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प्रश्न
A compound X consists of 4.8% carbon and 95.2% bromine by mass. If the vapour density of the compound is 252, what is the molecular formula of the compound?
उत्तर
Empirical formula mass = 12 + 3 × 80 = 252 g
Molecular formula mass = 2 × 252(V.D) = 504 g
n = `"Molecular mass"/"Empirical formula mass"`
= `504/252`
= 2
∴ Molecular formula = 2 × C1Br3
= C2Br6
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