Search found 103 matches
- Sat Mar 14, 2020 11:52 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Arrhenius Equation
- Replies: 3
- Views: 294
Re: Arrhenius Equation
the Arrhenius equation is used to find the effect that changing of temperature in a reaction has on the rate constant
- Sat Mar 14, 2020 11:49 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: n in NFE
- Replies: 64
- Views: 2931
Re: n in NFE
n is referring the electrons transferred after balancing the half-reaction!
- Sat Mar 14, 2020 11:48 am
- Forum: Second Order Reactions
- Topic: Derivations of Reactions
- Replies: 5
- Views: 446
Re: Derivations of Reactions
I don't believe that we need to know how to derive the equations. the equations that are important should be on the formula sheet but will not be individually labelled.
- Sat Mar 14, 2020 11:44 am
- Forum: Environment, Ozone, CFCs
- Topic: final thoughts
- Replies: 3
- Views: 820
final thoughts
what is important to know about the environment, ozone, etc for the final?
- Sat Mar 14, 2020 11:41 am
- Forum: General Rate Laws
- Topic: Average rate vs unique rate
- Replies: 4
- Views: 382
Re: Average rate vs unique rate
referring to the aforementioned appearance/disappearance of substances, are you referring to intermediate substances? if not, what are the substances?
- Sat Mar 14, 2020 11:37 am
- Forum: First Order Reactions
- Topic: k versus k prime
- Replies: 6
- Views: 557
Re: k versus k prime
k prime refers to the reverse reaction while k refers to the forward reaction!
- Sat Mar 14, 2020 11:33 am
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: metal dissolution
- Replies: 3
- Views: 323
Re: metal dissolution
so an anode, because it is losing electrons, is dissolving in solution?
- Sat Mar 14, 2020 11:27 am
- Forum: Zero Order Reactions
- Topic: zero order reactions
- Replies: 5
- Views: 368
zero order reactions
how do you identify a zero order reaction?
- Sat Mar 14, 2020 11:22 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: inert gases
- Replies: 6
- Views: 407
Re: inert gases
what of the elements such as platinum that seem to be attached to a cell diagram?
- Fri Mar 13, 2020 6:35 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: relationship to cell potential
- Replies: 2
- Views: 272
relationship to cell potential
how would you explain the relationship between cell potential and work in words? and, for cell potential and free energy?
- Fri Mar 13, 2020 6:24 pm
- Forum: Balancing Redox Reactions
- Topic: intensive and extensive
- Replies: 3
- Views: 209
intensive and extensive
what makes a property intensive or extensive?
- Fri Mar 13, 2020 6:23 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: electrochemical series
- Replies: 4
- Views: 381
electrochemical series
in the outline, it mentions an electrochemical series. what is that referring to?
- Fri Mar 13, 2020 6:15 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: electromotive force
- Replies: 2
- Views: 158
electromotive force
what is electromotive force?
- Fri Mar 13, 2020 5:19 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: factors of Gibbs free energy
- Replies: 2
- Views: 250
factors of Gibbs free energy
why is reaction free energy dependent on pressure and the equilibrium constant?
- Fri Mar 13, 2020 4:49 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: relationship between entropy and enthalpy
- Replies: 2
- Views: 268
relationship between entropy and enthalpy
how ∆S is related to ∆H for a change at constant temperature and pressure?
- Fri Mar 13, 2020 4:30 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: 3rd law
- Replies: 3
- Views: 341
3rd law
what exactly is the third law of thermodynamics ?
- Thu Mar 05, 2020 11:12 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: same solutions in cell diagram
- Replies: 2
- Views: 201
same solutions in cell diagram
when you are writing a cell diagram like they have you do in the homework, when do you know that a molecule is in the same solution? and whenever it is in the same solution, it is written with the commas rather than the (|) and includes a inert gas correct?
- Thu Mar 05, 2020 11:09 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: inert gases
- Replies: 6
- Views: 407
inert gases
when do you include an inert gas in the cell diagram? and why is it only for one side (cathode or anode) or on both the cathode and anode?
- Sat Feb 22, 2020 4:34 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: E cell
- Replies: 6
- Views: 444
Re: E cell
there is an equation for E cell to solve but there will be information to find the variables in the equation.
- Sat Feb 22, 2020 4:32 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: metal dissolution
- Replies: 3
- Views: 323
metal dissolution
how can you tell when a metal can be dissolved in solution?
- Sat Feb 22, 2020 4:26 pm
- Forum: Balancing Redox Reactions
- Topic: Redox in Acid/ Basic Solutions
- Replies: 8
- Views: 496
Re: Redox in Acid/ Basic Solutions
the difference in acid or basic solutions is based on whether the situation calls for oxidation or reduction. In the case of reduction, the product will include a H+ but for oxidation it is OH-. the acronym OILRIG helps. oxidation is losing and reduction is gaining
- Sat Feb 22, 2020 4:19 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Adding Inert Gas
- Replies: 20
- Views: 1036
Re: Adding Inert Gas
adding an inert gas does not change the equilibrium constant for a system, but it will affect the pressure
- Sat Feb 22, 2020 4:15 pm
- Forum: Phase Changes & Related Calculations
- Topic: Van't Hoff Eq
- Replies: 8
- Views: 644
Re: Van't Hoff Eq
I don't believe it is necessary to understand how to derive for the equation.
- Sat Feb 22, 2020 4:14 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: n in -nFE
- Replies: 14
- Views: 801
Re: n in -nFE
n is the number of electrons transferred
- Tue Feb 11, 2020 10:51 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: adiabatic
- Replies: 19
- Views: 982
adiabatic
what is an adiabatic process?
- Mon Feb 10, 2020 7:14 pm
- Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
- Topic: degeneracy W
- Replies: 7
- Views: 534
degeneracy W
what does the n subscript represent in degeneracy? I have seen it as Avogadro's number or as the amount of moles..
- Mon Feb 10, 2020 7:10 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: equations
- Replies: 2
- Views: 125
equations
based on the lecture notes I have, the change in entropy equations from degeneracy and volume seem to be equivalent. ∆S= kbln(W2/W1) and ∆S= kbln(V2/V1) is what I have written... is this true?
- Mon Feb 10, 2020 2:50 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: equipartition theorem
- Replies: 2
- Views: 194
equipartition theorem
What exactly is the equipartition theorem? and how do you apply the corresponding constants properly?
- Mon Feb 10, 2020 12:57 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: extensive and intensive
- Replies: 1
- Views: 60
extensive and intensive
Is heat capacity an extensive property and if so, why? Also, is specific heat capacity an intensive property and if so, why?
- Sun Feb 09, 2020 8:55 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Le Chatelier's Principle
- Replies: 5
- Views: 277
Le Chatelier's Principle
when you are expanding a gaseous mixture, what is an indication of which side of the reaction is favored? What is the role of the amount of moles in the reactant and product side?
- Sun Feb 09, 2020 8:14 pm
- Forum: Ideal Gases
- Topic: reversing reactions
- Replies: 83
- Views: 4835
reversing reactions
what happens to K when you reverse a reaction?
- Thu Jan 30, 2020 10:21 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: hess's law
- Replies: 13
- Views: 303
hess's law
when using hess's law and cancelling out the data, does it matter if a molecule is on the product or reactant side to cancel with another? I know that they must have the same moles to cancel, but do they have to be on opposite sides of the reaction equation?
- Wed Jan 29, 2020 4:45 pm
- Forum: Ideal Gases
- Topic: non ideal gases
- Replies: 8
- Views: 430
Re: non ideal gases
ideal gases are for the purpose of creating a problem, gases are usually non ideal
- Wed Jan 29, 2020 4:40 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: System vs Surroundings
- Replies: 14
- Views: 2038
Re: System vs Surroundings
the system is were the chemical reaction would usually occur. I don't recall Professor Lavelle mentioning needing to memorize systems and surroundings.
- Wed Jan 29, 2020 4:37 pm
- Forum: Lewis Acids & Bases
- Topic: Lewis acid and bases
- Replies: 5
- Views: 389
Re: Lewis acid and bases
Lewis acids donate a proton (Hplus) and Lewis bases accept a proton.
- Wed Jan 29, 2020 4:36 pm
- Forum: Calculating Work of Expansion
- Topic: expansion vs nonexpansion
- Replies: 5
- Views: 186
Re: expansion vs nonexpansion
expansion work is done on its surroundings, and is affected by external pressure. but, non-expansion work occurs in a closed system without outside influence
- Wed Jan 29, 2020 4:31 pm
- Forum: Phase Changes & Related Calculations
- Topic: Why does steam cause burns?
- Replies: 29
- Views: 1111
Re: Why does steam cause burns?
steam causes burns because there is a phase change of water as it makes contact with your skin, which causes a greater release of energy than boiling water that has a constant energy
- Wed Jan 29, 2020 4:29 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Exothermic and Endothermic
- Replies: 11
- Views: 725
Re: Exothermic and Endothermic
the different in the sign values is a result of the action that occurs. so, for exothermic, since it releases heat, it will be negative. and because endothermic absorbs heat, it will be positive.
- Tue Jan 21, 2020 5:29 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Acids and Bases
- Replies: 7
- Views: 150
Re: Acids and Bases
There are a small amount of strong acids and bases that you should have memorized. Otherwise, acids are proton donors and usually produce hydronium. Bases are proton acceptors and produce hydroxide.
- Tue Jan 21, 2020 5:27 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: using K
- Replies: 5
- Views: 98
Re: using K
Kp is used for partial pressure and Kc is for equilibrium in a general sense.
- Tue Jan 21, 2020 5:25 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 5% approximation rule
- Replies: 5
- Views: 164
Re: 5% approximation rule
Dr.Lavelle said it is 10^-3.
- Tue Jan 21, 2020 11:44 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: effects on pH
- Replies: 7
- Views: 214
Re: effects on pH
Group 1/2 cations are considered spectator ions and therefore are insignificant.
- Tue Jan 21, 2020 11:40 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Q and K
- Replies: 8
- Views: 573
Re: Q and K
K is the reaction at equilibrium. Q is the reaction at any point. K greater than Q is a forward reaction. Q greater than K is a reverse reaction.
- Tue Jan 21, 2020 11:37 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Pressure changes
- Replies: 7
- Views: 182
Re: Pressure changes
I think of it like this. You want the products and reactants to be equal, hence equilibrium. So, if one side increases, the reaction shifts to the other side so that it may find equilibrium again.
- Tue Jan 21, 2020 11:32 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: units for pressure
- Replies: 5
- Views: 529
Re: units for pressure
I went to Lyndons workshop and he said because the values are very similar that either should be okay. Just to be consistent with the values throughout the problem.
- Tue Jan 21, 2020 11:31 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Reaction Quotient
- Replies: 10
- Views: 741
Re: Reaction Quotient
K is the reaction at equilibrium and Q occurs at any point in the reaction. When q<K, it is a forward reaction and the opposite is a reverse reaction.
- Tue Jan 21, 2020 11:27 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Kc vs K
- Replies: 7
- Views: 313
Re: Kc vs K
K is indicative of equilibrium and can be used with many subscripts. So, K can be applied to many equilibrium forms but Kc is simply the equilibrium constant.
- Tue Jan 21, 2020 11:24 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Checking the approximation of "x"
- Replies: 4
- Views: 140
Re: Checking the approximation of "x"
Because the value of x considerably small, I believe that the coefficient is insignificant because it has little effect on the value of x.
- Tue Jan 21, 2020 11:22 am
- Forum: Ideal Gases
- Topic: Acid and Bases
- Replies: 16
- Views: 498
Re: Acid and Bases
The scale of pH is 0 to 14. Anything below 7 is acidic and anything above is basic. 7 is neutral. These numbers can be obtained through the use of molarity in the pH=-log(x) formula
- Tue Jan 21, 2020 11:19 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Approximation
- Replies: 6
- Views: 219
Re: Approximation
Anything equal to or less than 10^-3 is considered by Lavelle as small.
- Tue Jan 21, 2020 11:18 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Difference in PH between strong and weak acids
- Replies: 11
- Views: 474
Re: Difference in PH between strong and weak acids
The strong acids have a lower pH because they fully dissociate and have a lower hydronium concentration. Weak acids are the opposite.
- Wed Jan 15, 2020 12:13 pm
- Forum: Ideal Gases
- Topic: bars vs atm
- Replies: 8
- Views: 237
bars vs atm
what is the difference of units in bars vs atm? which should we be using for solving problems?
- Wed Jan 15, 2020 12:11 pm
- Forum: Ideal Gases
- Topic: equilibrium constant
- Replies: 5
- Views: 163
equilibrium constant
I am confused about the exact function of the K constant value. Does K represent equilibrium in a general sense and then from there the subscript represents the type of equilibrium we are trying to acquire?
- Sat Dec 07, 2019 4:07 pm
- Forum: Air Pollution & Acid Rain
- Topic: acid rain
- Replies: 13
- Views: 1167
acid rain
what is the significance acid rain? what was said in the lecture about it?
- Sat Dec 07, 2019 2:15 pm
- Forum: Dipole Moments
- Topic: summarize dipole dipole moments
- Replies: 1
- Views: 184
summarize dipole dipole moments
im still a little confused about dipole dipole moments and I was confirm that this information is correct. dipole dipole moments occur when the partial charge does not cancel and only the same elements can cancel one another.. but that is also affects by molecular geometry because if the lone pair p...
- Sat Dec 07, 2019 1:59 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: atomic spectrum [ENDORSED]
- Replies: 1
- Views: 288
atomic spectrum [ENDORSED]
how do you apply the atomic spectrum to a problem in real life situations like they have done in the textbook?
- Fri Dec 06, 2019 3:08 pm
- Forum: Biological Examples
- Topic: biological significance
- Replies: 2
- Views: 209
biological significance
what are things of biological significance that we should know for the final?
- Fri Dec 06, 2019 2:53 pm
- Forum: Biological Examples
- Topic: Roman numerals
- Replies: 6
- Views: 307
Roman numerals
what is the formal for finding the Roman numeral for a coordination compound name?
- Fri Dec 06, 2019 2:11 pm
- Forum: Biological Examples
- Topic: Roman numerals
- Replies: 1
- Views: 166
Roman numerals
what is the formal for finding the Roman numeral for a coordination compound name?
- Fri Dec 06, 2019 1:58 pm
- Forum: Biological Examples
- Topic: overall stability constant
- Replies: 1
- Views: 107
overall stability constant
for K(a), I understand the it is the product/ [reactant][reactant]. but where does the numerical value come from? how do you use the equation to find the numerical value?
- Fri Dec 06, 2019 12:31 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: polarizability
- Replies: 4
- Views: 524
polarizability
do London dispersion forces have high polarizability?
- Fri Dec 06, 2019 12:29 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: finding molarity
- Replies: 4
- Views: 373
Re: finding molarity
Molarity of an acid and base is the same as molarity of any solution, which we learned about in the beginning of the quarter. It is simply the number of moles of solute divided by the total volume of the solution. However, for acids and bases specifically, we need to know how normal molarity relate...
- Thu Dec 05, 2019 4:46 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: finding molarity
- Replies: 4
- Views: 373
finding molarity
how do you find the molarity of an acid or base? is molarity what is used to find the pH, and resulting pOH?
- Sun Nov 24, 2019 11:45 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Seesaw shape
- Replies: 5
- Views: 228
Re: Seesaw shape
seesaw has 5 regions of electron density with one lone pair and four bonded pairs
- Sun Nov 24, 2019 11:44 pm
- Forum: Hybridization
- Topic: unused orbitals
- Replies: 4
- Views: 147
Re: unused orbitals
it is not a part of the hydride orbital so you would not include it in the hybridized orbital
- Sun Nov 24, 2019 11:40 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: T-shape
- Replies: 21
- Views: 1596
Re: T-shape
T-shape is with five regions of electron density, 2 lone pairs and 3 bonding pairs
- Sun Nov 24, 2019 11:38 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: AXE Format
- Replies: 34
- Views: 1075
Re: AXE Format
just writing the X and the E is good enough
- Tue Nov 19, 2019 11:12 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 bond
- Replies: 3
- Views: 122
hydrogen bond
when can a hydrogen bond occur?
- Sun Nov 17, 2019 5:15 pm
- Forum: SI Units, Unit Conversions
- Topic: Memorizing Conversions
- Replies: 25
- Views: 1286
Re: Memorizing Conversions
you should know the common ones because they will not ne given
- Sun Nov 17, 2019 5:11 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: linear versus angular
- Replies: 5
- Views: 386
Re: linear versus angular
A compound seems to be bent when there is a lone pair on the central atom because the lone pair repulse the bonding pairs and sightly displace them.
- Sun Nov 17, 2019 5:07 pm
- Forum: Electronegativity
- Topic: determining electronegativity
- Replies: 40
- Views: 5556
Re: determining electronegativity
the periodic trend of electronegativity is increasing up and to the right of the PT
- Sun Nov 17, 2019 5:04 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: geometric angles
- Replies: 4
- Views: 250
Re: geometric angles
In the shapes without lone pairs, the angles are fairly simple; usually the 360 divided by the amount of elements bonding.. when there is a lone pair on the central atom, that changes. The angles of the structures will vary as a result of the new high electron density region
- Sun Nov 17, 2019 5:01 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Repulsion
- Replies: 6
- Views: 295
Re: Repulsion
lone pairs have the highest repulsion, then lone-bonding, and bonding-bonding have the lowest repulsion
- Sun Nov 10, 2019 6:29 pm
- Forum: Dipole Moments
- Topic: Temporary Dipole Moment
- Replies: 3
- Views: 251
Re: Temporary Dipole Moment
Dipole moments display the polarity of a molecule; when one element has a greater charger, than the others, it is most polar and is a dipole moment.
- Sun Nov 10, 2019 6:22 pm
- Forum: Lewis Structures
- Topic: Electronegative
- Replies: 14
- Views: 799
Re: Electronegative
the periodic table trend of electronegativity is increasing up and to the right
- Sun Nov 10, 2019 6:18 pm
- Forum: Octet Exceptions
- Topic: Reasoning for Octet Exception
- Replies: 19
- Views: 1146
Re: Reasoning for Octet Exception
expanded octets occur in period 3 and below but they are most common in phosphorus, sulfur, and chlorine.
- Sun Nov 10, 2019 6:15 pm
- Forum: Dipole Moments
- Topic: Dipole Moment
- Replies: 6
- Views: 143
Re: Dipole Moment
a dipole moment occurs when a electron has a higher charger and so that electron is favored over another
- Wed Nov 06, 2019 1:22 pm
- Forum: Bond Lengths & Energies
- Topic: speed of electromagnetic radiation
- Replies: 2
- Views: 200
speed of electromagnetic radiation
how does wavelength and frequency affect the speed of electromagnetic radiation?
- Sun Nov 03, 2019 10:06 pm
- Forum: DeBroglie Equation
- Topic: Does something have wavelike properties?
- Replies: 3
- Views: 105
Re: Does something have wavelike properties?
any above 10^-15 m has wavelike properties
- Sun Nov 03, 2019 10:04 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Rules for n, l,m
- Replies: 11
- Views: 544
Re: Rules for n, l,m
N is the energy level (in discrete numbers)
l is the subshell that can be N-1 or less
Ml is the orientation and is from -l to l
Ms is the electron and is +/- 1/2
l is the subshell that can be N-1 or less
Ml is the orientation and is from -l to l
Ms is the electron and is +/- 1/2
- Sun Nov 03, 2019 10:01 pm
- Forum: Bond Lengths & Energies
- Topic: Why Are Double Bonds Shorter
- Replies: 16
- Views: 6025
Re: Why Are Double Bonds Shorter
double bonds are shorter than single bonds, and triple bonds are shorter than single bonds because the greater number fo the bond the more closely is it attracted to the nucleus, decreasing the atomic radius.
- Sun Nov 03, 2019 9:55 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 3
- Views: 136
Re: Formal Charge
You calculate formal charge to calculate the charge of the electron for resonance structures which will lead you to the most stable atom.
- Sun Nov 03, 2019 9:50 pm
- Forum: Ionic & Covalent Bonds
- Topic: Electron Configuration
- Replies: 7
- Views: 400
Re: Electron Configuration
yes.. also just to note the electron configuration of chromium and copper are exceptions to the regular configuration. Chromium is [Ar]3d^54s^1 and Copper is [Ar]3d^104s^1
- Sun Oct 27, 2019 3:20 pm
- Forum: Ionic & Covalent Bonds
- Topic: Double and single bond lengths
- Replies: 6
- Views: 242
Double and single bond lengths
why is the double bond length shorter than the single bond length? And, if it follows the pattern, is the triple bond shorter than both?
- Sun Oct 27, 2019 3:19 pm
- Forum: Ionic & Covalent Bonds
- Topic: ionization
- Replies: 5
- Views: 299
ionization
Can someone please explain the concept of ionization? How do you know that ionization energy is based off the period table?
- Sun Oct 27, 2019 3:17 pm
- Forum: Resonance Structures
- Topic: 'delocalized'
- Replies: 4
- Views: 131
Re: 'delocalized'
'Delocalized' electrons are electrons that have more fluidity in the atom because they are not bonded and are in different positions in a set of resonance structures.
- Sun Oct 27, 2019 3:07 pm
- Forum: Resonance Structures
- Topic: Resonance
- Replies: 8
- Views: 172
Re: Resonance
Resonance is the blending of structures, portraying the arrangement of atoms with different arrangements of electrons. From the different arrangements, the resonance represents the most stable structure and yes the most accurate lewis structure.
- Sun Oct 27, 2019 3:02 pm
- Forum: Resonance Structures
- Topic: Bond lenghts.
- Replies: 11
- Views: 380
Re: Bond lenghts.
Dr. Lavelle didn't mention us needing to know bond lengths. We just need to understand that the length of a single bond will not be equal to that of a double bond, and that resonance will portray that blending of structures with said bonds.
- Sun Oct 20, 2019 9:49 pm
- Forum: Photoelectric Effect
- Topic: The Work Function
- Replies: 15
- Views: 968
Re: The Work Function
the work function is the representation of the energy it takes to eject electrons from a metal and it is found with the equation E=hv.
- Sun Oct 20, 2019 9:44 pm
- Forum: DeBroglie Equation
- Topic: DeBroglie Equation
- Replies: 11
- Views: 310
Re: DeBroglie Equation
De Broglie's Equation is used to find wavelength, and the equation is H/(mass x velocity) so you are finding wavelike properties
- Sun Oct 20, 2019 9:35 pm
- Forum: Naming
- Topic: Naming Compounds (general question)
- Replies: 9
- Views: 437
Re: Naming Compounds (general question)
unless it is specified, it is unlikely that we have to memorize any for now
- Sun Oct 20, 2019 9:30 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: delta p
- Replies: 3
- Views: 81
Re: delta p
delta p is the change in momentum, it can be calculated by multiplying mass and velocity
- Tue Oct 15, 2019 5:59 pm
- Forum: Properties of Light
- Topic: Balmer and Lyman
- Replies: 1
- Views: 68
Balmer and Lyman
Can someone offer a more detailed explanation of the Balmer series and Lyman series?
- Sun Oct 13, 2019 9:53 pm
- Forum: Properties of Light
- Topic: Diffraction Patterns
- Replies: 2
- Views: 53
Re: Diffraction Patterns
Constructive interference are in-phases, in which the waves have matching peaks and troughs. Destructive interference are out-of-phase, in which the waves' peak will align with the trough. Diffraction is the result of interacting waves, when the peaks and troughs or peaks and peaks align with one an...
- Sun Oct 13, 2019 9:44 pm
- Forum: SI Units, Unit Conversions
- Topic: Accuracy vs Precision
- Replies: 11
- Views: 739
Re: Accuracy vs Precision
Precision has more to be with consistency in one area, even if not the bullseye as Professor Lavelle discussed, and accuracy is about the reaching the goal, or bullseye.
- Sun Oct 13, 2019 9:40 pm
- Forum: Photoelectric Effect
- Topic: Wavelength, Frequency, and Intensity
- Replies: 7
- Views: 1092
Re: Wavelength, Frequency, and Intensity
Shorter wavelengths have higher frequencies, which means more energy to eject electron.. which is why the electrons are reactive to short wavelengths. And, the wavelength is not effected by the intensity of the light source, so there will not be more energy in the photons.
- Sun Oct 13, 2019 9:31 pm
- Forum: Photoelectric Effect
- Topic: De Broglie's Equation
- Replies: 5
- Views: 237
Re: De Broglie's Equation
De Broglie's equation is used to find wavelength.
- Sun Oct 13, 2019 9:26 pm
- Forum: Photoelectric Effect
- Topic: Photons
- Replies: 2
- Views: 169
Photons
Is light the compilation of photons? What is their relationship to one another? I need clarification....
- Sun Oct 06, 2019 2:24 pm
- Forum: Empirical & Molecular Formulas
- Topic: What decimal place to round to when taking masses from the Periodic Table?
- Replies: 19
- Views: 2895
Re: What decimal place to round to when taking masses from the Periodic Table?
I would recommend using the entire number to begin with so you have the most accurate answer and then when you have the solution you can use sig figs to decide where to round.
- Sun Oct 06, 2019 2:21 pm
- Forum: Limiting Reactant Calculations
- Topic: Finding the limiting reaction
- Replies: 3
- Views: 233
Finding the limiting reaction
When finding the limiting reaction, where does the molar ratio come into play? Limiting reactants are a topic I’m struggling to grasp. Is there a ste by step way to go about solving the problems?