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Question
The molecular formula for elemental sulphur is S8. In a sample of 5.12 g of sulphur:
How many moles of sulphur are present?
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Solution
1 molecule of sulphur S8 = [32 x 8] = 256 g
Moles of (S8) in 256 g = 1
∴ Moles of (S8) in 5.12 g = `1/256 xx 5.12`
= 0.02
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