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Q.

45 g of gaseous mixture of $N O_{2}$ and $N_{2} O$ gas occupy 22.7 litre at STP. Find the mole % of ${NO}_{2}$ in the gaseous mixture.

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answer is 50.

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Detailed Solution

We know about the value of gaseous mixture

$45 = \frac{x \times 46 + y \times 44}{x + y}$

the mole % of ${NO}_{2}$ in the gaseous mixture.

$\Rightarrow x = 0.5 or 50 %$

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