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If dry air is considered to have only ni...

If dry air is considered to have only nitrogen and oxygen and is found to have average molecular mass 28.84. what is the composition of dry Air ?

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`28.84 = (28 xx x + 32(100 -x))/(100)`
`x = 0.79` i.e `N_(2) = 79%, O_(2) = 21%`
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