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Q.

The mass of a litre of dry air at N.T.P is 1.293 g. Find the mass of 3 litres of air at 117°C and a pressure of 4 atmospheres _____ (in grams)

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answer is 10.86.

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Detailed Solution

$\frac{P_{1} V_{1}}{m_{1} T_{1}} = \frac{P_{2} V_{2}}{m_{2} T_{2}}$

$m_{2} = \frac{1.293 \times 273 \times 12}{390} = 10.86 gm$

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