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  4. 8 gm O 2, 14 gm N 2 and 22 gm CO 2 is mixed in a container of 10 litre capacity at 27° C. The pressure exerted by the mixture in terms of atmospheric pressure will be -

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Q. $8\, gm\, O _{2},\, 14\, gm\, N _{2}$ and $22\, gm\, CO _{2}$ is mixed in a container of $10$ litre capacity at $27^{\circ} C$. The pressure exerted by the mixture in terms of atmospheric pressure will be -

Solution:

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$P V=n R T$
$P=\frac{n R T}{V}=\frac{5}{4} \times \frac{8.31 \times 300}{10 \times 10^{-3}}$
$=3$ atm