Question

Which solution has a molality of 0.25m nacl?

Answer 1

0.25 moles of NaCl over 1 kg of water

Answer 2

Molality can be expressed by moles of solute over kilograms of solvent. The question asks the molality of 0.25m NaCl. 0.25m NaCl is equal to 0.25 moles of NaCl over 1 kg of water.