In an orthorhombic crystal system,the values | vedclass

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(C) The formula for density $(d)$ is given by: $d = \frac{Z 	imes M}{N_A 	imes V}$ Rearranging for $Z$: $Z = \frac{d 	imes N_A 	imes V}{M}$ Volume

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$4$

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(C) The formula for density $(d)$ is given by: $d = \frac{Z 	imes M}{N_A 	imes V}$ Rearranging for $Z$: $Z = \frac{d 	imes N_A 	imes V}{M}$ Volume $(V)$ = $a 	imes b 	imes c = 4.2 	imes 8.6 	imes 8.3 	imes 10^{-24} \, cm^3 = 299.712 	imes 10^{-24} \, cm^3$ Substituting the values: $Z = \frac{3.3 	imes 6.022 	imes 10^{23} 	imes 299.712 	imes 10^{-24}}{155}$ $Z = \frac{3.3 	imes 6.022 	imes 29.9712}{155} \approx \frac{595.6}{155} \approx 3.84$ Since $Z$ must be an integer,the number of formula units per unit cell is $4$.

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