At 100^{\circ}C , copper (Cu) has FCC unit cell structure with cell edge length of x\AA. . What is the approximate density of

Cu(in\; gcm^{-3})  at this temperature ?

[ Atomic Mass of Cu = 63.55 u]

  • Option 1)

    \frac{105}{x^{3}}

  • Option 2)

    \frac{211}{x^{3}}

  • Option 3)

    \frac{205}{x^{3}}

     

  • Option 4)

    \frac{422}{x^{3}}

Answers (1)
A admin

 

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

The FCC unit cell has Z=4

d=\frac{63.5\times 4}{6\times 10^{23}\times x^{3}\times 10^{-24}}g/cm^{3}

d=\frac{63.5\times 4\times 10}{6\times x^{3}}g/cm^{3}

d=\frac{423.33}{ x^{3}}g/cm^{3}

 


Option 1)

\frac{105}{x^{3}}

Option 2)

\frac{211}{x^{3}}

Option 3)

\frac{205}{x^{3}}

 

Option 4)

\frac{422}{x^{3}}

Preparation Products

Knockout JEE Main April 2021 (One Month)

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Weekend Live Classes, Mentorship from our Experts, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 14000/- ₹ 4999/-
Buy Now
Knockout JEE Main May 2021

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Weekend Live Classes, Mentorship from our Experts, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 22999/- ₹ 9999/-
Buy Now
Test Series JEE Main May 2021

Unlimited Chapter Wise Tests, Unlimited Subject Wise Tests, Unlimited Full Mock Tests, Get Personalized Performance Analysis Report,.

₹ 6999/- ₹ 2999/-
Buy Now
Knockout JEE Main May 2022

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Weekend Live Classes, Mentorship from our Experts, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 34999/- ₹ 14999/-
Buy Now
JEE Main Rank Booster 2021

Booster and Kadha Video Lectures, Unlimited Full Mock Test, Adaptive Time Table, 24x7 Doubt Chat Support,.

₹ 13999/- ₹ 6999/-
Buy Now
Boost your Preparation for JEE Main 2021 with Personlized Coaching
 
Exams
Articles
Questions