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To an evacuated Vessel with movable piston under external pressure of 1 atm ,0.1 mole of He and 1.0 mole of an unknown compound (Vapour pressure 0.68 atm. At $0^{0} C$ ) are introduced. Considering the ideal gas behaviour, the total volume (in litre) of the gases at $0^{0} C$ is close to __________

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answer is 7.

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Detailed Solution

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$P_{H e} V = n_{H e} R T$

$V = \frac{0.1 \times 0.082 \times 273}{0.32} = 7 l i t r e$

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To an evacuated Vessel with movable piston under external pressure of 1 atm ,0.1 mole of He and 1.0 mole of an unknown compound (Vapour pressure 0.68 atm. At 00C) are introduced. Considering the ideal gas behaviour, the total volume (in litre) of the gases at 00C is close to __________