The composition of air is and by volume

CHEMISTRY · Subjective · A Level · Chemistry · Amount of substance · Amount of substance

Problem

The composition of air is

20\%

\text{O}_2

and

80\%

\text{N}_2

by volume. If

10 \text{ litre}

of air is placed at

24.9584 \text{ atm}

and

304 \text{ K}

, the mole of

\text{O}_2

present to closest integer values are....