For the reaction ; is atm

CHEMISTRY · Subjective · A Level · Chemistry · Gaseous equilibria (Kp) · Gaseous equilibria (Kp)

Problem

K_P

for the reaction

2\text{O}_3(\text{g}) \rightleftharpoons 3\text{O}_2(\text{g})

; is

1.3 \times 10^{57}

atm. How many

\text{O}_3

molecules are present in equilibrium in 10 million cubic metres of air at 25°C and 720 mm Hg pressure?