Search found 74 matches
- Sun Mar 17, 2019 9:15 pm
- Forum: Zero Order Reactions
- Topic: Zero Order Rxn
- Replies: 7
- Views: 872
Zero Order Rxn
zero order is only dependent on the rate constant correct?
- Thu Mar 14, 2019 12:23 am
- Forum: General Rate Laws
- Topic: Problem 7A. 3 7th edition
- Replies: 3
- Views: 480
Re: Problem 7A. 3 7th edition
Oh I see what you mean. Just what happens to the negative?
- Wed Mar 13, 2019 7:15 pm
- Forum: General Rate Laws
- Topic: Problem 7A. 3 7th edition
- Replies: 3
- Views: 480
Problem 7A. 3 7th edition
the equation C2H4(g) + 3O2(g)--> 2CO2(g) + 2H2O(g) and unique rate of reaction = 0.44 mol L^-1 s^-1 is given it asks to find the rate at which O2 reacts. The solutions manual says to multiply 0.44 mol L^-1 s^-1(3) which gives you 1.3 mol L^-1 s^-1. I thought that for a unique average rate the equati...
- Wed Mar 13, 2019 10:25 am
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: Initial Rates given in mmmol
- Replies: 2
- Views: 613
Initial Rates given in mmmol
If you are give initial rate in an experiment in mmol/L x s then you would have to convert the moles to x10^-3 mol in order to get your final units in moles correct?
- Tue Mar 12, 2019 9:39 pm
- Forum: General Rate Laws
- Topic: Reaction rate
- Replies: 1
- Views: 349
Reaction rate
S2O8 ^-2 + 3I- --> 2SO4^2- + I3- Rate of consumption of S2O8^2- = k [S2O8^2-] [I-] The book says that doubling either the S2O8 ^2- ion concentration or the I- ion concentration doubles the reaction rate. I am confused as to what exactly the reaction rate is. Is it k? or is it the whole reaction: Rat...
- Sun Mar 10, 2019 1:54 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Ratio of Rate constants = equilibrium constant, K
- Replies: 1
- Views: 521
Ratio of Rate constants = equilibrium constant, K
In the equation (k/k') = K(eq. constant). Is the K (eq. constant) the same K as used in an acid/base rxn?
- Sun Mar 10, 2019 1:52 pm
- Forum: Zero Order Reactions
- Topic: How can you tell a reaction zero order?
- Replies: 4
- Views: 590
How can you tell a reaction zero order?
Since rate does not depend on the concentration of the reactant in a zero order rxn then would it be safe to assume that there is no rate law for a zero order rxn?
- Sun Mar 10, 2019 1:50 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Molecularity
- Replies: 3
- Views: 483
Molecularity
In lecture, Lavelle mentioned how unimolecularity exists in an A--> P reaction. I was not able to catch when he said how does one reactant collide with itself. Can someone explain please.
- Sat Mar 02, 2019 1:33 am
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: salt bridge
- Replies: 4
- Views: 563
Re: salt bridge
I think that this video helps to explain the galvanic cell with the salt bridge https://www.youtube.com/watch?v=7b34XYgADlM .
- Mon Feb 25, 2019 10:32 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: half reactions for problem 6L.5 c 7th edition
- Replies: 1
- Views: 233
half reactions for problem 6L.5 c 7th edition
It says to write the half-reaction for Cl2(g) +H2(g)--> HCL (aq)
i thought that it would be for the
reduction: 2H+ (aq) + Cl2(g) + 2e- --> HCl(aq)
but on the solution manual it says that the answer is Cl2(g) + 2e- --> 2Cl-
Why is that? Can someone explain this please.
i thought that it would be for the
reduction: 2H+ (aq) + Cl2(g) + 2e- --> HCl(aq)
but on the solution manual it says that the answer is Cl2(g) + 2e- --> 2Cl-
Why is that? Can someone explain this please.
- Mon Feb 25, 2019 9:27 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Pt inert electrode
- Replies: 9
- Views: 1814
Pt inert electrode
Hi, I am not sure exactly when to use Pt as the electrode. Can anybody please explain and give an example?
- Fri Feb 22, 2019 9:53 pm
- Forum: Balancing Redox Reactions
- Topic: Galcanic cell
- Replies: 3
- Views: 395
Galcanic cell
What exactly is a galvanic cell? is that different from a voltaic cell?
- Fri Feb 22, 2019 9:52 pm
- Forum: Balancing Redox Reactions
- Topic: Redox Rxn
- Replies: 3
- Views: 444
Re: Redox Rxn
The typical ones of group one are +1 and group 2 are +2. the halogens are -1 and oxygen is -2.
- Fri Feb 22, 2019 9:50 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Calculating E naught of the cell
- Replies: 3
- Views: 442
Calculating E naught of the cell
Just to be clear, there are two ways to calculate e nuaght of the cell?
Its E naught of the cell= e naught of the cathode - e naught of the anode and the other one is using the reduction potentials?
Its E naught of the cell= e naught of the cathode - e naught of the anode and the other one is using the reduction potentials?
- Mon Feb 18, 2019 4:56 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs Free Energy and equilibrium
- Replies: 2
- Views: 339
Gibbs Free Energy and equilibrium
In lecture on Friday in the notes it said if G(r) does not equal G(p) then the system (rxn) is not at equilibrium. Can someone explain why that is?
- Mon Feb 18, 2019 4:54 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: state functions and properties
- Replies: 11
- Views: 6040
Re: state functions and properties
A state property is one where the start and the end of the function only matter rather than the path taken.
- Mon Feb 18, 2019 4:51 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Delta G a state function?
- Replies: 23
- Views: 2842
Delta G a state function?
Is Delta G a state function since it is additive?
- Mon Feb 18, 2019 4:47 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: standard Gibbs Free Energy
- Replies: 4
- Views: 541
standard Gibbs Free Energy
Standard Gibbs Free Energy is under standard conditions compared to that of gibbs free energy?
- Thu Feb 07, 2019 8:59 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Isolated System
- Replies: 4
- Views: 418
Isolated System
Can someone please help with the question.
If an isolated system contained +100kJ of energy after 100 years what is delta U?
If an isolated system contained +100kJ of energy after 100 years what is delta U?
- Thu Feb 07, 2019 8:50 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Work
- Replies: 3
- Views: 428
Work
When work is done on its surrounding that means work is done by the system, therefore, it is negative right?
- Thu Feb 07, 2019 8:48 pm
- Forum: Phase Changes & Related Calculations
- Topic: Units of enthalpy
- Replies: 5
- Views: 566
Units of enthalpy
What are the correct units for enthalpy?
- Sun Feb 03, 2019 4:52 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: q=-q
- Replies: 4
- Views: 2107
Re: q=-q
This equation is just saying that the heat that is released by the system is equal to the negative amount of heat absorbed by the surroundings.
- Sun Feb 03, 2019 4:45 pm
- Forum: Phase Changes & Related Calculations
- Topic: Heating and Cooling Curve
- Replies: 2
- Views: 348
Heating and Cooling Curve
Just to make sure the cooling curve would just be starting from the end of the heating curve and then going down?
- Sun Feb 03, 2019 4:42 pm
- Forum: Phase Changes & Related Calculations
- Topic: Drawing a heating curve
- Replies: 6
- Views: 1122
Re: Drawing a heating curve
I do not think you have to go so detailed on the heating curve. As long as your temperatures match up with when it freezes and heats. I provided a link with a heating curve which I think is a pretty good example. Hope it helps! https://s3-us-west-2.amazonaws.com/courses-images/wp-content/uploads/sit...
- Sat Jan 26, 2019 4:37 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: In the last lecture
- Replies: 3
- Views: 389
Re: In the last lecture
Essentially he was saying that you require more energy to break a double bonded carbon atom (c=c) vs a single bonded atom (c-c). And that energy is required to break a bond and that to form bond energy is released.
- Sat Jan 26, 2019 3:59 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess's Law
- Replies: 5
- Views: 461
Hess's Law
For Hess's Law do you essentially just manipulate both equations to get the equation that you need and then add both enthalpies?
- Wed Jan 23, 2019 4:43 pm
- Forum: Administrative Questions and Class Announcements
- Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
- Replies: 179
- Views: 24213
Re: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
Can someone explain how to do number 4b on worksheet 1. I do not seem to understand the steps to take. The Haber process is used to synthesize ammonia gas (NH ) from nitrogen gas ( ) 3 N2 and hydrogen gas ( H ). A system at equilibrium contains 1.85M H2 1.36M N2 and 2.91 x 10 ^−3 NH3 at a constant t...
- Fri Jan 18, 2019 6:47 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Understanding Q
- Replies: 9
- Views: 770
Understanding Q
Just to clarify, Q is the same chemical reaction but just in the state where it has not yet reached equilibrium?
- Fri Jan 18, 2019 6:46 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Temperature Affecting equilibrium constant
- Replies: 2
- Views: 317
Temperature Affecting equilibrium constant
If the equilibrium constant can only be affected by temperature how would it change? Like if the temperature increased would the equilibrium constant increase/ decrease. Or is that something we are not supposed to know?
- Fri Jan 18, 2019 6:42 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Inert Gas added
- Replies: 4
- Views: 312
Inert Gas added
What will happen when an inert gas is introduced into a chemical equilibrium?
- Fri Jan 11, 2019 4:26 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 7th Edition Question 5G.3 B
- Replies: 2
- Views: 254
Re: 7th Edition Question 5G.3 B
Thanks! :)
- Thu Jan 10, 2019 8:45 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Q vs K
- Replies: 5
- Views: 445
Q vs K
Is Q just the calculation of a reaction that has not yet reached equilibrium?
- Thu Jan 10, 2019 8:44 pm
- Forum: Ideal Gases
- Topic: Pv=nRT [ENDORSED]
- Replies: 12
- Views: 791
Pv=nRT [ENDORSED]
I just wanted to make sure that the units for temperature in this equation is supposed to be in Kelvin?
- Thu Jan 10, 2019 8:38 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 7th Edition Question 5G.3 B
- Replies: 2
- Views: 254
7th Edition Question 5G.3 B
5G.3 Write the expression for K for each of the following reaction. 4NH(3) + 6NO --> 7N(2) + 6H(2)O <-- I was checking if the equation was balanced and saw that nitrogen was not. But in the solution manual it has the expression of K using these coefficients. Answer: K= (P N2) ^7 (PH2O)^6/ (PNH3)^4 (...
- Sat Dec 08, 2018 8:33 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Question 6B3
- Replies: 1
- Views: 165
Question 6B3
A careless laboratory technician wants to prepare 200.0 ml of a 0.0025 M HCl (aq) solution but uses a volumetric flask of volume 250.0 mL by mistake. What will be the actual pH of the solution. On the solutions manual it says that the answer is -log(200.00ml x 0.0025 M/ 250.0) which equals 1.7. I do...
- Fri Dec 07, 2018 1:48 am
- Forum: Biological Examples
- Topic: Myoglobin [ENDORSED]
- Replies: 3
- Views: 718
Myoglobin [ENDORSED]
Is myoglobin hexadentate? because I know that the porphyrin is tetradentate but then when the iron atom binds with the histidine and that oxygen would that make it hexadentate?
- Fri Dec 07, 2018 1:45 am
- Forum: Biological Examples
- Topic: Shape of Myoglobin
- Replies: 3
- Views: 232
Re: Shape of Myoglobin
Oh okay, thank you so then if oxygen were not bound then it would be square pyramidal?
- Fri Dec 07, 2018 1:44 am
- Forum: Biological Examples
- Topic: Shape of Myoglobin
- Replies: 3
- Views: 232
Re: Shape of Myoglobin
Oh okay, thank you so then if oxygen were not bound then it would be square pyramidal?
- Fri Dec 07, 2018 12:36 am
- Forum: Biological Examples
- Topic: Shape of Myoglobin
- Replies: 3
- Views: 232
Shape of Myoglobin
I was wondering what would the shape of myoglobin be? I was thinking that it would be octahedral since it has 6 regions of electron densities. Is that right?
- Sat Dec 01, 2018 3:11 pm
- Forum: Naming
- Topic: Problem 9C.3 7th Edition
- Replies: 1
- Views: 167
Problem 9C.3 7th Edition
The question asks to write the formula for potassium hexacyanidochromate(III). The answer is K3[Cr(CN)6]
I don't understand how potassium got to have the subscript 3. Can someone explain please.
I don't understand how potassium got to have the subscript 3. Can someone explain please.
- Wed Nov 28, 2018 12:17 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: ionic molecule
- Replies: 3
- Views: 350
ionic molecule
Would an ionic molecule have London-dispersion forces?
- Tue Nov 27, 2018 9:27 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: ion-ion bond vs. H-bond
- Replies: 4
- Views: 756
ion-ion bond vs. H-bond
What type of intermolecular forces would be stronger? An ion-ion or an H-bond and why?
- Fri Nov 23, 2018 11:05 pm
- Forum: Hybridization
- Topic: Hybridization of large molecules
- Replies: 2
- Views: 398
Hybridization of large molecules
To obtain the hybridization of a large molecule like caffeine for example, C8H10N4O2, you just look at the central atoms right?
- Fri Nov 23, 2018 11:01 pm
- Forum: Hybridization
- Topic: double bonds
- Replies: 14
- Views: 1249
double bonds
Just to make sure, a pi bond consists of a sigma and pi bond?
- Tue Nov 20, 2018 8:23 pm
- Forum: Hybridization
- Topic: S- Character of Hybrids [ENDORSED]
- Replies: 1
- Views: 378
S- Character of Hybrids [ENDORSED]
Hi, can anyone help me understand 2F.15 from the 7th Edition. Question: Noting that the bond angle of a sp^3 hybridized atom is 109.5 degrees and that of an sp^2 hybridized atom is 120 degrees, do you expect the bond angle between two hybrid orbitals to increases or decrease as the s-character of th...
- Sat Nov 17, 2018 12:44 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: AX3E2 Shape
- Replies: 6
- Views: 1235
Re: AX3E2 Shape
This is a T-shaped molecular geometry but it has a an arrangement of electron density of trigonal bipyramidal. The bond angles are <180 degrees and <90 degress. With a hybridization of sp^3d.
- Sat Nov 17, 2018 12:40 pm
- Forum: Hybridization
- Topic: Hybridization for VSPER model
- Replies: 2
- Views: 224
Hybridization for VSPER model
Hi, I just wanted to make sure that a double bond or a triple bond counts as one electron cloud right?
- Sat Nov 17, 2018 12:36 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Square Pyramidal
- Replies: 2
- Views: 321
Re: Square Pyramidal
They also have less than 90 degrees bond angles. :)
- Tue Nov 13, 2018 10:19 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 2E5 HW Problem on 7th Edition
- Replies: 2
- Views: 158
Re: 2E5 HW Problem on 7th Edition
Thank You! That helps a lot !
- Mon Nov 12, 2018 10:17 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 2E5 HW Problem on 7th Edition
- Replies: 2
- Views: 158
2E5 HW Problem on 7th Edition
2E5. What is the shape of a ClO2+ ion? b) what is the expected OClO bond angle?
Can someone help me with this problem? I do not understand how this ion is trigonal planar.
Can someone help me with this problem? I do not understand how this ion is trigonal planar.
- Sat Nov 10, 2018 3:29 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: Hydrogen Bonds
- Replies: 14
- Views: 1049
Hydrogen Bonds
Are hydrogen bonds a type of dipole-dipole bonds? And what are the atoms that it can bond with?
- Fri Nov 09, 2018 3:47 pm
- Forum: Lewis Structures
- Topic: Electrons on Least EN Atom
- Replies: 3
- Views: 547
Re: Electrons on Least EN Atom
I usually put the remaining valence electrons, that are left after using the ones from bonding the elements, around the most electronegative atoms (which are the elements on the outside) and if there are electrons that are still remaining I will put them on the least electronegative element (the one...
- Fri Nov 09, 2018 3:43 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Polarizability Vs. Polarizing Power
- Replies: 3
- Views: 693
Polarizability Vs. Polarizing Power
Can someone please explain the difference between Polarizability and Polarizing Power. I did not quite understand the difference between each two.
- Fri Nov 09, 2018 3:41 pm
- Forum: Bond Lengths & Energies
- Topic: bond angles
- Replies: 3
- Views: 436
Re: bond angles
I believe that the bond angle degree will always remain the same with the VSEPR model that it corresponds with because. For example,http://images.tutorcircle.com/cms/images/44/vsepr-model-chart.png has an image of the many compounds that have the same molecular shape that corresponds to a certain de...
- Tue Nov 06, 2018 12:24 am
- Forum: Lewis Structures
- Topic: Sodium Hypochlorite
- Replies: 2
- Views: 561
Sodium Hypochlorite
In Sodium Hypochlorite does the pre-fix hypo signify an oxygen atom?
- Thu Nov 01, 2018 11:37 pm
- Forum: Properties of Electrons
- Topic: Test #2 Question 3C
- Replies: 2
- Views: 609
Re: Test #2 Question 3C
In an x-ray photoelectron experiment, chromium metal is irradiated with light of wavelength 9.020x10 ^-11 m
b) How does KE of the e- change as x-ray intensity is increased?
c) Calculate the wavelength of the ejected electron.
Can you please explain both.
b) How does KE of the e- change as x-ray intensity is increased?
c) Calculate the wavelength of the ejected electron.
Can you please explain both.
- Wed Oct 31, 2018 8:08 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Degenerate Orbitals
- Replies: 1
- Views: 330
Degenerate Orbitals
How many degenerate 3p orbitals exist? Can someone explain with detail and an example?
- Wed Oct 31, 2018 7:55 pm
- Forum: Properties of Electrons
- Topic: Test #2 Question 3C
- Replies: 2
- Views: 609
Test #2 Question 3C
For this question, I used the kinetic energy formula to calculate the velocity of the electron and got 6.626 x 10 ^-25 m/s. And then used the wavelength = h/mv to find the wavelength of the electron. I plugged in the given and got wavelength= (6.626 x 10^-34 Js) /((9.1095x 10 ^31 kg) (6.626 x 10 ^-2...
- Thu Oct 25, 2018 10:08 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Nodal Planes on f-orbitals
- Replies: 4
- Views: 2086
Re: Nodal Planes on f-orbitals
That makes sense it just increases by 1. So then the nodal planes is related to the shape of the orbital?
- Thu Oct 25, 2018 10:05 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Nodal Planes on f-orbitals
- Replies: 4
- Views: 2086
Nodal Planes on f-orbitals
How many nodal planes would an f- orbital have? Can someone explain it with details?
- Thu Oct 25, 2018 10:03 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: m with subscript l
- Replies: 4
- Views: 575
Re: m with subscript l
m subscript (l) has the name magnetic. It specifies the orbitals of the shells and indicates the orientation.
- Fri Oct 19, 2018 7:45 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Multi-Electron Atoms
- Replies: 2
- Views: 292
Re: Multi-Electron Atoms
From what I understood, it is about 2 specific concepts 1) Magnitude of the charge 2) distance b/w them q1 : charge 1 and q2: charge 2 and r is the distance b/w the charges.
- Fri Oct 19, 2018 7:23 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Uncertainty in the velocity
- Replies: 1
- Views: 214
Uncertainty in the velocity
Can someone remind me of when a certain delta v answer u is not possible to have? I just remember that it had something to do with comparing it to the speed of light constant.
- Fri Oct 19, 2018 7:15 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electrostatic Attraction
- Replies: 5
- Views: 4943
Electrostatic Attraction
I understand how the inner electrons shield the outer electrons from the electrostatic attraction of the nucleus because they are in front of the outer electrons. But what exactly is the electrostatic attraction?
- Fri Oct 19, 2018 7:04 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: 4th Quantum number m subscript s
- Replies: 1
- Views: 369
4th Quantum number m subscript s
Can someone help me understand the meaning behind m subscript s again? I know that one of m subscript s is +1/2 and -1/2.
- Fri Oct 19, 2018 7:04 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: 4th Quantum number m subscript s [ENDORSED]
- Replies: 1
- Views: 285
4th Quantum number m subscript s [ENDORSED]
Can someone help me understand the meaning behind m subscript s again? I know that one of m subscript s is +1/2 and -1/2.
- Fri Oct 12, 2018 3:08 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Wave Properties of electrons
- Replies: 2
- Views: 191
Wave Properties of electrons
I was having trouble understanding what diffraction patterns were. The professor mentioned constructive (waves in phase) and destructive interference (waves out of phase). Are were supposed to know how to draw those or just understand the concept of them. And if so can you please explain.
- Fri Oct 12, 2018 2:46 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Wavelength Worked Example from Lecture
- Replies: 3
- Views: 116
Wavelength Worked Example from Lecture
Worked Example: If you are driving a 1.50 x 10 ^(3) car at 27.0 m(s^-1). What is the De Broglie wavelength of your car? Does your car have any measurable wavelength properties? wavelength= h/p = -h/mv = (6.626 x 10 ^ (-34) J(s)) / ( 1.50 X 10 ^3 kg) (27.0 m(s^-1)) = 1.64 x 10 ^ (-38) m In the lectur...
- Fri Oct 12, 2018 2:24 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Explain an example in Lecture
- Replies: 3
- Views: 171
Re: Explain an example in Lecture
The reason why the energy becomes positive is that when an electron releases energy it releases a photon of electromagnetic energy which is positive. So when something is absorbed it is positive. That is because due to the law of conservation of energy, energy can not be destroyed. Hopefully, that m...
- Thu Oct 04, 2018 11:43 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Moles and Molar Mass
- Replies: 10
- Views: 609
Re: Moles and Molar Mass
@Jovian thank you! :)
- Thu Oct 04, 2018 11:29 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Moles and Molar Mass
- Replies: 10
- Views: 609
Re: Moles and Molar Mass
Actually I saw what I did it was a calculator mistake.
- Thu Oct 04, 2018 11:22 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Moles and Molar Mass
- Replies: 10
- Views: 609
Re: Moles and Molar Mass
Thank You. I did the problem the way that you guys told me but I seem to be getting a different answer. I got 1.73 x 10 ^38.
This is what I did.
1.0 mol Ag x (6.0221x10^23 / 1 mol Ag) x (288 pm /1 atom) x (1m/ 10 ^-12 pm) = 1.73 x10 ^38 m.
This is what I did.
1.0 mol Ag x (6.0221x10^23 / 1 mol Ag) x (288 pm /1 atom) x (1m/ 10 ^-12 pm) = 1.73 x10 ^38 m.
- Thu Oct 04, 2018 10:47 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Moles and Molar Mass
- Replies: 10
- Views: 609
Moles and Molar Mass
Hey guys, I was wondering if anyone could please explain how to do E1. I was having trouble understanding how to start off. Is there a certain equation that needs to be used? E1: The field of the technology offers some intriguing possibilities, such as the creation of fibers one atom wide. Suppose y...
- Sat Sep 29, 2018 6:10 pm
- Forum: SI Units, Unit Conversions
- Topic: How does grading for discussion posts work?
- Replies: 80
- Views: 8885
Readings for Class
Hi, I am confused about the readings that we need to do for class since there is not a topic for each week in the syllabus. For example, would the Review of Chemical and Physical Principles fundamentals be for Monday's lecture week 1?