Question

calculate the number of molecules of sulphur S8 present in the 16 gram of solid Sulphur

Answer 1

1 mole
$6.022 \times {10}^{23}$
so
$8 \times 32$ = 256
so
equate 8 ×32 with 6.022 ×10^23
now
16/256 × Avogadro no.
ans u will get
1.541 × 10^26

Answer 2

$\huge\mathfrak\green{answer!}$

To calculate molecular mass of sulphur:

Molecular mass of Sulphur (S8) = 8xMass of Sulphur = 8×32 = 256g

Mass given = 16g

Number of moles = mass given/ molar mass of sulphur

= 16/256 = 0.0625 moles

To calculate the number of molecules of sulphur in 16g of solid sulphur:

Number of molecules = Number of moles X Avogadro number

= 0.0625 x 6.022 x 10²³ molecules

= 3.763 x 10²² molecules

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