Sodium weighing 2.3 g was dissolved in water. determine the molar concentration of the substance in the resulting solution

Sodium weighing 2.3 g was dissolved in water. determine the molar concentration of the substance in the resulting solution, the volume of which was 500 cm ^ 3.

When sodium is dissolved in water, the reaction proceeds:
1) Calculate the amount of dissolved sodium: M (Na) = 23 g / mol, n (Na) = 2.3 / 23 = 0.1 mol;
2) Determine the amount of sodium hydroxide formed: n (NaOH) = n (Na) = 0.1 mol;
3) Calculate the molar concentration of sodium hydroxide: V (solution) = 500 cm ^ 3 = 0.5 l, C = 0.1 / 0.5 = 0.2 mol / l;
Answer: 0.2 mol / l