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Empirical & Molecular Formula

A gaseous mix...

Question

A gaseous mixture of $H_{2}$ and $C O_{2}$ gas contains $66$ mass $%$ of $C O_{2}$ . The vapour density of the mixture is

A

6.1

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B

5.4

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C

2.7

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D

10.8

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Solution

The correct option is C $2.7$
$Number of moles of C O_{2} in 100 g mixture$
$= \frac{66}{44} = 1.5$
$Number of moles of H_{2} in 100 g mixture$
$= \frac{34}{2} = 17 M_{a v e r a g e} = \frac{100}{18.5} = 5.40 Vapour Density = \frac{5.4}{2} = 2.7$

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