1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

# Lithium borohydride crystallizes in an orthorhombic system with 4 molecules per unit cell. The unit cell dimensions are a = 6.8 ∘A , b = 4.4 ∘A and c = 7.2 ∘A. If the molar mass is 21.76 g, calculate density of the crystal.

A
0.6708 gcm3
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B

0.7608 gcm3

No worries! We‘ve got your back. Try BYJU‘S free classes today!
C

0.8808 gcm3

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

0.5608 gcm3

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

## The correct option is A 0.6708 gcm−3Since, Density, ρ=n × MVolume × Av.No Where n = 4, Av. No = 6.023×1023 , and Volume = V = (a×b×c) cm3 =6.8×10−8×4.4×10−8×7.2×10−8 cm3=2.154×10−22cm3∴density,ρ=4 × 21.762.154×10−22 × 6.023×1023=0.6708 gcm−3

Suggest Corrections
1
Join BYJU'S Learning Program
Related Videos
Density
CHEMISTRY
Watch in App
Explore more
Join BYJU'S Learning Program