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July 23, 2014

Search: lewis structure

Number of results: 2,406

CHEMISTRY
Given assumed valencies: H=1, N=3, & C=4 i am now required to draw the structural formulae of HYDROGEN CYANIDE and CYANOGEN. H:C:::N is the Lewis electron dot structure. If you want to use "sticks" as a bond instead of two electrons, one stick stands for two electrons. H-...
February 7, 2007 by MARK

chemistry, polar or nonpolar
Why is NO3 nonpolar but CIF3 is polar? I looked at the lewis structures, they look similar, but why is one opposite. also, when something is polar or non polar, my teacher said I should see which atom is more electronegativity is higher and draw arrows towards it on a lewis ...
January 25, 2009 by Anonymous

Chemistry
When I listen to my teacher explain things i get headaches and I cant concentrate, I just put dots everywhere on the lewis Dot Structure because its funny!!
November 6, 2007 by Chelsea

chemistry
draw a lewis structure for a resonance form of ClO2- showing the lowest possible formal charges and give the oxidation numbers of the atoms
September 20, 2010 by Missy

Chemistry
is the lewis dot structure and a electron dot diagram the same thing ?
December 2, 2010 by Anonymous

Chemistry
What is the Lewis structure formula, electron pair geometry and the molecular geometry for SO4^2-
August 7, 2013 by rose

Chemistry
Draw the best Lewis structure for NCCH2C(O)CH2CHO, a neutral molecule. Show all atoms, bonds, lone pairs, and formal charges.
September 11, 2009 by Cathy

Chemistry
How do you know if you use a single, a double, or a triple bond when drawing the Lewis structure of a compound? How do you know if a bond is covalent or ionic?
October 19, 2009 by Katie Y.

Chemistry
Consider the Lewis structure for the major resonance form of PCS–. (Note that carbon is the central atom.) The structure shows: a. A phosphorus-carbon triple bond and a carbon-sulfur single bond. b. A phosphorus-carbon double bond and a carbon-sulfur double bond c. A ...
April 26, 2010 by Mary

chemistry
(a) Construct a Lewis structure for O2 in which each atom achieves an octet of electrons. (Assign lone pairs where appropriate.) i am using marvin sketch and dont know what i need to show
December 2, 2012 by Samantha

chemestry
draw the Lewis structure for the following compounds,and predict the molecular shapes. a) water,H2O b)Oxygen gas,O2 c)Ammonia, NH3 d)Ammonium ion,NH4
June 3, 2013 by irfan

chemistry
How would SiO4 Lewis structure look like? Each oxygen has 1 unfilled electron, so would there be 2 double bonds? Thanks in advance.
May 5, 2009 by sh

louisiana purcahase
1.what was the Pickney treaty? 2.why did president jefferson want to buy new orleans from france? 3.why was napoleon willing to sell the entire louisiana purchase?(2reasons) 4.how much did the U.Spay for the Louisiana territory? 5.how much larger did the U.s get from this ...
November 9, 2009 by sakura

Chemistry (lewis structure/bond)
Example: Sulfur Trioxide Chemical formula: SO3 Valence e-: ? Needed e-: ? Difference/Bond: ?? Please help me!
April 15, 2011 by Toni Jones

Chemistry
Write the Lewis structure for each ion Al3+ Mg3+ Se2- N3- My question is why does Se2- get a bracket and 8 dots. And the same for N3-. I hope I'm making sense.
September 11, 2011 by Monique

Chemistry
I need help with the Lewis Dot Structure. I'm so lost. The problems I have and need help with are 1) H2NCH3 2) C3H6 3)NO2-ion 4) H3CSCH2F 5) NCl3 6) H2NCOOH 7)C3H7OH
May 23, 2012 by Brittany

Organic Chem
Classify each as a lewis acid or lewis base... A)H20 B)O2- C)Cu2+ D)SO3 E)AlCl3
October 15, 2010 by Adam

chemistry
the reaction between CV+ and -OH, is CV+ lewis acid and OH lewis base
May 11, 2010 by bme1

chemistry
the reaction between CV+ and -OH, is CV+ lewis acid and OH lewis base
May 12, 2010 by bme1

chemistry
Which of the following is considered a Lewis acid or a Lewis base. I- H2O BCl3 NH3 OH- H+ CO2 SO2
July 16, 2010 by student

chemistry
Draw a lewis structure for BrO4- in which all atoms have the lowest formal changes. Indicate the values of nonzero formal charges and include lonepair electrons.
January 19, 2009 by Jack

Chemistry
Draw Lewis Structure for BrO3^- The textbook answer involves a central Br atom with one lone electron pair and five shared pairs (two double bonds and one single bonds). This gives Br twelve electrons rather than the typical eight. I understand that some atoms like Br have ...
August 6, 2012 by Parker

ap chem
consider the molecules PF3 and PF5. b]is the PF3 molecule polar or is it nonpolar. explain C] on the basis of bonding principles, predict whether each of the following compounds exists. In each case explain your prediction. (i) NF5 (ii) AsF5 2. explain why the H-N-H bond angle...
January 23, 2007 by Emily

chemistry
I have the lewis structure for ICL3 and SF4, it is asking for the general formula for ICL3? Is this the empirical formula if so how would I figure out how to do that
November 14, 2010 by Sarah

Chem?
Which of these elements can't have an expanded octet in a Lewis structure? P,O,Br,N,S,C,B,Si I think its O,C,B,N. Are elements that dont have a d oribial arent supposed to be included?
November 14, 2007 by Anonymous

Organic cChemistry
For each pair of molecules or ions, select the stronger base and write its lewis structure a) CH3S- or CH3O- b) CH3NH- or CH3O- c) CH3COO- or OH- d) CH3CH2O- or H- e) NH3 or OH- I would really appreciate the help!
October 10, 2013 by Kourtnei

Chemistry
Draw the lewis dot structure showing what happens during the reaction Lithium and Chlorine produce Lithium Chloride. how do you draw this, please help .
February 13, 2011 by Tina

AP Chem
A valid Lewis structure of __________ cannot be drawn without violating the octet rule. Answer: BeH2 Why would BeH2 break the octet?
January 13, 2013 by Anon

Chemistry
How would I go about creating a Lewis Dot structure for the Calcium Carbonate and Magnesium Hydroxide? I know how to do it for any compound with two elements such as SF5, but I don't know how to approach it when there's a polyatomic ion involved and there are three elements.
November 6, 2012 by Ezra

chemistry,
,I NEED TO DRAW A LEWIS STRUCTURE for C2n2,cyanogen,and to state the noble gas,i know the answer is neon,but i have far to many electrons and am getting the gas argon,please help :N:::C:C:::N: please where do u think i am going wrong I don't know. You didn't show any work. C ...
March 3, 2007 by jane

chemistry
In 1999, chemists working for the Air Force Research Laboratory reported that they had produced a compound containing an unusual ion with the formula N5 +. This ion had not been expected to exist, and its instability makes it both diffi cult and dangerous to prepare. Consider ...
April 20, 2012 by aydin

chem
A molecular compound is composed of 58.8% Xe, 7.2% O, and 34.0% F, by mass. If the molecular weight is 223 g/mol, what is the molecular formula? Draw the correct Lewis structure. Predict the molecular geometry using the VSEPR model.
December 13, 2010 by chemistry

Chemistry
# Electron Pairs # Lone Pairs Electronic Geometry Molecular Geometry Lewis Structure Sketch of Shape I need to do the above things for SBr6 and BrCl5. If anybody can help that would be great!
April 26, 2011 by Jake

AP Chemistry
The Lewis structure of shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS- so there are two electrons not bonded- so one pair?
January 13, 2013 by koolchem

AP Chemistry
The Lewis structure of shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS- so there are two electrons not bonded- so one pair?
January 13, 2013 by koolchem

AP Chemistry
The Lewis structure of shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS- so there are two electrons not bonded- so one pair?
January 13, 2013 by koolchem

10th grade
I really need help! I need to know how a Table with polyatomic listed looks like. And Rules for naming Covalent Compounds (mono, di, tri,..) and How to find Lewis structure using the periodic table
November 16, 2008 by Melissa

AP Chemistry
The Lewis structure of PF3 shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS- so there are two electrons not bonded- so one pair?
January 13, 2013 by Anon

chemistry
the thing that is troubling me is that NO2 is not (NO2)- does that change it from being considered a lewis base to a lewis acid?
February 12, 2009 by Anonymous

chm
The Lewis dot structure of ammonia, NH3, reveals that it has one lone pair of electrons and three bonds (each to a hydrogen) around the central nitrogen atom. According to VSEPR theory, what molecular shape will it have? i thought it was tetrahedral but its wrong. what and why...
February 18, 2013 by luck

Chemistry
Which of the following is a Lewis acid? (For polyatomic species, consider the Lewis acid behaviour of the central atom). a. ) NH3 b. ) F- c. ) H2O d. ) PF5 e. ) BF3
May 30, 2009 by Sean

Science URGENT!!!
Mulitple choice: why is it uncommon to draw lewis diagrams for ionic compounds? A.) Lewis diagrams can only illustrate covalent bonding B.) ionic compounds cannot be represented by Lewis diagrams C.) ionic compounds involve electron transfer not electron sharing d.) formulas ...
March 20, 2014 by Anonymous

chemistry
how do u draw the lewis structure for something like CO -2 over 3. do u add 2 electrons on to the oxygen when yur finding the number of valence electrons cuz thats wat i thought u did but then i got all those questions wrong so wat do u do
October 4, 2007 by michelle

chemistry
what is the molecular geometry of trans-difluroethylene: trans-C2H2F2? I know how to draw the lewis structure but I'm not sure how to find the molecular geometry. I think it's a tetrahedral
May 24, 2008 by Cabel

Chemistry
Choose the true statements regarding the charge-minimized Lewis structure(s) of the BrO2- ion. (selet all that apply) a. There is only one charge-minimized structure for this ion. b. There are two charge-minimized resonance structures for this ion. c. The formal charge on the...
October 5, 2008 by Lindsay

Gen chem 2
D-Glucose, C6H12O6, is an aldohexose sugar which occurs commonly in nature. In a text or reference book look up "-D-(+)-Glucose and write its correct, complete Lewis structure. Then “parcel” e’s to determine the correct (O) no. for each C atom in this molecule. I am so confused.
July 7, 2008 by Elisa

physics
Carl Lewis set a world record for the 100.0-m run with a time of 9.86 s. If after reaching the finish line, Mr. Lewis walked directly back to his starting point in 90.9 s, what is the magnitude of his average velocity for the 200.0m?
February 22, 2013 by Pearl

chemistry
how does a hydrate form? Generally water adds to a metal ion to the d,s, and or p orbitals in which the metal acts as a Lewis acid. I can reword that somewhat if you haven't studied about Lewis acids.
January 7, 2007 by daniela

chemistry
i do not understand how to do these and i have a question on my test tomorrow on this stuff can someone explain to me how to do this? for each of the following molecules draw the lewis structure, determine the shape, determine the polarity, and determine the kinds of ...
May 18, 2011 by brittney

Chemistry
Which one of the following pairs of reactants would react together in a Lewis Acid/Lewis Base reaction? a. KOH and HNO2 b. NaOH and HCl c. CH3COOH and HF d. Ag+ and NH3 e. HClO and NH3
February 27, 2011 by Brian

chemistry
Which of the following is a Bronsted-Lowry base but not a Lewis base? a) H2O c) CN– e) all choices are both a B/L and Lewis base. b) CO3–2 d) NH3 need help deciding
March 17, 2012 by bob

chemistry
Consider the compound NOCl. In the lewis dot structure, which element should be the central atom? Choose from following. N,O,Cl,both N or O could be in middle, both N or Cl could be in the middle,both O or Cl could be in middle,or all the elements could be in middle.
June 1, 2013 by Anonyms

Chemistry
In the Lewis structure for SF4, there are: a. 12 electrons surrounding the S. b. 10 electrons surrounding the S c. a total of 42 valence electrons. d. Both a and c are correct. e. None of the above are correct
September 10, 2010 by catherine

Chemistry
When it says, " Draw a Lewis diagram for each of the following. " a)One atom of each of the elements in the second period. Is it asking me to draw a Lewis diagram for Lithium and Beryllium?
July 8, 2010 by Derrick

Chemistry
I have to write the exact lewis electron dot structure for para xylene C8H10. I tried writing it out but it doesnt work out proerly. C is supposed to have 31 electrons and H is supposed to have 10 totaling 42. i was doing research and it says that it is aromatic and i tried to...
November 29, 2009 by Sam

SCIENCE
1. Multiple choice: why is it uncommon to draw lewis diagrams for ionic compounds? A.) Lewis diagrams can only illustrate covalent bonding B.) ionic compounds cannot be represented by Lewis diagrams C.) ionic compounds involve electron transfer not electron sharing d.) ...
March 20, 2014 by Anonymous

Chemistry
Hi. Is PO4(3-) polar or non-polar? Why or why not? Thanks! Look up the electronegativity of P and O. I think I remember that O is about 3.5 and P is about 2.1; therefore, each P-O bond is somewhat polar. Thus, the ion will be polar unless the Lewis structure (electron dot ...
November 23, 2006 by Sally

science
how much did the first microscope magnify I think it was 40x lewis is your last name smith lewis is your last name smith
September 24, 2006 by lewis

chemistry
Which of the following statements is true regarding the Lewis structure for methylamine, CH3NH2? a) There will be an unshared pair of electrons on the nitrogen atom. b) There will be three covalent bonds to the carbon. c) Nitrogen will form a double bond with the adjacent ...
September 9, 2010 by Sawyer

chemistry
Define a lewis base. Can OH- function as a Lewis base?
March 17, 2008 by Anonymous

chemistry
what transition metal complex is responsible for transporting oxygen in our blood? Also, what is its structure? The transition metal (there are several transition series---I assume you are referring to the 3d transition metals) is iron. As to its sturcure, the iron itself has ...
April 17, 2007 by Bob

Chem
Which molecule is not polar (possesses no net dipole)? Option 1. acetone [Marvin structure] Option 2. cis-dichloroethene [Marvin structure] Option 3. methylbromide [Marvin structure] Option 4. trans-dichloroethene [Marvin structure] Option 5. dibromomethane [Marvin structure]
September 7, 2009 by Mike

math
beth and lewis buy the same amount of fish pellets if beth feeds her fish 14 pellets each day a conntainer of pellets will last 20 days if lewis feeds his fish 8 pellets each days how many days will the container of pellets last lewis
November 8, 2012 by Anonymous

Chemistry
How do you find the number of valence electrons in a molecule? Do I need to use the Lewis structure diagram to find out? Please help! I need to the total number of valence electrons for SiH4, H2SO4, CCl4, BF3 and I don't know how!
February 10, 2010 by Anonymous

Chemistry
Use Lewis Symbols to show the reaction of atoms to form arsine, AsH3. Indicate bonding pairs in the Lewis formula of AsH3 are bonding and which are lone pairs.
November 30, 2007 by Lauren

chemistry
Some properties of the two compounds are listed below: Melting point- Compound X= -114*C Compound Y= -138*C Boiling Point- Compound X= 78*C Compound Y= -22*C Net Dipole?- Compound X= Yes Compound Y= Yes Functional group: Compound X Alcohol Compound Y= Ether i.) Draw plausible ...
February 10, 2010 by LeePyeonggang

chemistry
I have to draw the QMM of CL2C2. For the Lewis structure i think that the two C ayoms form a triple bond and the Cl atoms form single bonds. Therefore i think that the central C atom hybridizes into sp. if this is correct, my question is how do i know which p orbital on C to ...
April 29, 2009 by lyne

Chemistry
#1) The Lewis structure of PF3 shows that central phosphorus atom has ___ nonbonding and ___ bonding electron pairs. #2) How many equivalent resonance forms can be drawn for CO3^-2? (carbon is the central atom) #3) The bond angle in NF3 is slightly less than ___? #4) Sample of...
May 21, 2009 by Diana

chemistry
Sixteen electrons are present in the Lewis structure of which of the following molecules? CO2 N2O SO2 more than one correct response no correct response If more than one correct response please show all correct answers thank
February 23, 2014 by Johnny

chemistry
Most organic acids can be represented as RCOOH, where COOH is the carboxyl group and R is the rest of the molecule. (For example, R is CH3 in acetic acid, CH3COOH). (a) Draw a Lewis structure for the carboxyl group. (b) Upon ionization, the carboxyl group is converted to the ...
September 26, 2011 by Amber

Chemistry
Are Lewis acids and bases defined using dissociation, electron pairs, hydrogen ions, or hydroxide ions? Does a Lewis acid accept, produce, or donate hydrogen ions, or does it an electron pair acceptor?
March 31, 2010 by tori

AP Biology
The relatioship of structure to funtion is one of the major themes in biology. Describe the structure of enzymes and then expliain how the function (catalysis) is related to structure. Aslo discuss some factors that may affect the activity of the enzyme and how they do so.
September 30, 2007 by Kristen

Math Word Problem
During the summer throughout high school and for a year after, Lewis worked as a lifeguard at the beach. In that 5-year period, he saw a total of 461 dolphins swimming in the distance. About how many did Lewis spot per summer in the 5 summers he worked?
October 10, 2013 by Jared

Chemistry
Use VSEPR theory to predict the molecular geometry around either carbon atom in acetylene, C2H2. The Answer is linear. How do you figure out the answer is linear? I know you draw the lewis structure but when I drew it I thought the answer would be tetrahedral, because the ...
April 20, 2010 by Danielle

Chem
How would a Lewis Dot Structure be drawn for CO +1? I can't seem to get it to satisfy the octet rule and have the right number of electrons. How many electrons do you have? 1C = 1 x 4 = 4 electrons. 1O = 1 x 6 = 6 electrons. Total is 10 electrons. -1 electron because you have ...
December 5, 2006 by Alyssa

Chemistry
SO2 can be drawn as a molecule which satisfies the octet rule (using one double bond and a single bond) or as an expanded octet (using two double bonds). A measurement of the S-O bond distance demonstrates that the two bond lengths are identical. Does this clarify which Lewis ...
October 25, 2009 by Adam

Chemistry
I was asked this question for homework but I don't even know where to begin. It has 3 parts to answer. 1) add all lone pairs and make multiple bonds with the framework shown to satisfy the octets and make the best Lewis structure. 2) For the C-N bond(s) in each molecule ...
September 14, 2013 by George

math
beth and lewis buy the same amount of fish pellets if beth feeds her fish 14 fish pellets each day a container of pellets will last 20 days if lewis feeds his fish 8 fish pellets eah day how many more days will the container of pellets last lewis
November 7, 2012 by Anonymous

chemistry
Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. Water has the highest boiling point. B. Two lone pairs of electrons are assigned to the oxygen in each Lewis structure of all three molecules. C. Dispersion forces affect all three ...
February 4, 2008 by jose

chemistry
Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. H-O-H and C-O-H bond angles are all equal to 109.5. B. Dispersion forces affect all three molecules. C. Two lone pairs of electrons are assigned to the oxygen in each Lewis ...
February 9, 2008 by Anonymous

chemistry
Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. Two lone pairs of electrons are assigned to the oxygen in each Lewis structure of all three molecules. B. Dispersion forces affect all three molecules. C. H-O-H and C-O-H bond ...
February 10, 2008 by Anonymous

Chemistry
Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. Two lone pairs of electrons are assigned to the oxygen in each Lewis structure of all three molecules. B. H-O-H and C-O-H bond angles are all equal to 1095. C. Dispersion forces ...
May 3, 2008 by Tom

chemistry
Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. H-O-H and C-O-H bond angles are all equal to 1095. B. Two lone pairs of electrons are assigned to the oxygen in each Lewis structure of all three molecules. C. Dispersion forces ...
February 3, 2009 by Kyle

Organic Chemistry
This compound is characterized by ionic bonding between a group 1 metal cation and a tetrahedral anion. Write an appropriate Lewis structure for the anion and a specify a formal charge if there is one. NaBF4 I looked up the answer and I have a few questions on why it is the ...
January 21, 2008 by Aletha

Chemistry(Please check)
1) Which statement below is correct (true)? a) Since HNO2 is a stronger acid than HF it must have a greater pKa. b) Since HOCℓ is a stronger acid than HCN, then OCℓ– is a stronger base than CN–. c) The dissociation (or ionization) of HOCℓ in water is HOC&#...
March 24, 2012 by Hannah

chemistry
I have to draw the QMM of CL2C2. For the Lewis structure i think that the two C atoms form a triple bond and the Cl atoms form single bonds. Cl | C'triple bond'C | Cl Therefore i think that the central C atom hybridizes into sp. if this is correct, my question is how do i know...
April 29, 2009 by lyne

microeconomics
2) Select an organization with which you are familiar. Identify the market structure of your selected organization. Evaluate the effectiveness of this structure for the organization. 3) Analyze how organizations in each market structure maximize profits
June 2, 2010 by Brenda

chemistry
the number of nonbonding electrons exceeds the number of bonding electrons in the Lewis structure of which of the following molecules? HCN NH3 H2O more than one correct response no correct response if more than one correct response please show all correct responses. thanks
February 23, 2014 by Johnny

College Chemistry
BF3 can best be described through the lewis structure as? 1. It has less than an octet on at least one atom. or 2. It has less than an octet of electrons on all toms. I know that it is missing electrons in order to satisfy the octet. And Boron nor fluorine can make double ...
April 27, 2010 by James

chemistry (please someone help)
lewis acid or lewis base? then draw the product. H3C^+ :NH3 ----> I'm assuming H3C is the acid and :NH3 is the base? As for drawing out the product I dont know what to do.
February 7, 2013 by Maura

Chemistry
Hi! So, I thought I was very comfortable with distinguishing among Arrhenius, Bronsted-Lowry, and Lewis acids and bases. But then, I answered this question wrong and am looking for help because I'm not sure if my "second choice" answer is correct. The question asks: In the gas...
April 24, 2010 by JL

Chemistry
For a molecule of fluorous acid, the atoms are arranged as HOFO. What is the formal charge on each of the atoms? Enter the formal charges in the same order as the atoms are listed. (I searched everything online to find the shape of HOFO but could not find it--(they are wrong...
December 5, 2010 by Rita

Business Management
As your first job as the new manager at the outdated, adversarial company, write a plan for changing its organizational structure, incorporating the following elements: Your vision of the new organizational structure for your division including how you would realign ...
October 20, 2006 by K

chemistry
Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. Water has the highest boiling point. B. H-O-H and C-O-H bond angles are all equal to 1095. C. Dispersion forces affect all three molecules. D. Two lone pairs of electrons are ...
January 26, 2007 by helppleez

CHEM
if you were to draw a Lewis dot structure for HOCl...would it be H:Cl:O: (with double dots above & below the Oxygen & Chlorine) or would it be: H:O:Cl: (same thing for the double dots being above & below the Cl & O? Basically...is Oxygen the central atom in this case or is Cl ...
November 10, 2007 by K

chemistry
lewis acid or lewis base? then draw the product. H3C^+ :NH3 ----> I'm assuming H3C is the acid and :NH3 is the base? As for drawing out the product I dont know what to do.
February 7, 2013 by Maura

english
what does structure mean when writing an essay on ballads If you mean structure of the essay, that refers to how you organize your paragraphs within your paper. Are you following a comparison/contrast pattern? Are you explicating the poem? What you are writing about determines...
September 20, 2006 by shannon

Chemistry
I'm having difficulty on drawing lewis dot structures for certain compounds and figuring out the molecular shape. I can do the simple ones like IO4- which is tetrahedral...but i'm stumped on ICl4-. When i drew the structure I thought it was octahedral, but my textbook says it'...
October 7, 2006 by Melissa

BIOLOGY
how does the structure of DNA contribute to the accurate transmission of hereditary material? hereditary material Not much help courtney. I'd say its structure utilizing vanderwahls forces allows it to have a quaternary structure which takes up less space. (tightly coiled) Try...
November 20, 2006 by Alex- hlp plz

ESL
Please help me with this one. describe step by step how you would teach the following structures.include any visual aids you would use, what drilling (repetition)you would do and what your instructions should be.Structure 1 : where is it?is it on/in/under...... Structure 3:Can...
August 16, 2010 by Deya

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