No. of moles of oxygen in 1l of air containing 21% oxygen by volume in stp
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volume of oxygen in 1l of air = 1×21/100=0.21 l.
no. of moles of oxygen in 22.4 l =1 mole
no of moles of oxygen in 0.21 l =1/22.4×0.21
=0.009375 moles
no. of moles of oxygen in 22.4 l =1 mole
no of moles of oxygen in 0.21 l =1/22.4×0.21
=0.009375 moles
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