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The compound MO (molar mass = 100 g mol^...

The compound MO (molar mass = 100 g `mol^(-1)`) has zinc-blende structure. If the radius of `M^(2+)` is 69.4 pm, the density of MO will be

A

A.`2.5gcm^(-3)`

B

B.`1.5gcm^(-3)`

C

C.`0.75gcm^(-3)`

D

D.`1.0gcm^(-3)`

Text Solution

Verified by Experts

The correct Answer is:
D
`r_(a)=r_(c)//0.225=69.4"pm"//0.225=308.4"pm"," "a=2sqrt2r_(a)=2sqt2(308.4"pm")=872.4"pm"`
`d=(zM)/(N_(A)xxa^(3))=(4xx100)/(6.02xx10^(23)xx(872.4xx10^(-10))^(3))=1gcm^(-3)`
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