Recent questions tagged calculations-involving-unit-cell-dimensions

A metal crystallises into two cubic phases,face centred cubic (FCC) and body centred cubic (BCC),whose unit cell length are 3.5 and $3.0A^{\large\circ}$,respectively.Calculate the ratio of densities of FCC and BCC.

asked Jul 17, 2014 by sreemathi.v

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Chromium metal crystallises witha body-centred cubic lattice.The length of the unit cell edge is found to be 287pm.Calculate the atomic radius.What would be the density of chromium in $g/cm^3$?

asked Jul 17, 2014 by sreemathi.v

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A unit cell of sodium chloride has four formula units.The edge length of the unit cell is 0.564nm.What is the density of sodium chloride?

asked Jul 17, 2014 by sreemathi.v

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A sample of wustite $Fe_xO$ contains one Fe(III) for every three Fe(II).Calculate the value of $x$

asked Jul 16, 2014 by sreemathi.v

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LiI occurs as cubical-closest packing.If the edge length of a unit cell is 624 pm,determine the ionic radii of $Li^+$ and $I^-$ ions.

asked Jul 16, 2014 by sreemathi.v

1 answer

$KCl$ crystallizes in the same type of lattice as does $NaCl$.Givn that $\large\frac{r_{Na^+}}{r_{Cl^-}}$$=0.5$ and $\large\frac{r_{Na^+}}{r_{K^+}}$$=0.7$.Calculate the ratio of the side unit cell for $KCl$ to that for $NaCl$,and the ratio of density of $NaCl$ to that of $KCl$

asked Jul 16, 2014 by sreemathi.v

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If the radius of $Cs^+$ is 169pm and that of $Cl^-$ is 181pm,predict the structure of CsCl.What is the coordination number of $Cs^+$ ion?

asked Jul 16, 2014 by sreemathi.v

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A solid $A^+B^-$ has an NaCl type closest packed structure.If the radius of the anion is 250pm,what is the radius of the cation?

asked Jul 16, 2014 by sreemathi.v

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The atomic radius of strontium is 215pm and it crystallizes with a cubical closest-packed structure.Calculate the density of strontium.The molar mass of strontium is $87.6gmol^{-1}$.

asked Jul 16, 2014 by sreemathi.v

1 answer

Caesium chloride may be considered to form interpenetrating simple primitive cubic crystals.The edge length of unit cell is 412pm.Determine the ionic radius of $Cs^+$ if the ionic radius of $Cl^-$ is 181pm.Given :M(Cs)=$133gmol^{-1}$

asked Jul 16, 2014 by sreemathi.v

1 answer

Caesium chloride may be considered to form interpenetrating simple primitive cubic crystals.The edge length of unit cell is 412pm.Determine the density of CsCl.Given :M(Cs)=$133gmol^{-1}$

asked Jul 16, 2014 by sreemathi.v

1 answer

The edge length of a cubic unit cell of metallic calcium is 556pm.If the density of calcium is $1.54gcm^{-3}$ and its molar mass is $40.08gmol^{-1}$,calculate the radius of calcium atom

asked Jul 16, 2014 by sreemathi.v

1 answer

Calculate the radius of molybdenum atom if the element crystallizes as body-centred cubic crystals.Given : Density of $Mo=10.3gcm^{-3}$ and molar mass of $Mo=95.94gmol^{-1}$ .

asked Jul 16, 2014 by sreemathi.v

1 answer

An ionic compound has a unit cell consisting of A ions at the corners of a cube and B ions on the centres of the faces. If side length is 10$A^{\large\circ}$, what is the density of the solid assuming atomic weights of A and B as 50 and 100 gms respectively.

asked Jul 15, 2014 by balaji.thirumalai

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A metal crystallizes in two cubic phases FCC and BCC with unit length equal to 350 pm and 300 pm. The ratio of densities of FCC and BCC is about?

asked Jul 15, 2014 by balaji.thirumalai

1 answer

A substance which has a face centered cubic crystal has a density of 1.984 gcm$^{-3}$ and the edge length of the unit cell equal to 630 ppm. What is the molar mass of the substance?

asked Jul 15, 2014 by balaji.thirumalai

1 answer

The cubic unit cell of aluminium has an edge length of 405 pm. If its density is 2.7 gcm$^{-3}$, what is the type of unit cell? (Note: Molar mass = 27 g/mol)

asked Jul 15, 2014 by balaji.thirumalai

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The unit cell length of sodium chloride crystal is 564 pm. What is its density?

asked Jul 15, 2014 by balaji.thirumalai

1 answer

A metal crystallises into two cubic phases , face-centered cubic (fcc) and body centered (bcc) whose unit lengths are $3.5 \;and\;3.0 A^{\large\circ}$ respectively . Calculate the ratio of densities of fcc and bcc.

asked Apr 9, 2014 by sharmaaparna1

1 answer

Cu metal crystallises in face centered cubic lattice with cell edge , a = 361.6 pm . What is the density of Cu crystal ? (Atomic mass of copper = 63.5 amu , $N_A = 6.023\times10^{23}$

asked Apr 9, 2014 by sharmaaparna1

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The density of crystalline sodium chloride is $2.165g cm^{-3}$ . What is the edge length of the unit cell.

asked Apr 9, 2014 by sharmaaparna1

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Silver crystallises in a face centered cubic unit cell . The density of Ag is $10.5 g cm^{-3}$. Calculate the edge length of the unit cell .

asked Apr 8, 2014 by sharmaaparna1

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The density of a pure substance 'A' whose atoms pack in cubic close pack arrangement is 1g m/cc . If B atoms can occupy tetrahedral voids and all the tetrahedral voids are occupied by 'B' atoms what is the density of resulting solid in gm/cc . [Atomic mass (A) = 30 gm/mol and atomic mass (B) = 50gm/mol]

asked Apr 7, 2014 by sharmaaparna1

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Vanadium crystallises with a body centered cubic structure with a unit cell of side length $3.011A^{\large\circ}$. Calculate the atomic radius and density (V = 50.94)

asked Feb 27, 2014 by sharmaaparna1

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The densities of NaCl crystal as measured by Spectrometer and X - ray method are $2.165\times10^3 kgm^{-3}$ and $2.178\times10^3 kgm^{-3}$, respectively . The fraction of unoccupied sites in sodium chloride crystal is

asked Feb 27, 2014 by sharmaaparna1

1 answer

$CsBr$ crystallises in a body centered cubic lattice. The unit cell length is $436.6\; pm$ . Given that the atomic mass of $Cs = 133$ and of $Br = 80\; amu$. Avogadro's number being $6.02\times10^{23}mol^{-1}$ The density of $CsBr$ is

asked Feb 27, 2014 by sharmaaparna1

1 answer

Silver (atomic weight = $107.88$) crystallises with f.c.c lattice for which the side length of the unit cell is $4.0774\overset{\circ}{A}$. Density of $Ag$ is $10.53\; g\;cm^{-3}$. Calculate the Avogadro's number.

asked Feb 27, 2014 by sharmaaparna1

1 answer

CsBr has b.c.c structure with edge length $4.3 A^{\large\circ}$. The shortest inter ionic distance between $Cs^+$ and $Br^-$ is

asked Feb 27, 2014 by sharmaaparna1

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A metal M(at.wt = 40.0) depending on temperature crystallises in f.c.c and b.c.c structure whose unit cell length are 3.5 and $3.0 A^{\large\circ}$ respectively. The ratio of its densities in f.c.c and b.c.c structures is

asked Feb 25, 2014 by sharmaaparna1

1 answer

A unit cell of NaCl has four formula units. The edge length of unit cell is 0.564. The density of NaCl is

asked Feb 25, 2014 by sharmaaparna1

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At room temperature , Sodium crystallizes in a b.c.c lattice with edge length $a = 4.24A^{\large\circ}$ . Find the theoretical density of sodium.

asked Feb 25, 2014 by sharmaaparna1

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The density of KBr is 2.73g/cm. The length of the unit cell is 654pm. Find the number of atoms per unit cell in the cubic structure.

asked Feb 25, 2014 by sharmaaparna1

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In CsCl with cubic structure $Cl^-$ ions are located at each corner and $Cs^+$ ions at the centre of the unit cell. If $r_{Cs^+}$ and $r_{Cl^-}$ are $1.69A^{\large\circ}$ and $1.81A^{\large\circ}$ respectively . Find the value of edge length of cube.

asked Feb 25, 2014 by sharmaaparna1

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The density of cr atoms is 7.2g/cm. If the unit cell has edge length 289 pm. Calculate the number of chromium atoms per unit cell. (at mass of cr = 52)

asked Feb 24, 2014 by sharmaaparna1

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Chromium metal crystallizes with a b.c.c lattice. The edge length of the unit cell is found to be 287pm. Calculate the density of chromium in $g\;cm^{-3}$(at weight of cr = 52).

asked Feb 24, 2014 by sharmaaparna1

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If the radius of $Cs^+$ is 169pm and that of $Cl^-$ is 181pm then find the co-ordination number of $Cs^+$

asked Feb 18, 2014 by sharmaaparna1

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The edge length of a face centered cubic cell of an ionic substance is 508 pm .If the radius of the carbon is 110pm , the radius of the anion is

asked Feb 17, 2014 by sharmaaparna1

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Copper Crystallizes in f.c.c with a unit cell length of 361 pm. What is the radius of copper atom?

asked Feb 17, 2014 by sharmaaparna1

1 answer

How many unit cells are present in a cubic shaped ideal crystals of NaCl of mass 1.0g?

asked Feb 17, 2014 by sharmaaparna1

1 answer

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