According to Henry's law C = k P where C = concentration of gas (g/L) k : Henry's constant P : pressure of gas above the solution concentration of gas = 5.6 g / 3.5 L = 1.6 g/L From Henry's law: C₁ / C₂ = P₁ / P₂ C₂ = C₁P₂ / P₁ = (1.6 * 5 atm) / 2.5 atm = 3.2 g/L so the 3.5 L will contain 11.2 g gas
