review and these are all super helpful!
- Thu Oct 03, 2019 9:00 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Quick Review of Operations Using Scientific Notation [ENDORSED]
- Replies: 1
- Views: 77
Re: Quick Review of Operations Using Scientific Notation [ENDORSED]
Thanks this was a helpful review.
- Thu Oct 03, 2019 8:54 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Homework Problem G17 Part B
- Replies: 2
- Views: 78
Re: Homework Problem G17 Part B
Example G2 on page F55 is a good example of this problem.
- Thu Oct 03, 2019 8:51 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: #E5 part b)
- Replies: 2
- Views: 83
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.
- Thu Oct 03, 2019 8:41 pm
- Forum: Empirical & Molecular Formulas
- Topic: Mass Percentage Composition Rounding
- Replies: 3
- Views: 83
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.