Here is the answer for the question – **If 0.98 g of an unknown was dissolved in 10.30 g of solvent and the resulting solution has a molality of 0.45 m, what is the molar mass of the unknown?**. You’ll find the correct answer below

### If 0.98 g of an unknown was dissolved in 10.30 g of solvent and the resulting solution has a molality of 0.45 m, what is the molar mass of the unknown?

**The Correct Answer is**

**211 g/molmol solute =molality Ã— kg solvent=0.45 m Ã—0.0130 kg=0.004563 mol solutemolar mass=0.98 g0.004653 mol=211 g/mol**

### Reason Explained

211 g/molmol solute =molality Ã— kg solvent=0.45 m Ã—0.0130 kg=0.004563 mol solutemolar mass=0.98 g0.004653 mol=211 g/mol is correct for If 0.98 g of an unknown was dissolved in 10.30 g of solvent and the resulting solution has a molality of 0.45 m, what is the molar mass of the unknown?