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[" Density of dry air containing only "N...

[" Density of dry air containing only "N_(2)" and "O_(2)" is "1.15g/L" at "740mm" and "300K" .What is "%],[" composition of "N_(2)" by weight in the air? "],[[" (a) "78%," (b) "85.5%," (c) "70.02%," (d) "62.75%]]

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