The mass of naphthalene (solute) in 1 kg (or 1000 g) of benzene (solvent) equals
"m=\\frac{16.5\\times1000}{54.3}=" "304g"
Moles of naphthalene:
"n=\\frac{304g}{248g\/mol}=1.23 mol"
Therefore, the molality equals 1.23 m
Answer: 1.23 m
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