2 10.1 64. The number of moles of o...
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2 10.1 64. The number of moles of oxygen in one litre of air containing 21% oxygen by volume, in standard conditions, is: (a) 0.176 mol (b) 0.32 mol (c) 0.0093 mol (d) 2.20 mol

NEET/Medical Exams
Chemistry
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Volume of ( 0,2=0.21 times 1 ) le [ begin{array}{r} =0.21 l text { At st p. } 1 bmod =22 cdot 4 l operatorname{sos} 12=frac{1}{22 cdot 4} end{array} ] So, ( 0.21 R=frac{0.21}{22.4} mathrm{mol} ) [ begin{array}{l} =0.00937 mathrm{mol} mathrm{SO},(mathrm{C}) end{array} ]
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