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in Chemistry by (21.8k points)

At 27°C vapour density of the mixture of NO2 and N2O4 is 38.3. Calculate the moles of NO2 in 100 g mixture. 

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1 Answer

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Vapour density of mixture = 38.3

Molecular mass of mixture = 2 38.3

Mass of mixture = 100 g

Number of moles present = 100/2 x 38.3...(1)

Suppose mass of NO a gram

Mass of N2O4 (100 – a)gram

Moles of NO2 = w / M  = a / 46

Moles of N2O4 = w / M (100 - a)/92

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