Question

Calculate the number of molecules of sulphur (S) present in
16 g of solid sulphur.
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Answer 1

it's your ans-..

$given \: mass = 16 gram$

$atomic \: \: mass = 32 gram$

$number \: \: of \: \: molecules \: \: of \: sulphur = ?$

$by \: \: formula....$

$number \: of \: molecules \: of \: sulphur = \frac{given \: mass}{molecular \: mass} \: \times avagadro \: no.$

$= \frac{16}{32} \times 6.02 \times {10}^{23}$

$= 3.01 \times {10}^{23} \: molecules$

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