﻿ The vapour density of a mixture of NO2 and N2O4 is 38.3 at 26.7oC. Calculate the number of moles of NO2 in 100 g of the mixture. : Kaysons Education

# The vapour density Of A Mixture Of NO2 and N2O4 is 38.3 At 26.7oC. Calculate The Number Of Moles Of NO2 in 100 G Of The Mixture.

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## Question

### Solution

Correct option is

0.437

Suppose NO2 present in 100 g of the mixture = g

Then N2O4 present in the mixture = (100 – x)g

Molar mass of NO2 = 14 + 32 = 46 g mol–1

Molar mass of N2O4 = 92 g mol–1

Molar mass of mixture

Expressing all quantities in terms of moles, we should have

or  92 + 4600 – 46= 5524.8

or 46x = 924.8

or     x = 20.1 g

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