Question

The number of moles of oxygen in one literature of air containing 21% oxygen by volume ,understand conditions,is

Answer 1

1st try to write the question correctly. *One litre, *Under normal conditions.

100 litres of air contain 21 litre of oxygen

∴ 1 litre of air contains = 21/100 x 1=0.21 litre of oxygen

22.4 litre of oxygen = 1 mol of oxygen

∴ 0.21 litre of oxygen = 1/22.4 x 0.21=0.0093 mole of oxygen

∴ 1 litre of air contains 0.0093 mole of oxygen

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