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A polythene bag of 3 litre capacity is filled by helium gas (Occupying 1 L at 0.3 atm and 300K) at 300 K. Subsequently enough Ne gas is filled to make total pressure 0.4 atm at 300 K. Calculate ratio of moles of Ne to He in container.

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Detailed Solution

Here,

$n_{He} = \frac{0.3 \times 1}{R \times 300}; P_{He} = [\frac{\frac{0.3 \times 1}{R \times 300} \times R \times 300}{3}] = 0.1 atm$

$\begin{array}{l} ∴ P_{Ne} = 0.4 - 0.1 = 0.3 \\ \frac{n_{Ne}}{n_{He}} = \frac{P_{Ne}}{P_{He}} = \frac{0.3}{0.1} = \frac{3}{1} \end{array}$

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