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 × kg solvent=0.45 m ×0.0130 kg=0.004563 mol solutemolar mass=0.98 g0.004653 mol=211 g/mol
Reason Explained
211 g/molmol solute =molality × kg solvent=0.45 m ×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?
