Search found 58 matches
- Sat Mar 17, 2018 12:03 am
- Forum: Zero Order Reactions
- Topic: graph of 0 order
- Replies: 10
- Views: 1954
Re: graph of 0 order
It would be a negative slope linear line. Y axis is reaction concentration, whose interaction is A0. The x axis is time, as time goes, the reactants consumes and its concentration decreases
- Sat Mar 17, 2018 12:00 am
- Forum: First Order Reactions
- Topic: Negative Orders
- Replies: 5
- Views: 902
Re: Negative Orders
It can be negative, which means as the substances decreases , the reaction rates increases. Try to think of the relationships between products and forward reaction
- Fri Mar 16, 2018 11:59 pm
- Forum: Limiting Reactant Calculations
- Topic: Reactant vs. Reagent [ENDORSED]
- Replies: 23
- Views: 34425
Re: Reactant vs. Reagent [ENDORSED]
Reactant is something that truest reacts ( chemical changes)
Regent is things that is used in the chemical reaction, which do not necessarily to be chemically changed
Regent is things that is used in the chemical reaction, which do not necessarily to be chemically changed
- Fri Mar 16, 2018 11:56 pm
- Forum: General Rate Laws
- Topic: Writing out states for rate laws
- Replies: 4
- Views: 823
Re: Writing out states for rate laws
I think we do not have to do so. But it is necessary to make sure that the units are all correct
- Sun Mar 11, 2018 1:38 pm
- Forum: First Order Reactions
- Topic: Log vs ln
- Replies: 9
- Views: 1198
Re: Log vs ln
Since you can get the answer in both ways so that I don't see a real need to convert ln to log. If it makes calculation easier for you, then it is o.
- Sun Mar 11, 2018 1:37 pm
- Forum: Zero Order Reactions
- Topic: graph of 0 order
- Replies: 10
- Views: 1954
Re: graph of 0 order
The graph is a linear line with time against [A]. The slope is negative, which equals to -k. The interaction point with y-axis is [A]0, which is the initial concentration of the reactant.
- Sun Mar 11, 2018 1:34 pm
- Forum: General Rate Laws
- Topic: Stoichiometric coefficients and order
- Replies: 5
- Views: 1111
Re: Stoichiometric coefficients and order
You can tell the reaction rate equation by simply looking at its chemical equation.
Rate equation is determined by experiment.
Only it works if the chemical reaction is a mechanical step of the reaction.
Rate equation is determined by experiment.
Only it works if the chemical reaction is a mechanical step of the reaction.
- Sun Mar 11, 2018 1:32 pm
- Forum: General Rate Laws
- Topic: Unique Reaction Rates [ENDORSED]
- Replies: 45
- Views: 162448
Re: Unique Reaction Rates [ENDORSED]
I will say the rate of a chemical reaction is the change in concentration over the change in time and is a metric of the "speed" at which a chemical reactions occurs.
And Unique rate is the rate occurs per unit of each molecules
And Unique rate is the rate occurs per unit of each molecules
- Fri Mar 02, 2018 9:20 am
- Forum: Zero Order Reactions
- Topic: Units of k [ENDORSED]
- Replies: 13
- Views: 1460
Re: Units of k [ENDORSED]
Since Rate= mol•L^-1•S^-1
AND [A]= mol•L-1
First order rate = K1*[A]
And calculate the unit of K1
AND [A]= mol•L-1
First order rate = K1*[A]
And calculate the unit of K1
- Fri Mar 02, 2018 9:15 am
- Forum: General Rate Laws
- Topic: Unique Rate [ENDORSED]
- Replies: 5
- Views: 805
Re: Unique Rate [ENDORSED]
If 2A+3B—>5C
Unique rate equals to -1/2 * d[A]/dt = -1/3 * d[B]/dt=+1/5 * d[C]/dt
Unique rate equals to -1/2 * d[A]/dt = -1/3 * d[B]/dt=+1/5 * d[C]/dt
- Fri Mar 02, 2018 9:12 am
- Forum: *Complex Reaction Coordinate Diagrams
- Topic: Unique Rate. [ENDORSED]
- Replies: 4
- Views: 2389
Unique Rate. [ENDORSED]
What’s unique rate in a chemical reaction?
- Fri Feb 23, 2018 1:27 am
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: homework 14.51
- Replies: 1
- Views: 333
homework 14.51
why the cell uses two silver electrode then Ecell is zero
isn't Ecell depending on the concentration of solutions ?? ( which means the K=1)
isn't Ecell depending on the concentration of solutions ?? ( which means the K=1)
- Fri Feb 23, 2018 1:19 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Homework 14.41
- Replies: 2
- Views: 427
Homework 14.41
Why the solution manuals writes Ecell*=0 for b) part as the concentration of H+ are not equal for reactants and products.
- Fri Feb 23, 2018 12:40 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Textbook Problem
- Replies: 2
- Views: 362
Textbook Problem
The textbook writes that (RT/F) ln 10 = (0.026 93 V) * 2.303 = 0.0592 V at 25 C, Ecell =Ecell'- (ET/F)ln10*og{H+} =Ecell'+ .0592 V* pH It is on the page 591, which is section 14.11 why equation changes the sign from "plus" to "minus" if (RT/F) ln 10 = (0.026 93 V) * 2.303 = 0.059...
- Sun Feb 18, 2018 8:06 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagrams
- Replies: 2
- Views: 450
Re: Cell Diagrams
Usually, anode is on the left, and the cathode is on the right. There are a wire connects the two part together. Besides, it needs a salt bright to balance the charge difference.
- Sun Feb 18, 2018 8:04 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Change in Entropy in Surroundings [ENDORSED]
- Replies: 2
- Views: 428
Re: Change in Entropy in Surroundings [ENDORSED]
First, you can think of that everything is constant in the universe
Then, since Stotal=q(total)/T
Qtotal=zero
Stotal=0
Then, since Stotal=q(total)/T
Qtotal=zero
Stotal=0
- Sun Feb 18, 2018 7:56 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Concentration Cells
- Replies: 2
- Views: 419
Re: Concentration Cells
For example, when a cell has lower concentration of glucose of the cell than that outside of the cell, It needs to use Na+,K+pump to create electrochemical gradient. The pump does work and create concentration difference to produce potential energy to perform actions
- Sun Feb 18, 2018 7:52 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Nernst equation
- Replies: 2
- Views: 378
Re: Nernst equation
These two equation are essentially the same. There are two different form of the same equation. The only difference is that log has 10 as its base and ln has e as its base. However, adding the constant make the two value the same. If you want to apply the same thing to other equation, I would sugges...
- Sun Feb 11, 2018 6:15 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: entropy and moles
- Replies: 2
- Views: 2465
Re: entropy and moles
TURE, remember the equation S=k*lnW, and W=(number of different micro-states for each molecule) ^ (number of molecule)
if the number of molecules increases, S definitely increases
if the number of molecules increases, S definitely increases
- Sun Feb 11, 2018 6:11 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Entropy Equation
- Replies: 4
- Views: 483
Re: Entropy Equation
Yes, you can only use the equation s=Qrev/T when it is a reversible expansion.
- Sun Feb 11, 2018 6:05 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: signs
- Replies: 3
- Views: 422
Re: signs
That's how Pro.Lavelle emphasizes in the lecture.
Positive signs mean gaining ENG and Negative signs mean giving ENG.
Probably for more accurate calculation and emphasize the direction of ENG flows.
Positive signs mean gaining ENG and Negative signs mean giving ENG.
Probably for more accurate calculation and emphasize the direction of ENG flows.
- Sun Feb 04, 2018 2:23 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Heat transfer to a liquefied gas.
- Replies: 2
- Views: 424
Re: Heat transfer to a liquefied gas.
I think it is because vaporization always happens with lost of energy of the liquid.
- Sun Feb 04, 2018 2:22 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Test Number 1
- Replies: 9
- Views: 1033
Re: Test Number 1
you can figure it out it two ways (question:A balloon filled with gas is expanded to a larger volume and lower pressure while maintaining the same temperature. Answer yes or no if heat is being transferred in the process. ) 1:since it is a isothermal expansion, delta T=0, then delta U=0. there is no...
- Sun Feb 04, 2018 2:17 pm
- Forum: Calculating Work of Expansion
- Topic: Calculating Work of Expansion
- Replies: 4
- Views: 663
Re: Calculating Work of Expansion
Since Dr.Lavelle did mention it specifically, i think we could just use these equations. What matters is whether you understand the question and how to solve it, but not the mathematical calculation demonstration on equation
- Fri Jan 26, 2018 12:41 am
- Forum: Calculating Work of Expansion
- Topic: Irreversible Expansion
- Replies: 3
- Views: 539
Re: Irreversible Expansion
First, reversible process is one that can be reversed by an infinitely small change in infite-small change for example, 2 systems are both under 2 atm pressure, they could push/pull each other with a tiny small change in volume, it works the same for both directions however, if the 2 system are one ...
- Fri Jan 26, 2018 12:38 am
- Forum: Calculating Work of Expansion
- Topic: 8.17 Work done by a system
- Replies: 6
- Views: 668
Re: 8.17 Work done by a system
Work done by a system: the energy of system released to do work, which means the system loses ENG
Work done on the system: the energy done by the surroundings, like compressing the air, which means the internal energy of the system increases
Work done on the system: the energy done by the surroundings, like compressing the air, which means the internal energy of the system increases
- Thu Jan 25, 2018 11:38 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Homework 8.57
- Replies: 2
- Views: 397
Homework 8.57
Why on the solution manuals
the answer use the sum of enthalpy of reactant to minus the sum of enthalpy of products???
or do i misunderstand the meaning of ∆Hc is it meaning the enthalpy of formation ???
the answer use the sum of enthalpy of reactant to minus the sum of enthalpy of products???
or do i misunderstand the meaning of ∆Hc is it meaning the enthalpy of formation ???
- Fri Jan 19, 2018 4:04 am
- Forum: Calculating Work of Expansion
- Topic: 8.3 Homework
- Replies: 4
- Views: 590
Re: 8.3 Homework
the truth is totally opposite.
when work is done by the system, w is negative (expand
when work is done by the environment to the system, w is positive (compress
when work is done by the system, w is negative (expand
when work is done by the environment to the system, w is positive (compress
- Fri Jan 19, 2018 4:01 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Homework 8.15
- Replies: 3
- Views: 432
Re: Homework 8.15
when the system lost heat to its surrounding, q is negative
- Fri Jan 19, 2018 3:56 am
- Forum: Calculating Work of Expansion
- Topic: Homework 8.11
- Replies: 8
- Views: 810
Re: Homework 8.11
REPLY TO THE UPPER
Expand isothermally means that temperature stays the same, which means there is no heat transfer.All energy transfer comes form doing work. It applies to the isothermal expanding equation w=-nRT ln ( V2/V1)
Expand isothermally means that temperature stays the same, which means there is no heat transfer.All energy transfer comes form doing work. It applies to the isothermal expanding equation w=-nRT ln ( V2/V1)
- Mon Jan 15, 2018 9:33 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Bond Enthalpies
- Replies: 7
- Views: 1054
Re: Bond Enthalpies
NO HAS A DOUNVLE BOND
BUT NO2 HAS A resonnance structure, which means the strenth of the bond is between double bond and single bond
Therefore, NO has higher bond enthalpy
BUT NO2 HAS A resonnance structure, which means the strenth of the bond is between double bond and single bond
Therefore, NO has higher bond enthalpy
- Mon Jan 15, 2018 9:29 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: 8.1 part c [ENDORSED]
- Replies: 8
- Views: 1127
Re: 8.1 part c [ENDORSED]
Since the purpose of the device is measure the heat of the substance released by burining it. Therefore, there should be no heat transfer between the device and environment
- Mon Jan 15, 2018 9:27 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Closed Versus Isolated System
- Replies: 3
- Views: 408
Re: Closed Versus Isolated System
A isolated system is totally separate with the outside environment; however, a closed system could still exchange heat with the outside environment.
- Sat Dec 09, 2017 9:56 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Question in adding H20 in equilibrium reaction
- Replies: 2
- Views: 754
Question in adding H20 in equilibrium reaction
The photosynthesis reaction, 6 CO2(g) + 6 H2O(l) ⇌ C6H12O6(aq) + 6 O2(g), is endothermic. What effect will the following changes have on the equilibrium composition.
a) Water is added.
why the answer isn't no effect since water is not part of Equilibrium constand
a) Water is added.
why the answer isn't no effect since water is not part of Equilibrium constand
- Wed Dec 06, 2017 9:28 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Homework 11.89 [ENDORSED]
- Replies: 1
- Views: 254
Homework 11.89 [ENDORSED]
when calculating the equilibrium constant of the chart.
question 1: In solution manuals, why does it use kPa as unit but not atm??
question 2: Even if it use kPa, why it use the percentage value like 5/100 but not just 5 (kpa)
question 1: In solution manuals, why does it use kPa as unit but not atm??
question 2: Even if it use kPa, why it use the percentage value like 5/100 but not just 5 (kpa)
- Sun Dec 03, 2017 4:06 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Why is NH3 a base while NH4 an acid? H2S03? [ENDORSED]
- Replies: 2
- Views: 12656
Re: Why is NH3 a base while NH4 an acid? H2S03? [ENDORSED]
Because NH4 has a proton to donate
NH3 can accept a proton
Therefore, based on the Bronsted principle.
NH4 is Bronsted acid
NH3 is Bronsted base
NH3 can accept a proton
Therefore, based on the Bronsted principle.
NH4 is Bronsted acid
NH3 is Bronsted base
- Sun Dec 03, 2017 3:43 pm
- Forum: Ideal Gases
- Topic: Q and K [ENDORSED]
- Replies: 35
- Views: 3015
Re: Q and K [ENDORSED]
K is the equilibrium constants of the reaction, which is only changed with the temperature. However, Q is the reaction rate at any time of the reaction, which will be changed with add/remove of the substance,volume,and concentrations. In the other words, we say Q includes K; K is one value of Q in t...
- Tue Nov 28, 2017 2:10 am
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Homework Question 4.73 (b)
- Replies: 1
- Views: 327
Homework Question 4.73 (b)
usually, we said if the central atom of molecule has lone pairs, it is radical.
Why CH3 ; CH4; CH3 ; CH2; CH22 ; CH22 are all not radical??
Why CH3 ; CH4; CH3 ; CH2; CH22 ; CH22 are all not radical??
- Tue Nov 28, 2017 12:21 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Homework Question 4.25 (a)
- Replies: 1
- Views: 230
Homework Question 4.25 (a)
for the molecule CH2Cl2 I think there are 2 ways to draw its lewis structure. one is that we draw the two H atom in the opposite direction; so do the Cl atoms. second one is we draw the two H atom next to each other; so do the Cl atoms. i think for the first one, the molecule is non-polar and the se...
- Mon Nov 27, 2017 10:09 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: AX4E2 lone pairs
- Replies: 2
- Views: 1042
Re: AX4E2 lone pairs
The two lone pairs are farthest apart when they are on opposite sides of the central atom.
The AX4e2 adopt both equatorial positions and square planar arrangement.
The AX4e2 adopt both equatorial positions and square planar arrangement.
- Mon Nov 27, 2017 10:06 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Electron Arrangement and Molecular Shape
- Replies: 4
- Views: 520
Electron Arrangement and Molecular Shape
It is different to describe Electron Arrangement and Molecular Shape?
For example, what's the Electron Arrangement and Molecular Shape of SO3 ^-2?
what's the Electron Arrangement and Molecular Shape of NH3??
For example, what's the Electron Arrangement and Molecular Shape of SO3 ^-2?
what's the Electron Arrangement and Molecular Shape of NH3??
- Tue Nov 21, 2017 9:09 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Reaction progress [ENDORSED]
- Replies: 2
- Views: 562
Re: Reaction progress [ENDORSED]
Usually, the x-axis is time, and the y-axis is the concentration of reactants. It looks like the picture shown in the following links.
https://chem.libretexts.org/Core/Physic ... _Rate_Laws
https://chem.libretexts.org/Core/Physic ... _Rate_Laws
- Tue Nov 21, 2017 9:07 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Why do lone pairs take up more space than bonds?
- Replies: 5
- Views: 11706
Re: Why do lone pairs take up more space than bonds?
Because lone paris have the strongest repulsion force to each other.
- Tue Nov 21, 2017 9:06 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: What does it mean exactly that the reactions are at equilibrium?
- Replies: 3
- Views: 616
Re: What does it mean exactly that the reactions are at equilibrium?
When the reaction are at equilibrium, the reaction rate and the reverse reaction rate are equal( although the concentrations could be different)
In that case, the reaction rate will increasing gradually reaching the equilibrium point instead of being equilibrium immediately.
In that case, the reaction rate will increasing gradually reaching the equilibrium point instead of being equilibrium immediately.
- Tue Nov 21, 2017 8:57 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Order of Orbitals
- Replies: 10
- Views: 2552
Re: Order of Orbitals
Yes, it matters. You need to follow the Aufbau Principle, and write the orbitals from lowest energy to highest energy.
- Tue Nov 21, 2017 8:55 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3006126
Re: Post All Chemistry Jokes Here
In Arctic, a bear drop into the lake and looking for help:
"HELP, i'm dissolving"
Another brown bear get there and explains:
"dude, bears are insoluble"
....
"That's easy for you to say, you are not polar....."
"HELP, i'm dissolving"
Another brown bear get there and explains:
"dude, bears are insoluble"
....
"That's easy for you to say, you are not polar....."
- Tue Nov 21, 2017 8:51 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Difference Between Kp and Kc
- Replies: 4
- Views: 1266
Re: Difference Between Kp and Kc
Kc And Kp. K and K are the equilibrium constants of gaseous mixtures. However, the difference between the two constants is that Kc is defined by molar concentrations, whereas Kp is defined by the partial pressures of the gasses inside a closed system
- Tue Nov 21, 2017 8:49 am
- Forum: Properties of Light
- Topic: Amplitude properties
- Replies: 4
- Views: 905
Re: Amplitude properties
Amplitude is independent from frequency and wavelength.
Amplitude decides the brightness of light( the number of photons)
The higher the frequency is , the more energy light has.
Frequency and wavelength are reversely related.
Amplitude decides the brightness of light( the number of photons)
The higher the frequency is , the more energy light has.
Frequency and wavelength are reversely related.
- Tue Nov 21, 2017 8:45 am
- Forum: Limiting Reactant Calculations
- Topic: Reactant vs. Reagent [ENDORSED]
- Replies: 23
- Views: 34425
Re: Reactant vs. Reagent [ENDORSED]
A reagent is a substance or compound added to a system to cause a chemical reaction, or added to test if a reaction occurs. The terms reactant and reagent are often used interchangeably—however, a reactant is more specifically a substance consumed in the course of a chemical reaction.
- Tue Nov 21, 2017 8:41 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Temperature in Kp measurements
- Replies: 2
- Views: 801
Re: Temperature in Kp measurements
You need to distinguish between rate and equilibrium position. Temperature always increases the rate of reactions (because it increases the collision frequency and the average energy of the particles reacting.) But the effect of temp on the equilibrium depends on whether the reaction is exo or endot...
- Tue Nov 21, 2017 8:36 am
- Forum: Ideal Gases
- Topic: Chemical equilibrium [ENDORSED]
- Replies: 9
- Views: 1812
Re: Chemical equilibrium [ENDORSED]
Yes, it is possible! Adding more product and changing the surrounding temperature and pressure will influence the chemical equilibrium.
- Sun Nov 19, 2017 4:31 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Naming Coordination Compounds
- Replies: 4
- Views: 623
Re: Naming Coordination Compounds
Add -o to the end of the anion name : for example cyanide-->cyano
YES, ammonia and chlorine are both ligands in [Co(NH3)5Cl]Cl*2h20
YES, ammonia and chlorine are both ligands in [Co(NH3)5Cl]Cl*2h20
- Sun Nov 19, 2017 3:35 pm
- Forum: Naming
- Topic: Terminology
- Replies: 4
- Views: 402
Re: Terminology
In coordination chemistry, a ligand is an ion or molecule (functional group) that binds to a central metal atom to form a coordination complex. The bonding with the metal generally involves formal donation of one or more of the ligand's electron pairs.
- Sun Nov 12, 2017 8:37 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angles
- Replies: 4
- Views: 609
Re: Bond Angles
Yes. It is one of the important parts that are mentioned on the outline of chapter 4.
- Thu Nov 09, 2017 4:16 am
- Forum: Bond Lengths & Energies
- Topic: Homework Question 3.87 Strongest&Weakest CX bond [ENDORSED]
- Replies: 1
- Views: 766
Homework Question 3.87 Strongest&Weakest CX bond [ENDORSED]
3.87 Which do you predict to have the strongest CX bond, where X is a halogen: (a) CF4, (b) CCl4, or (c) CBr4? Explain.
if we use length strength, cf4 is the strongest.
if we use electronegativity to judge, cf4 is the weakest.
how should we solve the problem???
if we use length strength, cf4 is the strongest.
if we use electronegativity to judge, cf4 is the weakest.
how should we solve the problem???
- Thu Nov 09, 2017 3:29 am
- Forum: Ionic & Covalent Bonds
- Topic: How to define Ionic&Covalent Bonds? [ENDORSED]
- Replies: 1
- Views: 308
How to define Ionic&Covalent Bonds? [ENDORSED]
How to define the Ionic&Covalent Bonds if the electronegativity difference is between 1.5 to 2
- Thu Nov 09, 2017 3:18 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron config of elements in 5d and 6d
- Replies: 4
- Views: 1184
Re: Electron config of elements in 5d and 6d
You do not have to count the f-block square
for Osmium, it should be 5d6
for Osmium, it should be 5d6
- Thu Nov 09, 2017 3:08 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron config of elements in 5d and 6d
- Replies: 4
- Views: 1184