Sunday

December 21, 2014

December 21, 2014

Number of results: 40

**chemistry**

Is the calculation of percentage of each atom within a Body centered cubic cell AKA volume of the BCC cell same as the atomic packing factor for the BCC unit cell. The BCC % is 68%. the atomic packing factor is just 0.68. Am I completely wrong? And also how do i calculate the ...
*January 13, 2010 by Anonymous*

**Statistics**

Could someone help out with this question. The answer is 1842, but i'd like to know how to solve it. Thanks BCC wants to estimate the proportion of its students who are single parents. How many students should BCC survey if it wants to be 99% confident that the sample ...
*October 28, 2011 by Jay Ortwein*

**chemistry**

What is the plane and lattice structure that is represented in this picture? SC (100) BCC (100) FCC (100) SC (110) BCC (110) FCC (110) SC (111) BCC (111) FCC (111)
*April 26, 2013 by Maikol*

**Chemistry**

Find the unit cell (simple, bcc, fcc), type of holes where the smaller ions are found (tetrahedral, octrahedral, cubic), and number of cations and anions per unit cell for the following compounds: CdSe CsI Li2O KBr NaCl ZnS(I) i did this and i got most of my answers wrong!!! ...
*February 15, 2010 by kooler*

**bcc**

what are the changes to n02 levels in one day
*September 15, 2010 by luke*

**Chemistry**

An element has bcc packing with a body-centered cubic unit cell. Its density is 19300 kg/m3 and the unit cell volume is 3.17 x 10-26 L. Calculate the molar mass (g/mol) of the element to three significant figures. The element rubidium has bcc packing with a body-centered cubic...
*February 8, 2010 by Dan*

**bcc**

how do you work equation dealing friction and newtons when pulling the distance of a block
*February 26, 2010 by jack*

**Physics**

Sodium has bcc packing. If a distance between two nearest atoms is 3.7 A* then what is the lattice parameter?
*April 19, 2012 by Tulika*

**Bcc **

suppose x has a mound-shaped distribution with sigma=3. Find the minimal sample size required so that for a 95% confidence interval, the maximal margin of errors is E=0.4
*December 4, 2014 by Yira f *

**Science/math**

BCC crystal structure, atomic radius of .1363, and an atomic weight of 95.94g/mol. How would you compute the theoretical density?
*September 15, 2009 by Z32*

**AP chem**

I have a problem set due tomorrow, and two problems in it were not covered in class. The first is this: Molybdenum has an atomic radius of 0.145 nm. The volume of its cubic unit cell is 0.0375 nm^3. What is the geometry of the molybdenum unit cell? I have no idea where to even...
*December 7, 2006 by chris*

**math**

an element has a BCC structure with cell edge of 288pm. the density of the element is 7.2g/cm3. how many atom are present in 208g of the element?
*January 1, 2013 by ahamad sultan*

**chemistry**

Determine the radius of the largest atom that can be accommodated in the interstices of BCC iron (Fe) without stress. (Hint: the center of the largest site is at ½, ¼, 0; draw a unit cell - it helps.)
*April 3, 2013 by adex*

**chemistry**

Determine the radius of the largest atom that can be accommodated in the interstices of BCC iron (Fe) without stress. (Hint: the center of the largest site is at ½, ¼, 0; draw a unit cell - it helps.)
*April 4, 2013 by adex*

**chemistry**

The element K has bcc packing with a body-centered cubic unit cell. The density of K is 0.862 g/mL. Calculate the volume (L) of the unit cell of K.
*February 21, 2009 by tweety*

**Biomaterials**

What is the theoretical density of tantalum (Ta) with the following characteristics: Crystal structure: BCC Atomic radius: 14.6 Angstroms Atomic weight: 180.9 g/mol density needs to be in g/cm^3
*May 22, 2012 by Nate*

**chemistry**

The element Rb has bcc packing with a body-centered cubic unit cell. The density of Rb is 1.532 g/cm3 and the cell volume is 1.852 x 10-22 mL. Calculate the value of Avogadro's number to three significant figures based on these data.
*February 21, 2009 by tweety*

**bcc**

if you put honey,water,dishwashing liquid and vegetable oil in a clear jar and then you add asmall of plastic cup, plastic fork, straw and a small piece of styrofoam cup.
*February 26, 2010 by jack*

**chemistry**

Determine the radius of the largest atom that can be accommodated in the interstices of BCC iron (Fe) without stress. (Hint: the center of the largest site is at ½, ¼, 0; draw a unit cell - it helps.) Radius (in centimeters):
*April 2, 2013 by adex*

**chemistry**

The element lithium has bcc packing with a body-centered cubic unit cell. The volume of the unit cell is 4.32 x 10-26 L. Calculate the density (g/cm3) of the element.
*February 21, 2009 by tweety*

**Chemistry**

The element niobium has bcc packing with a body-centered cubic unit cell. The volume of the unit cell is 3.59 x 10-26 L. Calculate the density (g/cm3) of the element
*May 12, 2010 by Anon*

**chemistry**

how do i calculate the volume of a unit cell and volume of atoms within a unit cell for FCC and BCC
*February 11, 2010 by blasting*

**algebra**

The number of computers sold by BCC depends on the dollar amound,x, that they spend on advertising. How much must they spend to sell 200 computers? Round to the nearest dollar and do not include units in your answer. N(x)=100+20 * In(0.25x)
*June 29, 2011 by Katie*

**Math Alg2**

The number of computers sold by BCC depends on the dollar amount, x, that they spend on advertising. How many computers will they sell by spending $100,000 on advertising? Round to the nearest whole number and do not include units in your answer.
*April 12, 2012 by Moonshadow*

**Bcc**

suppose x has a mound-shaped distribution. A random sample size 16 has a sample mean of 10 and a sample standard deviation of 2. Find 99% cinfidence interval for mue (mean) using a student's t distribution.
*December 4, 2014 by Yira f *

**Math- Alg 2**

The number of computers sold by BCC depends on the dollar amount, x, that they spend on advertising. How many computers will they sell by spending $80,000 on advertising? Round to the nearest whole number and do not include units in your answer. N(x) = 100 + 20 * In(0.25x)
*January 26, 2012 by CAMILA*

**bcc**

One canned juice drink is 30% orange juice, another is 10% orange juice. How many liters of each should be mixed together in order to get 20L that is 18% orange juice?
*November 23, 2011 by ms*

**chemistry**

Find the unit cell (simple, bcc, fcc), type of holes where the smaller ions are found (tetrahedral, octrahedral, cubic), and number of cations and anions per unit cell for the following compounds: CdSe CsI Li2O KBr NaCl ZnS(I)
*February 12, 2008 by jina*

**math**

what is the number of each atom in the unit cell of a BCC cystalline structure unit cell. I know its 2 atoms=8/8 +1 Calculate what % of each atom is contained within the unit cell? How do I do this
*January 13, 2010 by Anonymous*

**Chem: x-ray**

Experiment to obtain the X-ray diffraction peaks of an unknown metal. Radiation is K_alpha from Cu. Through these diffraction peaks you wanted to determine: (a) whether the cell is SC, BCC, or FCC (b) the (hkl) value of the peaks (c) the lattice parameter a of the metal sin^2(...
*July 26, 2014 by Anonymous*

**bcc**

the tail weighed 9 pounds. the hyead weighed as much as the tail plus 1/3 of the body combined, and the body weighed as much as the head and tail combined. what was the total weight of the fish?
*February 20, 2014 by handel*

**Difracction problem**

Diffraction from an unknown cubic metal is observed to occur at the following values of θ when using CuKα radiation. Determine the crystal structure to find the lattice constant. 20.1⁰, 29.2⁰, 36.6⁰, 43.5⁰, 50.2⁰, 57.4⁰, 65.5&#...
*June 2, 2013 by Eys*

**Chemistry**

Calculate the radius of a vanadium atom, given that V has a BCC crystal structure, a density of 5.96 g/cm3, and an atomic weight of 50.9 g/mol. I used this equation: density = (2)*(atomic weight) / (volume of unit cell)*(Avagodro's #) rearranged to find the volume of the unit ...
*January 16, 2013 by Kyle*

**Chemistry**

Calculate the radius of a vanadium atom, given that V has a BCC crystal structure, a density of 5.96 g/cm3, and an atomic weight of 50.9 g/mol. I used this equation: density = (2)*(atomic weight) / (volume of unit cell)*(Avagodro's #) rearranged to find the volume of the unit ...
*January 16, 2013 by Kyle*

**Chemistry**

(a) The phase diagram of the binary system, neodymium-scandium ( Nd-Sc ) is given below. There are two polymorphs in the solid state: alpha which is hexagonal close packed (HCP) and beta which is body-centered cubic (BCC). Identify all phases present at points 1, 2, and 3. ...
*December 11, 2012 by Odesa*

**chemistry**

This problem is from my chemistry book and I am having a little trouble with the intermediary steps: Barium metal crystallizes in a body- centered cubic lattice (atoms at lattice points only) The unit cell edge length is 502 pm, and the density of the metal if 3.5g/cm^3. (...
*May 18, 2010 by Tokey*

**chemistry**

(a) The phase diagram of the binary system, neodymium-scandium (Nd-Sc) is given below. There are two polymorphs in the solid state: α which is hexagonal close packed (HCP) and β which is body-centered cubic (BCC). Identify all phases present at points 1, 2, and 3. ...
*December 17, 2012 by anita*

**Chemistry**

DECOMPOSITION OF NO2 (10/10 points) The decomposition of NO2 at room temperature exhibits the following variation in concentration with time: The concentration of NO2 is expressed in mol/liter, while time is expressed in seconds. [NO2] ln[NO2] 1/[NO2] Time (s) 0.0831 -2.4877 ...
*July 30, 2014 by 3.091*

**Chemistry**

1- Which of these processes will lower the glass transition temperature of a glass? Increase the cooling rate Decrease the cooling rate Increase amount of network modifier Decrease amount of network modifier Quench the glass to cool the surfaces quickly Decrease the number of ...
*October 29, 2013 by youlifex*

**Chemistry**

1- Which of these processes will lower the glass transition temperature of a glass? Increase the cooling rate Decrease the cooling rate Increase amount of network modifier Decrease amount of network modifier Quench the glass to cool the surfaces quickly Decrease the number of ...
*October 30, 2013 by youlifex*

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