Find the molality of 16.gof methanol in 100ml of solid density is0.96
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I'm solving this assuming the units of density as 0.96 g/ml
Number of moles in 16grams of methanol = 16/32 = 0.5moles
Mass of solvent = 100 x 0.96 = 96 grams = 0.096kg
number of moles of solute 0.5
Molality = ------------------------------------ = ---------- = 5.2
mass of solvent (in kg) 0.096
Therefore the molality is 5.2.
Number of moles in 16grams of methanol = 16/32 = 0.5moles
Mass of solvent = 100 x 0.96 = 96 grams = 0.096kg
number of moles of solute 0.5
Molality = ------------------------------------ = ---------- = 5.2
mass of solvent (in kg) 0.096
Therefore the molality is 5.2.
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