Question

The number of unit cell in 58.5 g of NaCl is nearly

Solution

Correct option is

1.5× 1023

 

58.5 g NaCl = 1 mol = 6.023 × 1023 NaCl units.

One unit cell contains 4 NaCl units.

Hence, number of unit cell present

                                 

SIMILAR QUESTIONS

Q1

The correct statement in the following is

Q2

 

The crystal system of a compound with unit cell dimensions,

a = 0.387, b = 0.387 and c = 0.504 nm, and α = β = 900 and γ = 1200 is

Q3

If Z is the number of atoms in the unit cell that represents the closest packing sequence …… ABC ABC …… the number of tetrahedral voids in the unit cell is equal to

Q4

In which of the following crystals alternate tetrahedral voids are occupied?

Q5

A solid is made of two elements X and Z. the atoms Z are in ccp arrangement while the atom X occupy all the tetrahedral sites. What is the formula of the compound?

Q6

An element occurring in the bcc structure has 12.08 × 1023 unit cells. The total number of atoms of the elements in these cells will be

Q7

The number of sphere contained (i) in one body centred cubic unit cell and (ii) in one face centred cubic unit cell, is

Q8

CsBr crystal has bcc structure. It has an edge length of 4.3. the shortest interionic distance between Cs+ and Br –  ions is

Q9

 

The number of atoms in 100 g of an fcc crystal with density,

d = 10g/ cm3 and cell edge equal to 100 pm, is equal to

Q10

Analysis shows that an oxide ore of nickel has formula Ni0.98O1.00. The percentage of nickel as Ni3+ ions is nearly