Sodium phosphide is the inorganic compound with the formula Na3P.
2Na + 2H2O ——> 2 NaOH + H2
Answer: 10 moles/kg.
Explanation:
Given, Mass of solute = 24.2 g
Molar mass of solute = 24.2 g/mol

Mass of solvent = 100.0g = 0.1 kg [1 g=0.001 kg]

Hence, the molality of the resulting solution is 10 moles/kg.