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The Atmosphere

Moles of N2 =...

Question

Moles of $N_{2} = 0.4$ and moles of $O_{2} = 0.1$ Find $p_{N_{2}}$ i.e. partial pressure of $N_{2}$ at atmospheric pressure.

A

0.2 a t m

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B

0.8 a t m

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C

0.6 a t m

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D

0.4 a t m

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Solution

The correct option is B $0.8 a t m$
Mole fraction of $N_{2}$ :
$\frac{0.4}{0.4 + 0.1} = \frac{4}{5} = 0.8$
$Partial pressure=Mole fraction×Total pressure=0.8×1Partial pressure=0.8 atm$

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