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

Number of results: 13,658

Chemistry
Please help! Answer the following for a body centered unit cell. Crystalline Solids Program Answers should be numerical, set r = 4.0. edge in terms of r, the lattice pt radius: face diagonal in terms of r, the lattice pt radius: body diagonal in terms of r, the lattice pt radius:
Thursday, February 17, 2011 at 7:30pm by Shawn

Chemistry
27. Amorphous solids have crystal structures.- F? 32. Pure, crystalline solids freeze and melt at the same temperature.- F 34. Water expands as it freezes.- T Thanks -MC
Tuesday, October 26, 2010 at 4:38pm by mysterychicken

chemistry
Vanadium crystalizes in a body centered cubic lattice (the V atoms occupy only the lattice points) how many V atoms are present in a unit cell?
Thursday, January 20, 2011 at 9:58pm by Angela

Math
Can someone help me with this problem? I don't understand lattice multiplication. Use lattice multiplication to find the product (Hint: Remember to estimate first!) 124*56. Thanks for your help.
Friday, June 19, 2009 at 8:58pm by B.B.

Chemistry
X rays of wavelength 2.63 were used to analyze a crystal. The angle of first-order diffraction (n = 1 in the Bragg equation) was 16.14°. What is the spacing between crystal planes?(in pm) Do I just plug everything in the Bragg's equation? nλ=d*sinθ n=...
Tuesday, November 23, 2010 at 1:33pm by kay

chem
Rank the following compounds in order of decreasing boiling point: KCI CO2 CH2O
Sunday, December 7, 2008 at 9:19pm by Natash

science
Answer the following for a body centered unit cell. Answers should be numerical, set r = 7.0. edge in terms of r, the lattice pt radius__? face diagonal in terms of r, the lattice pt radius__? body diagonal in terms of r, the lattice pt radius__?
Monday, February 15, 2010 at 4:19pm by HELP!

Chemistry
CdO is cubic with a lattice constant a=4.695 A˚ and a density ρ of 8.15 g/cm3. Determine the crystal structure of CdO. Simple Cubic Face Centered Cubic Body Centered Cubic
Thursday, November 22, 2012 at 4:32am by c

chem
Complete the table below: Answer the following for a body centered unit cell. (Hint: Helpful information can be found by going to the "Lattice" menu, choosing "Cubic", and then choosing "Body-Centered" in the Crystalline Solids program.) ...
Monday, February 21, 2011 at 2:58am by brian

Lattice method/math
lattice math is sooooooooooooo easy i can do ,and i'm only 6
Tuesday, September 19, 2006 at 8:25pm by Nikole

pysical science
Just a hint and you do the rest. Potassium nitrate (KNO3) dissolved in water gets colder but a chemical reaction has not taken place. That's just due to the bonds breaking and it takes energy to break the bonds of the KNO3 crystal lattice.
Sunday, October 5, 2008 at 1:50pm by DrBob222

CHemistry...Please help
rank in order of most oh groups to least that will be the same as highest surface tension to lowest
Monday, January 19, 2009 at 2:45pm by bw

Science
This must refer to some lab experiemnt of data obtasined from an experiment. I have no idea what radiation was used, and what you mean by the "second peak." You also don't explain what "two theta" means in terms of the experiment. The lattice paramenter...
Wednesday, August 15, 2012 at 12:21am by drwls

Chemistry
r = 5.0. how do i find the following: -edge in terms of r, the lattice pt radius -face diagonal in terms of r, the lattice pt radius -body diagonal in terms of r, the lattice pt radius
Monday, February 15, 2010 at 6:34pm by Mary

math
Divide the numerators by the denominators, changing these fractions into equivalent decimals. Then it will be easy to rank order them.
Tuesday, April 23, 2013 at 3:27pm by Ms. Sue

Chemistry
Rank these aqueous solutions in order of decreasing freezing point: 1 m Na2SO4 1 m LiF 1.5 m CaCl2 1.5 m glycerol 2 m NH4Cl
Monday, August 30, 2010 at 8:07pm by Anonymous

Chemistry
Rank the following in order by increasing boiling point and explain why? CH3Cl Rn CH4 CH3-CH2-OH
Tuesday, March 8, 2011 at 1:37pm by MMPM

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
Tuesday, October 12, 2010 at 7:59am by janet

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
Monday, October 11, 2010 at 11:43pm by mary

child
Rank the perspectives of language development in order of importance. Explain why you feel your first choice is the most important.
Monday, July 26, 2010 at 10:31pm by tammy

chemistry
Answer the following for a face centered unit cell. r=6.0 edge in terms of r, the lattice pt radius face diagonal in terms of r, the lattice pt radius body diagonal in terms of r, the lattice pt radius
Monday, February 18, 2008 at 9:06pm by Kacy

chemistry
Answer the following for a body centered unit cell. edge in terms of r, the lattice pt radius face diagonal in terms of r, the lattice pt radius body diagonal in terms of r, the lattice pt radius
Monday, February 18, 2008 at 9:04pm by Stacy

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.
Sunday, February 21, 2010 at 7:08pm by Josh

Lattice method/math
1. multiply each number from the top to side 2. put the proudut in the boxs under the little box 3.ADD what you got and on the bottom of your lattice box 4.enjoy
Tuesday, September 19, 2006 at 8:25pm by ashia danielle willam

Chemistry
What is the enthalpy change (in kJ/mol) for the following process? Na+(g) + Br-(g) --> NaBr (s) Hint: use the Born-Haber cycle Note: the reference state for Br2 is Br2(l) not Br2(g) Data (in kJ/mol): enthalpy of sublimation of Na(s): 107 standard enthalpy of formation ...
Tuesday, February 1, 2011 at 11:50pm by Crystal

aed 202
rank the presepectives of language development in order of importance, explain why you feel your first choice is the most important
Monday, December 14, 2009 at 6:00pm by lorraine

Chemistry
Rank in order of decreasing average molecular speed at 21 degrees celsius: Ne, HBr, SO2, NF3, CO
Monday, November 2, 2009 at 9:57pm by Emory

Chemistry
Rank the following compounds in order of increasing acid strength (1 = weakest, 4 = strongest) HCOOH CH2ClCOOH CHCl2COOH CH3COOH
Tuesday, November 20, 2007 at 7:32pm by Matt

chemistry
Rank the following compounds in order of increasing acid strength (1 = weakest, 4 = strongest) HClO HClO3 HClO2 HClO4
Sunday, November 18, 2007 at 10:14am by mark

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 ...
Wednesday, November 16, 2011 at 5:36pm by Hannah

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
Monday, August 20, 2012 at 1:03pm by latoya

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
Saturday, October 15, 2011 at 12:24pm by Jennifer

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
Monday, October 11, 2010 at 11:19pm by mary

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.
Sunday, March 29, 2009 at 11:06pm by alisha

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.
Friday, April 9, 2010 at 10:26am by jennifer

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. http://en.wikipedia.org/wiki/Crystal
Wednesday, September 13, 2006 at 9:04pm by tonya

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.
Friday, March 23, 2012 at 12:07am by Godswill

Chemistry
Rank order of ascending size Na, Na+, F, F -
Friday, November 18, 2011 at 5:39pm by arlene

Chemistry-Science
Answer the following for a primitive cubic unit cell. Answers should be numerical, set r = 8.0 -edge in terms of r, the lattice pt radius:___ -face diagonal in terms of r, the lattice pt radius:___ -body diagonal in terms of r, the lattice pt radius:___ Answer the following ...
Saturday, February 14, 2009 at 6:07pm by Bliss

Chemistry
Answer the following for a face centered unit cell. r = 6.0. how do i find the following edge in terms of r, the lattice pt radius face diagonal in terms of r, the lattice pt radius body diagonal in terms of r, the lattice pt radius
Monday, February 15, 2010 at 6:36pm by Mary

algeba
if a student's rank in a class of 400 students is 44 find the student's percentile rank.
Tuesday, July 5, 2011 at 12:53am by john peters

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.
Saturday, April 9, 2011 at 10:05am by Ann

algebra
if a student rank in a class 400 is 87 waht id the student percentile rank
Monday, June 11, 2012 at 1:58am by marie

CHEMISTRY
I am confused about this statement about water Which of the following is TRUE regarding water only covalent bonds are broken when ice melts (dont think so) all of the staements (A-D) are false energy must be given off in order to break down the crystal lattice of ice to a ...
Tuesday, May 11, 2010 at 8:13pm by Andy

King
3/8 = 0.375 5^-3 = 0.008 0.003 √5 = 2.236 4/7 = 0.571 Now that they are all decimal numbers, you should be able to rank order them.
Thursday, January 3, 2013 at 3:23pm by Ms. Sue

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?
Tuesday, February 15, 2011 at 5:05am by Yoo

APCHemistry
Hi these are the posts from earlier---i just had a quetsion about your response: ""Apchemistry - DrBob222, Monday, April 26, 2010 at 7:10pm Your thinking is ok. All ionic solids, although composed of ions, are locked into place by the crystal lattice structure of the...
Monday, April 26, 2010 at 8:07pm by Kiki

Chem
Rank thefollowing elements in order of decreasing atomic radius. N, B, Be, Li? I thought it was N, B, Be, Li
Monday, November 14, 2011 at 8:56pm by Anna

chem-intermolec forces
You really need to define what you mean by covalent bond in order for us to answer this question. For example, hydrogen bonds are broken when C2H5OH is boiled but H bonds are only about 1/20 as strong as a regular covalent bond. Same thing for crystal structure. Are the bonds ...
Tuesday, December 2, 2008 at 5:41pm by DrBob222

Biology
Name all the structures that bile passes through (in order) from its creation to where it actually functions.
Monday, October 17, 2011 at 6:36pm by Teddy

Chem help
Here is a site that give you some insight on lattice energy. http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch7/lattice.html Yes, paramegnetic species will be those that have unpaired electrons. s and p.
Wednesday, November 28, 2007 at 1:01pm by DrBob222

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...
Wednesday, May 1, 2013 at 6:41am by Hale

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 ...
Monday, February 14, 2011 at 12:33pm by Jeff

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
Thursday, November 10, 2011 at 7:40pm by Jennifer

child development
Rank the perspectives of language development in order of importance. Explain why you feel your first choice is the most important.
Tuesday, December 15, 2009 at 5:16pm by lorraine

Child Development
Rank the perspectives of language development in order of importance. Explain why you feel your first choice is the most important.
Saturday, September 20, 2008 at 7:34pm by Anonymous

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.
Thursday, June 21, 2012 at 11:38pm by steph

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 ...
Thursday, October 14, 2010 at 9:16pm by Anonymous

Chemistry
This forum is not well suited for diagrams, including Lewis dot structures. The best way to see these is to google Lewis dot structures and add the molecule you want. Chances are you can find it. There are some sites that give detailed instructions on drawing Lewis dot ...
Wednesday, May 23, 2012 at 3:32pm by DrBob222

Chemistry
Can someone explain hybrid structures and resonance structures.
Tuesday, March 2, 2010 at 7:03pm by Chris

Chemistry
rank the following atoms and ions in the order of expected increasing radius: Ca, Ca2+, Ar Pls pls help me kindly... Anyone?
Sunday, November 18, 2012 at 9:05am by Anonymous

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 ...
Thursday, November 29, 2012 at 12:13am by Odesa

Chemistry
There are a number of things to look at. For a, HCl is largely a covalent bond (although polar covalent) while KCl is an ionic solid. Ionic solids melt higher than most covalently bonded materials because the ionic solids must break the crystal lattice bonds. Cu has metallic ...
Monday, February 28, 2011 at 6:46pm by DrBob222

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...
Wednesday, October 20, 2010 at 6:35am by Ana

chemistry
What information do you have or what information can you obtain? delta Hsolution = delta Hhydration - delta Hcrystal lattice
Monday, February 1, 2010 at 4:09pm by DrBob222

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...
Sunday, October 25, 2009 at 11:47am by Emma

Chemistry
You can see from your attempt at drawing structures that this site can't handle spaces. We can't draw structures on this forum.
Wednesday, December 19, 2012 at 10:23pm by DrBob222

class rank
what does the class rank 1 out of 120 mean?
Monday, November 30, 2009 at 10:59pm by james

physics
5- Consider Close packing of spheres as shown in figure. a- What is the lattice corresponding to this arrangement? b- What axes can be defined for this lattice? c- What are the primitive axes? d- How many spheres are there in a cell? Hint: add sphere fractions inside the cell.
Saturday, April 26, 2008 at 8:44am by Anonymous

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 ...
Thursday, July 19, 2007 at 2:02pm by chris

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
Tuesday, November 27, 2012 at 8:40pm by Shayla

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.
Saturday, November 14, 2009 at 11:50am by Angie

Science
How do the structures of organisms compare and contrast to nonliving structures like construction cranes,ships,airplanes or bridges?
Wednesday, March 20, 2013 at 7:35pm by Paul

Chemistry
This type of o-chem question requires providing structures, and the ability for someone asking them to provide/draw structures on this fourm.
Tuesday, January 29, 2013 at 1:02pm by Devron

computers
can the linear nested IF/ENDIF structures can contain other decision or looping structures inside their code block
Tuesday, August 24, 2010 at 7:59pm by ty

biology
Choose two structures of bacterial cells and explain how these structures allow bacteria to function as unicellular organisms.
Saturday, April 12, 2008 at 8:56am by Anonymous

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, ...
Wednesday, September 16, 2009 at 5:52pm by Taylor

Chemistry
In melting a solid the crystal lattice is broken down and the molecules that were in a fixed position are free to move around. Evaporation takes it one step further. As molecules gain more energy in the liquid state (from heating, the sun, normal vapor pressure, etc), the more...
Wednesday, May 19, 2010 at 2:14pm by DrBob222

Chemistry*Dr.Bob
I keep finding all sorts of different enthalpy of vaporizations for bromine. I used: 254.66 So factoring 254.66/2 into my equation below i ended up with a lattice energy of -863.33. Can you confirm this? ____________________________________________________________ What is the ...
Wednesday, February 2, 2011 at 10:12am by Crystal

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 ...
Tuesday, September 19, 2006 at 8:25pm by Ginner

chem hw
Assuming equal concentrations, rank these aqueous solutions by their freezing point: Li2SO4, Li3PO4, SnCl4, NH4Br. (from highest freezing point to lowest freezing poinT) Is the order Li3PO4, Li2SO4, SnCl4, and NH4Br???????? If not what is the correct order?
Sunday, February 19, 2012 at 1:46am by Amy

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 ...
Saturday, September 30, 2006 at 1:41am by Sheryl

Chemistry
True that d is a higher T BUT think how order the solid crystal is versus how random the gas molecules are. I would go with b.
Sunday, November 15, 2009 at 4:54pm by DrBob222

child development
Rank the perspectives of language development in order of importance. Explain why you feel your first choice is the most important. this is the question that i submitted to you I wantedto know what you mean by study them.
Tuesday, December 15, 2009 at 5:23pm by lorraine

Math
Carrie and Crystal live at a equal distances from school. Carries walks to school at an average rate of 3 miles per hour and Crystal rides her bike at an avergae rate of 9 miles per hour. It takes Carrie 20 minutes longer than Crystal to get to school. How far do Crystal and ...
Saturday, March 20, 2010 at 10:04am by David

math
If a student's percentile rank in a class of 400 students is 87, find the student's class rank.
Sunday, March 4, 2012 at 9:05pm by Anonymous

Math
If a student's percentile rank in a class of 400 students is 87, how do I find the student's class rank.
Saturday, February 26, 2011 at 10:01pm by David

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.
Monday, August 4, 2008 at 1:42am by jen

Chemistry
Rank the ions in order of decreasing size. Sr2+, Ba2+, Cs Cs>Ba>Sr
Friday, November 9, 2007 at 5:11pm by Sally

chemistry
Rank the following compounds in order of decreasing boiling point: sodium fluoride ( \rm NaF ), methane ( \rm CH_4 ), fluoromethane ( \rm CH_3F )
Sunday, August 21, 2011 at 5:03pm by nurul

Chemistry
Rank the following fertilizers in decreasing order of mass percentage of nitrogen: NH3 NH4NO3 (NH4)2HPO4 KNO3 (NH4)H2PO4 (NH4)2SO4
Sunday, January 16, 2011 at 1:37am 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
Friday, May 22, 2009 at 7:32pm by Brian

chemistry
Lattice energy is higher for higher charge on the ions; therefore, you would pick CaO or CaS as higher than LiF and LiI. Then the larger size of the ions decreases lattice energy; therefore, LiI is lower than LiF and CaS should be lower than CaO. I would go with CaO as having ...
Monday, February 18, 2013 at 10:43pm by DrBob222

psychology
Tonite seems to be the night for Hum 130 questions. We will be happy to critique your thinking. I personally think that rank order ranking is a better name than differential continuity. You can find these easily with a google search.
Tuesday, July 28, 2009 at 8:18pm by bobpursley

pH levels
Rank the following solutions in order of decreasing [H3O^+]. .10 M HC2H3C2 .10 M HC6H5O .10 M HF ,10 M HBr I think the correct order is: HBr>HF>HC2H3C2>HC6H5O am i right?
Sunday, March 21, 2010 at 4:28pm by Kyle

chemistry
what is the crystal system of the crystal structure of cesium chloride
Monday, April 1, 2013 at 6:21am by adex

science
Is a snowflake a crystal? Can you show me a website were i can read about what a crystal is?
Monday, October 22, 2012 at 4:15pm by J

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