How many molecules of sulphur are present in 12.8 g of sulphur (atomic mass of s = 32)?
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Answer:
5× 10^21 molecules
Explanation:
Gram Atomic mass of Sulphur = 32g Molar mass of sulphur (S8) = 8 × 32g = 256g ∴ 256g of sulphur (S8) = 6.023 × 10^23 molecules 12.8gof sulphur (S8) = 6.023 × 10^23 × 12.8/ 256 = 5 × 10^21 molecules
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