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Mole Concept & Avogadro Number

SO3 contains ...

Question

$S O_{3}$ contains sulphur and oxygen in the mass ratio of $x : y$ . Then, $x + y$ is :

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Solution

$S O_{3}$ mass ratio,
$S : O = 32 : 48 = 2 : 3$
So, $x + y = 2 + 3 = 5$ .

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