Oxygen gas makes up 21 % of the atmosphere by volume.What is the solubility of O₂(g)in water at 25°C if the atmospheric pressure is 741 mmHg? The Henry's law constant for oxygen gas at 25°C is 1.3 × 10^-3 mol/L·atm. A)2.7 × 10^-4 M B)1.3 × 10^-3 M C)6.2 × 10^-3 M D)9.6 × 10^-3 M E)0.96 M

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Quizplus · Accepted Answer

The partial pressure of O₂ is 0.21 × 741 mmHg = 155.61 mmHg = 0.204 atm. Using Henry's law, solubility = k × P = 1.3 × 10⁻³ mol/L·atm × 0.204 atm = 2.7 × 10⁻⁴ M.

Oxygen Gas Makes Up 21 % of the Atmosphere by Volume.What