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A compound AB has a simple cubic structu...

A compound AB has a simple cubic structure and has molecular mass 99. Its density is `3.4 g cm^(-3)` What will be the edge of the unit cell ?

A

`3.6 xx 10^(-8) cm`

B

`4.2 xx 10^(-6) cm`

C

`3.8 xx 10^(-8) cm`

D

`4.6 xx 10^(-6) cm`

Text Solution

Verified by Experts

The correct Answer is:
A
`rho = (Z xx M)/(a^3 xx N_A) g//cm^3`
`3.4 = (1 xx 99)/(a^3 xx 6.023 xx 10^23)`
`a^3 = (99)/(3.4 xx 6.023 xx 10^23) `
` a = 3.6 xx 10^(-8) cm` .
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