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July 24, 2014

Search: Rank the crystal lattice structures in order of decreasing efficiency of space in the structure.

Number of results: 10,905

Chemistry
Can someone please help me with these chemistry questions...I just don't get it! 1. Using the following elements, rank them in order of increasing melting points, based on the periodic trend for melting point: Sr, Mg, Be, Ba? Would it be Be, Mg, Sr, Ba or would it be Ba, Sr, ...
September 16, 2009 by Taylor

Physics check
Rank the following transitions in order of low to high frequencies: 3-2; 4-3; 2-1; 5-4; 5-3; 3-1; 4-2. 5-3; 4-2; 3-1; 5-4; 4-3; 3-2; 2-1 ?
April 12, 2008 by Jeny

Physics (Please Help)
At the He-Ne laser wavelength (L= 632.8 nm) the refractive indices of crystal quartz are n o = 1.54264 and n e = 1.55171 calculated from its Sellmeier equation. The laser is incident from the air onto the surface of crystal quartz at an angle of incidence of 45 degrees. For ...
November 13, 2013 by Joy

Chemistry
Order the following solids according to increasing lattice energy. HgI2, CdCl2, ZnCl2 Now I get how to sort of do it, but I do not get how to do it if I'm looking at its radius if they do not provide it in the question.
February 21, 2010 by Josh

math
can someone make a lattice table. i have to multiply 523*73 using lattice multiplication. i know how to do it and have the numbers plugged in but without the table.
April 9, 2010 by jennifer

Science
The bonds between ions of opposite charge is strongest when the ions are small, the lattice energy of LiF is more exothermic than the lattice energy of CsI. Explain.
March 23, 2012 by Godswill

chemistry
the lattice energy for MgCl2 is -2326 kj/mol, which is much higher than that for NaCl which has a lattice energy of -786 kj/mol. Why is this so? Give at least two contributing factors.
April 3, 2014 by Mai

statistics
A senator asks his constituents to rank seven issues in order of importance. How many rankings are possible?
July 1, 2013 by Kathy

Chemistry
What is the coordination number of the ions in a face-centered cubic crystal? In a simple cubic crystal?
October 9, 2012 by Greg

Chemistry
Based on crystal field theory, which of the following metal ions will not be colored when placed in an octahedral crystal field? Au+ Fe3+ Ag+ Au3+ Nb3+
November 9, 2011 by Melody

Chemistry
The compound butane, has two structures. They have the same molecular formula but different arrangements of bonds in their structures. As a result, they can have different chemical and physical properties. Draw the lewis structures of all the isomers of pentane, C5H12. I am ...
November 16, 2011 by Hannah

Chemistry
Xrays with a wavelenth of 1.70A scatter at an angle of 21.5 degrees from a crystal. If n=1, what is the distance between planes of atoms in the crystal that give rise to this scatterying? So far I've gotten .367 radians but I have no idea where to go from there.
May 14, 2009 by gnozahs

Chemistry
Rank the following in order by increasing boiling point and explain why? CH3Cl Rn CH4 CH3-CH2-OH
March 8, 2011 by MMPM

Math (Combinatorics)
In the plane, the points with integer coordinates are called lattice points. Suppose a flea in the plane jumps from one lattice point to another. Each jump is one unit to the right, one unit to the left, one unit up, or one unit down. If the flea starts at the origin and makes...
April 29, 2013 by Bob

Math (Combinatorics)
In the plane, the points with integer coordinates are called lattice points. Suppose a flea in the plane jumps from one lattice point to another. Each jump is one unit to the right, one unit to the left, one unit up, or one unit down. If the flea starts at the origin and makes...
May 1, 2013 by Hale

Chemistry
The lattice enthalpies of NACL KCL and AGCL are 787,717 and 916 kj/mol; based on these values , arrange them in increasing order of water solubility and expain the answer.
March 13, 2014 by Punk marley

physics
a coconut is falling from a palm tree which of these is correct? velocity of coconut p.e of coconut 1-decreasing decreasing 2-increasing decreasing 3-increasing increasing 4-decreasing increasing
November 24, 2010 by sweetie

science (8th grade)
Which of the following is not a characteristic of a crystal? a. The arrangement of the atoms in a crystal determines its shapes. b. A crystalline structure is always geometric. c. Crystals are classified according to their mineral content. Please do not double post.
September 13, 2006 by tonya

Chemistry
Help arrange these elements in decreasing order of metallic property I, Mg, Al, Rb, Ca
November 14, 2011 by Anonymous

child
Rank the perspectives of language development in order of importance. Explain why you feel your first choice is the most important.
July 26, 2010 by tammy

statistics
rank the following in increasing order and find the position and value of the 91st percentile show all work. 4,,5,4,9,9,1,0,7,4,8,0,9
October 11, 2010 by mary

statistic
rank the following in increasing order and find the position and value of the 11th percentile show all work. 7 5 3 2 9 6 4 3 8 5 5 8
October 12, 2010 by janet

Chemistry.
An X-ray beam with = 151 incident on the surface of a crystal produced a maximum reflection at an angle of = 28.2. Part A Assuming , calculate the separation between layers of atoms in the crystal. Confused on which formula to use to find this answer.
January 29, 2013 by Brittany

Lattice method/math
How do you do lattice math? http://mathforum.org/library/drmath/view/52468.html what is the lattice method? hi i hate this method it suks now i need to do a report on it and i need information about its history aaaaaaaaaaahhhhhhhhhhhhhhhh dam this! can you do times in it i ...
September 19, 2006 by Ginner

Chemistry
Please help me arrange these elements in decreasing order of metallic property. I, Mg, Al, Rb, Ca Thank You
November 14, 2011 by Jennifer

chemistry
Rank the following compounds in order of increasing acid strength (1 = weakest, 4 = strongest) HClO HClO3 HClO2 HClO4
November 18, 2007 by mark

Chemistry
Rank the following compounds in order of increasing acid strength (1 = weakest, 4 = strongest) HCOOH CH2ClCOOH CHCl2COOH CH3COOH
November 20, 2007 by Matt

aed 202
rank the presepectives of language development in order of importance, explain why you feel your first choice is the most important
December 14, 2009 by lorraine

statistics
rank the following data in increasing order and find the position and value of the 94,51st percentile. show all work. 4,5,4,9,9,1,0,7,4,8,0,9
October 11, 2010 by mary

water treatment,chemistry
If the RQ is 6 and the k2t is 4, what is the removal efficiency of (CO2) of the co-current tower aerator. What will be the efficiency if a tower aeration with counter current flow is used instead? The efficiency of the co-current tower aerator (%): ____ The efficiency of the ...
October 4, 2013 by Anonymous

AP Chemistry
Iron has a density of 7.86 g/cm3 and crystallines in a body-centered cubic lattice. Show that only 68% of a body-centered lattice is actually occupied by atoms, and determine the atomic radius of iron.
November 14, 2009 by Angie

AP Chemistry
iron has a density of 7.86 g/cm3 and crystallizes a body centered cubic lattice. Show that only 68% of a body centered lattice is actually occupied by atoms, and determine the atomic radius of iron
November 27, 2012 by Shayla

chemistry
consider an x-ray tube with a Cun anode and a monochromator consisting of a Ni single crystal with (111) planes parallel to surface of crystal. what is the lowest voltage capable of producing X-rays trough a monochromator ? answer in V.
April 28, 2013 by himani.

chem
If pentane,hexane and hexanol are heated evenly at different altitudes, rank them according to the order in which you would expect them to begin boiling.
March 29, 2009 by alisha

Stats
Rank the following data in increasing order and find the position and value of the 56th percentile. Please show all of your work. 0 1 6 8 9 9 8 6 3 1 0 9
October 15, 2011 by Jennifer

physics
pipe to know how the inner diameter changes. Rank in order from largest to smallest the gas speeds va, vb, and vc at points a, b, and c. Explain in complete sentences.
June 21, 2012 by steph

satistics
Rank the following data in increasing order and find the position and value of the 65th percentile. Please show all of your work. 2 1 6 3 4 7 0 0 0 7 5 8
August 20, 2012 by latoya

Chemistry
Rank the following three elements in order of increasing Young'sModulus: Ge, Sn, Si. My answer is as follows: Sn<Ge<Si. I am not sure if this correct. Can someone verify. Thanks.
December 20, 2013 by Hil

IT210
Identify at least two data structures that are used to organize a typical file cabinet. Post actual pseudocode or code examples of these data structures. Why do you feel it is necessary to emulate these types of data structures in a computer program? For what kind of work ...
October 14, 2010 by Anonymous

Parametric equations/Trigonometry - Lattice points
A lattice point is a point with integer coordinates. How many lattice points (x,y) with -100 less than or equal to x less than or equal to 100 and -100 less than or equal to y less than or equal to 100 are on the graph of the parametric equations x=30-40 cos t y=-50 + 30 cos t...
December 10, 2013 by Sam

Biology
Name all the structures that bile passes through (in order) from its creation to where it actually functions.
October 17, 2011 by Teddy

chemistry
Consider an x-ray tube with a Cu anode and a monochromator consisting of a nickel single crystal with (111) planes parallel to the surface of the crystal. What is the lowest voltage capable of producing x-rays through a monochromator? Express your answer in V:
April 26, 2013 by Anonymous

percentile rank
i would like to able to find the percentile rank of a z score 0.313152 can someone tell me how to do this.
April 9, 2011 by Ann

math
a crystal in the shape of a cube is growing in a labatory. estimate the rate at which the surface area is changing with respect to the side length when the side length of the crystal is 3cm.
September 21, 2011 by navroz

PHYSICS
NEED HELP ON THE ANSWER OF THIS PROBLEM THE EFFICIENCY OF THE PULLEY DECREASES WITH A COEFFICIENT OF FRICTION OF 2.0 THE EFFICIENCY OF THE PULLEY IS 60% WHAT WOULD YOU EXPECT THE EFFICIENCY TO BE IF THE COEFFICIENT OF FRICTION INCREASED TO 0.3
November 1, 2010 by AMBER

chem
rank strongest acid to weakest acid? rank strongest acid to weakest acid H3CNH2 CH3C (triple bond) CH CH2=CHCH3 H20 CH4 i tried to rank them using the Pka values but I couldn't find the pKa value of the alkyne and I thought the H3CNH2 was the strongest but it's not?
February 15, 2011 by Yoo

Stats
If a student's rank in a class of 300 students is 111, find the student's percentile rank
December 7, 2013 by Justin

Chemistry
Draw Lewis dot structures, including appropriate resonance forms, and assign formal charges to each of those structures, for the molecule urea, with chemical formula NH2CONH2. You should find at least 3 such structures, some of which will have formal charges which are nonzero...
October 25, 2009 by Emma

Chemistry
Can someone explain hybrid structures and resonance structures.
March 2, 2010 by Chris

algeba
if a student's rank in a class of 400 students is 44 find the student's percentile rank.
July 5, 2011 by john peters

chemistry-lattice energy
Determine the lattice energy for CaBr2 if the enthalpy of solution for CaBr2 is -145 kJ/mol, and the heats of hydration for Ca2+ and Br- are -1650 kJ/mol and -292 kJ/mol respectively.
October 1, 2012 by Bru

chemistry
Based on position in the periodic table and electron configuration, arrange these elements in order of decreasing E_ i1
October 12, 2009 by lisa

Chemistry
H6P7: Young's Modulus Rank the following 3 classes of materials in order of increasing typical Young's Modulus: metals such as copper, plastics such as HDPE (high density polyethelene), and ceramics such as alumina (Al2O3). Do not look up the values of Young's Modulus, ...
November 29, 2012 by Odesa

Algebra
Im having a hard time figuring out this problem: Use the function, y=-(x+1)^2 +2, to answer the following parts. The increasing interval and decreasing interval To find both I believe that: increasing : x < -1 decreasing : x > 1 So is this on solution below Increasing ...
May 5, 2011 by Mike

Maths algebra
The efficiency of an industrial pump decreases by a fixed percentage each year. The percentage decrease each year is with respect to the efficiency of the pump at the start of each year. Over each four year period, the efficiency decreases by 80%. Let us write e = f(t) so that...
April 2, 2014 by Jasmine

Water treatment
If the RQ is 6 and the k2t is 4, what is the removal efficiency of (CO2) of the co-current tower aerator. What will be the efficiency if a tower aeration with counter current flow is used instead? what is the efficiency of the co-current tower aerator (%): what is the ...
September 30, 2013 by WT

computers
can the linear nested IF/ENDIF structures can contain other decision or looping structures inside their code block
August 24, 2010 by ty

Science
How do the structures of organisms compare and contrast to nonliving structures like construction cranes,ships,airplanes or bridges?
March 20, 2013 by Paul

Chemistry
You are conducting experiments with your x-ray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic x-rays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg angle, θhkl, at which you can expect to ...
December 14, 2012 by Odesa

Chemistry
rank the following atoms and ions in the order of expected increasing radius: Ca, Ca2+, Ar Pls pls help me kindly... Anyone?
November 18, 2012 by Anonymous

Resonance structures
I won't try to draw one here but take for example, CH3CH2COO-. This has two resonance structures but they look the same to me. The CH2-C single bond can rotate and it looks like you can just flip the COO- section and it looks like the same structure. Maybe that's the point. ...
September 30, 2006 by Sheryl

algebra
if a student rank in a class 400 is 87 waht id the student percentile rank
June 11, 2012 by marie

Maths please someone help me out!!!
3. The efficiency of an industrial pump decreases by a fixed percentage each year. The percentage decrease each year is with respect to the efficiency of the pump at the start of each year. Over each four year period, the efficiency decreases by 80%. Let us write e = f(t) so ...
April 3, 2014 by Jasmine

CHEMISTRY
Rank the following complex ions in order of increasing wavelength of light absorbed. (Use the appropriate <, =, or > symbol to separate substances in the list.) Co(H2O)63+, Co(CN)63-, CoI63-, Co(en)33+
March 19, 2012 by Sarah

CHEMISTRY
Rank the following complex ions in order of increasing wavelength of light absorbed. (Use the appropriate <, =, or > symbol to separate substances in the list.) Co(H2O)63+, Co(CN)63-, CoI63-, Co(en)33+
March 21, 2012 by Sarah

Economics
Rank in order from best to worst, the economic systems(command, market and mixed) according to which, in theory, best attempts to meet the conditions of The Human Development Index. Why did you rank them this way. I am thinking (in theory): 1-command 2-mixed 3-market The The ...
February 14, 2011 by Jeff

Chemistry
I don't understand this question and answer can someone help me? In order to exhibit delocalized pi bonding, a molecule must have . At least resonance 2 resonance structures. & In comparing the same two atoms bonded together, the greater the bond order, the shorter the bond ...
October 20, 2010 by Ana

Child Development
Rank the perspectives of language development in order of importance. Explain why you feel your first choice is the most important.
September 20, 2008 by Melvenia

child development
Rank the perspectives of language development in order of importance. Explain why you feel your first choice is the most important.
December 15, 2009 by lorraine

Math
Rank the following data in increasing order and find the positions and values of both the 39th percentile and 67th percentile. 5 9 9 0 7 2 5 6 9 1 0 6
November 10, 2011 by Jennifer

Chemistry
If the RQ is 6 and the k2t is 4, what is the removal efficiency of (CO2) of the co-current tower aerator. What will be the efficiency if a tower aeration with counter current flow is used instead? what is the efficiency of the co-current tower aerator (%): what is the ...
October 1, 2013 by WT

chem
Rank the size of a change in temperature of one degree Fahrenheit, one degree Celsius, and one kelvin. In other words, if a thermometer were to show that the temperature outside increased by these amounts, which change would feel the largest? If any of the options are the same...
September 16, 2013 by Cf

Physics help please!
The engine has an efficiency e1. The engine takes input heat Qh from a hot reservoir and delivers work W1. The heat rejected by this engine is used as input heat for a second engine, which has an efficiency e2 and delivers work W2. The overall efficiency of the two-engine ...
April 13, 2010 by Mike

Chemistry
The estimated lattice energy for is CsF2+2347kj/mol. Use the data given to calculate an overall energy change (in kilojoules per mole) for the formation of from its elements. Ea for F = -328 E11 forCs = +375.7 E12 for Cs = +2422 Heat of sublimation for Cs = 76.1 Bond ...
November 9, 2010 by diane

chem
Arrange the following amines in order of decreasing base strength. NH3, NH2Br, CH3NH2, (CH3)2NH
February 16, 2009 by help!!!

Chemistry
Arrange the following ions (Cu^2+. Zn^2+, Al^3+, and Mg^2+) in order of decreasing ability to be reduced. Could someone check my answer and see if it is right? Thanks Cu^2+ > Zn^2+ > Al ^3+ > Mg ^ 2+
May 11, 2009 by Anonymous

chemistry
How do you arrange these aqueous solutions in order of decreasing freezing point: 0.10 m Na3PO4, 0.35 m NaCl, 0.20 m MgCl2, 0.15 m C6H12O6, and CH3OOH?
September 8, 2012 by Anonymous

AP Chemistry
Which action(s) will decrease the equilibrium concentration of a non-reacting gas in water? 1. decreasing the temp. of the water 2. decreasing the volume of water 3. decreasing the pressure of the gas above the liquid a. 1 only b. 2 only c. 3 only d. 1 and 3 e. 1, 2, and 3
April 4, 2008 by Joe

chemistry
A chemical analysis indicates that a silicon crystal weighing 100g contains 16.5 mg of aluminum (Al) which is substitution-ally incorporated (the Al atoms replace some of the Si atoms). What is the number of extrinsic charge carriers in this crystal? Express your answer as ...
April 26, 2013 by Anonymous

7th grade Life Science
Which of the following structures does not provide support for invertebrae bodies? a)backbone b)tiny glass structures c)skin d)exoskeleton
May 22, 2009 by Brian

linear algebra
which of the following sets of vectors span R^3? a.){(1, -1, 2), (0, 1, 1)} b.) {1, 2, -1), (6, ,3, 0), (4, -1, 2), (2, -5, 4)} c.) {(2, 2, 3), (-1, -2, 1), (0, 1, 0)} d.) {(1, 0, 0), (0, 1, 0), (0, 0, 1), (1, 1, 1)} can someone show the steps to check for one of them and i ...
July 19, 2007 by chris

engineering science
A ramjet is to propel an aircraft at Mach 3 at high altitude where the ambient pressure is 8.5 kPaand the ambient temperature T-node is 220 K. The turbine inlet temperature T is 2540 K. If all components of the engine are ideal - that is, frictionless - determine (a) the ...
September 29, 2011 by david

Physics
The interatomic spacing in a crystal of table salt is 0.281 nm. This crystal is being studied in a neutron diffraction experiment, similar to the one that produced the photograph in the figure. How fast must a neutron (mass = 1.67 x 10^-27 kg) be moving to have a de Broglie ...
April 22, 2012 by Matt

CHemistry....Please help
How do you find out the coordination number of a crystal? For example im given a picture of the crystal structure of lithium sulfide Li2S. SO i need to find coordination number for: Li^+ S^2-
January 24, 2009 by Saira

chemistry
Place these hydrocarbons in order of decreasing boiling point: paraffin : methane: octane: isooctane: ( also known as 2,2,4 trimethylpentane) octadecane:
December 6, 2009 by ashely

science
name one example each of a solid, liquid and a gas. arrange them in the decreasing order or the kinetic energy possessed by the particles in them
August 30, 2010 by himansh patel

Chemistry
Place the following elements in order of decreasing atomic size: selenium, chlorine, fluorine, rubidium, calcium, and sulfur.
December 2, 2012 by James

Chemistry
Place the following elements in order of decreasing atomic size: selenium, chlorine, fluorine, rubidium, calcium, and sulfur.
December 2, 2012 by Jayden

chem
The crystal structure of lithium sulfide (Li2S) is pictured here. (Intro 1 figure) The edge length of the unit cell is 5.88*10^2^2 pm. i guess it is FCC ( face cenred cubic) 1-- What are the coordination numbers of and Li^+ and S^2- in the lithium sulfide crystal shown? Enter ...
January 24, 2009 by Dr Bob plz help

Physics
A beam of X-rays with a wavelength of 0.179nm is directed at an iron crystal whose planes have a spacing of 0.1013nm. How many diffraction peaks (each arising from a different order n) are possible? I'm really not sure how to go about solving this. Any help is appreciated. ...
September 19, 2012 by Bruce

Urgent Chem help.plz
The crystal structure of lithium sulfide (Li2S) is pictured here. (Intro 1 figure) The edge length of the unit cell is 5.88*10^2^2 pm. i guess it is FCC ( face cenred cubic) 1-- What are the coordination numbers of and Li^+ and S^2- in the lithium sulfide crystal shown? Enter ...
January 24, 2009 by Julia

English
1. May I take your order? 2. Would you like to order now? 3. Will you order? 4. Order, please. 5. Please order your food. 6. Are you ready to order? 7. Do you want to order? 8. Why don't you order? 9. How about ordering? 10. What do you think of ordering? (In a restaurant, can...
June 11, 2014 by rfvv

linear algebra
Determine whether {v1, v2, v3} is a basis for R3 v1 = [1] [-3] [1] v2 = [-3] [8] [4] v3 = [2] [-2] [2] Put the vectors as rows or columns in a matrix and perform Gaussian reduction to determne the row or column rank. In this case you should find that the rank is 3, therefore ...
August 5, 2007 by zinnia

physics
Two small stereo speakers A and B that are 1.40m apart are sending out sound of wavelength 33.5cm in all directions and all in phase. A person at point P starts out equidistant from both speakers and walks (see the figure (Figure 1) ) so that he is always 1.50m from speaker B...
July 1, 2013 by Avantika

CHEMISTRY
You are conducting experiments with your x-ray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic x-rays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg angle, θhkl, at which you can expect to ...
December 14, 2012 by luis

CHEMISTRY
You are conducting experiments with your x-ray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic x-rays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg angle, θhkl, at which you can expect to ...
December 14, 2012 by dato

matrices
Let A be a 5 by 4 matris and suppose that the system Ax=b has a solution. Explain why the solution is unique if and only if the rank of A is 4. I said that it is unique becaue the rank is equal to the number of columns. Do you have a better explaination.
August 4, 2008 by jen

Math
Can someone please help me with these three question? I having a very difficlut time answering them May first question To select a _________ sample, the population is divided into disjoint subgroups according to some characteristics like income level, and then a few ...
February 26, 2011 by Latisha

Chemistry
Draw the Lewis structures for BrO3- and ClO4- and indicate their correct number of additional resonance structures. I'm a little confused about this. For example, I've got the correct original form of BrO3- down. Where all 3 O atoms are single bonded to Br, and the Br itself ...
September 28, 2008 by Raj

social studies
which of the following contributed to Britain's industrial revolution? A. large labor force C. powerful monarchy B. decreasing food D. decreasing money
May 15, 2013 by Katie

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