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The composition of air is approximately ...

The composition of air is approximately 80% `N_(2) " and " 20% O_(2)` by mass. Calculate density of air at 298 K and 76 cm Hg pressure

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The correct Answer is:
`1.19 g L^(-1)`
Determine first average molecular mass of air and then apply `D= (P xx M_(av))/(RT)`
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