A cylinder containing at was leaking

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

Problem

A cylinder containing

5.0 \text{ litre}

\text{O}_2

25^\circ\text{C}

was leaking. When the balloon leakage was detected and stopped, there was a change in the pressure of the gas from

3.0 \text{ atm}

2.235 \text{ atm}

. The massing of

\text{O}_2

leaked out is .....