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Mole Concept & Avogadro Number

The ratio by ...

Question

The ratio by mass of sulphur and oxygen in $S O_{2}$ is:

1 : 2

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2 : 1

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1 : 1

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1 : 4

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Solution

The correct option is B 1 : 1
In $S O_{2}$ , molar mass of S = $32 g m o l e^{- 1}$ & molar mass of $O_{2}$ = $32 g m o l^{- 1}$ .

Therefore the ratio of their masses = 32:32 = 1:1.

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