Question

the number of mole of Oxygen in one litre of air containing 21% oxygen by volume under standard condition is​

Answer 1

at stp volume of 1 mole gas = 22.4l

so no of moles = 1/22.4 × volume

= 1/22.4 ×21/100

(since % of oxygen is 21 % so we take volume as 210/1000 ml)

no of moles = 0.009375 ...

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