wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A compound AB has a rock type structure with A:B=1:1. The formula mass of AB is 6.023 y1/3 y amu and the closest A−B distance is y1/3 nm.Calculate the density of lattice.

A
5.0kg/m3
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
10kg/m3
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
50kg/m3
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
20kg/m3
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 5.0kg/m3
AB has rock-salt (A:B::1:1) structure, i.e., fcc structure (n=4) and formula mass of AB is 6.023 y g having closest distance ABy1/3 nm. Therefore, edge length of unit cell
(a)=2(A++B)=2×y1/3×109m
DensityofAB=n×formulamassAv.no.×V=n×formulamass6.023×1023×a3
=4×6.023×y×1036.023×1023×(2y1/3×109)3 (formula mass in kg)
=5.0kg/m3

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Density
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon