The oxygen dissolved in water exerts a partial pressure of 20 kPa in the vapour above water. The molar solubility of oxygen in water is .... × 10–5 mol dm–3. (Round off to the Nearest Integer).
[Given : Henry's law constant = KH = 8.0 × 104 kPa for O2 .
Density of water with dissolved oxygen = 1.0 kg dm–3]