Search found 76 matches

by 204929947
Sat Mar 16, 2019 11:16 pm
Forum: Zero Order Reactions
Topic: Reaction Rate
Replies: 10
Views: 41

Re: Reaction Rate

when given a table, you can use any reaction and the values to kind K, right?
by 204929947
Sat Mar 16, 2019 11:15 pm
Forum: Zero Order Reactions
Topic: Zero Order Reactions
Replies: 7
Views: 43

Re: Zero Order Reactions

how do you know if it's zero order?
by 204929947
Sat Mar 16, 2019 11:13 pm
Forum: General Rate Laws
Topic: Unique Reaction Rates [ENDORSED]
Replies: 27
Views: 27503

Re: Unique Reaction Rates [ENDORSED]

what is the difference between the instantaneous rate and the unique rate law??
by 204929947
Sun Mar 10, 2019 2:51 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: HW Number 17 (6th ed.)
Replies: 2
Views: 30

Re: HW Number 17 (6th ed.)

how would i find the rate constant ????
by 204929947
Sun Mar 10, 2019 2:51 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Homework 6th edition, 15.17
Replies: 3
Views: 21

Re: Homework 6th edition, 15.17

how would i find the rate constant ????
by 204929947
Sat Mar 09, 2019 10:02 pm
Forum: First Order Reactions
Topic: self test 15.8A (6th edition)
Replies: 1
Views: 10

self test 15.8A (6th edition)

Can someone help me figure this out: In 1972, grain treated with methyl mercury was released for human consumption in Iraq, resulting in 459 deaths. The half-life of methyl mercury in body tissues is 70. d. How many days are required for the amount of methyl mercury to drop to 10.% of the original v...
by 204929947
Sat Mar 09, 2019 7:41 pm
Forum: General Rate Laws
Topic: rate law for first order reaction
Replies: 1
Views: 1

Re: rate law for first order reaction

so my question here is why does the book not have the k in front of [A](not) and Dr.Lavelle did put the K in front. Can someone please help.
by 204929947
Sat Mar 09, 2019 7:40 pm
Forum: General Rate Laws
Topic: rate law for first order reaction
Replies: 1
Views: 1

rate law for first order reaction

During lecture, Dr.Lavelle said that the rate law was
IMG_7808.jpg
by 204929947
Fri Mar 08, 2019 4:33 pm
Forum: General Rate Laws
Topic: 15.1
Replies: 3
Views: 26

Re: 15.1

just look at the coefficient and the way that the question is being asked.
by 204929947
Sun Mar 03, 2019 12:03 pm
Forum: General Rate Laws
Topic: Overall sum
Replies: 7
Views: 38

Re: Overall sum

this would be whatever we get for m and n added together. Like the last example we saw during class on Friday.
by 204929947
Sun Mar 03, 2019 12:00 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Test 2
Replies: 7
Views: 77

Test 2

Okay, so for Test 2, it had us put the redox molecules from increasing order, how would we do that?
by 204929947
Wed Feb 27, 2019 6:13 pm
Forum: Balancing Redox Reactions
Topic: 14.13 6th edition [ENDORSED]
Replies: 2
Views: 39

14.13 6th edition [ENDORSED]

hello, i was wondering, when you are doing the cell diagram, when do you know that you are supposed to add Pt on both sides????
by 204929947
Tue Feb 26, 2019 10:25 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.116th edition part e
Replies: 1
Views: 9

14.116th edition part e

So for all of the past reactions, i have been putting the reactions on one side and the products on the other, when im done with the half reactions. So my question here is why does the answer in part e on the back of the textbook flip the answer and put Sn2+ on the reactant side and Sn4+ on the prod...
by 204929947
Tue Feb 26, 2019 10:20 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagram
Replies: 3
Views: 32

Re: Cell Diagram

because you use h20 to balance out the oxygens when the half reaction is not balanced
by 204929947
Tue Feb 26, 2019 9:37 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6L.5 (d) half reactions
Replies: 3
Views: 36

Re: 6L.5 (d) half reactions

how do you tell the difference between a cathode and an anode?????
by 204929947
Tue Feb 26, 2019 9:11 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Moles in Galvanic Cell
Replies: 2
Views: 208

Re: Moles in Galvanic Cell

Im still confused on how to find out the moles. Do you set up the equation and then figure out how many electrons are used? I'm confused while doing the HW question 14.9 6th Edition
by 204929947
Fri Feb 22, 2019 10:13 pm
Forum: Balancing Redox Reactions
Topic: difference between oxidation and reduction
Replies: 8
Views: 54

difference between oxidation and reduction

can someone explain what the difference here is with an example, like if it goes from a +2 to a +4 what is it considered? oxidation or reduction???? I always get confused on how to know if its oxidation vs reduction.
by 204929947
Fri Feb 22, 2019 10:08 pm
Forum: Balancing Redox Reactions
Topic: Homework 14.5 part d
Replies: 4
Views: 34

Re: Homework 14.5 part d

Also, in part b, how come when they balance the equation out, they get rid of Br2 and only write 6OH- --> 5Br-(aq)+BrO3-(aq)+3H2O(l) ???
how did they cancel out Br2??
by 204929947
Fri Feb 22, 2019 3:35 pm
Forum: Balancing Redox Reactions
Topic: Test 2 Material
Replies: 11
Views: 96

Re: Test 2 Material

I'm also curious with this, what should I study?
by 204929947
Fri Feb 22, 2019 3:34 pm
Forum: Balancing Redox Reactions
Topic: Number of electrons
Replies: 5
Views: 44

Re: Number of electrons

In adittion, how would you find out the oxidation number of an element??
by 204929947
Mon Feb 18, 2019 9:15 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Isolated system
Replies: 10
Views: 84

Re: Isolated system

An isolated system means that no matter or heat can go into the system.
by 204929947
Mon Feb 18, 2019 9:15 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Midterm Grades
Replies: 35
Views: 327

Re: Midterm Grades

does anyone know when Test 3 is???
by 204929947
Mon Feb 18, 2019 9:14 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Final exam
Replies: 8
Views: 63

Final exam

Does someone know when our final exam is??
by 204929947
Sun Feb 10, 2019 9:11 pm
Forum: Phase Changes & Related Calculations
Topic: Celsius and Kelvin
Replies: 6
Views: 44

Re: Celsius and Kelvin

I have the same question.. sometimes they use C and sometimes they use K.. can someone clarify this for me please.
by 204929947
Sun Feb 10, 2019 12:54 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: midterm
Replies: 3
Views: 54

midterm

Does anybody know if there is a practice midterm that Dr.Lavelle or any of the TAs/UAs provided?
by 204929947
Sun Feb 10, 2019 12:52 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Midterm [ENDORSED]
Replies: 48
Views: 638

Re: Midterm [ENDORSED]

From past experience, his test tend to be conceptual. He wants you to really understand the concepts and know how to apply them. Also be able to denote when and how to use the formulas that he gives in class. The homework should be very similar to his test.
by 204929947
Sat Feb 09, 2019 7:21 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: homework 6th edition 12.31
Replies: 1
Views: 27

homework 6th edition 12.31

A student added solid Na2O to a 200.0-mL volumetric flask, which was then filled with water, resulting in 200.0 mL of NaOH solution. 5.00 mL of the solution was then transferred to another volumetric flask and diluted to 500.0 mL. The pH of the diluted solution is 13.25. What is the concentration of...
by 204929947
Fri Feb 08, 2019 10:00 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Hmwrk 11.45 6th edition
Replies: 3
Views: 106

Re: Hmwrk 11.45 6th edition

im not sure where you got 1.2*10^-7 if in the table it says the equilibrium constant is 1.0*10^-5
by 204929947
Fri Feb 08, 2019 8:52 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 11.39 6th edition
Replies: 2
Views: 28

11.39 6th edition

Hey guys, I don't quite understand how to calculate K. It says to use Table 11.2 but it doesn't show the full equation.. can someone help me please. Here is the question: Use the information in Table 11.2 to determine the value of K at 300 K for the reaction 2 BrCl(g) + H2(g) --> Br2(g) + 2 HCl(g).
by 204929947
Fri Feb 08, 2019 8:02 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 11.37 6th edition
Replies: 3
Views: 39

Re: 11.37 6th edition

I understand part C but can someone please explain part A and B
by 204929947
Tue Jan 29, 2019 5:29 pm
Forum: Calculating Work of Expansion
Topic: 4A.3 7th Ed
Replies: 6
Views: 53

Re: 4A.3 7th Ed

why do we need to put -(pi)(d) (r^2)???? where does this formula come from????
by 204929947
Sun Jan 27, 2019 8:24 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: ICE Box Ratios
Replies: 8
Views: 71

Re: ICE Box Ratios

-x will always be on the reactant side, someone correct me if im wrong (:
by 204929947
Sun Jan 27, 2019 8:20 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Autoprotolysis
Replies: 4
Views: 90

Re: Autoprotolysis

can someone explain this to me and when would we use it, thanks.
by 204929947
Sun Jan 27, 2019 8:20 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Ph and Pka
Replies: 5
Views: 44

Ph and Pka

How do you go from PH to Pka and vice versa?
by 204929947
Tue Jan 22, 2019 5:45 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 6th edition 12.29
Replies: 1
Views: 32

6th edition 12.29

I am confused on 12.29d, e, and f... i totally forgot what to do when dilution and when it dissolves. Can someone explain to me please. The question states to calculate PH and POH d) 2.0 mL of 0.175 M KOH(aq) after dilution to .5000L e) 13.6 mg of NaOH dissolved in 0.350L of solution f) 75.0 mL of 3...
by 204929947
Fri Jan 18, 2019 8:05 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Ka vs. Kb
Replies: 12
Views: 108

Re: Ka vs. Kb

PKw= POH+PH
PKa+PKb=14
PKa refers to acidity acid and PKb to weak basicity base
by 204929947
Fri Jan 18, 2019 8:00 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Knowing Acids or Bases
Replies: 3
Views: 43

Re: Knowing Acids or Bases

So as I see here, maybe you can remember that the bases usually contain OH
by 204929947
Fri Jan 18, 2019 7:54 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Temperature Affecting equilibrium constant
Replies: 2
Views: 33

Re: Temperature Affecting equilibrium constant

Did Professor Lavelle ever teach us how to determine the equilibrium if the temperature changes? Or would we just ignore the temperature and when he asks us about this, we would just answer it saying temperature affects equilibrium? I know that: When the reaction is endothermic, while forming produc...
by 204929947
Fri Jan 18, 2019 7:50 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Weak Acid & Salt
Replies: 4
Views: 41

Re: Weak Acid & Salt

The Potassium, K, cancels on both sides which is why we don't write it on the equation. We only write NO2-
by 204929947
Fri Jan 18, 2019 7:48 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Buffers - weak acid
Replies: 4
Views: 35

Re: Buffers - weak acid

can someone explain what a buffer is? I did not really understand this, thankyou.
by 204929947
Sun Jan 13, 2019 9:27 pm
Forum: Ideal Gases
Topic: When to Use PV=nRT
Replies: 8
Views: 92

Re: When to Use PV=nRT

what does PV=nRT stand for???
by 204929947
Sun Jan 13, 2019 9:24 pm
Forum: Ideal Gases
Topic: K value
Replies: 8
Views: 100

Re: K value

so when k=1, does that mean that there are the same amount of reactants and products????
by 204929947
Sun Jan 13, 2019 8:10 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Calculating Q
Replies: 7
Views: 36

Re: Calculating Q

when calculating either K or Q, you always have to put [products]/[reactants]
by 204929947
Sun Jan 13, 2019 7:20 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kp Units
Replies: 6
Views: 50

Re: Kp Units

As mentioned by Lavelle, units do not matter because they will cancel out.
by 204929947
Mon Jun 11, 2018 1:37 am
Forum: Determining Molecular Shape (VSEPR)
Topic: T-Shape
Replies: 6
Views: 173

T-Shape

I looked for the bond angles of the T-Shape but online some websites say slightly less than 90 degrees but others say 90 degrees and 120 degrees... someone help please
by 204929947
Sun Jun 10, 2018 8:40 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Helpful Chart
Replies: 18
Views: 377

Re: Helpful Chart

We made a similar chart in discussion too. I want to point out that I believe our TA mentioned something about the angles being less than 109.5 in some cases, I'm not exactly sure why or in what instances, but I think he mentioned lone pairs. I also think Lavelle said that we don't have to know the...
by 204929947
Sun Jun 10, 2018 3:36 pm
Forum: Hybridization
Topic: basics of hybridization
Replies: 18
Views: 459

Re: basics of hybridization

Assuming you are referring to hybridization in relation to chemical bonds, the following is a link to the first of a series of chemistry videos on hybridization and hybrid orbitals on Khan Academy: https://www.khanacademy.org/science/chemistry/chemical-bonds/copy-of-covalent-bonds/v/sp3-hybrid-orbi...
by 204929947
Sun Jun 10, 2018 3:36 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: polar/nonpolar
Replies: 3
Views: 99

polar/nonpolar

I'm still a little confused on when a molecule is polar or not. So if the forces cancel out it is polar? The forces have to be facing each other right? (--><-- like that)
by 204929947
Sun Jun 10, 2018 3:32 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent/angular [ENDORSED]
Replies: 5
Views: 97

Bent/angular [ENDORSED]

I was watching a video on shapes and the guy kept saying angular.. is this the same thing as bent?
by 204929947
Wed Jun 06, 2018 10:39 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: molecular shape-seesaw
Replies: 2
Views: 84

molecular shape-seesaw

How do you know when it is a seesaw shape? I get it confused with the tetrahedral shape :(
by 204929947
Sun Jun 03, 2018 10:19 pm
Forum: Ionic & Covalent Bonds
Topic: lone pairs
Replies: 2
Views: 114

lone pairs

So the more lone pairs you have, the more tight the molecule it is?
by 204929947
Sun Jun 03, 2018 10:15 pm
Forum: Sigma & Pi Bonds
Topic: delocalized and localized pi bond
Replies: 3
Views: 221

delocalized and localized pi bond

Whats the difference between delocalized and localized pi bonds?
by 204929947
Sun Jun 03, 2018 10:08 pm
Forum: Dipole Moments
Topic: dipole moments
Replies: 9
Views: 250

dipole moments

I remember Dr.Lavelle discussing dipole moments and how the vectors of the molecules have to cancel in order to be polar. This week in discussion, my TA said something about the length in a vector, how would you know the length?
by 204929947
Sun May 27, 2018 9:29 pm
Forum: Resonance Structures
Topic: Radicals
Replies: 3
Views: 128

Radicals

How do you know if a molecule is a radical? And what is special about these?
by 204929947
Sun May 27, 2018 9:26 pm
Forum: Lewis Structures
Topic: bonds
Replies: 2
Views: 85

bonds

So as Dr. Lavelle said, shorter bonds are stronger and longer bonds are weaker, why is this? I get mixed up because he also talked about the angles in the bonds (shape of a molecule- ex: tetrahedral) why do they want to be as far away as possible??
by 204929947
Sun May 27, 2018 9:15 pm
Forum: Lewis Structures
Topic: Question 3.41
Replies: 1
Views: 46

Question 3.41

For this question I had trouble with part c. I have all the valence electrons down but I'm had trouble figuring out how to bond them. Where and how do I know what molecule goes with which one? Can someone give me hints or tips please, thanks.
by 204929947
Sun May 20, 2018 11:57 pm
Forum: Ionic & Covalent Bonds
Topic: condensed phase
Replies: 2
Views: 64

condensed phase

what does condensed phase refer to? I was unsure when Dr.Lavelle mentioned it in class???
by 204929947
Sun May 20, 2018 11:51 pm
Forum: Ionic & Covalent Bonds
Topic: Formal Charge
Replies: 3
Views: 74

Formal Charge

so I'm watching this tutorial on how to find the formal charge of a molecule and in the video it gives the equation as
formal charge = (# valence electrons in free atom) - (# valence electrons in bonded atom) is this right ??? or do we use the original equation given to us in lecture???
by 204929947
Sun May 20, 2018 9:49 pm
Forum: Ionic & Covalent Bonds
Topic: Polarization
Replies: 7
Views: 195

Polarization

So, Dr.Lavelle said that an element is highly polarizable if the electrons are highly distorted, does this make the ionic bond more or less with a covalent character? I remember him mentioning something about ionic bonds with covalent character... can someone explain how ionic and covalent bonds are...
by 204929947
Sun May 20, 2018 7:35 pm
Forum: Ionic & Covalent Bonds
Topic: delta positive and delta negative
Replies: 2
Views: 57

delta positive and delta negative

How do you know when an element is delta positive or delta negative??
by 204929947
Sun May 13, 2018 10:43 pm
Forum: Formal Charge and Oxidation Numbers
Topic: oxidation
Replies: 7
Views: 218

oxidation

Hello, I was just wondering why is it that some elements have oxidation states - or +? Also, why is it that both - and + can exist for the same element?
by 204929947
Sun May 13, 2018 9:39 pm
Forum: Quantum Numbers and The H-Atom
Topic: xyz
Replies: 2
Views: 144

xyz

I never really understood what the xyz was on a shell?? Can someone clarify what this was referring to?
by 204929947
Sun May 13, 2018 9:22 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: cations
Replies: 5
Views: 135

cations

So I'm still struggling with cations and anions.. so when its Na+ its a cation but can someone explain to me the difference in size? I remember something about the more protons, the smaller and the less protons, the bigger.. why is that???
by 204929947
Sun May 13, 2018 9:21 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: cations vs anions
Replies: 4
Views: 142

cations vs anions

So I'm still struggling with cations and anions.. so when its Na+ its a cation but can someone explain to me the difference in size? I remember something about the more protons, the smaller and the less protons, the bigger.. why is that???
by 204929947
Tue May 08, 2018 12:37 am
Forum: Einstein Equation
Topic: Question on Midterm
Replies: 7
Views: 263

Question on Midterm

For the midterm, I remember Dr.Lavelle said something on Friday about using all the numbers for Plank's constant (or any constant)... for example, instead of using 6.626, we would use all the numbers, which are 6.62607004... would we have to use all the numbers instead of just the first three.. beca...
by 204929947
Sat May 05, 2018 1:05 am
Forum: Ionic & Covalent Bonds
Topic: cation vs anion
Replies: 14
Views: 319

cation vs anion

can someone explain the difference between cation and anion? How can I memorize it?
by 204929947
Sat May 05, 2018 12:55 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: energy with s,p,d,f
Replies: 3
Views: 87

energy with s,p,d,f

Can someone help me memorize the way in which the orbitals goes from largest energy to lowest energy?
For example, 4s^1,4s^2 ... like how do i know when the orbital is full? also how do i read the periodic table.. like how would i know whats next when my orbitals are full and i have more electrons?
by 204929947
Sun Apr 29, 2018 10:45 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Quiz #2 Question #2 B
Replies: 5
Views: 210

Re: Quiz #2 Question #2 B

I believe that moving from n=5 to n=3 is higher frequency because you are releasing energy
by 204929947
Sun Apr 29, 2018 10:42 pm
Forum: Trends in The Periodic Table
Topic: s, p, d, f
Replies: 16
Views: 300

s, p, d, f

What is the different between the orbitals?
by 204929947
Sun Apr 29, 2018 10:32 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: orbitals
Replies: 3
Views: 89

orbitals

From the periodic table, can someone please explain why we can use [Ar] as Br and how do you do write it out, please and thanks
by 204929947
Wed Apr 25, 2018 9:39 pm
Forum: Properties of Light
Topic: Equations for light [ENDORSED]
Replies: 4
Views: 113

Equations for light [ENDORSED]

c=(Lambda/wavelength)(velocity/frequency)
and
E=hv

I think that the basic equations that you need to know for test two are these, and from there you can play around with them based on what the question is asking (:
by 204929947
Tue Apr 10, 2018 7:16 pm
Forum: Molarity, Solutions, Dilutions
Topic: Review Question [ENDORSED]
Replies: 3
Views: 186

Review Question [ENDORSED]

I am not sure how to solve the question from the review test on our first quiz, can someone please help me Question: Hard water is water that has high mineral content (mainly Calcium and Magnesium). A concentration above 5.30 x 10−3 M is considered to be very hard water. Assuming that there are no m...
by 204929947
Tue Apr 10, 2018 3:21 pm
Forum: Molarity, Solutions, Dilutions
Topic: Mixtures and Solutions
Replies: 2
Views: 62

Mixtures and Solutions

I am a bit confused on how to use the equations provided by section G.
Can someone please explain what "c=n/V" and "n=m/M"?
Also, 1 M = 1 mol*L^-1, im a bit confused on what this means and how to use it in the formulas above.
by 204929947
Tue Apr 10, 2018 3:17 pm
Forum: Balancing Chemical Reactions
Topic: H.5.b [ENDORSED]
Replies: 7
Views: 195

Re: H.5.b [ENDORSED]

Yes, you would have to multiply the subscript by the parenthesis. The atoms in the parenthesis show you that you would only have to multiply the subscript by what is inside the parenthesis. It's like in math when you distribute a coefficient just that here, the coefficient is at the end of the paren...
by 204929947
Tue Apr 10, 2018 3:06 pm
Forum: Balancing Chemical Reactions
Topic: Fractions in chemical equations [ENDORSED]
Replies: 5
Views: 177

Re: Fractions in chemical equations [ENDORSED]

It would not make sense if you put a fraction as a coefficient
1) there can't be 4/5 of carbon, atoms can not be broken down
2) coefficients have to be whole numbers
In addition, if you were to think about it, using fractions will take up more time and the process will be longer.
by 204929947
Tue Apr 10, 2018 3:03 pm
Forum: Molarity, Solutions, Dilutions
Topic: Question on Self Test G.3A
Replies: 1
Views: 63

Question on Self Test G.3A

In the book, the questions asks "What volume of 1.25 x 10^-3 M C6H12O6 (aq) contains 1.44 umol (micro) of glucose molecules?" I am unsure how to change umol into mmmol. Can someone please explain these steps?

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