The molar mass of an unknown non-electrolyte is 165g/mol.
What is molar mass?
The molar mass of a chemical compound is defined in chemistry as the mass of a sample of that compound divided by the amount of substance, which is the number of moles in that sample, measured in moles. The molar mass of a substance is a bulk, rather than a molecular, characteristic.
∆T = imK
∆T= 5.5 - 5.14 = 0.36 degrees
Van't Hoff factor for a non-electrolyte is 1; molality is moles of unknown per kilogram of solvent; and constant is 5.12
When we solve for 'm', we have...
m = ∆T/(i)(K) = 0.36/5.12 m = 0.0703 moles unknown/kg solvent
Since the solvent has a mass of 50 g that is = 0.050kg
0.0703 mol/kg x 0.050 kg = 0.00351moles
molar mass = 0.58g/0.00351 mol = 165 g/mol
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