A solution is formed by mixing 0.400 mol NaOH into 0.800 kg water. What is the best set up to find molality?

Molality is calculated as moles of solute divided by kilograms of solvent. Here, NaOH is the solute and water is the solvent, so the setup is 0.400 mol NaOH ÷ 0.800 kg water. Therefore, the correct choice is “mol solute/kg solvent.”

AI-written and checked against the verified answer.