Question
Mon July 16, 2012 By: Kumar Sharat Sinha
 

how many moles of oxygen are contained 1 L of air if its volume content is 21% at ntp?

Expert Reply
Thu July 19, 2012
21% of 1Litre = 210ml

I mole of Oxygen at NTP occupies 22.4 l i.e. 22400 ml

So, 22400 ml = 1 mole
210 ml = 1/22400 x 210 = 0.009375 mole
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