Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • Confused! kindly explain, A metal crystallizes in BCC lattice. Its unit cell edge length is about 300 pm and its molar mass is about 50. What would be the density of metal in gm cm-3 ?

A metal crystallizes in BCC lattice. Its unit cell edge length is about 300 pm and its molar mass is about 50. What would be the density of metal in gm cm-3 ?

  • Option 1)

    3.1

  • Option 2)

    6.2

  • Option 3)

    9.3

  • Option 4)

    12.4

 

Answers (1)

best_answer

d=\frac{ZM}{a^{3}N_{A}}

=\frac{2\times 50}{\left ( 3\times 10^{-8} \right )^{3}\times 6.02\times 10^{23}}=6.2gm/cm

 

Density of cubic unit cell -

d = \frac{zM}{a^3N_o}

 

- wherein

Where,

d = density of crystal

z = no. of effective constituent particles in one unit cell

M = molecular weight

a = edge length of unit cell

No = 6.022*1023

 


Option 1)

3.1

This is incorrect

Option 2)

6.2

This is correct

Option 3)

9.3

This is incorrect

Option 4)

12.4

This is incorrect

Posted by

prateek

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2024 session 2 final answer key soon at jeemain.nta.ac.in; result on April 25
anam-khan

JEE Main 2024 Session 2: Last day to challenge answer key today
anam-khan

BTech admission 2024 without JEE; top government engineering colleges, upcoming entrance exams

Latest Question