The flask is filled with dry hydrogen iodide under normal conditions. Then the flask was filled with water

The flask is filled with dry hydrogen iodide under normal conditions. Then the flask was filled with water, in which hydrogen iodide was completely dissolved. Determine the mass fraction of hydrogen iodide in the solution.

Let the volume of the flask be 1 l, m (H2O) = 1000 g.

ν (HI) = V / Vm = 1 L / 22.4 L / mol = 0.0446 mol;

M (HI) = 1 + 127 = 128 g / mol;

m (Hl) = ν * M = 0.0446 mol * 128 g / mol = 5.7 g;

ω (HI) = m (HI) / m (H2O + HI) = 5.7 g / (1000 + 5.7) g = 5.7 g / 1005.7 g = 0.0057;

0.0057 = 0.57%.

Answer: 0.57%.