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  4. The number of atoms present in 0.1 mole of P4(at. mass = 31) are

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Q. The number of atoms present in 0.1 mole of $P_4$(at. mass = 31) are

Some Basic Concepts of Chemistry

Solution:

$0.1$ mole $p_{4}$ contains
$=4\times0.1\times6.02\times10^{23}\,P$ atoms
$0.05$ mole of $S_{8}$ contains
$=8\times0.05\times6.02\times10^{23}\,s$ atoms