Calculate the number of moles in 16g of ${SO}_{2}$ ?

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Solution

Given mass, w = 16g
Molecular weight of Sulphur dioxide (SO₂) = $32 + (2 \times 16)$ = 64 u
Gram molecular weight of SO₂, M = 64 g
No. of moles, n = $\frac{w}{M}$ = $\frac{16}{64}$ = 0.25 moles
Therefore the number of moles in 16g of SO₂ is 0.25 moles.

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