(D) In an $hcp$ structure,for each atom,there is $1$ octahedral void and $2$ tetrahedral voids.Number of atoms $= 0.25 \ mol \times 6.022 \times 10^{2

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$1.50 \times 10^{23}, 3.011 \times 10^{23}$

(D) In an $hcp$ structure,for each atom,there is $1$ octahedral void and $2$ tetrahedral voids.Number of atoms $= 0.25 \ mol \times 6.022 \times 10^{23} \ atoms/mol = 1.5055 \times 10^{23} \ atoms$.Number of octahedral voids $= \text{Number of atoms} = 1.5055 \times 10^{23} \approx 1.50 \times 10^{23}$.Number of tetrahedral voids $= 2 \times \text{Number of atoms} = 2 \times 1.5055 \times 10^{23} = 3.011 \times 10^{23}$.

Class 12 Chemistry Solid State Crystal packing

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What is the number of octahedral and tetrahedral voids present respectively in $0.25 \ mol$ of a substance having $hcp$ structure?

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A
$3.011 \times 10^{23}, 1.50 \times 10^{23}$
B
$6.011 \times 10^{23}, 3.011 \times 10^{23}$
C
$3.011 \times 10^{23}, 6.022 \times 10^{23}$
D
$1.50 \times 10^{23}, 3.011 \times 10^{23}$

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What is the number of octahedral and tetrahedral voids present respectively in $0.25 \ mol$ of a substance having $hcp$ structure?

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