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Why is the dipole moment of NH3 greater then that of NF3 ??
If Nacl is doped with 10-3 mole % of Srcl2 , what is the concentration of cation vacancies?
chemistry chapter wise marks(cbse board)
what is F centre?
equivalent weight of silver nitrate
why are frenkel defects not found in pure alkali halides?
best reference books for class12 science[cbse]
Q. Why old glass objects appear slightly milky instead of being transparent?
What is Schottky and Frenkel defects?
why does AgBr show both frenkel n schottky defect? and why does ONLY AgBr show both d defects?
The number of atoms in 100g of FCC crystal with density = 10g/cm3 and cell edge equal to 200 pm is equal to _____?
a mineral having formula AB2 crystallises in the ccp lattice, with A atoms ocupying the lattice points.
what is the coordination numer of A and B atoms
what is cryoscopic constant?
If the radius of the tetrahedral void is r and radius of the atoms in close packing is R, derive the relation between r and R?
Which point defects lowers the density of a crystal?
THE density of 3M aqueous solution of sodium thiosulphate is 1.25g/mL. Calculate 1. mole fraction of sodium thiosulphate
2. molalities of Na+ and S2O32-
calculate the distance between Na+ and Cl- ions in NaCl crystal if its density is 2.165 gcm-3 (molar mass of NaCl = 58.5gmol-1 NA = 6.02 x 10 23 mol-1)
A compound formed by elements X and Y crystallizes in the cubic structure where Y atoms are at the corners of the cube and X atoms are at the alteranate faces. What is the formula of the compound?
what is pseudo solid
in a solid 'AB' having Nacl structure, A atoms occupy corners of cubic unit cell. if the face centered atoms along one of axis are removed then resultant stoichometry of solid is?
in a face centered cubic lattice, a unit cell is shared equally by how many unit cells?
what r the differences between tetrahedral and octahedral void?
The pyknometric density of sodium chloride crystal is 2.165 x 103 kg m-3 while its X-ray density is 2.178 x 103 kg m-3. The fraction of the unoccupied sites in sodium chloride crytal is?
what is the coordination number in hcp and ccp arrangement????
atoms of the element B form hcp lattice and those of element A occupy 2by3rd part of tetrahydral voids what is the formula of the compound formed by the element A and B
two differences between tetrahedral void and octahedral void?
25.3 g of sodium carbonate is dissolved in enough water to make 250 mL of solution.If sodium carbonate dissociates completely,molar concentration of sodium ion,Na+ and carbonate ions,CO3^2- are respectively.......
Why does KCl turn violet on heating in the potassium vapor?
Please reply to this question as soon as possible.It's very important for me!!!!!!.
difference between schottky defect and frenkel defect
Ques.The density of copper metal is 8.95 g cm3. If the radius of copper atom is 127.8 pm, is the copper unit cell a simple cubic, a body-centred cubic or a face centred cubic structure? (Given: At. Mass of Cu = 63.54 g mol1and NA= 6.02 × 1023mol1)
What is the difference between crystal lattice and unit cell?
calculate the number of atoms in cubic based unit cell having one atom at each corner and two atoms at body diagonal.
a compound forms hexagonal close packed structure. what is the total number of voids in 0.5mol of it? how many of these are tetrahedral voids?
KMnO4 reacts with oxalic acid according to the equation2MnO4- +5C2O4^2- +16OH- -2MnO2+ + 10CO2 + 8H20here 20 mL of 0.1 M KMnO4 is equivalent to.....
1. 50mL of 0.5 M C2H2O4
2. 20 mL of 0.1 M C2H2O4
3. 20 mL of 0.5 M C2H2O4
4. 50 mL of O.1 M C2H2O4
Specific volume of cylindrical virus particle is 6.02 * 10-2 cc/gm whose radius and length are 7angstrom and 10angstrom respectively.If NA=6.02 *10^23 find molecular weight of virus???
Sodium crystallizes in a BCC unit cell. Calculate the approximate no. of unit cell in 9.2 gm of sodium?
which stoichiometric defect in crystals increases the density of a solid?
What type of stoichiometric defect is shown in Zns and AgBr?
What are non-polar molecular solids?
The density of crystalline CsCl is 3.988 g/cm3. The volume effectively occupied by a single CsCl ion pair in the crstal is [molecular mass CsCl=168.4](A)7.01 X 10-23 cm3
(B)2.81 X 10-22 cm3
(C)6.022 X 1023 cm3
(D)3.004 X 10-23 cm3
Write the I.U.P.A.C name:-
i) Fe4 [Fe(CN)6]3
ii) Na3 [Fe(C2O4)3]
what is the distance bet'n 2 tetrahedral voids in ccp structure ???????
1. a/root 2
answer is 4
pls explain metal excess and metal deficiency defect again...or by a video...ASAP
whta type of crystal defect is produced when NaCl is doped with MgCl2?
valency of silver nitrate
why frenkel defect does not change the density of agcl crystals???
what is the difference between isomorphism and polymorphism pls explain with some examples too..
can u store copper sulphate solution in zinc pot?
an element has bcc with a cell edge of 288pm the density of the element is 7.2 gm/cm^3. how many atoms are present in 208gm of the element?
WHT IS OCTAHEDRAL VOID AND TETRAHEDRAL VOIDS
conductivity of silicon increases on doping it with phosphorus reason
In a fcc arrangement of A and B atoms. A are present at the corners of
Q1)What is the coordination no. of each type of ions in a rock-salt type crystal structure? how?
Potassium crystallizes in a body centred cubic lattice.calculate the approximate number of unit cells in 1g of potassium.(Atomic mass of the potassium is 39u)
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