5.936g of methanol must be dissolved in 313 ml of ethanol to prepare 0.750m solution.
What is molality?
Molality is defined as number of moles of solute divided by mass of the solvent in kg. It is denoted by m. Its unit is mol/kg
Molarity= (given mass/ molar mass) / mass of solvent] × 1000
using density = mass/ 313ml
mass = 247.0509 g
0.750= (given mass/ 32.04÷247.0509) ×1000
given mass of methanol = (0.750×32.04× 247.0509)/1000= 5.936 g
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