Question

calculate the number of molecules of sulphur s8 present in 16 g of solid sulphur

Answer 1

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Answer 2

Molar mass of sulphur = 32

Therefore, molar mass of sulphur S8= 32×8= 256g/mol.

Number of moles=16/256=0.0625moles

Therefore, number of molecules = Number of moles × Avogadro's Number

$= 0.0625 \times 6.022 \times 10 ^{23}$

$= 0.3763 \times 10 ^{23} molecules$